1
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Liu M, Lu Y, Song J, Ma B, Qiu K, Bai L, Wang Y, Chen Y, Tang Y. First-Principles Investigation on the Tunable Electronic Structures and Photocatalytic Properties of AlN/Sc 2CF 2 and GaN/Sc 2CF 2 Heterostructures. Molecules 2024; 29:3303. [PMID: 39064882 PMCID: PMC11279752 DOI: 10.3390/molecules29143303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2024] [Revised: 07/05/2024] [Accepted: 07/11/2024] [Indexed: 07/28/2024] Open
Abstract
Heterostructure catalysts are highly anticipated in the field of photocatalytic water splitting. AlN/Sc2CF2 and GaN/Sc2CF2 heterostructures are proposed in this work, and the electronic structures were revealed with the first-principles method to explore their photocatalytic properties for water splitting. The results found that the thermodynamically stable AlN/Sc2CF2 and GaN/Sc2CF2 heterostructures are indirect semiconductors with reduced band gaps of 1.75 eV and 1.84 eV, respectively. These two heterostructures have been confirmed to have type-Ⅰ band alignments, with both VBM and CBM contributed to by the Sc2CF2 layer. AlN/Sc2CF2 and GaN/Sc2CF2 heterostructures exhibit the potential for photocatalytic water splitting as their VBM and CBM stride over the redox potential of water. Gibbs free energy changes in HER occurring on AlN/Sc2CF2 and GaN/Sc2CF2 heterostructures are as low as -0.31 eV and -0.59 eV, respectively. The Gibbs free energy change in HER on the AlN (GaN) layer is much lower than that on the Sc2CF2 surface, owing to the stronger adsorption of H on AlN (GaN). The AlN/Sc2CF2 and GaN/Sc2CF2 heterostructures possess significant improvements in absorption range and intensity compared to monolayered AlN, GaN, and Sc2CF2. In addition, the band gaps, edge positions, and absorption properties of AlN/Sc2CF2 and GaN/Sc2CF2 heterostructures can be effectively tuned with strains. All the results indicate that AlN/Sc2CF2 and GaN/Sc2CF2 heterostructures are suitable catalysts for photocatalytic water splitting.
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Affiliation(s)
- Meiping Liu
- School of Intelligent Manufacturing, Huanghuai University, Zhumadian 463000, China
| | - Yidan Lu
- Henan Key Laboratory of Smart Lighting, School of Energy Engineering, Huanghuai University, Zhumadian 463000, China
| | - Jun Song
- Henan Key Laboratory of Smart Lighting, School of Energy Engineering, Huanghuai University, Zhumadian 463000, China
| | - Benyuan Ma
- Henan Key Laboratory of Smart Lighting, School of Energy Engineering, Huanghuai University, Zhumadian 463000, China
| | - Kangwen Qiu
- Henan Key Laboratory of Smart Lighting, School of Energy Engineering, Huanghuai University, Zhumadian 463000, China
| | - Liuyang Bai
- Henan Key Laboratory of Smart Lighting, School of Energy Engineering, Huanghuai University, Zhumadian 463000, China
| | - Yinling Wang
- Henan Key Laboratory of Smart Lighting, School of Energy Engineering, Huanghuai University, Zhumadian 463000, China
| | - Yuanyuan Chen
- Polymer, Recycling, Industrial, Sustainability and Manufacturing (PRISM), Technological University of the Shannon: Midlands Midwest, N37 HD68 Athlone, Ireland
| | - Yong Tang
- Henan Key Laboratory of Smart Lighting, School of Energy Engineering, Huanghuai University, Zhumadian 463000, China
- Polymer, Recycling, Industrial, Sustainability and Manufacturing (PRISM), Technological University of the Shannon: Midlands Midwest, N37 HD68 Athlone, Ireland
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2
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Verduci R, Creazzo F, Tavella F, Abate S, Ampelli C, Luber S, Perathoner S, Cassone G, Centi G, D'Angelo G. Water Structure in the First Layers on TiO 2: A Key Factor for Boosting Solar-Driven Water-Splitting Performances. J Am Chem Soc 2024; 146:18061-18073. [PMID: 38909313 DOI: 10.1021/jacs.4c05042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/24/2024]
Abstract
The water hydrogen-bonded network is strongly perturbed in the first layers in contact with the semiconductor surface. Even though this aspect influences the outer-sphere electron transfer, it was not recognized that it is a crucial factor impacting the solar-driven water-splitting performances. To fill this gap, we have selected two TiO2 anatase samples (with and without B-doping), and by extensive experimental and computational investigations, we have demonstrated that the remarkable 5-fold increase in water-splitting photoactivity of the B-doped sample cannot be ascribed to effects typically associated to enhanced photocatalytic properties, such as band gap, heterojunctions, crystal facets, and other aspects. Studying these samples by combining FTIR measurements under controlled humidity with first-principles simulations sheds light on the role and nature of the first-layer water structure in contact with the photocatalyst surfaces. It turns out that the doping hampers the percolation of tetrahedrally coordinated water molecules while enhancing the population of topological H-bond defects forming approximately linear H-bonded chains. This work unveils how doping the semiconductor surface affects the local electric field, determining the water splitting rate by influencing the H-bond topologies in the first water layers. This evidence opens new prospects for designing efficient photocatalysts for water splitting.
