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Photocatalytic Degradation Of Dyes

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Photocatalytic Degradation of Dyes

Photocatalytic Degradation of Dyes Book
Author : Sushma Dave,Jayashankar Das,Maulin P. Shah
Publisher : Elsevier
Release : 2021-08-16
ISBN : 9780128238769
Language : En, Es, Fr & De

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Book Description :

Photocatalytic Degradation of Dyes: Current Trends and Future Perspectives covers in detail current trends and future aspects on photocatalytic degradation of organic dyes using novel photocatalytic techniques such as metallic nanoparticles, heterogeneous and hybrid systems using visible light irradiation. It highlights the most recent scientific and technological achievements and importance of degradation of dyes in the textile effluent by simple environmental friendly approaches using eco-friendly catalysts. It is of assistance to everyone interested in bioremediation of effluents : professionals, consulting engineers, academicians, and research scholars as well. Describes the basic photocatalytic techniques and their application in wastewater treatment Covers the key reactive species accounting for the photodegradation of different dyes, providing helpful guidelines that could be applied to foster the development of efficient photodegradation systems Includes Description of a wide variety of catalysts and their application in degradation of dyes in the effluent of variable matrices (such as textile effluent, pharmaceutical industry effluent, food industry effluent) Presents the application of doped semiconductors in the degradation of dyes, hybrid systems and their importance in the dye degradation Describes the biological synthesis of metallic nanostructures and their use in dye degradation using visible range of light irradiation Discusses the mechanistic aspect of the dye degradation using photo catalysts

Photocatalytic Degradation of Textile Dyes on Cu2O CuO TiO2 Anatase Powders

Photocatalytic Degradation of Textile Dyes on Cu2O CuO TiO2 Anatase Powders Book
Author : Anonim
Publisher : Unknown
Release : 2016
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Graphical abstract: Highlights: Non noble metal supported Cu2 O-CuO/TiO2 catalysts have been prepared and characterized. Photodegradation of textile dyes on Cu2 O-CuO/TiO2 is studied. TiO2 anatase is preferred over P25 as former can be obtained with much higher surface area. Abstract: TiO2 anatase photocatalysts with ca. 2, 4 and 8 wt.% copper metal loading have been employed for the photocatalytic degradation of textile dyes (one of the major contaminants in effluent from textile industries around the world) and their degradation efficiencies compared with benchmark Degussa P25. In order to investigate their surface and bulk composition, all catalysts were characterized using XRD, UV–vis, XPS and TEM techniques. TEM and XPS results confirmed the presence of Cu in its oxide form (Cu2 O-CuO). Under optimized conditions (i.e. catalyst dose of 125 mg L −1 and initial dye concentration of 5 mg L −1 ), Degussa P25 showed 76% degradation efficiency for primary reactive blue 49 (RB 49) dye in 80 min. However, under the same optimized conditions, a complete primary RB 49 dye removal was observed at ca. 4 wt.% Cu2 O-CuO/TiO2 catalyst. Kinetics analysis of photodegradation ( kd ) nearly followed a pseudo-first-order kinetic model with a regression coefficient (R 2 ) value in the range of 0.97–0.86 for 4 wt.% Cu2 O-CuO/TiO2 catalyst. These results indicate that non noble supported TiO2 anatase may be a better choice for photocatalytic dye degradation as compared to other commercially available photocatalysts.

Photocatalytic Degradation of Dyes Using M2Mo3O12 XMoO3 x

Photocatalytic Degradation of Dyes Using M2Mo3O12 XMoO3  x Book
Author : Paila Suresh,Tadi Narasimha Murthy
Publisher : Unknown
Release : 2017
ISBN : 9783330044296
Language : En, Es, Fr & De

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Book Description :

Download Photocatalytic Degradation of Dyes Using M2Mo3O12 XMoO3 x book written by Paila Suresh,Tadi Narasimha Murthy, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Titanium Dioxide Films for Photocatalytic Degradation of Methyl Orange Dye

Titanium Dioxide Films for Photocatalytic Degradation of Methyl Orange Dye Book
Author : Rodrigo Teixeira Bento
Publisher : Unknown
Release : 2018
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

