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Miah MH, Khandaker MU, Rahman MB, Nur-E-Alam M, Islam MA. Band gap tuning of perovskite solar cells for enhancing the efficiency and stability: issues and prospects. RSC Adv 2024; 14:15876-15906. [PMID: 38756852 PMCID: PMC11097048 DOI: 10.1039/d4ra01640h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Accepted: 04/27/2024] [Indexed: 05/18/2024] Open
Abstract
The intriguing optoelectronic properties, diverse applications, and facile fabrication techniques of perovskite materials have garnered substantial research interest worldwide. Their outstanding performance in solar cell applications and excellent efficiency at the lab scale have already been proven. However, owing to their low stability, the widespread manufacturing of perovskite solar cells (PSCs) for commercialization is still far off. Several instability factors of PSCs, including the intrinsic and extrinsic instability of perovskite materials, have already been identified, and a variety of approaches have been adopted to improve the material quality, stability, and efficiency of PSCs. In this review, we have comprehensively presented the significance of band gap tuning in achieving both high-performance and high-stability PSCs in the presence of various degradation factors. By investigating the mechanisms of band gap engineering, we have highlighted its pivotal role in optimizing PSCs for improved efficiency and resilience.
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Affiliation(s)
- Md Helal Miah
- Applied Physics and Radiation Technologies Group, CCDCU, School of Engineering and Technology, Sunway University 47500 Bandar Sunway Selangor Malaysia
- Department of Physics, Bangabandhu Sheikh Mujibur Rahman Science and Technology University Gopalganj-8100 Bangladesh
| | - Mayeen Uddin Khandaker
- Applied Physics and Radiation Technologies Group, CCDCU, School of Engineering and Technology, Sunway University 47500 Bandar Sunway Selangor Malaysia
- Faculty of Graduate Studies, Daffodil International University Daffodil Smart City, Birulia, Savar Dhaka-1216 Bangladesh
| | - Md Bulu Rahman
- Department of Physics, Bangabandhu Sheikh Mujibur Rahman Science and Technology University Gopalganj-8100 Bangladesh
| | - Mohammad Nur-E-Alam
- Institute of Sustainable Energy, Universiti Tenaga Nasional Jalan IKRAM-UNITEN Kajang 43000 Selangor Malaysia
- School of Science, Edith Cowan University 270 Joondalup Drive Joondalup-6027 WA Australia
| | - Mohammad Aminul Islam
- Department of Electrical Engineering, Faculty of Engineering, Universiti Malaya, Jalan Universiti 50603 Kuala Lumpur Malaysia
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2
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Kanmani S, Dileepan AGB. Treatment of landfill leachate using photocatalytic based advanced oxidation process - a critical review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118794. [PMID: 37619385 DOI: 10.1016/j.jenvman.2023.118794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 06/30/2023] [Accepted: 08/09/2023] [Indexed: 08/26/2023]
Abstract
Landfill leachate is a discrete volumetric component of municipal solid waste; hence, researchers and professionals are more concerned about it because of its obscurity. Innovative treatment and emerging technologies are being scrutinized to address the treatment of landfill leachate challenges. The leading target of this review was to examine the possibility of removing recalcitrant organic pollutants from landfill leachate by photocatalytic-based advanced oxidation processes. A summary of the systematic applicability of conventional treatment for landfill leachate is provided, with a focus on physico-chemical and biological processes. The biological treatment, such as aerobic and anaerobic digestion, is an excellent technique for treating highly concentrated organic pollutants in the wastewater. However, Leachate can scarcely be treated using conventional techniques since it is enriched with refractory organics and inorganic ions. It is clear from the literature review that none of the available combinations of physico-chemical and biological treatments are entirely relevant for the removal of recalcitrant organic pollutants from leachate. Recently, the photo-assisted TiO2/ZnO oxidation has shown an excessively potential and feasible way to treat landfill leachate. TiO2/ZnO photocatalysis is currently developing to treat recalcitrant organic pollutants from landfill leachate. The effect of operating parameters reveals that pH and temperature affect the reaction rate. The addition of oxidant H2O2 to the TiO2/ZnO suspension suggests that TiO2 leads to an increase in the rate of reaction when compared to ZnO. Photocatalytic remediation technique of landfill leachate would support the goal of environmental sustainability by greatly enhancing the effectiveness of treated leachate reutilization. In this review, the selection of the best photocatalytic treatment for leachate based on its systematic relevance and potential conditions, characteristics, cost-effectiveness, essential controlling, discharge limit, long-term environmental effects, and its future study perspectives are emphasized and discussed.
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Affiliation(s)
- S Kanmani
- Centre for Environmental Studies, College of Engineering Guindy, Anna University, Chennai, 600 025, Tamil Nadu, India.
| | - A G Bharathi Dileepan
- Centre for Environmental Studies, College of Engineering Guindy, Anna University, Chennai, 600 025, Tamil Nadu, India
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3
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Hassaan MA, El-Nemr MA, Elkatory MR, Ragab S, Niculescu VC, El Nemr A. Principles of Photocatalysts and Their Different Applications: A Review. Top Curr Chem (Cham) 2023; 381:31. [PMID: 37906318 PMCID: PMC10618379 DOI: 10.1007/s41061-023-00444-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 10/11/2023] [Indexed: 11/02/2023]
Abstract
Human existence and societal growth are both dependent on the availability of clean and fresh water. Photocatalysis is a type of artificial photosynthesis that uses environmentally friendly, long-lasting materials to address energy and environmental issues. There is currently a considerable demand for low-cost, high-performance wastewater treatment equipment. By changing the structure, size, and characteristics of nanomaterials, the use of nanotechnology in the field of water filtration has evolved dramatically. Semiconductor-assisted photocatalysis has recently advanced to become among the most promising techniques in the fields of sustainable energy generation and ecological cleanup. It is environmentally beneficial, cost-effective, and strictly linked to the zero waste discharge principle used in industrial effluent treatment. Owing to the reduction or removal of created unwanted byproducts, the green synthesis of photoactive nanomaterial is more beneficial than chemical synthesis approaches. Furthermore, unlike chemical synthesis methods, the green synthesis method does not require the use of expensive, dangerous, or poisonous ingredients, making it a less costly, easy, and environmental method for photocatalyst synthesis. This work focuses on distinct greener synthesis techniques utilized for the production of new photocatalysts, including metals, metal doped-metal oxides, metal oxides, and plasmonic nanostructures, including the application of artificial intelligence and machine learning to the design and selection of an innovative photocatalyst in the context of energy and environmental challenges. A brief overview of the industrial and environmental applications of photocatalysts is also presented. Finally, an overview and recommendations for future research are given to create photocatalytic systems with greatly improved stability and efficiency.
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Affiliation(s)
- Mohamed A Hassaan
- Marine Pollution Department, Environment Division, National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, 21556, Alexandria, Egypt.
| | - Mohamed A El-Nemr
- Department of Chemical Engineering, Faculty of Engineering, Minia University, Minia, 61519, Egypt
| | - Marwa R Elkatory
- Advanced Technology and New Materials Research Institute, SRTA-City, New Borg El-Arab City, 21934, Alexandria, Egypt
| | - Safaa Ragab
- Marine Pollution Department, Environment Division, National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, 21556, Alexandria, Egypt
| | - Violeta-Carolina Niculescu
- National Research and Development Institute for Cryogenic and Isotopic Technologies-ICSI Rm. Valcea, 4th Uzinei Street, 240050, Valcea, Romania
| | - Ahmed El Nemr
- Marine Pollution Department, Environment Division, National Institute of Oceanography and Fisheries (NIOF), Kayet Bey, Elanfoushy, 21556, Alexandria, Egypt.