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Affiliation(s)
- Rosaria Verduci
- Department of Mathematical and Computational Sciences, Physical Science and Earth Science (MIFT), University of Messina, V.le F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Fabrizio Creazzo
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Francesco Tavella
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences (ChiBioFarAm), University of Messina, ERIC aisbl and CASPE/INSTM, 98166 Messina, Italy
| | - Salvatore Abate
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences (ChiBioFarAm), University of Messina, ERIC aisbl and CASPE/INSTM, 98166 Messina, Italy
| | - Claudio Ampelli
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences (ChiBioFarAm), University of Messina, ERIC aisbl and CASPE/INSTM, 98166 Messina, Italy
| | - Sandra Luber
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Siglinda Perathoner
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences (ChiBioFarAm), University of Messina, ERIC aisbl and CASPE/INSTM, 98166 Messina, Italy
| | - Giuseppe Cassone
- Institute for Chemical-Physical Processes, National Research Council of Italy (IPCF-CNR), Viale F. Stagno d'Alcontres 37, 98158 Messina, Italy
| | - Gabriele Centi
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences (ChiBioFarAm), University of Messina, ERIC aisbl and CASPE/INSTM, 98166 Messina, Italy
| | - Giovanna D'Angelo
- Department of Mathematical and Computational Sciences, Physical Science and Earth Science (MIFT), University of Messina, V.le F. Stagno d'Alcontres 31, 98166 Messina, Italy
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3
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Takhar D, Birajdar B, Ghosh RK. Dual functionality of the BiN monolayer: unraveling its photocatalytic and piezocatalytic water splitting properties. Phys Chem Chem Phys 2024; 26:16261-16272. [PMID: 38804603 DOI: 10.1039/d4cp01047g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
To achieve scalable and economically viable green hydrogen (H2) production, the photocatalytic and piezocatalytic processes are promising methods. The key to successful overall water splitting (OWS) for H2 production in these processes is using suitable semiconductor catalysts with appropriate band edge potentials, efficient optical absorption, higher mechanical flexibility, and piezoelectric coefficients. Thus, we explore the bismuth nitride (BiN) monolayer using density functional theory simulations, revealing intriguing catalytic properties. The BiN monolayer is a semiconductor with an indirect electronic bandgap (Eg) of 2.08 eV and displays excellent visible light absorption (approximately 105 cm-1). Detailed analyses show that the band edges satisfy the redox potential for photocatalytic OWS via biaxial strain engineering and pH variation. Notably, the solar to hydrogen conversion efficiency (ηSTH) for the BiN monolayer can reach 17.18%, which exceeds the 10% efficiency limit of photocatalysts for economical green H2 production. The obtained in-plane piezoelectric coefficient of e11 = 16.18 Å C m-1 is superior to widely studied 2D materials. Moreover, the generated piezopotential under oscillatory strain stands at 28.34 V, which can initiate the water redox reaction via the piezocatalytic mechanism. This originates from the mechanical flexibility coupled with higher piezoelectric coefficients. The result highlights the BiN monolayer's potential application in photocatalytic, piezocatalytic, and photo-piezo-catalytic OWS.
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Affiliation(s)
- Devender Takhar
- Special Centre for Nanoscience, Jawaharlal Nehru University, Delhi 110067, India
| | - Balaji Birajdar
- Special Centre for Nanoscience, Jawaharlal Nehru University, Delhi 110067, India
| | - Ram Krishna Ghosh
- Department of Electronics and Communication Engineering, Indraprastha Institute of Information Technology, Delhi 110020, India.
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4
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Shin J, Lee J, Xiao X, Yu T. Enhancing catalytic activity of TiO 2 nanoparticles through acid treatment in Eosin-Y sensitized photohydrogen evolution reaction system. Heliyon 2024; 10:e30765. [PMID: 38765064 PMCID: PMC11101847 DOI: 10.1016/j.heliyon.2024.e30765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 03/28/2024] [Accepted: 05/03/2024] [Indexed: 05/21/2024] Open
Abstract
Light-driven water splitting has gained increasing attention as an eco-friendly method for hydrogen production. There is a pressing need to enhance the performance of catalysts for the commercial viability of this reaction. Many methods have been proposed to improve catalyst performance; however, an economical and straightforward approach remains a priority. This paper presents an uncomplicated technique called acid treatment, which augments the catalytic performance of nanoparticles. The method promotes a change in the catalytic reactivity by causing a deficit in electron density of Ti and O on the surface of TiO2 nanoparticles without altering their size, morphology, or crystal structure. In the Eosin Y sensitized photocatalytic hydrogen production system, nitric acid treated TiO2 (16.95 μmol/g) exhibited 1.5 times the hydrogen production compared to bare TiO2 (11.15 μmol/g).
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Affiliation(s)
- Jiwoo Shin
- Department of Chemical Engineering, College of Engineering, Integrated Engineering Major, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Jaeyoung Lee
- Department of Chemical Engineering, College of Engineering, Integrated Engineering Major, Kyung Hee University, Yongin, 17104, Republic of Korea
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, United States
| | - Xiangyun Xiao
- Department of Chemical Engineering, College of Engineering, Integrated Engineering Major, Kyung Hee University, Yongin, 17104, Republic of Korea
- Faculty of Materials Science and Engineering/Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, PR China
| | - Taekyung Yu
- Department of Chemical Engineering, College of Engineering, Integrated Engineering Major, Kyung Hee University, Yongin, 17104, Republic of Korea
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5
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Rokicka-Konieczna P, Morawski AW. Photocatalytic Bacterial Destruction and Mineralization by TiO 2-Based Photocatalysts: A Mini Review. Molecules 2024; 29:2221. [PMID: 38792082 PMCID: PMC11123885 DOI: 10.3390/molecules29102221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 05/07/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024] Open
Abstract
This work presents an overview of the reports on the bacterial cell photocatalytic destruction and mineralization process in the presence of TiO2-based photocatalysts. The presented research included experiments conducted in air and water. Numerous works confirmed that a photocatalytic process with TiO2 led to bacteria and their organic residues' mineralization. Additionally, based on the obtained results, a possible two-stage mechanism of photocatalytic mineralization in the presence of TiO2-based materials was proposed. To help future studies, challenges of photocatalytic microorganism mineralization are also proposed. There are some aspects that need to be addressed, such as the lack of standardization of conducted research or relatively small amount of research on photocatalytic microorganism mineralization. According to our best knowledge, in the available literature, no work regarding a summary of previous research on photocatalytic bacterial mineralization process was found.
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Affiliation(s)
- Paulina Rokicka-Konieczna
- Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego 10, 70-322 Szczecin, Poland;
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6
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Gusarov S. Advances in Computational Methods for Modeling Photocatalytic Reactions: A Review of Recent Developments. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2119. [PMID: 38730926 PMCID: PMC11085804 DOI: 10.3390/ma17092119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 04/19/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024]
Abstract
Photocatalysis is a fascinating process in which a photocatalyst plays a pivotal role in driving a chemical reaction when exposed to light. Its capacity to harness light energy triggers a cascade of reactions that lead to the formation of intermediate compounds, culminating in the desired final product(s). The essence of this process is the interaction between the photocatalyst's excited state and its specific interactions with reactants, resulting in the creation of intermediates. The process's appeal is further enhanced by its cyclic nature-the photocatalyst is rejuvenated after each cycle, ensuring ongoing and sustainable catalytic action. Nevertheless, comprehending the photocatalytic process through the modeling of photoactive materials and molecular devices demands advanced computational techniques founded on effective quantum chemistry methods, multiscale modeling, and machine learning. This review analyzes contemporary theoretical methods, spanning a range of lengths and accuracy scales, and assesses the strengths and limitations of these methods. It also explores the future challenges in modeling complex nano-photocatalysts, underscoring the necessity of integrating various methods hierarchically to optimize resource distribution across different scales. Additionally, the discussion includes the role of excited state chemistry, a crucial element in understanding photocatalysis.