The aim of this work was to characterize and evaluate the influence of the thickness on the photocatalytic efficiency of titanium dioxide thin films on the degradation of methyl orange dye under UV light irradiation. The films of 280 and 468 nm thick were deposited on borosilicate substrates at 400°C by the MOCVD technique using titanium isoproxide IV as precursor. XRD analyses showed the formation of anatase-TiO2 phase. Cross-sectional FE-SEM images show that the films presented a dense columnar structure and grown perpendicularly to the substrate surface. The photocatalytic activity of the catalysts was studied using UV-vis spectrophotometry The TiO2 film with 468 nm of thickness presented higher photocatalytic activity exhibiting 69% of dye degradation. The increase of grain size and thickness of the films promoted an improvement of photocatalytic efficiency.

Photocatalysis in a Packed Bed Degradation of Organic Dyes by Immobilized Silver Nanoparticles

Photocatalysis in a Packed Bed  Degradation of Organic Dyes by Immobilized Silver Nanoparticles Book
Author : Anonim
Publisher : Unknown
Release : 2015
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Graphical abstract: Highlights: Ag nanoparticles with anti-poisoning properties were synthesized and immobilized. The Ag nanoparticles are surfactant-free and have improved activity and efficiency. The Ag nanocatalysts were used in a packed bed for semi-continuous operation. Mixtures of model dyes were completely decolorized. Abstract: Complete photocatalytic degradation of methyl orange, methylene blue and rhodamine chloride was accomplished using immobilized silver nanoparticles as catalysts and tethered calix[7]hydroquinone molecules as nano-reactors. The nanoparticles were immobilized on quartz beads that were assembled in a packed bed configuration. The large interfacial area afforded by the packed bed geometry, presentation of the nanoparticles as a single, tethered layer, and the optically transparent packing material facilitated intimate interaction between the catalyst, dye solution and radiation. The degradation was accomplished using either UV or visible radiation and the nanoparticles displayed self-cleaning and anti-poisoning properties thereby demonstrating excellent durability and catalytic efficiency. The single-layer coverage of Ag nanoparticles facilitates use of very small amounts of the photocatalyst for degradation of relatively large amounts of dye. The method addresses multiple issues that constrain scale-up of photocatalytic systems that deploy nanoparticles as catalysts.

