Photodegradation of Diuron on Titania and Zinc Oxide PDF Download
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Author:
Publisher:
ISBN:
Category : Diuron
Languages : en
Pages : 300
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Book Description
Photocatalytic degradation of diuron was investigated in the presence of zinc oxide and titanium dioxide as photocatalysts. The photocatalysts were synthesized via sol-gel method with an addition of ammonia at the content of 0%, 7%, and 28% by mass. The powder obtained was characterized by various techniques. The photocatalytic degradation of 10 ppm diuron aqueous solution was conducted in a batch photo-reactor. The solution was periodically sampled to monitor the concentration of diuron via HPLC. The decrease of total organic carbon as a result of mineralization of diuron was also observed during the degradation process. It is found that the activity of photocatalysts increase when the ammonia content is increased. Zinc oxide has higher performance in degradation and mineralization of diuron than titanium dioxide, regardless of much lower surface area. The degradation of diuron on zinc oxide is about 98% within 6 hours, while that achieved on titanium dioxide is only 45%. The degradation generated several intermediates. The intermediates species were identified by LC-MS. Degradation of diuron produces different degradation products depending on pH of the solution, wavelength of UV-radiation, and type of photocatalyst. Several degradation intermediates are generated by reactions of hydroxyl radical attacking to several sites of diuron structure during the photocatalytic degradation process.
Author:
Publisher:
ISBN:
Category : Diuron
Languages : en
Pages : 300
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Book Description
Photocatalytic degradation of diuron was investigated in the presence of zinc oxide and titanium dioxide as photocatalysts. The photocatalysts were synthesized via sol-gel method with an addition of ammonia at the content of 0%, 7%, and 28% by mass. The powder obtained was characterized by various techniques. The photocatalytic degradation of 10 ppm diuron aqueous solution was conducted in a batch photo-reactor. The solution was periodically sampled to monitor the concentration of diuron via HPLC. The decrease of total organic carbon as a result of mineralization of diuron was also observed during the degradation process. It is found that the activity of photocatalysts increase when the ammonia content is increased. Zinc oxide has higher performance in degradation and mineralization of diuron than titanium dioxide, regardless of much lower surface area. The degradation of diuron on zinc oxide is about 98% within 6 hours, while that achieved on titanium dioxide is only 45%. The degradation generated several intermediates. The intermediates species were identified by LC-MS. Degradation of diuron produces different degradation products depending on pH of the solution, wavelength of UV-radiation, and type of photocatalyst. Several degradation intermediates are generated by reactions of hydroxyl radical attacking to several sites of diuron structure during the photocatalytic degradation process.
Author:
Publisher:
ISBN:
Category : Titanium
Languages : en
Pages : 232
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Book Description
Degradation of linuron (N-(3, 4-dichlorophenyl)-N'-methoxy-N'-methylurea), which is a harmful phenylurea herbicide commonly found as residue in water , was conducted via heterogeneous photocatalysis on commercial and synthesized titanium dioxide (TiO2) and commercial and synthesized zinc oxide (ZnO). Nanoparticles of the photocatalysts were synthesized via the sol-gel method. The photocatalytic degradation of 10-ppm linuron aqueous solution was conducted in a batch photo-reactor. Concentration of linuron was periodically monitored using high performance liquid chromatography (HPLC) with 254-nm UV detector. The decrease of total organic carbon as a result of mineralization of linuron was also observed during the degradation process.
Author: Suresh C. Ameta
Publisher: CRC Press
ISBN: 1000932648
Category : Science
Languages : en
Pages : 557
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Book Description
Specific topics include: eco-friendly products green catalysts ionic liquids supercritical fluids green solvents photo-Fenton reaction photocatalysis sonochemistry microwave-assisted organic synthesis ultrasound-assisted reactions green composites green manufacturing processes
Author: Sushma Dave
Publisher: Springer Nature
ISBN: 303108991X
Category : Technology & Engineering
Languages : en
Pages : 287
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Book Description
This book looks at the recent developments in the area of photocatalytic degradation of dyes using photocatalytic techniques, for example by means of various nanoparticles, heterogeneous, and hybrid systems. Dyes are one of the major groups of water pollutants and are widely used in a diverse range of industries. The toxic effects of organic dyes in wastewater can have a great environmental impact, therefore there is significant interest and need to remove these dyes effectively and efficiently during wastewater treatment. This volume covers a plethora of basics on the photochemistry of dyes and provides information on technological perspectives including reactor designs and process intensification. Since many industries release a significant amount of colored effluents, which are toxic and difficult to remove by conventional methods, the comprehensive studies herein will contribute to helping reduce the impact of colored effluents in wastewater on the environment.