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4
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Al-Madanat O, Curti M, Günnemann C, AlSalka Y, Dillert R, Bahnemann DW. TiO2 photocatalysis: Impact of the platinum loading method on reductive and oxidative half-reactions. Catal Today 2021. [DOI: 10.1016/j.cattod.2021.07.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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5
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Wang D, Mueses MA, Márquez JAC, Machuca-Martínez F, Grčić I, Peralta Muniz Moreira R, Li Puma G. Engineering and modeling perspectives on photocatalytic reactors for water treatment. WATER RESEARCH 2021; 202:117421. [PMID: 34390948 DOI: 10.1016/j.watres.2021.117421] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
The debate on whether photocatalysis can reach full maturity at commercial level as an effective and economical process for treatment and purification of water and wastewater has recently intensified. Despite a bloom of scientific investigations in the last 30 years, particularly with regards to innovative photocatalytic materials, photocatalysis has so far seen a few industrial applications. Regardless of the points of view, it has been realized that research on reactor design and modeling are now equally urgent to match the extensive research carried out on innovative photocatalytic materials. In reality, the development of photocatalytic reactors has advanced steadily in terms of modeling and reactor design over the last two decades, though this topic has captured a smaller specialized audience. In this critical review, we introduce the latest developments on photocatalytic reactors for water treatment from an engineering perspective. The focus is on the modeling and design of photocatalytic reactors for water treatment at pilot- or at greater scale. Photocatalytic reactors utilizing both natural sunlight and UV irradiation sources are comprehensively discussed. The most promising photoreactor designs and models are examined giving key design guidelines. Other engineering considerations, such as operation, cost analysis, patents, and several industrial applications of photocatalytic reactors for water treatment are also presented. The dissemination of key photocatalytic reactor design principles among the scientific community and the water industry is currently one of the greatest obstacles in translating PWT research into widespread real-world application.
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Affiliation(s)
- Dawei Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
| | - Miguel Angel Mueses
- Photocatalysis & Solar Photoreactors Engineering, Modeling & Application of AOPs, Chemical Engineering Program, Universidad de Cartagena, Zip code 1382-Postal 195, Cartagena, Colombia
| | - José Angel Colina Márquez
- Photocatalysis & Solar Photoreactors Engineering, Modeling & Application of AOPs, Chemical Engineering Program, Universidad de Cartagena, Zip code 1382-Postal 195, Cartagena, Colombia
| | | | - Ivana Grčić
- Faculty of Geotechnical Engineering, Department for Environmental Engineering, University of Zagreb, Hallerova aleja 7, Varaždin HR-42000, Croatia
| | - Rodrigo Peralta Muniz Moreira
- Environmental Nanocatalysis & Photoreaction Engineering, Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom
| | - Gianluca Li Puma
- Environmental Nanocatalysis & Photoreaction Engineering, Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom.
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6
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Design of Novel Photocatalytic Films for the Protection of Architectural Surfaces via the Incorporation of Green Photocatalysts. COATINGS 2021. [DOI: 10.3390/coatings11080934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In conservation science the demand of multifunctional green materials displaying water repellency, consolidation, resistance to organic pollutants and pigments is constantly increasing. This research developed a green nanocomposite exhibiting photocatalytic, hydrophobic, consolidation and self-cleaning properties. This was achieved by synthesizing a TiO2 photocatalyst enriched with carbon dots (C-dots) and successfully incorporated into a tetraethoxysilane nanocomposite modified with nano-calcium oxalate and polydimethylsiloxane. The TiO2/C-dots that were prepared with a simple, low temperature, cost-effective and large-scale procedure were assessed via analytical and spectroscopic techniques and were resulted in anatase structure ranging in size from 10 to 40 nm. Photooxidation measurements displayed that TiO2/C-dots nanoparticles could photodegrade completely Methyl Orange (MO) under UV and visible irradiation after 120 min. The photocatalytic performance of the nanocomposite with TiO2/C-dots resulted promising under UV after longer irradiation time. The degradation of MO was faster on bulk xerogels containing the TiO2/C-dots than the corresponding ones with TiO2. The treatment of concrete, limestone and lime mortars with the nanocomposite proved to be compatible with the substrates in terms of aesthetical aspects. This study demonstrates encouraging potential for large-scale production of a multifunctional protective composite that offers hydrophobicity, self-cleaning properties and consolidation to architectural surfaces.
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Zong Z, Chen D, Zhao C, Tang G, Ji Y, Zhang H, Lv Z, Dong W, Zhu X. Photocatalytic degradation performance of gaseous formaldehyde by Ce-Eu/TiO 2 hollow microspheres: from experimental evaluation to simulation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:34762-34775. [PMID: 33660171 DOI: 10.1007/s11356-021-13112-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 02/18/2021] [Indexed: 06/12/2023]
Abstract
Gaseous formaldehyde present indoors is often in low-medium concentration, as compared to that contained in manufactured products, but still poses great threat to human health. Thus, this work aims to fabricate Ce-Eu/TiO2 hollow microspheres, which showed excellent photocatalytic performance toward formaldehyde. Furthermore, photocatalytical degradation performance of Ce-Eu/TiO2 hollow microspheres toward formaldehyde was investigated. The kinetics of degradation mechanism of gaseous formaldehyde for different concentrations and different temperatures vs time were studied, and the simulation and experimental results were also compared. It was found that formaldehyde concentration had an effect on the degradation process, which was consistent with different kinetics reactions. At low concentration, the degradation rate was decided by the adsorption rate, and no accumulation of adsorbent occurred. This process was consistent with the first-order kinetics law, which was established by L-H dynamics theory and Arrhenius equation. At medium concentration, the degradation process of formaldehyde was controlled by both adsorption and photocatalysis, which was consistent with the power law model. The 3D model of formaldehyde degradation process by Ce-Eu/TiO2 hollow microspheres at different concentrations vs time was established, and the results showed that the simulation equations were in good agreement with the experimental results.