TiO2 Nanostructures for Photocatalytic Degradation of Organic Pollutants

TiO2 Nanostructures for Photocatalytic Degradation of Organic Pollutants Book
Author : Dessy Ariyanti
Publisher : Unknown
Release : 2018
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Wastewater consists of various colloidal particulates, pathogenic microorganisms, and organic pollutants. The discharge of untreated wastewater with a large quantity of organic pollutants does not only lead to the eutrophication and human health risks, but also contributes significantly to Green House Gas (GHG) emissions in the form of nitrous oxide and methane. To date, the most feasible technology in the research of organic wastewater treatment is photocatalysis using semiconductor metal oxide TiO2. By the illumination of UV light, TiO2 generate hydroxyl radicals (•OH) which can further assist the decomposition and mineralization of organic compound. Although the superiority of TiO2 among photoactive materials has been established, there are still some space related to its performance and efficiency that can be improved further such as the process optimization, morphology modification and improvement of their optical properties. In this thesis, the research mainly focuses on the application of TiO2 for organic degradation and the development of TiO2 photocatalyst, which include: (1) investigation on TiO2 photocatalysis for mixed dyes degradation in a photo-reactor (PR) and in a submerged membrane photo reactor (SMPR) and (2) investigation on the morphology modification by employing alkaline hydrothermal process and surface modification through chemical reduction to the improvements of material properties and photocatalytic activity of TiO2. The results of the study on TiO2 photocatalysis for dyes degradation in a binary system indicate that in the binary or even more complex systems, except for the degradation kinetics, the mechanism, and pathway follow those of in a single system. The reactions will eventually end up with total mineralization of organic dyes, showing the effectiveness of TiO2 photocatalysis. As the effectiveness of TiO2 photocatalysis for dyes degradation has been proven, further improvement in the TiO2 catalyst recovery obviously added more value to the process technically and economically. This is developed by integrating the photo-reactor with membrane filtration system (SMPR) for simultaneous dyes degradation and TiO2 catalyst recovery. Compared to the conventional photo-reactor, SMPR offer additional hydrodynamic force in the solution by its catalyst recovery activity that can improve photocatalytic activity up to 20%. In addition, by applying low flux (66 L/m2h), low concentration of catalyst (0.5 g/L), and aeration (1.3 L/min) can give an optimum photocatalytic performance as well as optimum membrane filtration performance. On the development of TiO2 catalyst, morphology modification via hydrothermal methods with operating condition 180oC for 20 h followed by annealing at 500oC has successfully produced TiO2 nanoribbon with dimensions 200-300 nm in width and several microns in length and possessed relatively high surface area and pore volume that improve the photocatalytic activity. This nanostructured can be used to develop multifunction membrane material for effective photocatalysis. Another important work in the TiO2 photocatalyst development is that the surface modification have been successfully introduced to pristine TiO2 via NaBH4 treatment and its concentration can be controlled by appliying different temperatures. The modified TiO2 (X300-450) has a good visible light absorption. Additionally, for the black TiO2 treated via NaBH4 reduction in 400 and 450oC, it shows low charge recombination compared to the pristine TiO2. Furthermore, in the application for dye degradation, it was found that those properties are not linear to the photocatalytic activity, as it has mainly bulk defects, which play the role of swallow traps for the electron and hole recombination, thus reducing the amount of charge migrated to the surface for photocatalytic reaction.

Handbook of Smart Photocatalytic Materials

Handbook of Smart Photocatalytic Materials Book
Author : Chaudhery Mustansar Hussain,Ajay Kumar Mishra
Publisher : Unknown
Release : 2020-02-02
ISBN : 0128190493
Language : En, Es, Fr & De

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Book Description :

Handbook of Smart Photocatalytic Materials: Environment, Energy, Emerging Applications and Sustainability provides an intriguing and useful guide to catalysis and materials. The handbook covers applications of smart photocatalytic materials for energy environmental protection and emerging fields. Also covered is the safety risk of Smart Photocatalytic Materials, commercialization, their fate and transportation in the environment, and sustainability. This volume provides a valuable roadmap, outlining common principles behind their use. Every chapter of this volume presents state-of-the-art knowledge on sustainable practices of smart photocatalytic materials (SPMs), including concepts of theory and practice. This handbook is a valued reference for both the academic and industrial researchers looking for recent developments in the field. Covers all aspects of recent developments in Environmental, Energy and Emerging applications of Smart Photocatalytic Materials Focuses on advanced applications and future research advancements of Smart Photocatalytic Materials Emphasizes the sustainability aspect of Smart Photocatalytic Materials Presents a valuable reference for researchers and students that stimulates interest in designing smart materials

Photocatalytic Materials Surfaces for Environmental Cleanup II

Photocatalytic Materials   Surfaces for Environmental Cleanup II Book
Author : Rajesh J. Tayade
Publisher : Trans Tech Publications Ltd
Release : 2012-12-27
ISBN : 3038139289
Language : En, Es, Fr & De

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Book Description :

Volume is indexed by Thomson Reuters BCI (WoS). This Special Topic Volume is a result of the collaboration of fifty six academics from the international scientific community; each an expert in his respective field of research. The work presents a thorough coverage of various photocatalytic materials and surfaces, together with their applications in environmental clean-up and hydrogen production. It offers a comprehensive picture of processes, related to photocatalysis, that have posed scientific and technological challenges in this area. One finds here the latest in-depth coverage of nanomaterials, nano-composites, and the chemical, physical and engineering aspects of photocatalytic materials application in environmental and energy applications.

