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"photocatalysis"
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Solar photocatalysis for environmental remediation
The book presents a review of research and pilot-scale efforts undertaken by scientists all over the world towards utilization of solar energy for environmental remediation. It gives a complete account of the solar photocatalytic degradation of pollutants present in wastewater and atmosphere and also discusses the solid-phase photocatalytic degradation of plastics in the form of composite. The text further describes the hydrogen generation by photocatalytic water splitting. Various solar collectors and reactors used especially for environmental remediation are also elucidated.
Book
The Photocatalytic Kinetics of the Methyl Orange Degradation in the Aqueous Suspension of Irradiated TiO2
Background: In the present study, the photocatalytic (TiO2/UV) batch process has been used for the methyl orange (MO) degradation. Methods: In the catalyst range from 0.25 to 1.5 g/L, the optimum concentration of TiO2 was found to be 0.5 g/L. The kinetic behavior of MO degradation has been evaluated using the non-linear form of pseudo-first order and pseudo-second order models. Results: The goodness of the fit was evaluated using the correlation coefficient R2 value and the mean square error (MSE) function. Conclusion: The kinetic studies revealed that the pseudo-first order model (k1 = -0.0593 min-1) is more suitable to fit the experimental data (R2 = 0.957, MSE = 0.00271) of MO degradation.
Journal Article
Nanomaterials for photocatalytic chemistry
\"This book concentrates on the emerging area of the utilization of (solar) photon energy for catalyzing useful chemical reactions (also called artificial photosynthesis) including water splitting, CO2 reduction, selective epoxidation, selective alcohol oxidation, coupling reactions, etc. The chapters in this book cover topics ranging from materials design at nanometer scale to nanomaterials synthesis to photocatalytically chemical conversion. This book can serve as a useful reference for those new to this field of research or already engaged in it, from graduate students to postdoctoral fellows and practicing researchers\"-- Provided by publisher.
Book
Photocatalytic and antibacterial properties of carbonaceous materials coupled NiO nanocomposites
The photocatalytic and antibacterial characteristics of pure NiO (NO), GO, and rGO integrated NiO (GNO and rNO) nanoparticles have been compared in this work. Through the process of chemical precipitation, NO and GNO NPs were created. Through the use of Centella asiatica leaf extract to reduce graphene oxide to rGO, rNO NC was produced utilizing one-pot green synthesis technique. The cubic crystal structure of all the samples shows a clear preferential growth along the (2 0 0) direction. Graphene oxide and reduced graphene oxide blending have a detrimental effect on the crystalline quality of NO. Reduced band gaps for the GNO and rNO samples were observed resulting from charge delocalization from electronic interaction between NiOand GO/rGO. The degradation efficiencies of NO, GNO and rNO catalysts were 78, 83 and and 92 %,respectively against rhodamine B after 100 min of light irradiation. The antibacterial properties of NO, GNO, and rNO NPs are differentiated by their size and ability to generate reactive oxygen species. Due to decreased crystallite size more ROS are generated for rNO and hence enhanced antibacterial potency has been realized.
Journal Article
Recent developments in enantioselective photocatalysis
Enantioselective photocatalysis has rapidly grown into a powerful tool for synthetic chemists. This review describes the various strategies for creating enantioenriched products through merging enantioselective catalysis and photocatalysis, with a focus on the most recent developments and a particular interest in the proposed mechanisms for each. With the aim of understanding the scope of each strategy, to help guide and inspire further innovation in this field.
Journal Article
Solar hydrogen generation : transition metal oxides in water photoelectrolysis
\"Expert techniques for extracting hydrogen from water using transition metal oxides as catalysts Solar Hydrogen Generation details the complex process of separating hydrogen from oxygen--photoelectrolysis. This book comprehensively covers the chemical characteristics of transition metal oxides, explaining how to covert solar energy to electron energy through transition metal oxides. Past experimentations and future directions are discussed. Solar Hydrogen Generation Comprehensively reviews physical characteristics of transition metal oxides both in electrochemical and photocatalytic applications Includes history and future prospects for water photoelectrolysis Reviews state-of-the-art achievements in the fields of condensed matter physics, nanostructured material science, electrochemistry, and photocatalysis Addresses potential problems and solutions In-depth coverage: Hydrogen Production; Electrochemistry and Photoelectrolysis; Transition Metal Oxides; Molecular Structure, Crystal Structure, and Electronic Structure; Optical Properties and Light Absorption; Bandgap, Band Edge, and Engineering; Impurity, Dopants, and Defects; Photocatalytic Reactions, Oxidation and Reduction; Organic and Inorganic Systems; Surface and Interface Chemistry; Nanostructured and Morphology; Synchrotron Radiation and Soft X-Ray Spectroscopy\"--Provided by publisher.
Book
Heterojunction photocatalysts for degradation of the tetracycline antibiotic: a review
Antibiotic pollution is a major health issue inducing antibiotic resistance and the inefficiency of actual drugs, thus calling for improved methods to clean water and wastewater. Here we review the recent development of heterojunction photocatalysis and application in degrading tetracycline. We discuss mechanisms for separating photogenerated electron–hole pairs in different heterojunction systems such as traditional, p–n, direct Z-scheme, step-scheme, Schottky, and surface heterojunction. Degradation pathways of tetracycline during photocatalysis are presented. We compare the efficiency of tetracycline removal by various heterojunctions using quantum efficiency, space time yield, and figures of merit. Implications for the treatment of antibiotic-contaminated wastewater are discussed.
Journal Article
Photocatalytic Dye Degradation Using Green Polymeric-Based Nanostructures
This comprehensive book investigates the doping influence of green biopolymers on metal, metal oxide, and metal sulphide nanomaterials being employed as photocatalysts in the process of water purification.
eBook
Constructing a Visible-Active CoFesub.2Osub.4@Bisub.2Osub.3/NiO Nanoheterojunction as Magnetically Recoverable Photocatalyst with Boosted Ofloxacin Degradation Efficiency
Constructing visible-light-active Z-scheme heterojunctions has proven fruitful in enhancing the photocatalytic activity of photocatalysts for superior water clean-up. Herein, we report the fabrication of a CoFe[sub.2] O[sub.4] @Bi[sub.2] O[sub.3] /NiO (CBN) Z-scheme nanoheterojunction. The obtained CBN heterojunction was used for visible-light-assisted degradation of ofloxacin (OFL) in water. The OFL degradation efficiency achieved by the CBN heterojunction was 95.2% in 90 min with a rate constant of kapp = 0.03316 min[sup.−1] , which was about eight times that of NiO and thirty times that of CoFe[sub.2] O[sub.4] . The photocatalytic activity of a Bi[sub.2] O[sub.3] /NiO Z-scheme heterojunction was greatly enhanced by the visible activity and redox mediator effect of the cobalt ferrite co-catalyst. Higher charge-carrier separation, more visible-light capture, and the Z-scheme mechanism in the Z-scheme system were the important reasons for the high performance of CBN. The scavenging experiments suggested [sup.●] O[sub.2] [sup.−] as an active species for superior OFL degradation. The possible OFL degradation pathway was predicted based on LC-MS findings of degradation intermediate products. The magnetic nature of the CBN helped in the recovery of the catalyst after reuse for six cycles. This work provides new insights into designing oxide-based heterojunctions with high visible-light activity, magnetic character, and high redox capabilities for potential practical applications in environmental treatment.
Journal Article