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Affiliation(s)
- Sergey Gusarov
- Digital Technologies Research Centre, National Research Council Canada, Ottawa, ON K1A 0R6, Canada
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7
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Backus EHG, Hosseinpour S, Ramanan C, Sun S, Schlegel SJ, Zelenka M, Jia X, Gebhard M, Devi A, Wang HI, Bonn M. Ultrafast Surface-Specific Spectroscopy of Water at a Photoexcited TiO 2 Model Water-Splitting Photocatalyst. Angew Chem Int Ed Engl 2024; 63:e202312123. [PMID: 38010868 DOI: 10.1002/anie.202312123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/31/2023] [Accepted: 11/24/2023] [Indexed: 11/29/2023]
Abstract
A critical step in photocatalytic water dissociation is the hole-mediated oxidation reaction. Molecular-level insights into the mechanism of this complex reaction under realistic conditions with high temporal resolution are highly desirable. Here, we use femtosecond time-resolved, surface-specific vibrational sum frequency generation spectroscopy to study the photo-induced reaction directly at the interface of the photocatalyst TiO2 in contact with liquid water at room temperature. Thanks to the inherent surface specificity of the spectroscopic method, we can follow the reaction of solely the interfacial water molecules directly at the interface at timescales on which the reaction takes place. Following the generation of holes at the surface immediately after photoexcitation of the catalyst with UV light, water dissociation occurs on a sub-20 ps timescale. The reaction mechanism is similar at pH 3 and 11. In both cases, we observe the conversion of H2 O into Ti-OH groups and the deprotonation of pre-existing Ti-OH groups. This study provides unique experimental insights into the early steps of the photo-induced dissociation processes at the photocatalyst-water interface, relevant to the design of improved photocatalysts.
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Affiliation(s)
- Ellen H G Backus
- University of Vienna, Faculty of Chemistry, Institute of Physical Chemistry, Währinger Straße 42, 1090, Vienna, Austria
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Saman Hosseinpour
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
- Current address: Institute of Particle Technology (LFG), Friedrich-Alexander-Universität-Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058, Erlangen, Germany
| | - Charusheela Ramanan
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
- Department of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands
| | - Shumei Sun
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Simon J Schlegel
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Moritz Zelenka
- University of Vienna, Faculty of Chemistry, Institute of Physical Chemistry, Währinger Straße 42, 1090, Vienna, Austria
| | - Xiaoyu Jia
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Maximilian Gebhard
- Inorganic Materials Chemistry, Ruhr-University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Anjana Devi
- Inorganic Materials Chemistry, Ruhr-University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Hai I Wang
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
- Nanophotonics, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC, Utrecht, The Netherlands
| | - Mischa Bonn
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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8
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Ajmal Z, Ul Haq M, Zaman S, Al-Muhanna MK, Kumar A, Fadhali MM, Hassine SBH, Qasim M, Alshammari KF, Ashraf GA, Qadeer A, Murtaza A, Al-Sulaimi S, Zeng H. Addressing the synchronized impact of a novel strontium titanium over copolymerized carbon nitride for proficient solar-driven hydrogen evolution. J Colloid Interface Sci 2024; 655:886-898. [PMID: 37979294 DOI: 10.1016/j.jcis.2023.10.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 10/01/2023] [Accepted: 10/05/2023] [Indexed: 11/20/2023]
Abstract
Currently, novel technologies are highly prerequisite as an outstanding approach in the field of photocatalytic water splitting (PWS). Previous research has shown that copolymerization technology could improve the photocatalytic performance of pristine carbon nitride (CN) more efficiently. As this technology further allows the charge carrier recombination constraints, due to novel monomer-incorporated highly abundant surface-active sites of metals in polymeric carbon nitride-based heterojunction. However, in present study, a novel previously unexplored thiophenedicarboxaldehyde (TAL) conjugated, strontium-titanium (SrTiO3) induced and CN based heterojunction, i.e., SrTiO3/CN-TAL10.0, was prepared for solar-driven hydrogen evolution reaction (HER). This heterojunction effectively enables the proficient isolation of photoinduced charge carriers and enhanced the charge transport over the surface junction, by enhancing the optical absorption range and average lifetime of photogenerated charges. The incorporation of TAL within the structure of CN via copolymerization highly increases the photocatalytic activity, as well as maintaining its photostability performance. The SrTiO3 concentration and the proportion of TAL among CN can be precisely controlled to provide the optimal photocatalytic efficiency with a maximum HER of 285.9 µmol/h under visible light (λ = 420 nm). Based on these results, our optical analysis shows that coupling of SrTiO3 and TAL monomer in the structure of CN considerably reduce the band gap of superior sample from (3.42 to 2.66 eV), thereby, signifying the outstanding photocatalytic performance of SrTiO3/CN-TAL10.0. Thus, this study provide a new guideline in order to develop the multidimensional photocatalysts with proper functioning for sustainable energy conversion and production.
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Affiliation(s)
- Zeeshan Ajmal
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Advanced Fluorine-Containing Materials, College of Chemistry and Material Science, Zhejiang Normal University, Jinhua 321004, Zhejiang, China; School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, 710072 Xian, China.
| | - Mahmood Ul Haq
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Advanced Fluorine-Containing Materials, College of Chemistry and Material Science, Zhejiang Normal University, Jinhua 321004, Zhejiang, China
| | - Shahid Zaman
- Institut d'Innovations en Écomatériaux, Écoproduits et Écoénergies, Université du Québec à Trois-Rivières (UQTR), 3351 boul. des forges, Trois-Rivières, Québec G8Z 4M3, Canada
| | - M K Al-Muhanna
- The Material Science Research Institute, King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Saudi Arabia
| | - Anuj Kumar
- Nanotechnology Research Laboratory, GLA, University, Mathura, Uttar Pradesh 281406, India
| | - Mohammed M Fadhali
- Department of Physics, Faculty of Science, Jazan University, Jazan 45142, Saudi Arabia
| | - Siwar Ben Hadj Hassine
- Department of Computer Science, College of Science and Arts at Muhayel, King Khalid University, Saudi Arabia
| | - Muhammas Qasim
- School of Electronic Engineering, Jiujiang University, Jiujiang 332005, China
| | - K F Alshammari
- Department of Criminal Justice and Forensics, King Fahad Security College, Riyadh 11461, Saudi Arabia
| | - Ghulam Abbas Ashraf
- College of Environment, Hohai University, Nanjing 210098, China; New Uzbekistan University, Mustaqillik Ave. 54, Tashkent 100007, Uzbekistan.
| | - Abdul Qadeer
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, China
| | - Adil Murtaza
- MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behaviour of Materials, Key Laboratory of Advanced Functional Materials and Mesoscopic Physics of Shaanxi Province, School of Physics, Xian Jiaotong University, 710049 Xian, Shaanxi, China.
| | | | - Huaqiang Zeng
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, 710072 Xian, China.