Visible Light driven Photocatalytic Degradation of Rhodamine B and Industrial Dyes texbrite BAC L and Texbrite NFW L by ZnO graphene TiO2 Composite

Visible Light driven Photocatalytic Degradation of Rhodamine B and Industrial Dyes  texbrite BAC L and Texbrite NFW L  by ZnO graphene TiO2 Composite Book
Author : Anonim
Publisher : Unknown
Release : 2016
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Graphical abstract: Highlights: The ZGT ternary nanocomposite catalyst was successfully synthesized. The ZGT catalyst exhibited excellent photocatalytic activity under visible-light. The synthesized ZGT can be used as a highly effective catalyst for dye wastewaters. The prepared ZGT catalyst exhibited a highly stability and recyclability. The ZGT can be a suitable candidate for eco-friendly environmental applications. Abstract: Visible light-responsive ZnO-graphene-TiO2 (ZGT) composite catalyst was successfully synthesized via a simple solvothermal process. The intrinsic characteristics of as-obtained samples were examined using a variety of techniques including X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDS). The band gap energies of the samples were evaluated by UV–vis diffuse reflectance spectroscopy (UV-vis DRS). The photocatalytic activities of as-obtained catalysts were assessed based on the degradation of rhodamine B (RhB), texbrite BAC-L (TBAC) and texbrite NFW-L (TNFW) under visible-light irradiation. ZGT exhibited higher visible-light-activated photocatalytic activity than did other samples (ZGT (7.97 × 10 −4 min −1 ) > ZG (3.43 × 10 −4 min −1 ) > graphene (2.43 × 10 −4 min −1 ) > TiO2 (2.22 × 10 −4 min −1 ) > ZnO (1.87 × 10 −4 min −1 )). In addition, ZGT showed higher enhanced photocatalytic degradation of RhB than did other dyes (RhB (7.97 × 10 −4 min −1 ) > TNFW (5.20 × 10 −4 min −1 ) > TBAC (2.48 × 10 −4 min −1 )). It is therefore evident that the synthesized ZGT can be used as a high performance catalyst for dye wastewaters. Moreover, the detailed photocatalytic mechanism of the photodegradation process is discussed.

Photodegradation of Organic Dyes by CeO2 Bi2WO6 Nanocomposite and Its Physicochemical Properties Investigation

Photodegradation of Organic Dyes by CeO2 Bi2WO6 Nanocomposite and Its Physicochemical Properties Investigation Book
Author : Anonim
Publisher : Unknown
Release : 2016
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Abstract: The CeO2 /Bi2 WO6 nanocomposite was synthesized by coupling of precipitation and hydrothermal methods. A detailed study of the physicochemical properties of CeO2 /Bi2 WO6 nanocomposite were investigated by XRD, TEM, BET-specific surface area, UV–vis DRS, XPS, zeta potential, and PL techniques. The photocatalytic activities of CeO2 /Bi2 WO6 nanocomposite was evaluated for the degradation of methylene blue (MB), rhodamine B (RhB) and the mixed dyes of MB and RhB under visible light irradiation. The CeO2 /Bi2 WO6 nanocomposite presents excellent photocatalytic degradation of MB, RhB, and the mixed dyes of MB and RhB. The enhanced photocatalytic activity was originated from the migration efficiency of photogenerated charge carriers on the interface of CeO2 and Bi2 WO6 . Moreover, the active species trapping experiments demonstrated holes (h + ) and hydroxyl radical (OH ⋅ ) were major active species in the degradation of RhB and MB, respectively. Herein, we also investigate the produced hydroxyl radical as a main oxidant in photocatalysis process for improving photocatalytic performance. Moreover, the CeO2 /Bi2 WO6 nanocomposites shows excellent cycle stability toward continuous five cycles runs of photocatalytic experiment for dyes degradation. The possible photocatalytic mechanism of CeO2 /Bi2 WO6 nanocomposite was described.