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Affiliation(s)
- Zhifang Zong
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, 243032, Anhui, People's Republic of China
- State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, People's Republic of China
- Anhui Province Key Laboratory of Metallurgical Engineering and Resources Recycling, Anhui University of Technology, Ma'anshan, 243032, Anhui, People's Republic of China
| | - Depeng Chen
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, 243032, Anhui, People's Republic of China.
| | - Chunxiao Zhao
- State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, People's Republic of China.
| | - Gang Tang
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, 243032, Anhui, People's Republic of China
| | - Yilong Ji
- Anhui Province Key Laboratory of Metallurgical Engineering and Resources Recycling, Anhui University of Technology, Ma'anshan, 243032, Anhui, People's Republic of China
| | - Hao Zhang
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, 243032, Anhui, People's Republic of China
- Anhui Province Key Laboratory of Metallurgical Engineering and Resources Recycling, Anhui University of Technology, Ma'anshan, 243032, Anhui, People's Republic of China
| | - Zhong Lv
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, 243032, Anhui, People's Republic of China
| | - Wei Dong
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, 243032, Anhui, People's Republic of China
| | - Xiujuan Zhu
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma'anshan, 243032, Anhui, People's Republic of China
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8
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Wang T, Dissanayake PD, Sun M, Tao Z, Han W, An N, Gu Q, Xia D, Tian B, Ok YS, Shang J. Adsorption and visible-light photocatalytic degradation of organic pollutants by functionalized biochar: Role of iodine doping and reactive species. ENVIRONMENTAL RESEARCH 2021; 197:111026. [PMID: 33744265 DOI: 10.1016/j.envres.2021.111026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 02/28/2021] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
Here we developed the functionalized biochar as low-cost and heavy metal-free photocatalysts via a facile iodine doping method, which exhibit efficient adsorption and visible-light-driven photocatalytic degradation of representative organic pollutants, phenol and tetracycline. On one hand, iodine doping elevates the adsorption via creating extra pores, e.g., the adsorbed amounts of phenol by iodine-doped WSP and OSR biochar are increased by 161.8% and 146.3%, respectively, which in turn facilitates the photocatalytic oxidation of the adsorbed pollutants. On the other hand, iodine doping leads to the strong photo-induced excitation and remarkably reduced charge carrier transfer resistance, boosting the photocatalytic activity of iodine-doped biochar by more than 20 orders towards organic pollutants (e.g., phenol) degradation. The systematic analysis of reactive species reveals the active roles of O2-, H2O2, 1O2, OH, electrons, and holes in photocatalytic process and identifies O2- to be the major contributor. This work affords a facile approach to generating porous and visible-light-driven photocatalyst from biomass for efficient adsorbing and degrading organic pollutants, opening up an avenue to turn biowaste into biomaterials for sustainable environmental remediation.
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Affiliation(s)
- Tianqi Wang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China; School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Pavani Dulanja Dissanayake
- Korea Biochar Research Center, APRU Sustainable Waste Management & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Mingzhe Sun
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, 518060, China
| | - Zeyu Tao
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, 518060, China
| | - Wei Han
- College of Land and Environment, Shenyang Agricultural University, NO. 120 Dongling Road, Shenhe District, Shenyang, 110866, China
| | - Ning An
- College of Land and Environment, Shenyang Agricultural University, NO. 120 Dongling Road, Shenhe District, Shenyang, 110866, China
| | - Qinfen Gu
- The Australian Synchrotron (ANSTO), 800 Blackburn Road, Clayton, VIC, 3168, Australia
| | - Dehua Xia
- School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Bingbing Tian
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China.
| | - Yong Sik Ok
- Korea Biochar Research Center, APRU Sustainable Waste Management & Division of Environmental Science and Ecological Engineering, Korea University, Seoul, 02841, Republic of Korea.
| | - Jin Shang
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China; City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen, 518060, China.
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Abstract
The growing world energy consumption, with reliance on conventional energy sources and the associated environmental pollution, are considered the most serious threats faced by mankind. Heterogeneous photocatalysis has become one of the most frequently investigated technologies, due to its dual functionality, i.e., environmental remediation and converting solar energy into chemical energy, especially molecular hydrogen. H2 burns cleanly and has the highest gravimetric gross calorific value among all fuels. However, the use of a suitable electron donor, in what so-called “photocatalytic reforming”, is required to achieve acceptable efficiency. This oxidation half-reaction can be exploited to oxidize the dissolved organic pollutants, thus, simultaneously improving the water quality. Such pollutants would replace other potentially costly electron donors, achieving the dual-functionality purpose. Since the aromatic compounds are widely spread in the environment, they are considered attractive targets to apply this technology. In this review, different aspects are highlighted, including the employing of different polymorphs of pristine titanium dioxide as photocatalysts in the photocatalytic processes, also improving the photocatalytic activity of TiO2 by loading different types of metal co-catalysts, especially platinum nanoparticles, and comparing the effect of various loading methods of such metal co-catalysts. Finally, the photocatalytic reforming of aromatic compounds employing TiO2-based semiconductors is presented.
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10
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Al-Madanat O, AlSalka Y, Curti M, Dillert R, Bahnemann DW. Mechanistic Insights into Hydrogen Evolution by Photocatalytic Reforming of Naphthalene. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01713] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Osama Al-Madanat
- Institut für Technische Chemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstr. 3, D-30167 Hannover, Germany
- Chemistry Department, Mutah University, Mutah, 61710 Al-Karak, Jordan
| | - Yamen AlSalka
- Institut für Technische Chemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstr. 3, D-30167 Hannover, Germany
- Laboratorium für Nano- und Quantenengineering, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 39, D-30167 Hannover, Germany
| | - Mariano Curti
- Institut für Technische Chemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstr. 3, D-30167 Hannover, Germany
| | - Ralf Dillert
- Institut für Technische Chemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstr. 3, D-30167 Hannover, Germany
- Laboratorium für Nano- und Quantenengineering, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 39, D-30167 Hannover, Germany
| | - Detlef W. Bahnemann
- Institut für Technische Chemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstr. 3, D-30167 Hannover, Germany
- Laboratorium für Nano- und Quantenengineering, Gottfried Wilhelm Leibniz Universität Hannover, Schneiderberg 39, D-30167 Hannover, Germany
- Laboratory “Photoactive Nanocomposite Materials”, Saint-Petersburg State University, Ulyanovskaya str. 1, Peterhof, Saint-Petersburg 198504, Russia
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11
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Elleuch L, Messaoud M, Djebali K, Attafi M, Cherni Y, Kasmi M, Elaoud A, Trabelsi I, Chatti A. A new insight into highly contaminated landfill leachate treatment using Kefir grains pre-treatment combined with Ag-doped TiO 2 photocatalytic process. JOURNAL OF HAZARDOUS MATERIALS 2020; 382:121119. [PMID: 31494532 DOI: 10.1016/j.jhazmat.2019.121119] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 08/17/2019] [Accepted: 08/28/2019] [Indexed: 06/10/2023]
Abstract
This study investigates the performance of the combination of biological pre-treatment with Kefir grains (KGs) and photocatalytic process using Ag-doped TiO2 nanoparticles (NPs) for the simultaneous removal of toxic pollutants from landfill leachate (LFL). After 5 days of 1% (w/v) KGs pre-treatment at 37 °C, TOC, COD, NH4+-N, and PO43- removal rates were 93, 83.33, 70 and 88.25%, respectively. The removal efficiencies were found to be 100, 94, 62.5, 53.16 and 47.52 % for Cd, Ni, Zn, Mn and Cu, respectively. The optimal conditions of Ag-doped TiO2 photocatalytic process were optimized using Box-Behnken design and response surface methodology (BBD-RSM) to enhance the quality of pre-treated LFL. Interestingly, Ag-doped TiO2 photocatalytic process increases the overall removal efficiencies to 98, 96, 85 and 93% of TOC, COD, NH4+-N, and PO43-, respectively. Furthermore, the removal efficiency of toxic heavy metals was gradually improved. In addition, KGs and Ag-doped TiO2 exhibited excellent recyclability showing the potential of combined biological/photocatalytic process to treat hazardous LFL.