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9
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Huang X, Li C, Wei T, Liu N, Yao Y, Wang Z, Hu Y, Fang Q, Guan S, Xue Y, Wu T, Zhang T, Tang M. Oropharyngeal aspirated Ag/TiO 2 nanohybrids: Transformation, distribution and toxicity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168309. [PMID: 37944607 DOI: 10.1016/j.scitotenv.2023.168309] [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: 09/11/2023] [Revised: 10/30/2023] [Accepted: 11/01/2023] [Indexed: 11/12/2023]
Abstract
The wide application of Ag-loaded TiO2 nanohybrids photocatalysts on environment and energy increases the lung exposure risk to humans. Ag/TiO2 nanohybrids inhalation can cause pulmonary toxicity, and there are concerns about whether the loaded silver can be released and cause toxic effects on extrapulmonary organs. Therefore, in this study, the possible biotransformation, biodistribution, and toxicity of oropharyngeal aspirated Ag/TiO2 nanohybrids were investigated first time in vitro and in vivo to answer this question. Firstly, the results of biotransformation showed that the ultrafine silver nanoparticles (~3.5 nm, 2 w/w%) loaded on the surface of nano-TiO2 (~25 nm) could agglomerate and release in Gamble's solution, and the hydrodynamic diameter of the nanohybrids agglomerates increased from about 200 nm to 1 μm. Furthermore, after exposure 10 mg/kg Ag/TiO2 nanohybrids to C57BL/6 J male mice by oropharyngeal aspiration weekly, the biodistribution results showed that the released silver could result in blood, liver, and brain distribution within 28 d. Finally, body weight, organ coefficient, blood biochemical indicators of liver and kidney function, and pathological images demonstrated that although silver could release and lead to extrapulmonary organ distribution, it did not cause obvious extrapulmonary organ damage. The original lung was still the main toxicity and accumulation target organ of Ag/TiO2 nanohybrids, which mainly manifested as the pro-inflammatory and pro-fibrotic effects that should be focused on in the future. Therefore, this study is of great significance in evaluating the safety of Ag-loaded TiO2 nanoparticles and predicting their toxic mechanisms.
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Affiliation(s)
- Xiaoquan Huang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Congcong Li
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Tingting Wei
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Na Liu
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Yongshuai Yao
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Zhihui Wang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Yuanyuan Hu
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Qing Fang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Shujing Guan
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Yuying Xue
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Tianshu Wu
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Ting Zhang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China
| | - Meng Tang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, PR China.
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10
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Erfan NA, Mahmoud MS, Kim HY, Barakat NAM. Synergistic doping with Ag, CdO, and ZnO to overcome electron-hole recombination in TiO 2 photocatalysis for effective water photo splitting reaction. Front Chem 2023; 11:1301172. [PMID: 38025057 PMCID: PMC10661415 DOI: 10.3389/fchem.2023.1301172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 10/23/2023] [Indexed: 12/01/2023] Open
Abstract
This manuscript is dedicated to a comprehensive exploration of the multifaceted challenge of fast electron-hole recombination in titanium dioxide photocatalysis, with a primary focus on its critical role in advancing the field of water photo splitting. To address this challenge, three prominent approaches-Schottky barriers, Z-scheme systems, and type II heterojunctions-were rigorously investigated for their potential to ameliorate TiO2's photocatalytic performance toward water photo splitting. Three distinct dopants-silver, cadmium oxide, and zinc oxide-were strategically employed. This research also delved into the dynamic interplay between these dopants, analyzing the synergetic effects that arise from binary and tertiary doping configurations. The results concluded that incorporation of Ag, CdO, and ZnO dopants effectively countered the fast electron-hole recombination problem in TiO2 NPs. Ag emerged as a critical contributor at higher temperatures, significantly enhancing photocatalytic performance. The photocatalytic system exhibited a departure from Arrhenius behavior, with an optimal temperature of 40°C. Binary doping systems, particularly those combining CdO and ZnO, demonstrated exceptional photocatalytic activity at lower temperatures. However, the ternary doping configuration involving Ag, CdO, and ZnO proved to be the most promising, surpassing many functional materials. In sum, this study offers valuable insights into how Schottky barriers, Z-scheme systems, and type II heterojunctions, in conjunction with specific dopants, can overcome the electron-hole recombination challenge in TiO2-based photocatalysis. The results underscore the potential of the proposed ternary doping system to revolutionize photocatalytic water splitting for efficient green hydrogen production, significantly advancing the field's understanding and potential for sustainable energy applications.
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Affiliation(s)
- Nehal A. Erfan
- Chemical Engineering Department, Minia University, El-Minia, Egypt
| | - Mohamed S. Mahmoud
- Chemical Engineering Department, Minia University, El-Minia, Egypt
- Department of Engineering, University of Technology and Applied Sciences, Suhar, Oman
| | - Hak Yong Kim
- Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju, Republic of Korea
- Department of Organic Materials and Fiber Engineering, Jeonbuk National University, Jeonju, Republic of Korea
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11
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Hojamberdiev M, Vargas R, Zhang F, Teshima K, Lerch M. Perovskite BaTaO 2 N: From Materials Synthesis to Solar Water Splitting. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2305179. [PMID: 37852947 PMCID: PMC10667847 DOI: 10.1002/advs.202305179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/16/2023] [Indexed: 10/20/2023]
Abstract
Barium tantalum oxynitride (BaTaO2 N), as a member of an emerging class of perovskite oxynitrides, is regarded as a promising inorganic material for solar water splitting because of its small band gap, visible light absorption, and suitable band edge potentials for overall water splitting in the absence of an external bias. However, BaTaO2 N still exhibits poor water-splitting performance that is susceptible to its synthetic history, surface states, recombination process, and instability. This review provides a comprehensive summary of previous progress, current advances, existing challenges, and future perspectives of BaTaO2 N for solar water splitting. A particular emphasis is given to highlighting the principles of photoelectrochemical (PEC) water splitting, classic and emerging photocatalysts for oxygen evolution reactions, and the crystal and electronic structures, dielectric, ferroelectric, and piezoelectric properties, synthesis routes, and thin-film fabrication of BaTaO2 N. Various strategies to achieve enhanced water-splitting performance of BaTaO2 N, such as reducing the surface and bulk defect density, engineering the crystal facets, tailoring the particle morphology, size, and porosity, cation doping, creating the solid solutions, forming the heterostructures and heterojunctions, designing the photoelectrochemical cells, and loading suitable cocatalysts are discussed. Also, the avenues for further investigation and the prospects of using BaTaO2 N in solar water splitting are presented.