Synthesis Characterization and Photocatalytic Activity of N doped Carbonaceous Material Derived from Cellulose in Textile Dye Remediation

Synthesis  Characterization  and Photocatalytic Activity of N doped Carbonaceous Material Derived from Cellulose in Textile Dye Remediation Book
Author : Anonim
Publisher : Unknown
Release : 2017
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Graphical abstract: Highlights: N-doped carbonaceous material of microcrystalline cellulose and urea was prepared. The material was used in textile dye remediation via photocatalytic oxidation. The material was highly efficient towards dye degradation under visible light. The cellulose-derived material was recycled for multiple uses in dye remediation. The mechanism of degradation and role of oxygen and radical quenchers are proposed. Abstract: N-doped carbonaceous materials were synthesized by pyrolysis of microcrystalline cellulose and urea at 900 °C. The pyrolyzed materials were characterized via SEM, XPS, STEM/EDX, and FT/IR. Microscopy images revealed wrinkled sheet-like morphology with stacked graphitic layers, and elemental analyses confirmed 7.74% nitrogen content, which was evenly distributed throughout the material. The characteristic peaks of CN and CN bonds in FT/IR indicated N-atom incorporation in the material. The catalytic experiment with alcian blue 8Gx dye under visible light showed higher degradation than in dark, which illustrated the photocatalytic nature of the material. The pH conditions and material ratios were optimized during the photocatalytic experiments. Various dyes were subjected to degradation photocatalytically using the materials at pH 5.5 and recyclability studies indicated multi-cycle use of the material. Additionally, kinetic studies of the photocatalytic degradation of indigo carmine showed that the disappearance of the dye followed a first-order kinetics. The significance of adsorption phenomena in the process of degradation was established by comparing the adsorption constant (KLH = 0.898 L mg −1 ) calculated using the Langmuir-Hinshelwood model with that calculated based on the adsorption isotherm model (KL = 0.2457 L mg −1 ). Degradation products were characterized via various analytical techniques, including GC–MS, ion chromatography, FT/IR, and total organic carbon analyses. Furthermore, the role of oxygen and radical quenchers were studied and it was found that the main species responsible for dye degradation was hydroxyl radical. N-doping of cellulose via a simple pyrolysis method has therefore been proven to be effective in development of photocatalytic materials for pollutant mitigation.

Nanomaterials for Air Remediation

Nanomaterials for Air Remediation Book
Author : Abdeltif Amrane,Aymen Amine Assadi,Phuong Nguyen-Tri,Tuán Anh Nguyen,Sami Rtimi
Publisher : Micro and Nano Technologies
Release : 2020-01-17
ISBN : 0128188219
Language : En, Es, Fr & De

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Book Description :

Nanomaterials for Air Remediation provides a comprehensive description of basic knowledge and current research progress in the field of air treatment using nanomaterials. The book explores how nanomaterials are used in various air remediation techniques, including advanced oxidation processes, biological processes, and filtration. It also covers their combined use as nanocatalysts, nanoantibiotics, nanoadsorbents, nanocontainers, nanofiltrations and nanosensors. Major challenges to using nanomaterials for improving air quality on a mass scale, both practical and regulatory, are also presented. This is an important resource for materials scientists and environmental engineers who are looking to understand how nanotechnology is used to enhance air quality. Includes coverage of a wide range of nanomaterials, from biochemical to chemical materials, and nanomaterials supported photocatalysts Discusses how the properties of nanomaterials are being used to make more efficient air purification systems and products Assesses the practical and regulatory challenges of using different types of nanomaterials for air remediation

Water Pollution and Remediation Photocatalysis

Water Pollution and Remediation  Photocatalysis Book
Author : Inamuddin
Publisher : Springer Nature
Release : 2021-04-16
ISBN : 303054723X
Language : En, Es, Fr & De

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Book Description :

Download Water Pollution and Remediation Photocatalysis book written by Inamuddin, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Surface Science of Photocatalysis

Surface Science of Photocatalysis Book
Author : Jiaguo Yu,Mietek Jaroniec,Chuanjia Jiang
Publisher : Academic Press
Release : 2020-02-02
ISBN : 0081028903
Language : En, Es, Fr & De

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Book Description :

Surface Science of Photocatalysis, Volume 32, summarizes significant findings on the surface science behind various classic and novel photocatalysts for energy and environmental applications, with special emphasis on important surface/interface processes in photocatalysis, such as interfacial charge transfer, function of co-catalysts, and adsorption over photocatalyst surface. This book timely and systematically reviews the state-of-the-art of the surface science in semiconductor-based photocatalysis, serving as a useful reference book for both new and experienced researchers in this field.