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Affiliation(s)
- Lobna Elleuch
- Laboratory of Treatment and Valorization of Water Rejects, Water Researches and Technologies Center, Borj-Cedria Technopark, University of Carthage, 8020, Soliman, Tunisia.
| | - Mouna Messaoud
- Laboratory of advanced Materials, National School of Engineers of Sfax, University of Sfax, 3038, Sfax, Tunisia
| | - Kais Djebali
- Support Research and Technology Transfer Unit, Biotechnology Center Borj-Cedria Technopark, 2050, Hammam-Lif, Tunisia
| | - Marwa Attafi
- Laboratory of Treatment and Valorization of Water Rejects, Water Researches and Technologies Center, Borj-Cedria Technopark, University of Carthage, 8020, Soliman, Tunisia
| | - Yasmin Cherni
- Laboratory of Treatment and Valorization of Water Rejects, Water Researches and Technologies Center, Borj-Cedria Technopark, University of Carthage, 8020, Soliman, Tunisia
| | - Mariam Kasmi
- Laboratory of Treatment and Valorization of Water Rejects, Water Researches and Technologies Center, Borj-Cedria Technopark, University of Carthage, 8020, Soliman, Tunisia
| | - Anis Elaoud
- Laboratory of Environmental Science and Technologies, Higher Institute of Sciences and Technology of Environment, University of Carthage, 2050, Borj-Cedria, Tunisia
| | - Ismail Trabelsi
- Laboratory of Treatment and Valorization of Water Rejects, Water Researches and Technologies Center, Borj-Cedria Technopark, University of Carthage, 8020, Soliman, Tunisia
| | - Abdelwaheb Chatti
- Laboratory of Treatment and Valorization of Water Rejects, Water Researches and Technologies Center, Borj-Cedria Technopark, University of Carthage, 8020, Soliman, Tunisia
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12
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Calza P, Minella M, Demarchis L, Sordello F, Minero C. Photocatalytic rate dependence on light absorption properties of different TiO2 specimens. Catal Today 2020. [DOI: 10.1016/j.cattod.2018.10.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Monllor-Satoca D, Díez-García MI, Lana-Villarreal T, Gómez R. Photoelectrocatalytic production of solar fuels with semiconductor oxides: materials, activity and modeling. Chem Commun (Camb) 2020; 56:12272-12289. [DOI: 10.1039/d0cc04387g] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Transition metal oxides keep on being excellent candidates as electrode materials for the photoelectrochemical conversion of solar energy into chemical energy.
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Affiliation(s)
- Damián Monllor-Satoca
- Departament de Química Física i Institut Universitari d'Electroquímica
- Universitat d'Alacant
- Alicante
- Spain
| | - María Isabel Díez-García
- Departament de Química Física i Institut Universitari d'Electroquímica
- Universitat d'Alacant
- Alicante
- Spain
| | - Teresa Lana-Villarreal
- Departament de Química Física i Institut Universitari d'Electroquímica
- Universitat d'Alacant
- Alicante
- Spain
| | - Roberto Gómez
- Departament de Química Física i Institut Universitari d'Electroquímica
- Universitat d'Alacant
- Alicante
- Spain
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Walenta CA, Tschurl M, Heiz U. Introducing catalysis in photocatalysis: What can be understood from surface science studies of alcohol photoreforming on TiO 2. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:473002. [PMID: 31342942 DOI: 10.1088/1361-648x/ab351a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Mechanisms in heterogeneous photocatalysis have traditionally been interpreted by the band-structure model and analogously to electrochemistry. This has led to the establishment of 'band-engineering' as a leading principle for the discovery of more efficient photocatalysts. In such a picture, mainly thermodynamic aspects are taken into account, while kinetics are often ignored. This holds in particular for chemical kinetics, which are, other than those for charge carrier dynamics, often not at all considered for the interpretation of the catalysts' photocatalytic performance. However, while being usually neglected in photocatalyis, they are a traditional and powerful tool in thermal catalysis and are still applied with great success in this field. While surface science studies made substantial contributes to thermal catalysis, analogous studies in heterogeneous photocatalysis still play only a minor role. In this review, the authors show that the photo-physics of defined materials in well-defined environments can be correlated with photochemical events on a surface, highlighting the importance of well-characterized semiconductors for the interpretation of mechanisms in heterogeneous photochemistry. The work focuses on contributions from surface science, which were obtained for the model system of a titania single crystal and alcohol photo-reforming. It is demonstrated that only surface science studies have so far enabled the elucidation of molecularly precise reaction mechanisms, the determination of reaction intermediates and assignment of reactive sites. As the identification of these properties remain major prerequisites for a breakthrough in photocatalysis research, the work also discusses the implications of the findings for applied systems. In general, the results from surface science demonstrate that photocatalytic systems shall also be approached by a perspective originating from heterogeneous catalysis rather than solely from an electrochemical point of view.
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Alshammari A, Bagabas A, Assulami M. Photodegradation of rhodamine B over semiconductor supported gold nanoparticles: The effect of semiconductor support identity. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2014.11.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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16
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Effective photocatalytic mechanism on dye decolorization in different water matrices with phenolic resins as a photocatalyst under visible LED irradiation. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.12.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Park S, Lee JT, Kim J. Photocatalytic oxidation of urea on TiO 2 in water and urine: mechanism, product distribution, and effect of surface platinization. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:1044-1053. [PMID: 28161860 DOI: 10.1007/s11356-017-8380-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 01/03/2017] [Indexed: 06/06/2023]
Abstract
The photocatalytic oxidation of urea on TiO2 in water was compared with that in urine. Despite the presence of other organic compounds in urine, the oxidation efficiency of urea on TiO2 in urine was higher than that in water. This enhanced oxidation of urea in urine is ascribed to the higher production of •OH (primary oxidant for urea degradation) by the adsorption of PO43- (one constituent of urine) on the TiO2 surface. Among the various anions in urine, only PO43- was adsorbed on the surface of TiO2. Both the production of •OH and the oxidation of urea were enhanced in the presence of PO43-. These results indicate that the enhanced •OH production by in situ surface phosphorylation is the reason for the increased oxidation of urea in urine. Surface platinization of TiO2 enhanced the oxidation of urea in water. However, the oxidation efficiency of urea on Pt/TiO2 in urine was lower than that in water. This behavior is due to the adsorption of PO43- and SO42- in urine on Pt deposits, which inhibits the adsorption of oxygen and the interfacial electron transfer to oxygen. The product distribution (i.e., the molar ratio of NO3- to NH4+) in water was different from that in urine because the negatively charged surface of TiO2 in urine attracts the positively charged area of carbamic acid (intermediate) and encourages its decomposition into NH4+ and not into NO3-.
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Affiliation(s)
- Soona Park
- Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon, Gangwon-do, 24252, South Korea
| | - Jeong Tae Lee
- Department of Chemistry and Institute of Applied Chemistry, Hallym University, Chuncheon, Gangwon-do, 24252, South Korea
| | - Jungwon Kim
- Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon, Gangwon-do, 24252, South Korea.