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Affiliation(s)
- Mirabbos Hojamberdiev
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Ronald Vargas
- Instituto Tecnológico de Chascomús (INTECH) – Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)Universidad Nacional de San Martín (UNSAM)Avenida Intendente Marino, Km 8,2, (B7130IWA)ChascomúsProvincia de Buenos AiresArgentina
- Escuela de Bio y NanotecnologíasUniversidad Nacional de San Martín (UNSAM)Avenida Intendente Marino, Km 8,2, (B7130IWA)ChascomúsProvincia de Buenos AiresArgentina
| | - Fuxiang Zhang
- State Key Laboratory of CatalysisiChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian National Laboratory for Clean EnergyDalian116023P.R. China
| | - Katsuya Teshima
- Department of Materials ChemistryShinshu University4‐17‐1 WakasatoNagano3808553Japan
- Research Initiative for Supra‐MaterialsShinshu University4‐17‐1 WakasatoNagano3808553Japan
| | - Martin Lerch
- Institut für ChemieTechnische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
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12
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Chu X, Santos-Carballal D, de Leeuw NH. Exploring the Redox Properties of the Low-Miller Index Surfaces of Copper Tungstate (CuWO 4): Evaluating the Impact of the Environmental Conditions on the Water Splitting and Carbon Dioxide Reduction Processes. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:18944-18961. [PMID: 37791103 PMCID: PMC10544046 DOI: 10.1021/acs.jpcc.3c04413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/25/2023] [Indexed: 10/05/2023]
Abstract
Photocatalysis has gained significant attention and interest as an environmentally friendly and sustainable approach to the production of hydrogen through water splitting and the reduction and conversion of CO2. Copper tungstate (CuWO4) is a highly promising candidate for these applications owing to its appropriate bandgap and superior stability under different conditions. However, the redox behavior of the CuWO4 surfaces under different environments and their impact on the morphology of the material nanoparticles, as well as the electronic properties, remain poorly understood. In this study, we have employed density functional theory calculations to investigate the properties of the bulk and pristine surfaces of CuWO4 and how the latter are impacted by oxygen chemisorption under the conditions required for photocatalytic water splitting and carbon dioxide reduction processes. We have calculated the lattice parameters and electronic properties of the bulk phase, as well as the surface energies of all possible nonpolar, stoichiometric, and symmetric terminations of the seven low-Miller index surfaces and found that the (010) and (110) facets are the thermodynamically most stable. The surface-phase diagrams were used to derive the equilibrium crystal morphologies, which show that the pristine (010) surface is prominent under synthesis and room conditions. Our crystal morphologies suggest that the partially oxidized (110) surface and the partially reduced (011) surface may play an important role in the photocatalytic splitting of water and CO2 conversion, respectively. Our results provide a comprehensive understanding of the CuWO4 surfaces under the conditions of important photocatalytic applications.
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Affiliation(s)
- Xuan Chu
- School
of Chemistry, University of Leeds, Leeds LS2 9JT, U.K.
| | | | - Nora H. de Leeuw
- School
of Chemistry, University of Leeds, Leeds LS2 9JT, U.K.
- Department
of Earth Sciences, Utrecht University, Princetonplein 8A, Utrecht 3584 CD, The Netherlands
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13
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Perera DC, Rasaiah JC. Computational Study of H 2O Adsorption, Hydrolysis, and Water Splitting on (ZnO) 3 Nanoclusters Deposited on Graphene and Graphene Oxides. ACS OMEGA 2023; 8:32185-32203. [PMID: 37692258 PMCID: PMC10483521 DOI: 10.1021/acsomega.3c04882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 07/25/2023] [Indexed: 09/12/2023]
Abstract
Graphene and graphene oxide (GO)-based metal oxides could play an important role in using metal oxide like zinc oxide (ZnO) as photocatalysts to split water. The π conjugation structure of GO shows greater electron mobility and could enhance the photocatalytic performance of the bare ZnO catalyst by increasing the electron-hole separation. In this work, we use density functional theory (DFT) with the B3LYP exchange functional and DGDZVP2 basis set to study the impact of adsorbing (ZnO)3 nanoparticles on graphene and four different GO models (GO1, GO2, GO4, and GO5) on the hydration and hydrolysis of water that precedes water splitting to produce H2 and O2 atoms in the gas phase and compare them with our previous studies on the bare catalyst in the absence of the substrate. The potential energy curves and activation energies are similar, but the triplet states are lower in energy than the singlet states in contrast to the bare (ZnO)3 catalyst. We extend our calculations to water splitting from the hydrolyzed (ZnO)3 on GO1 (GO1-(ZnO)3). The triplet state energy remains lower than the singlet state energy, and hydrogen production precedes the formation of oxygen, but there is no energy inter-crossing during the formation of O2 that occurs in the absence of a GO1 substrate. Although the hydrolysis reaction pathway follows similar steps in both the bare and GO1-(ZnO)3, water splitting with (ZnO)3 absorbed on the GO1 substrate skips two steps as it proceeds toward the production of the second H2. The production of two hydrogen molecules precedes oxygen formation during water splitting, and the first Zn-H bond formation step is the rate-determining step. The ZnO trimer deposited on GO systems could be potentially attractive nanocatalysts for water splitting.
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Affiliation(s)
- Duwage C. Perera
- Department of Chemistry, University of Maine, Orono, Maine 04469, United States
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14
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Rafique M, Hajra S, Irshad M, Usman M, Imran M, Assiri MA, Ashraf WM. Hydrogen Production Using TiO 2-Based Photocatalysts: A Comprehensive Review. ACS OMEGA 2023; 8:25640-25648. [PMID: 37521614 PMCID: PMC10373472 DOI: 10.1021/acsomega.3c00963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 07/06/2023] [Indexed: 08/01/2023]
Abstract
Titanium dioxide (TiO2) is one of the most widely used photocatalysts due to its physical and chemical properties. In this study, hydrogen energy production using TiO2- and titanate-based photocatalysts is discussed along with the pros and cons. The mechanism of the photocatalysis has been elaborated to pinpoint the photocatalyst for better performance. The chief characteristics and limitations of the TiO2 photocatalysts have been assessed. Further, TiO2-based photocatalysts modified with a transition metal, transition metal oxide, noble metal, graphitic carbon nitride, graphene, etc. have been reviewed. This study will provide a basic understanding to beginners and detailed knowledge to experts in the field to optimize the TiO2-based photocatalysts for hydrogen production.