Author: Rungthip Noisomran
Publisher:
ISBN:
Category : Diuron
Languages : en
Pages : 220
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Book Description
Author:
Publisher: Elsevier
ISBN: 0128133589
Category : Technology & Engineering
Languages : en
Pages : 612
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Book Description
Colloidal Metal Oxide Nanoparticles: Synthesis, Characterization and Applications is a one-stop reference for anyone with an interest in the fundamentals, synthesis and applications of this interesting materials system. The book presents a simple, effective and detailed discussion on colloidal metal oxide nanoparticles. It begins with a general introduction of colloidal metal oxide nanoparticles, then delves into the most relevant synthesis pathways, stabilization procedures, and synthesis and characterization techniques. Final sections discuss promising applications, including bioimaging, biosensing, diagnostic, and energy applications—i.e., solar cells, supercapacitors and environment applications—i.e., the treatment of contaminated soil, water purification and waste remediation. - Provides the most comprehensive resource on the topic, from fundamentals, to synthesis and characterization techniques - Presents key applications, including biomedical, energy, electronic and environmental - Discusses the most relevant techniques for synthesis, patterning and characterization
Author: Mariami Alisa Sharifuddin
Publisher:
ISBN:
Category :
Languages : en
Pages : 58
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Book Description
Author: Inamuddin
Publisher: Springer Nature
ISBN: 303054723X
Category : Science
Languages : en
Pages : 443
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Book Description
In the context of climate change and fossil fuel pollution, solar energy appears as a cheap and sustainable fuel for many environmental applications, yet the efficiency of techniques has to be improved. This book reviews recent methods and applications of photocatalysis for the treatment of wastewater containing bacteria, heavy metals, organic pollutants, dyes and tannery effluents. Basics of water pollution, polluted river ecosystems and membranes are also detailed.
Author: Aiguo Wu
Publisher: John Wiley & Sons
ISBN: 3527347240
Category : Science
Languages : en
Pages : 252
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Book Description
A unique book that summarizes the properties, toxicology, and biomedical applications of TiO2-based nanoparticles Nanotechnology is becoming increasingly important for products used in our daily lives. Nanometer-sized titanium dioxide (TiO2) are widely used in industry for different purposes, such as painting, sunscreen, printing, cosmetics, biomedicine, and so on. This book summarizes the advances of TiO2 based nanobiotechnology and nanomedicine, covering materials properties, toxicological research, and biomedical application, such as antibacter, biosensing, and cancer theranostics. It uniquely integrates the TiO2 applications from physical properties, toxicology to various biomedical applications, and includes black TiO2 based cancer theranostics. Beginning with a comprehensive introduction to the properties and applications of nanoparticles, TiO2 Nanoparticles: Applications in Nanobiotechnology, Theranostics and Nanomedicine offers chapters on: Toxicity of TiO2 Nanoparticles; Antibacterial Applications of TiO2 Nanoparticles; Surface Enhanced Raman Spectrum of TiO2 Nanoparticle for Biosensing (TiO2 Nanoparticle Served as SERS Sensing Substrate); TiO2 as Inorganic Photosensitizer for Photodynamic Therapy; Cancer Theranostics of Black TiO2 Nanoparticles; and Neurodegenerative Disease Diagnostics and Therapy of TiO2-Based Nanoparticles. This title: -Blends the physical properties, toxicology of TiO2 nanoparticles to the many biomedical applications -Includes black TiO2 based cancer theranostics in its coverage -Appeals to a broad audience of researchers in academia and industry working on nanomaterials-based biosensing, drug delivery, nanomedicine TiO2 Nanoparticles: Applications in Nanobiotechnology, Theranostics and Nanomedicine is an ideal book for medicinal chemists, analytical chemists, biochemists, materials scientists, toxicologists, and those in the pharmaceutical industry.
Author: Umar Ibrahim Gaya
Publisher: Springer Science & Business Media
ISBN: 9400777752
Category : Science
Languages : en
Pages : 222
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Book Description
This book underscores the essential principles of photocatalysis and provides an update on its scientific foundations, research advances, and current opinions, and interpretations. It consists of an introduction to the concepts that form the backbone of photocatalysis, from the principles of solid-state chemistry and physics to the role of reactive oxidizing species. Having recognised the organic link with chemical kinetics, part of the book describes kinetic concepts as they apply to photocatalysis. The dependence of rate on the reaction conditions and parameters is detailed, the retrospective and prospective aspects of the mechanism of photocatalysis are highlighted, and the adsorption models, photocatalytic rate expressions, and kinetic disguises are examined. This book also discusses the structure, property, and activity relationship of prototypical semiconductor photocatalysts and reviews how to extend their spectral absorption to the visible region to enable the effective use of visible solar spectrum. Lastly, it presents strategies for deriving substantially improved photoactivity from semiconductor materials to support the latest applications and potential trends.