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Teixeira ARFA, de Meireles Neris A, Longo E, de Carvalho Filho JR, Hakki A, Macphee D, dos Santos IMG. SrSnO3 perovskite obtained by the modified Pechini method—Insights about its photocatalytic activity. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.10.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Le TA, Huynh TP. The Combination of Hydrogen and Methanol Production through Artificial Photosynthesis-Are We Ready Yet? CHEMSUSCHEM 2018; 11:2654-2672. [PMID: 29944207 DOI: 10.1002/cssc.201800731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 06/22/2018] [Indexed: 06/08/2023]
Abstract
Because 100 % quantum efficiency for the photosynthetic production of H2 from H2 O under visible illumination has been achieved recently, the oxidation of H2 O to O2 remains the bottleneck to the overall water-splitting reaction. Oxidation of CH4 to CH3 OH might be combined with water reduction instead, so that H2 and CH3 OH chemical fuels can be simultaneously produced through a one-step process under solar illumination. This combination would be a promising approach towards a more sustainable future of chemistry, in which developing different strategies for artificial photosynthesis is of paramount importance. By using free and adsorbed HO. radicals on the semiconductor surface, CH4 can be activated to H3 C. radicals and converted into CH3 OH, respectively, with great selectivity up to 100 %. The present lack of efficient photosynthetic systems for the formation of H2 and CH3 OH from abundant H2 O and CH4 motivates future research for basic science and industrial applications.
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Affiliation(s)
- Trung-Anh Le
- Laboratory of Physical Chemistry, Faculty of Science and Engineering, Åbo Akademi University, Porthaninkatu 3-5, 20500, Turku, Finland
| | - Tan-Phat Huynh
- Laboratory of Physical Chemistry, Faculty of Science and Engineering, Åbo Akademi University, Porthaninkatu 3-5, 20500, Turku, Finland
- Center of Functional Materials, Åbo Akademi University, 20500, Turku, Finland
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Vasilaki E, Vamvakaki M, Katsarakis N. Complex ZnO-TiO 2 Core-Shell Flower-Like Architectures with Enhanced Photocatalytic Performance and Superhydrophilicity without UV Irradiation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9122-9132. [PMID: 30021443 DOI: 10.1021/acs.langmuir.8b01619] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
ZnO-TiO2 core-shell photocatalysts of a complex flower-like architecture were synthesized, using a well-controlled sol-gel coating reaction of presynthesized ZnO flower-like structures. The samples were characterized by X-ray diffraction, field emission scanning and transmission electron microscopy, energy-dispersive X-ray spectroscopy, diffuse reflectance UV-vis and attenuated total reflectance-Fourier transform infrared spectroscopy, nitrogen adsorption-desorption measurements, and photoluminescence measurements. Well-defined, core-shell flowers with a wurtzite ZnO core and anatase TiO2 shells, with variable shell thickness, were acquired by appropriately adjusting the ZnO/Ti precursor mass feed ratio in the reaction. Moreover, hollow TiO2 flowers were obtained, and they retained their morphology following the etching of the ZnO core in an acidic solution. The photocatalytic performance of the core-shell and hollow semiconductors was evaluated via the decoloration of a methylene blue dye solution under UV-vis irradiation. The core-shell flowers exhibited a higher decoloration rate, when compared with bare ZnO flowers, TiO2 particles, and hollow TiO2 flowers, and the photoactivity was dependent on the TiO2 shell thickness. This was attributed to the efficient separation of the photogenerated holes and electrons at the ZnO-TiO2 interface. Moreover, the most photoactive core-shell catalyst exhibited excellent reusability and stability for at least three photocatalytic cycles and excellent superhydrophilicity without UV irradiation, which is due to the increased roughness of the flower-like structures.
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Affiliation(s)
- Evangelia Vasilaki
- Department of Chemistry , University of Crete 710 03 Heraklion , Crete , Greece
- Center of Materials Technology and Photonics, School of Applied Technology , Technological Educational Institute of Crete , 710 04 Heraklion , Crete , Greece
- Institute of Electronic Structure and Laser , Foundation for Research and Technology-Hellas , 711 10 Heraklion , Crete , Greece
| | - Maria Vamvakaki
- Institute of Electronic Structure and Laser , Foundation for Research and Technology-Hellas , 711 10 Heraklion , Crete , Greece
- Department of Materials Science and Technology , University of Crete , 710 03 Heraklion , Crete , Greece
| | - Nikos Katsarakis
- Center of Materials Technology and Photonics, School of Applied Technology , Technological Educational Institute of Crete , 710 04 Heraklion , Crete , Greece
- Institute of Electronic Structure and Laser , Foundation for Research and Technology-Hellas , 711 10 Heraklion , Crete , Greece
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21
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Atitar MF, Bouziani A, Dillert R, El Azzouzi M, Bahnemann DW. Photocatalytic degradation of the herbicide imazapyr: do the initial degradation rates correlate with the adsorption kinetics and isotherms? Catal Sci Technol 2018. [DOI: 10.1039/c7cy01903c] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The Langmuir–Hinshelwood mechanism applies to the photocatalytic degradation of imazapyr only when assuming the occurence of light-induced changes of the photocatalyst surface affecting the adsorption of the probe molecule.
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Affiliation(s)
- M. Faycal Atitar
- Institut für Technische Chemie
- Leibniz Universität Hannover
- D-30167 Hannover
- Germany
| | - Asmae Bouziani
- University Mohammed V-Agdal
- Faculty of Science
- BP 1014 Rabat
- Morocco
| | - Ralf Dillert
- Institut für Technische Chemie
- Leibniz Universität Hannover
- D-30167 Hannover
- Germany
- Laboratorium für Nano- und Quantenengineering
| | | | - Detlef W. Bahnemann
- Institut für Technische Chemie
- Leibniz Universität Hannover
- D-30167 Hannover
- Germany
- Laboratory of Photoactive Nanocomposite Materials
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22
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Nosaka Y, Nosaka AY. Generation and Detection of Reactive Oxygen Species in Photocatalysis. Chem Rev 2017; 117:11302-11336. [DOI: 10.1021/acs.chemrev.7b00161] [Citation(s) in RCA: 1754] [Impact Index Per Article: 250.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Yoshio Nosaka
- Department of Materials Science
and Technology, Nagaoka University of Technology Nagaoka 940-2188, Japan
| | - Atsuko Y. Nosaka
- Department of Materials Science
and Technology, Nagaoka University of Technology Nagaoka 940-2188, Japan
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23
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Ryu J, Kim W, Kim J, Ju J, Kim J. Is surface fluorination of TiO2 effective for water purification? The degradation vs. mineralization of phenolic pollutants. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.03.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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24
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Camera-Roda G, Loddo V, Palmisano L, Parrino F. Guidelines for the assessment of the rate law of slurry photocatalytic reactions. Catal Today 2017. [DOI: 10.1016/j.cattod.2016.06.050] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Liu B. Monte-Carlo modelling of nano-material photocatalysis: bridging photocatalytic activity and microscopic charge kinetics. Phys Chem Chem Phys 2016; 18:11520-7. [DOI: 10.1039/c6cp01065b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this research, a full Monte-Carlo random walking model, that comprehensively involves the generation, the transport, the interfacial transfer, and the transport of carriers, to study the photocatalytic kinetics.