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Affiliation(s)
- Muhammad Rafique
- Department
of Physics, University of Sahiwal, Sahiwal, Punjab 57000, Pakistan
| | - Syeda Hajra
- Department
of Physics, Faculty of Science, University
of Gujrat, Gujrat, Punjab 50700, Pakistan
| | - Muneeb Irshad
- Department
of Physics, University of Engineering and
Technology, Lahore, Punjab 54890, Pakistan
| | - Muhammad Usman
- Department
of Mechanical Engineering, University of
Engineering and Technology, Lahore, Punjab 54890, Pakistan
| | - Muhammad Imran
- Research
Centre for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61514, Saudi Arabia
- Department
of Chemistry, Faculty of Science, King Khalid
University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Mohammad A. Assiri
- Research
Centre for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61514, Saudi Arabia
- Department
of Chemistry, Faculty of Science, King Khalid
University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Waqar Muhammad Ashraf
- The
Sargent Centre for Process Systems Engineering, Department of Chemical
Engineering, University College London, London WC1E 6BT, U.K.
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15
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Pascariu P, Gherasim C, Airinei A. Metal Oxide Nanostructures (MONs) as Photocatalysts for Ciprofloxacin Degradation. Int J Mol Sci 2023; 24:ijms24119564. [PMID: 37298517 DOI: 10.3390/ijms24119564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/24/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023] Open
Abstract
In recent years, organic pollutants have become a global problem due to their negative impact on human health and the environment. Photocatalysis is one of the most promising methods for the removal of organic pollutants from wastewater, and oxide semiconductor materials have proven to be among the best in this regard. This paper presents the evolution of the development of metal oxide nanostructures (MONs) as photocatalysts for ciprofloxacin degradation. It begins with an overview of the role of these materials in photocatalysis; then, it discusses methods of obtaining them. Then, a detailed review of the most important oxide semiconductors (ZnO, TiO2, CuO, etc.) and alternatives for improving their photocatalytic performance is provided. Finally, a study of the degradation of ciprofloxacin in the presence of oxide semiconductor materials and the main factors affecting photocatalytic degradation is carried out. It is well known that antibiotics (in this case, ciprofloxacin) are toxic and non-biodegradable, which can pose a threat to the environment and human health. Antibiotic residues have several negative impacts, including antibiotic resistance and disruption of photosynthetic processes.
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Affiliation(s)
- Petronela Pascariu
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Carmen Gherasim
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Anton Airinei
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
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16
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Estévez Ruiz EP, Lago JL, Thirumuruganandham SP. Experimental Studies on TiO 2 NT with Metal Dopants through Co-Precipitation, Sol-Gel, Hydrothermal Scheme and Corresponding Computational Molecular Evaluations. MATERIALS (BASEL, SWITZERLAND) 2023; 16:3076. [PMID: 37109913 PMCID: PMC10143655 DOI: 10.3390/ma16083076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 03/19/2023] [Accepted: 03/23/2023] [Indexed: 06/19/2023]
Abstract
In the last decade, TiO2 nanotubes have attracted the attention of the scientific community and industry due to their exceptional photocatalytic properties, opening a wide range of additional applications in the fields of renewable energy, sensors, supercapacitors, and the pharmaceutical industry. However, their use is limited because their band gap is tied to the visible light spectrum. Therefore, it is essential to dope them with metals to extend their physicochemical advantages. In this review, we provide a brief overview of the preparation of metal-doped TiO2 nanotubes. We address hydrothermal and alteration methods that have been used to study the effects of different metal dopants on the structural, morphological, and optoelectrical properties of anatase and rutile nanotubes. The progress of DFT studies on the metal doping of TiO2 nanoparticles is discussed. In addition, the traditional models and their confirmation of the results of the experiment with TiO2 nanotubes are reviewed, as well as the use of TNT in various applications and the future prospects for its development in other fields. We focus on the comprehensive analysis and practical significance of the development of TiO2 hybrid materials and the need for a better understanding of the structural-chemical properties of anatase TiO2 nanotubes with metal doping for ion storage devices such as batteries.
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Affiliation(s)
- Eduardo Patricio Estévez Ruiz
- Centro de Investigación de Ciencias Humanas y de la Educación (CICHE), Universidad Indoamérica, Ambato 180103, Ecuador
- Grupo de Polímeros, Departamento de Física y Ciencias de la Tierra, Escuela Universitaria Politécnica, Universidade da Coruña, 15471 Ferrol, Spain
| | - Joaquín López Lago
- Grupo de Polímeros, Departamento de Física y Ciencias de la Tierra, Escuela Universitaria Politécnica, Universidade da Coruña, 15471 Ferrol, Spain
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17
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Jakimińska A, Spilarewicz K, Macyk W. Phototransformations of TiO 2/Ag 2O composites and their influence on photocatalytic water splitting accompanied by methanol photoreforming. NANOSCALE ADVANCES 2023; 5:1926-1935. [PMID: 36998646 PMCID: PMC10044581 DOI: 10.1039/d2na00910b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 01/19/2023] [Indexed: 06/19/2023]
Abstract
This work aimed to revise the mechanism of photocatalytic activity of the TiO2/Ag2O system in photocatalytic water splitting accompanied by methanol photoreforming. The transformation of Ag2O into silver nanoparticles (AgNPs) during photocatalytic water splitting/methanol photoreforming was monitored using XRD, XPS, SEM, UV-vis, and DRS techniques. The impact of AgNPs, grown on TiO2, on its optoelectronic properties was analysed through inter alia spectroelectrochemical measurements. The photoreduced material exhibited a significantly shifted position of the TiO2 conduction band edge. Surface photovoltage measurements revealed the lack of photoinduced exchange of electrons between TiO2 and Ag2O, indicating the absence of an efficient p-n junction. Furthermore, the impact of chemical and structural changes in the photocatalytic system on the production of CO and CO2 from methanol photoreforming was analysed. It was found that fully formed AgNPs exhibit improved efficiency in the production of H2, whereas the Ag2O phototransformation, resulting in the growth of AgNPs, promotes simultaneously ongoing photoreforming of methanol.