Photocatalysis

Photocatalysis Book
Author : Jinlong Zhang,Baozhu Tian,Lingzhi Wang,Mingyang Xing,Juying Lei
Publisher : Springer
Release : 2018-10-11
ISBN : 9811321132
Language : En, Es, Fr & De

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Book Description :

This book describes the photocatalytic mechanism, factors affecting photocatalytic activity, design and preparation of different kinds of nanostructured photocatalysts, and their applications in the environmental and energy fields. Further, it illustrates a broad range of modification methods including ion-doping, heterojunction, noble metal deposition, morphological control and sensitizations, which are used to extend the light absorption range of photocatalysts and reduce recombination between electrons and holes. Promising applications include water splitting, contaminant decomposition and photocatalytic reduction of CO2, which are closely related to environmental redemption and new energy development. The book offers an intriguing and useful guide for a broad readership in various fields of catalysis, material sciences, environment and energy.

Photocatalysts in Advanced Oxidation Processes for Wastewater Treatment

Photocatalysts in Advanced Oxidation Processes for Wastewater Treatment Book
Author : Sadanand Pandey,Suprakas Sinha Ray
Publisher : John Wiley & Sons
Release : 2020-06-03
ISBN : 1119631394
Language : En, Es, Fr & De

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Book Description :

Photocatalysts in Advanced Oxidation Processes for Wastewater Treatment comprehensively covers a range of topics aiming to promote the implementation of photocatalysis at large scale through provision of facile and green methods for catalysts synthesis and elucidation of pollutants degradation mechanisms. This book is divided into two main parts namely “Synthesis of effective photocatalysts” (Part I) and “Mechanisms of the photocatalytic degradation of various pollutants” (Part II). The first part focuses on the exploration of various strategies to synthesize sustainable and effective photocatalysts. The second part of the book provides an insights into the photocatalytic degradation mechanisms and pathways under ultraviolet and visible light irradiation, as well as the challenges faced by this technology and its future prospects.

Organic Pollutants in Wastewater I

Organic Pollutants in Wastewater I Book
Author : Inamuddin
Publisher : Materials Research Forum LLC
Release : 2018-04-01
ISBN : 194529163X
Language : En, Es, Fr & De

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Book Description :

Wastewater represents an alternative to freshwater if it can be treated successfully for re-use applications. Promising techniques involve photocatalysis, adsorption, nanocomposites, and membranes. The book focusses on the following topics: Effluent detoxification and degradation kinetics of organic dyes using Fenton and photo-Fenton processes. Degradation of methylene blue using nanocomposites as a potential photocatalyst. Agricultural and agro-industries based wastes as low-cost biosorbents. Use of carbon quantum dots (CQDs) for photocatalytic degradation of organic pollutants. Detection, determination and removal of phenolic compounds from wastewater. Decomposition of organic dyes via photocatalysis. Oxide-semiconductor nanomaterials for photocatalytic wastewater purification. Photocatalytic efficiency of various ZnO composites for degradation of organic pollutants. TiO2 based nanocomposites. Membrane filtration processes for the removal of organics from industrial wastewater.

Journal of the Indian Chemical Society

Journal of the Indian Chemical Society Book
Author : Anonim
Publisher : Unknown
Release : 2012
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Download Journal of the Indian Chemical Society book written by , available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

Journal of Scientific Industrial Research

Journal of Scientific   Industrial Research Book
Author : Anonim
Publisher : Unknown
Release : 2003
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Download Journal of Scientific Industrial Research book written by , available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

SOUVENIR of 4th International Science Congress

SOUVENIR of 4th International Science Congress Book
Author : Prof. Dipak Sharma
Publisher : International E Publication
Release : 2021-04-16
ISBN : 9383520272
Language : En, Es, Fr & De

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Book Description :

Download SOUVENIR of 4th International Science Congress book written by Prof. Dipak Sharma, available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.