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Affiliation(s)
- Baoshun Liu
- State Key Laboratory of Silicate Materials for Architectures
- Wuhan University of Technology
- Wuhan City
- P. R. China
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26
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Kim J, Moon GH, Kim S, Kim J. Photocatalytic oxidation mechanism of arsenite on tungsten trioxide under visible light. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.06.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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Powder semiconductor photocatalysis in aqueous solution: An overview of kinetics-based reaction mechanisms. J Photochem Photobiol A Chem 2015. [DOI: 10.1016/j.jphotochem.2015.04.011] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Liu B, Zhao X, Terashima C, Fujishima A, Nakata K. Thermodynamic and kinetic analysis of heterogeneous photocatalysis for semiconductor systems. Phys Chem Chem Phys 2015; 16:8751-60. [PMID: 24675975 DOI: 10.1039/c3cp55317e] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Since the report of the Honda-Fujishima effect, heterogeneous photocatalysis has attracted much attention around the world because of its potential energy and environmental applications. Although great progresses have been made in recent years, most were focused on preparing highly-active photocatalysts and investigating visible light utilization. In fact, we are still unclear on the thermodynamic and kinetic nature of photocatalysis to date, which sometimes leads to misunderstandings for experimental results. It is timely to give a review and discussion on the thermodynamics and kinetics of photocatalysis, so as to direct future researches. However, there is an absence of a detailed review on this topic until now. In this article, we tried to review and discuss the thermodynamics and kinetics of photocatalysis. We explained the thermodynamic driving force of photocatalysis, and distinguished the functions of light and heat in photocatalysis. The Langmuir-Hinshelwood kinetic model, the ˙OH oxidation mechanism, and the direct-indirect (D-I) kinetic model were reviewed and compared. Some applications of the D-I model to study photocatalytic kinetics were also discussed. The electron transport mode and its importance in photocatalysis were investigated. Finally, the intrinsic relation between the kinetics and the thermodynamics of photocatalytic reactions was discussed.
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Affiliation(s)
- Baoshun Liu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Luoshi road 122, Wuhan, Hubei, P. R. China.
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Liu B, Wang X, Wen L, Zhao X. Investigation of electron behavior in Nano-TiO2 photocatalysis by using in situ open-circuit voltage and photoconductivity measurements. Chemistry 2013; 19:10751-9. [PMID: 23794228 DOI: 10.1002/chem.201300243] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 04/25/2013] [Indexed: 11/10/2022]
Abstract
The in situ open-circuit voltages (Voc ) and the in situ photoconductivities have been measured to study electron behavior in photocatalysis and its effect on the photocatalytic oxidation of methanol. It was observed that electron injection to the conduction band (CB) of TiO2 under light illumination during photocatalysis includes two sources: from the valence band (VB) of TiO2 and from the methanol molecule. The electron injection from methanol to TiO2 is slower than that directly from the VB, which indicates that the adsorption mode of methanol on the TiO2 surface can change between dark and illuminated states. The electron injection from methanol to the CB of TiO2 leads to the upshift of the Fermi level of electrons in TiO2 , which is the thermodynamic driving force of photocatalytic oxidation. It was also found that the charge state of nano-TiO2 is continuously changing during photocatalysis as electrons are injected from methanol to TiO2 . Combined with the apparent Langmuir-Hinshelwood kinetic model, the relation between photocatalytic kinetics and electrons in the TiO2 CB was developed and verified experimentally. The photocatalytic rate constant is the variation of the Fermi level with time, based on which a new method was developed to calculate the photocatalytic kinetic rate constant by monitoring the change of Voc with time during photocatalysis.
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Affiliation(s)
- Baoshun Liu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan City, Hubei Province 430070, P. R. China.
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31
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Ivanova I, Schneider J, Gutzmann H, Kliemann JO, Gärtner F, Klassen T, Bahnemann D, Mendive CB. Photocatalytic degradation of oxalic and dichloroacetic acid on TiO2 coated metal substrates. Catal Today 2013. [DOI: 10.1016/j.cattod.2012.12.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Specific Facets-Dominated Anatase TiO2: Fluorine-Mediated Synthesis and Photoactivity. Catalysts 2013. [DOI: 10.3390/catal3020455] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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33
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Montoya JF, Ivanova I, Dillert R, Bahnemann DW, Salvador P, Peral J. Catalytic Role of Surface Oxygens in TiO2 Photooxidation Reactions: Aqueous Benzene Photooxidation with Ti(18)O2 under Anaerobic Conditions. J Phys Chem Lett 2013; 4:1415-1422. [PMID: 26282293 DOI: 10.1021/jz400580b] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Affiliation(s)
- Juan Felipe Montoya
- †Departamento de Quı́mica, Universidad Autónoma de Barcelona, 08193 Cerdanyola del Vallés, Spain
| | - Irina Ivanova
- ‡Institut für Technische Chemie, Leibniz Universität Hannover, Callinstrasse 3, D-30167 Hannover, Germany
| | - Ralf Dillert
- ‡Institut für Technische Chemie, Leibniz Universität Hannover, Callinstrasse 3, D-30167 Hannover, Germany
| | - Detlef W Bahnemann
- ‡Institut für Technische Chemie, Leibniz Universität Hannover, Callinstrasse 3, D-30167 Hannover, Germany
| | - Pedro Salvador
- †Departamento de Quı́mica, Universidad Autónoma de Barcelona, 08193 Cerdanyola del Vallés, Spain
| | - José Peral
- †Departamento de Quı́mica, Universidad Autónoma de Barcelona, 08193 Cerdanyola del Vallés, Spain
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Doping TiO2 with p-block elements: Effects on photocatalytic activity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2013. [DOI: 10.1016/j.jphotochemrev.2012.09.002] [Citation(s) in RCA: 297] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Hauchecorne B, Lenaerts S. Unravelling the mysteries of gas phase photocatalytic reaction pathways by studying the catalyst surface: A literature review of different Fourier transform infrared spectroscopic reaction cells used in the field. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2013. [DOI: 10.1016/j.jphotochemrev.2012.09.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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36
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Bakhshayesh A, Mohammadi M, Dadar H, Fray D. Improved efficiency of dye-sensitized solar cells aided by corn-like TiO2 nanowires as the light scattering layer. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.12.065] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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37
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Rabani J, Goldstein S. Mechanisms of Reactions Induced by Photocatalysis of Titanium Dioxide Nanoparticles. ENVIRONMENTAL PHOTOCHEMISTRY PART III 2013. [DOI: 10.1007/698_2013_248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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38
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Ghows N, Entezari MH. Kinetic investigation on sono-degradation of Reactive Black 5 with core-shell nanocrystal. ULTRASONICS SONOCHEMISTRY 2013; 20:386-394. [PMID: 22818362 DOI: 10.1016/j.ultsonch.2012.06.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Revised: 06/14/2012] [Accepted: 06/19/2012] [Indexed: 06/01/2023]
Abstract
The experimental data of sonocatalytic degradation of Reactive Black 5 (RB5) as an azo dye by core-shell nanocrystals (CdS-TiO(2)) were applied to the proper kinetic models. In this work, two kinetic models were proposed and fitted properly to the data. In the first one, the heterogeneous reaction was considered similar to the Langmuir-Hinshelwood (L-H) mechanism and the kinetic rate parameters were determined. In this model, short time of sonication with initial concentration changes has been applied and the contribution of the reaction intermediates has been neglected in degradation. Hence, this model may not be valid for longer reaction times where the reaction intermediates effects prevail. In the second one, two first-order reactions in series provided the most convincing rate form for the sonodegradation of dyes adsorbed on the synthesized nanocomposite. In these series reactions, the first step is the conversion of colored dye to colored intermediate, and the second step is the conversion to colorless product(s). The obtained results were in good agreement with the proposed kinetic models. The rate constants of degradation of catalyzed reaction were higher than that obtained without catalyst, solar and UV irradiation.