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Affiliation(s)
- Anna Jakimińska
- Faculty of Chemistry, Jagiellonian University ul. Gronostajowa 2 Kraków 30-387 Poland
| | - Kaja Spilarewicz
- Faculty of Chemistry, Jagiellonian University ul. Gronostajowa 2 Kraków 30-387 Poland
| | - Wojciech Macyk
- Faculty of Chemistry, Jagiellonian University ul. Gronostajowa 2 Kraków 30-387 Poland
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18
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Ma R, O'Connor CR, Collinge G, Allec SI, Lee MS, Dohnálek Z. The Role of Surface Hydroxyls in the Mobility of Carboxylates on Surfaces: Dynamics of Acetate on Anatase TiO 2(101). J Phys Chem Lett 2023; 14:2542-2550. [PMID: 36877161 DOI: 10.1021/acs.jpclett.3c00175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The dynamics of reactive intermediates are important in catalysis for understanding transient species, which can drive reactivity and the transport of species to reaction centers. In particular, the interplay between surface-bound carboxylic acids and carboxylates is important for numerous chemical transformations, including CO2 hydrogenation and ketonization. Here, we investigate the dynamics of acetic acid on anatase TiO2(101) using scanning tunneling microscopy experiments and density functional theory calculations. We demonstrate the concomitant diffusion of bidentate acetate and a bridging hydroxyl and provide evidence for the transient formation of molecular monodentate acetic acid. The diffusion rate is strongly dependent on the position of hydroxyl and adjacent acetate(s). A facile three-step diffusion process is proposed consisting of acetate and hydroxyl recombination, acetic acid rotation, and acetic acid dissociation. This study clearly demonstrates that the dynamics of bidentate acetate could be important in forming monodentate species, which are proposed to drive selective ketonization.
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Affiliation(s)
- Runze Ma
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Christopher R O'Connor
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Gregory Collinge
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Sarah I Allec
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Mal-Soon Lee
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Zdenek Dohnálek
- Physical and Computational Sciences Directorate and Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, United States
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19
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Moustafa HM, Mahmoud MS, Nassar MM. Kinetic analysis of p-rGO/n-TiO 2 nanocomposite generated by hydrothermal technique for simultaneous photocatalytic water splitting and degradation of methylene blue dye. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:18181-18198. [PMID: 36207630 DOI: 10.1007/s11356-022-23430-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
In this study, the nanocomposites of reduced graphene oxide/TiO2 (rGO/TiO2 with different percentages) have been synthesized using a modified Hummers' method followed by hydrothermal treatment. The morphology and bonding structure of the prepared samples have been characterized by Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffractometry (XRD), and X-ray photoelectron spectroscopy (XPS). The photo-characteristic aspects of the prepared samples have been indicated by photoluminescence (PL) emission spectroscopy and ultraviolet-visible diffuse reflection spectroscopy (DRS). The photocatalytic performance of rGO/TiO2 demonstrated that it is an effective photocatalyst for methylene blue (MB) dye decomposition through illumination by a mercury lamp. Within 60 min of continuous irradiation, the nanocomposite-induced MB decomposition reached a rate of over 99%. Different MB concentrations and optimal percent loadings in catalysts have been investigated. Furthermore, the results showed that as the amount of catalyst increased, the decomposition of MB enhanced. Finally, the loading percentage of rGO with TiO2 has been studied, and an empirical equation relating the reaction rate constant until the mass of the photocatalyst and dye concentration has been proposed. The results showed that the prepared nanocomposites had good photocatalytic activity toward water splitting and photo-decomposition of MB.
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Affiliation(s)
- Hager M Moustafa
- Chemical Engineering Department, Minia University, El-Minia, 61516, Egypt
| | - Mohamed S Mahmoud
- Chemical Engineering Department, Minia University, El-Minia, 61516, Egypt.
- Department of Engineering, University of Technology and Applied Sciences, Suhar, 311, Sultanate of Oman.
| | - Mamdouh M Nassar
- Chemical Engineering Department, Minia University, El-Minia, 61516, Egypt
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20
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Lopat’eva ER, Krylov IB, Segida OO, Merkulova VM, Ilovaisky AI, Terent’ev AO. Heterogeneous Photocatalysis as a Potent Tool for Organic Synthesis: Cross-Dehydrogenative C-C Coupling of N-Heterocycles with Ethers Employing TiO 2/ N-Hydroxyphthalimide System under Visible Light. Molecules 2023; 28:molecules28030934. [PMID: 36770603 PMCID: PMC9920906 DOI: 10.3390/molecules28030934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 01/11/2023] [Accepted: 01/13/2023] [Indexed: 01/19/2023] Open
Abstract
Despite the obvious advantages of heterogeneous photocatalysts (availability, stability, recyclability, the ease of separation from products and safety) their application in organic synthesis faces serious challenges: generally low efficiency and selectivity compared to homogeneous photocatalytic systems. The development of strategies for improving the catalytic properties of semiconductor materials is the key to their introduction into organic synthesis. In the present work, a hybrid photocatalytic system involving both heterogeneous catalyst (TiO2) and homogeneous organocatalyst (N-hydroxyphthalimide, NHPI) was proposed for the cross-dehydrogenative C-C coupling of electron-deficient N-heterocycles with ethers employing t-BuOOH as the terminal oxidant. It should be noted that each of the catalysts is completely ineffective when used separately under visible light in this transformation. The occurrence of visible light absorption upon the interaction of NHPI with the TiO2 surface and the generation of reactive phthalimide-N-oxyl (PINO) radicals upon irradiation with visible light are considered to be the main factors determining the high catalytic efficiency. The proposed method is suitable for the coupling of π-deficient pyridine, quinoline, pyrazine, and quinoxaline heteroarenes with various non-activated ethers.
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21
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Cherif Y, Azzi H, Sridharan K, Ji S, Choi H, Allan MG, Benaissa S, Saidi-Bendahou K, Damptey L, Ribeiro CS, Krishnamurthy S, Nagarajan S, Maroto-Valer MM, Kuehnel MF, Pitchaimuthu S. Facile Synthesis of Gram-Scale Mesoporous Ag/TiO 2 Photocatalysts for Pharmaceutical Water Pollutant Removal and Green Hydrogen Generation. ACS OMEGA 2023; 8:1249-1261. [PMID: 36643558 PMCID: PMC9835632 DOI: 10.1021/acsomega.2c06657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
This work demonstrates a two-step gram-scale synthesis of presynthesized silver (Ag) nanoparticles impregnated with mesoporous TiO2 and evaluates their feasibility for wastewater treatment and hydrogen gas generation under natural sunlight. Paracetamol was chosen as the model pharmaceutical pollutant for evaluating photocatalytic performance. A systematic material analysis (morphology, chemical environment, optical bandgap energy) of the Ag/TiO2 photocatalyst powder was carried out, and the influence of material properties on the performance is discussed in detail. The experimental results showed that the decoration of anatase TiO2 nanoparticles (size between 80 and 100 nm) with 5 nm Ag nanoparticles (1 wt %) induced visible-light absorption and enhanced charge carrier separation. As a result, 0.01 g/L Ag/TiO2 effectively removed 99% of 0.01 g/L paracetamol in 120 min and exhibited 60% higher photocatalytic removal than pristine TiO2. Alongside paracetamol degradation, Ag/TiO2 led to the generation of 1729 μmol H2 g-1 h-1. This proof-of-concept approach for tandem pollutant degradation and hydrogen generation was further evaluated with rare earth metal (lanthanum)- and nonmetal (nitrogen)-doped TiO2, which also showed a positive response. Using a combination of ab initio calculations and our new theory model, we revealed that the enhanced photocatalytic performance of Ag/TiO2 was due to the surface Fermi-level change of TiO2 and lowered surface reaction energy barrier for water pollutant oxidation. This work opens new opportunities for exploiting tandem photocatalytic routes beyond water splitting and understanding the simultaneous reactions in metal-doped metal oxide photocatalyst systems under natural sunlight.
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Affiliation(s)
- Yassine Cherif
- Laboratoire
de Catalyse et Synthèse en Chimie Organique, Université de Tlemcen, BP 119, Tlemcen13000, Algeria
| | - Hajer Azzi
- Laboratoire
de Catalyse et Synthèse en Chimie Organique, Université de Tlemcen, BP 119, Tlemcen13000, Algeria
- Institut
des Sciences et de la Technologie, Université d’Ain
Témouchent, BP
284, 46000Ain Témouchent, Algeria
| | - Kishore Sridharan
- Department
of Nanoscience and Technology, School of Physical Sciences, University of Calicut, P. O. Thenhipalam673635, India
| | - Seulgi Ji
- Theoretical
Materials & Chemistry Group, Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939Cologne, Germany
| | - Heechae Choi
- Theoretical
Materials & Chemistry Group, Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939Cologne, Germany
| | - Michael G. Allan
- Department
of Chemistry, Swansea University, Singleton Park, SwanseaSA2 8PP, United Kingdom
| | - Sihem Benaissa
- Institut
des Sciences et de la Technologie, Université d’Ain
Témouchent, BP
284, 46000Ain Témouchent, Algeria
| | - Karima Saidi-Bendahou
- Laboratoire
de Catalyse et Synthèse en Chimie Organique, Université de Tlemcen, BP 119, Tlemcen13000, Algeria
| | - Lois Damptey
- School of
Engineering & Innovation, The Open University, Walton Hall, Milton KeynesMK7 6AA, United Kingdom
| | - Camila Silva Ribeiro
- School of
Engineering & Innovation, The Open University, Walton Hall, Milton KeynesMK7 6AA, United Kingdom
| | - Satheesh Krishnamurthy
- School of
Engineering & Innovation, The Open University, Walton Hall, Milton KeynesMK7 6AA, United Kingdom
| | - Sanjay Nagarajan
- Department
of Chemical Engineering, University of Bath, BathBA2 7AY, United Kingdom
| | - M. Mercedes Maroto-Valer
- Research
Centre for Carbon Solutions, Institute of Mechanical and Processing
Engineering, School of Engineering & Physical Science, Heriot-Watt University, EdinburghEH14 4AS, United Kingdom
| | - Moritz F. Kuehnel
- Department
of Chemistry, Swansea University, Singleton Park, SwanseaSA2 8PP, United Kingdom
- Fraunhofer
Institute for Wind Energy Systems IWES, Am Haupttor 4310, 06237Leuna, Germany
| | - Sudhagar Pitchaimuthu
- Research
Centre for Carbon Solutions, Institute of Mechanical and Processing
Engineering, School of Engineering & Physical Science, Heriot-Watt University, EdinburghEH14 4AS, United Kingdom
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22
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Nguyen HT, Bui HM, Wang YF, You SJ. Antifouling CuO@TiO 2 coating on plasma-grafted PAA/PES membrane based on photocatalysis and hydrogen peroxide activation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:12929-12943. [PMID: 36121632 DOI: 10.1007/s11356-022-23005-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 09/08/2022] [Indexed: 06/15/2023]
Abstract
Because of the small size effect leading to the high bandgap of TiO2 P25, the photocatalytic membrane using this photocatalyst has low antifouling efficiency. This study prepared CuO@TiO2 composite photocatalyst with a lower bandgap than TiO2 P25 and used it as antifouling coatings on the PES membrane with PAA intermediate adhesive layer. PAA was grafted onto the surface of the PES membranes through free radicals generated by the cold plasma treatment of the PES membrane. The composite photocatalysts were characterized by FTIR, SEM-EDS, TEM-EDS, XRD, BET, UV-Vis DRS, XPS, and ESR methods demonstrating high surface area (51.0 m2/g), decreased bandgap, and the formation of active free radicals under UV light irradiation. Under photocatalysis and hydrogen peroxide activation, the degradation of AB260 (acid blue 260) catalyzed by 10%CuO@TiO2 reached about 92% after 60 min. Besides, the photocatalytic and antifouling activities of CuO@TiO2/PAA/PES membranes are high and stable over five continuous cycles. The water flux of the modified membrane was not significantly influenced and only decreased about 10% compared to the pristine membrane. In addition, the flux recovery ratios (FRR) of fouled membranes treated by photocatalysis were almost 100%.
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Affiliation(s)
- Hieu Trung Nguyen
- Department of Civil Engineering, Zhongli District, Chung Yuan Christian University, No. 200, Zhongbei Road, Taoyuan City, 32023, Taiwan
- Center for Environmental Risk Management, Zhongli District, Chung Yuan Christian University, No. 200, Zhongbei Road, Taoyuan City, 32023, Taiwan
| | - Ha Manh Bui
- Department of Environmental Sciences, Saigon University, 273 An Duong Vuong Street, District 5, Ho Chi Minh City, 70000, Vietnam
| | - Ya-Fen Wang
- Center for Environmental Risk Management, Zhongli District, Chung Yuan Christian University, No. 200, Zhongbei Road, Taoyuan City, 32023, Taiwan
- Department of Environmental Engineering, Zhongli District, Chung Yuan Christian University, No. 200, Zhongbei Road, Taoyuan City, 32023, Taiwan
| | - Sheng-Jie You
- Center for Environmental Risk Management, Zhongli District, Chung Yuan Christian University, No. 200, Zhongbei Road, Taoyuan City, 32023, Taiwan.
- Department of Environmental Engineering, Zhongli District, Chung Yuan Christian University, No. 200, Zhongbei Road, Taoyuan City, 32023, Taiwan.
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Hanan A, Solangi MY, Jaleel laghari A, Shah AA, Aftab U, Ibupoto ZA, Abro MI, Lakhan MN, Soomro IA, Dawi EA, Al Karim Haj Ismail A, Mustafa E, Vigolo B, Tahira A, