The Photocatalytic and Antibacterial Activity of Copper-doped Titanium Dioxide Nanoparticles PDF Download
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Author: Naizhen Yu
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Organic pollutants and pathogenic microbes exist in water systems causing many communities, especially in developing countries, to have a high risk of infection with water-borne diseases. Developing a simple, cost-effective, and efficient sunlight-driven water treatment technology is crucial for people to access clean and safe water. The most widely studied photoactive and antibacterial material is titanium dioxide (TiO2) nanoparticles (NPs). TiO2 NPs can produce highly reactive free radicals to oxidize organic pollutants and deactivate biological pollutants. However, pristine TiO2 NPs have a large band gap and only harvest solar radiation in the UV region. This thesis focuses on developing copper-doped titanium dioxide (TiCuxO2) catalysts and exploring its photocatalytic activity in the visible-light region. The first project focuses on synthesizing Cu-doped white TiO2 (wTiCuxO2) NPs using the solvothermal approach. The second project is a comprehensive study on Cu-doped black TiO2 (bTiCuxO2) NPs. The photocatalytic performance of the resulting TiCuxO2 catalysts (white and black particles) were evaluated using degradation of Rhodamine B (RhB) dye and disinfection of Escherichia coli (E. coli) under visible light irradiation. We show that introducing a Cu dopant and surface defects on the catalysts enhances its photodegradation ability. The mechanism of increased photocatalytic activity for TiCuxO2 is hypothesized to be due to band gap narrowing and accelerated charge separation. For disinfection ability, the activity might be related to the free Cu ions increasing the radical species under irradiation. In the project, I have developed two efficient photocatalysts for water treatment; the mechanistic studies of the nano-catalysts increase our understanding of the heterogeneous catalysts for photo-degradation of industrial dyes and inactivation of waterborne microbes, which are useful for engineering more efficient and sustainable water treatment devices.
Author: Naizhen Yu
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Organic pollutants and pathogenic microbes exist in water systems causing many communities, especially in developing countries, to have a high risk of infection with water-borne diseases. Developing a simple, cost-effective, and efficient sunlight-driven water treatment technology is crucial for people to access clean and safe water. The most widely studied photoactive and antibacterial material is titanium dioxide (TiO2) nanoparticles (NPs). TiO2 NPs can produce highly reactive free radicals to oxidize organic pollutants and deactivate biological pollutants. However, pristine TiO2 NPs have a large band gap and only harvest solar radiation in the UV region. This thesis focuses on developing copper-doped titanium dioxide (TiCuxO2) catalysts and exploring its photocatalytic activity in the visible-light region. The first project focuses on synthesizing Cu-doped white TiO2 (wTiCuxO2) NPs using the solvothermal approach. The second project is a comprehensive study on Cu-doped black TiO2 (bTiCuxO2) NPs. The photocatalytic performance of the resulting TiCuxO2 catalysts (white and black particles) were evaluated using degradation of Rhodamine B (RhB) dye and disinfection of Escherichia coli (E. coli) under visible light irradiation. We show that introducing a Cu dopant and surface defects on the catalysts enhances its photodegradation ability. The mechanism of increased photocatalytic activity for TiCuxO2 is hypothesized to be due to band gap narrowing and accelerated charge separation. For disinfection ability, the activity might be related to the free Cu ions increasing the radical species under irradiation. In the project, I have developed two efficient photocatalysts for water treatment; the mechanistic studies of the nano-catalysts increase our understanding of the heterogeneous catalysts for photo-degradation of industrial dyes and inactivation of waterborne microbes, which are useful for engineering more efficient and sustainable water treatment devices.
Author: Sheng Yau Leong
Publisher:
ISBN:
Category : Process control
Languages : en
Pages : 44
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Book Description
Titanium dioxide (TiO2) is best known for its inexpensiveness and highly available as a photocatalyst. However, due to its wide-bandgap of 3.2 eV and the fast recombination of electron-hole pair, they have contributed to the inability to use the sunlight sufficiently as well as hindering for any reaction to happen. The objectives of the title are to synthesize a copper (Cu) doped TiO2, to inspect the photocatalytic activity of the synthesized TiO2 and to study the kinetic of the degradation of methylene blue (MB). A Cu salt is first synthesized using copper nitrate (Cu(NO3)) mixed in the glycerol phase. The preparation of TiO2 was carried out by the sol-gel method and the resulted Cu salt is added into it to in a 10 wt.% Cu/TiO2 manner. The resulted gel was aged for a day before it was heated up in the oven for 24 hours, which resulted in powder form. It was grinded and calcinated at 300 oC for an hour. The photocatalytic activity of the synthesized catalyst was inspected with the degradation of methylene blue (MB). As a result, the photocatalytic activity had been increased and the K0 ((k0H/K0)+ k0 is 0.03236 mg L-1 min-1 while K0 is 9.32615 X 10-3 4L mg-1.
Author: Akira Fujishima
Publisher:
ISBN: 9784939051036
Category : Photocatalysis
Languages : en
Pages : 176
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Book Description
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: Nicola Cioffi
Publisher: Springer Science & Business Media
ISBN: 3642244270
Category : Technology & Engineering
Languages : en
Pages : 563
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Book Description
There is a high demand for antimicrobials for the treatment of new and emerging microbial diseases. In particular, microbes developing multidrug resistance have created a pressing need to search for a new generation of antimicrobial agents, which are effective, safe and can be used for the cure of multidrug-resistant microbial infections. Nano-antimicrobials offer effective solutions for these challenges; the details of these new technologies are presented here. The book includes chapters by an international team of experts. Chemical, physical, electrochemical, photochemical and mechanical methods of synthesis are covered. Moreover, biological synthesis using microbes, an option that is both eco-friendly and economically viable, is presented. The antimicrobial potential of different nanoparticles is also covered, bioactivity mechanisms are elaborated on, and several applications are reviewed in separate sections. Lastly, the toxicology of nano-antimicrobials is briefly assessed.
Author: Mohamed A. Barakat
Publisher: Springer
ISBN: 3319242717
Category : Science
Languages : en
Pages : 39
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Book Description
In this brief, a comprehensive review of the UV/visible-TiO2 photocatalytic oxidation process is presented with an insight into the mechanisms involved, the role of titanium dioxide as a catalyst, irradiation sources, types of reactors, and a comparison between various modes of TiO2 application. An overview of the development and enhancement of the activity of TiO2 nanoparticles in photocatalysis is presented. The topics covered include a detailed look at the unique properties of the TiO2 nanoparticles and their relationship to photocatalytic properties. The utilization of the TiO2 nanoparticles as photocatalysts, in the non-doped and doped forms is also reviewed. Finally, the use of modified TiO2 nanoparticles has made a significant contribution in providing definitive mechanistic information regarding the visible light photocatalytic processes.
Author: Atsile Rosy Ocwelwang
Publisher:
ISBN:
Category : Chitosan
Languages : en
Pages : 190
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Book Description
Author: Sher Bahadar Khan
Publisher: BoD – Books on Demand
ISBN: 178985475X
Category : Science
Languages : en
Pages : 158
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Book Description
This book enlightens the type, chemical structure, and application of photo-catalysts. It covers the recent developments in photo-catalysts and their applications, particularly in photo-catalytic degradation of different organic pollutants, hydrogen production, etc. It provides a concise but complete coverage and overview of photocatalysts and their recent advances for a broad audience: beginners, graduate students, and specialists in both academic and industrial sectors.
Author: Mario J. Muñoz-Batista
Publisher: Springer Nature
ISBN: 3030494926
Category : Science
Languages : en
Pages : 301
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Book Description
The series Topics in Current Chemistry Collections presents critical reviews from the journal Topics in Current Chemistry organized in topical volumes. The scope of coverage is all areas of chemical science including the interfaces with related disciplines such as biology, medicine and materials science. The goal of each thematic volume is to give the non-specialist reader, whether in academia or industry, a comprehensive insight into an area where new research is emerging which is of interest to a larger scientific audience. Each review within the volume critically surveys one aspect of that topic and places it within the context of the volume as a whole. The most significant developments of the last 5 to 10 years are presented using selected examples to illustrate the principles discussed. The coverage is not intended to be an exhaustive summary of the field or include large quantities of data, but should rather be conceptual, concentrating on the methodological thinking that will allow the non-specialist reader to understand the information presented. Contributions also offer an outlook on potential future developments in the field. The chapter "Mechanochemical Forces as a Synthetic Tool for Zero and One-Dimensional Titanium Oxide-Based Nano-photocatalysts" is available open access under a CC BY 4.0 License via link.springer.com.
Author: Vladimiro Dal Santo
Publisher: MDPI
ISBN: 3038976946
Category : Science
Languages : en
Pages : 208
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Book Description
Although the seminal work of Fujishima et al. dates back to 1971, TiO2 still remains the most diffused and studied semiconductor, employed in photo-oxidation processes for cleantech (i.e., polluted water and air treatment), in solar fuel production (mainly hydrogen production by water photo splitting), and in Carbon Capture and Utilization (CCU) processes by CO2 photoreduction. The eleven articles, among them three reviews, in this book cover recent results and research trends of various aspects of titanium dioxide photocatalysis, with the chief aim of improving the final efficiency of TiO2-based materials. Strategies include doping, metal co-catalyst deposition, and the realization of composites with plasmonic materials, other semiconductors, and graphene. Photocatalysts with high efficiency and selectivity can be also obtained by controlling the precise crystal shape (and homogeneous size) and the organization in superstructures from ultrathin films to hierarchical nanostructures. Finally, the theoretical modeling of TiO2 nanoparticles is discussed and highlighted. The range of topics addressed in this book will stimulate the reader’s interest as well as provide a valuable source of information for researchers in academia and industry.