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Affiliation(s)
- N Ghows
- Department of Chemistry, Ferdowsi University of Mashhad, 91775 Mashhad, Iran
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39
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Liu B, Wen L, Nakata K, Zhao X, Liu S, Ochiai T, Murakami T, Fujishima A. Polymeric Adsorption of Methylene Blue in TiO2Colloids-Highly Sensitive Thermochromism and Selective Photocatalysis. Chemistry 2012; 18:12705-11. [DOI: 10.1002/chem.201200178] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 04/06/2012] [Indexed: 11/06/2022]
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40
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Berger T, Monllor-Satoca D, Jankulovska M, Lana-Villarreal T, Gómez R. The electrochemistry of nanostructured titanium dioxide electrodes. Chemphyschem 2012; 13:2824-75. [PMID: 22753152 DOI: 10.1002/cphc.201200073] [Citation(s) in RCA: 217] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2012] [Indexed: 11/12/2022]
Abstract
Several of the multiple applications of titanium dioxide nanomaterials are directly related to the introduction or generation of charge carriers in the oxide. Thus, electrochemistry plays a central role in the understanding of the factors that must be controlled for the optimization of the material for each application. Herein, the main conceptual tools needed to address the study of the electrochemical properties of TiO(2) nanostructured electrodes are reviewed, as well as the electrochemical methods to prepare and modify them. Particular attention is paid to the dark electrochemical response of these nanomaterials and its direct connection with the TiO(2) electronic structure, interfacial area and grain boundary density. The physical bases for the generation of currents under illumination are also presented. Emphasis is placed on the fact that the kinetics of charge-carrier transfer to solution determines the sign and value of the photocurrent. Furthermore, methods for extracting kinetic information from open-circuit potential and photocurrent measurements are briefly presented. Some aspects of the combination of electrochemical and spectroscopic measurements are also dealt with. Finally, some of the applications of TiO(2) nanostructured samples derived from their electrochemical properties are concisely reviewed. Particular attention is paid to photocatalytic processes and, to a lesser extent, to photosynthetic reactions as well as to applications related to energy from the aspects of both saving (electrochromic layers) and accumulation (batteries). The use of TiO(2) nanomaterials in solar cells is not covered, as a number of reviews have been published addressing this issue.
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Affiliation(s)
- Thomas Berger
- Institut Universitari d'Electroquímica i Departament de Química Física, Universitat d'Alacant, Apartat 99, 03080 Alacant, Spain
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41
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Robertson PKJ, Robertson JMC, Bahnemann DW. Removal of microorganisms and their chemical metabolites from water using semiconductor photocatalysis. JOURNAL OF HAZARDOUS MATERIALS 2012; 211-212:161-171. [PMID: 22178373 DOI: 10.1016/j.jhazmat.2011.11.058] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 11/16/2011] [Accepted: 11/17/2011] [Indexed: 05/27/2023]
Abstract
Semiconductor photocatalysis has been applied to the remediation of an extensive range of chemical pollutants in water over the past 30 years. The application of this versatile technology for removal of micro-organisms and cyanotoxins has recently become an area that has also been the subject of extensive research particularly over the past decade. This paper considers recent research in the application of semiconductor photocatalysis for the treatment of water contaminated with pathogenic micro-organisms and cyanotoxins. The basic processes involved in photocatalysis are described and examples of recent research into the use of photocatalysis for the removal of a range of microorganisms are detailed. The paper concludes with a review of the key research on the application of this process for the removal of chemical metabolites generated from cyanobacteria.
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Affiliation(s)
- Peter K J Robertson
- IDeaS, Innovation, Design and Sustainability Research Institute, Robert Gordon University, Schoolhill, Aberdeen, AB10 1FR, UK.
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Valencia S, Marín J, Velásquez J, Restrepo G, Frimmel FH. Study of pH effects on the evolution of properties of brown-water natural organic matter as revealed by size-exclusion chromatography during photocatalytic degradation. WATER RESEARCH 2012; 46:1198-1206. [PMID: 22209274 DOI: 10.1016/j.watres.2011.12.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2011] [Revised: 12/09/2011] [Accepted: 12/10/2011] [Indexed: 05/31/2023]
Abstract
This study shows the effect of pH on the photocatalytic degradation of natural organic matter (NOM). The experiments were carried out in batch reactor (a solar UV-light simulator) with Degussa P-25 titanium dioxide (TiO2). The NOM degradation was followed by size-exclusion chromatography for dissolved organic carbon (DOC), ultraviolet absorption and fluorescence-detection (SEC-DOC, SEC-UV254 and SEC-Fl254/450). Changes in pH values affected the adsorption of NOM onto TiO2, but did not affect the photodegradation sequence of NOM. For high or low pH values, the degradation of the NOM preferentially removed the larger molecular size fraction in comparison to the middle and small molecular size fractions, resulting in the relative increase of these smaller fractions. This sequence of NOM degradation leads to the evolution of the formation potential for disinfection by-products (DBPs). Specifically, the trihalomethanes and halogenated organic compounds formation potential (THMF and AOXFP) decreased steadily.
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Affiliation(s)
- Sergio Valencia
- Applied Physicochemical Processes, Universidad de Antioquia, Carrera 53 # 61-30, Medellín, Colombia.
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43
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Teoh WY, Scott JA, Amal R. Progress in Heterogeneous Photocatalysis: From Classical Radical Chemistry to Engineering Nanomaterials and Solar Reactors. J Phys Chem Lett 2012; 3:629-39. [PMID: 26286159 DOI: 10.1021/jz3000646] [Citation(s) in RCA: 194] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The field of heterogeneous photocatalysis has expanded rapidly in the last four decades, having undergone various evolutionary phases related to energy and the environment. The two most significant applications of photocatalysis are geared toward solar water splitting and the purification of air and water. Notably, the interdisciplinary nature of the field has increased significantly, incorporating semiconductor physics, surface sciences, photo and physical chemistry, materials science, and chemical engineering. Whereas this forms the basis on which the field continues to grow, adequate bridging of multidisciplinary knowledge remains essential. By recalling some of the classical fundamentals of photocatalysis, this Perspective provides contemporary views on heterogeneous photochemical conversion, encompassing charge transport characteristics, radical chemistry and organic degradation mechanisms, photocatalyst design, and photoreactor engineering.
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Affiliation(s)
- Wey Yang Teoh
- †Clean Energy and Nanotechnology (CLEAN) Laboratory, School of Energy and Environment, City University of Hong Kong, Hong Kong, S.A.R
| | - Jason A Scott
- ‡ARC Centre of Excellence for Functional Nanomaterials, School of Chemical Engineering, The University of New South Wales (UNSW), Sydney, Australia
| | - Rose Amal
- ‡ARC Centre of Excellence for Functional Nanomaterials, School of Chemical Engineering, The University of New South Wales (UNSW), Sydney, Australia
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44
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Giwa A, Nkeonye PO, Bello KA, Kolawole KA. Photocatalytic Decolourization and Degradation of C. I. Basic Blue 41 Using TiO<sub>2</sub> Nanoparticles. ACTA ACUST UNITED AC 2012. [DOI: 10.4236/jep.2012.39124] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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45
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Ahmed AY, Oekermann T, Lindner P, Bahnemann D. Comparison of the photoelectrochemical oxidation of methanol on rutile TiO2 (001) and (100) single crystal faces studied by intensity modulated photocurrent spectroscopy. Phys Chem Chem Phys 2012; 14:2774-83. [DOI: 10.1039/c2cp23416e] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Monllor-Satoca D, Lana-Villarreal T, Gómez R. Effect of surface fluorination on the electrochemical and photoelectrocatalytic properties of nanoporous titanium dioxide electrodes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:15312-15321. [PMID: 22039955 DOI: 10.1021/la203319b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Titanium dioxide is a widely used photocatalyst whose properties can be modified by fluoride adsorption. This work is focused on the effect of surface fluorination on the electrochemical and photoelectrocatalytic properties of TiO(2) nanoporous thin films. Surface fluorination was achieved by simple addition of HF to the working solution (pH 3.5). Open circuit potential as well as ex situ XPS measurements verify that surface modification takes place. Fluorination triggers a significant capacitance increase in the accumulation potential region, as revealed by dark voltammetric measurements for all the TiO(2) samples studied. The photoelectrocatalytic properties (measured as photocurrents under white light illumination) depend on the substrate being oxidized and, in some cases, on the nature of the TiO(2) sample. In particular, the results obtained for electrodes prepared with a mixed phase (rutile + anatase) commercial nanopowder (PI-KEM) indicate that the processes mediated by surface trapped holes, such as the photooxidation of water or methanol, are accelerated while those occurring by direct hole capture from the adsorbed state (formic acid) are retarded. The photooxidation of catechol and phenol is also enhanced upon fluorination. In such a case, the effect can be rationalized on the basis of a diminished recombination and a surface displacement of both the oxidizable organic substrates and the poisoning species formed as a result of the organics oxidation. Photoelectrochemical and in situ infrared spectroscopic measurements support these ideas. In a more general vein, the results pave the way toward a better understanding of the photocatalysis phenomena, unravelling the importance of the reactant adsorption processes.
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Affiliation(s)
- Damián Monllor-Satoca
- Institut Universitari d'Electroquímica i Departament de Química Física, Universitat d'Alacant, Apartat 99, E-03080 Alacant, Spain
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47
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Lopez-Alvarez B, Torres-Palma RA, Peñuela G. Solar photocatalitycal treatment of carbofuran at lab and pilot scale: effect of classical parameters, evaluation of the toxicity and analysis of organic by-products. JOURNAL OF HAZARDOUS MATERIALS 2011; 191:196-203. [PMID: 21592651 DOI: 10.1016/j.jhazmat.2011.04.060] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2011] [Revised: 04/12/2011] [Accepted: 04/14/2011] [Indexed: 05/24/2023]
Abstract
In this work the TiO(2) solar-photocatalytical degradation of the pesticide carbofuran (CBF) in water, at lab and pilot scale, was studied. At lab scale the evaluation of CBF concentration (14-282 μmol L(-1)) showed that the system followed a Langmuir-Hinshelwood kinetics type. TiO(2) concentration (0.05-2 g L(-1)) and initial pH (3-9) were also evaluated and optimized using the surface response methodology and the Pareto diagram. In the range of variables studied, initial pH 7.60 and 1.43 g L(-1) of TiO(2) favoured the efficiency of the process. Under optimal conditions the evolution of substrate, chemical oxygen demand, dissolved organic carbon, toxicity and organics by-products were evaluated. In the pilot scale tests, using direct sunlight, 55 mg L(-1) of CBF in a commercial formulation was eliminated after 420 min; while after 900 min of treatment 80% of toxicity (1/E(50) on Vibrium Fischeri), 80% of chemical oxygen demand and 60% of dissolved organic carbon were removed. The analysis and evolution of five CBF by-products, as well the evaluation of the treatment in the presence of isopropanol or using acetonitrile as a solvent suggest that the degradation is mainly carried out by OH radical attack. Finally, a schema depicting the main degradation pathway is proposed.
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Affiliation(s)
- Blady Lopez-Alvarez
- Grupo de diagnóstico y control de la contaminación, Universidad de Antioquia, Medellín, Colombia
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48
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Montoya JF, Peral J, Salvador P. Surface Chemistry and Interfacial Charge-Transfer Mechanisms in Photoinduced Oxygen Exchange at O2-TiO2 Interfaces. Chemphyschem 2011; 12:901-7. [DOI: 10.1002/cphc.201000611] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Revised: 09/16/2010] [Indexed: 11/08/2022]
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49
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Monllor-Satoca D, Gómez R. A photoelectrochemical and spectroscopic study of phenol and catechol oxidation on titanium dioxide nanoporous electrodes. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.03.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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50
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Chong MN, Jin B, Chow CWK, Saint C. Recent developments in photocatalytic water treatment technology: a review. WATER RESEARCH 2010; 44:2997-3027. [PMID: 20378145 DOI: 10.1016/j.watres.2010.02.039] [Citation(s) in RCA: 1998] [Impact Index Per Article: 142.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Revised: 02/26/2010] [Accepted: 02/27/2010] [Indexed: 05/19/2023]
Abstract
In recent years, semiconductor photocatalytic process has shown a great potential as a low-cost, environmental friendly and sustainable treatment technology to align with the "zero" waste scheme in the water/wastewater industry. The ability of this advanced oxidation technology has been widely demonstrated to remove persistent organic compounds and microorganisms in water. At present, the main technical barriers that impede its commercialisation remained on the post-recovery of the catalyst particles after water treatment. This paper reviews the recent R&D progresses of engineered-photocatalysts, photoreactor systems, and the process optimizations and modellings of the photooxidation processes for water treatment. A number of potential and commercial photocatalytic reactor configurations are discussed, in particular the photocatalytic membrane reactors. The effects of key photoreactor operation parameters and water quality on the photo-process performances in terms of the mineralization and disinfection are assessed. For the first time, we describe how to utilize a multi-variables optimization approach to determine the optimum operation parameters so as to enhance process performance and photooxidation efficiency. Both photomineralization and photo-disinfection kinetics and their modellings associated with the photocatalytic water treatment process are detailed. A brief discussion on the life cycle assessment for retrofitting the photocatalytic technology as an alternative waste treatment process is presented. This paper will deliver a scientific and technical overview and useful information to scientists and engineers who work in this field.
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Affiliation(s)
- Meng Nan Chong
- School of Chemical Engineering, The University of Adelaide, 5005 Adelaide, Australia
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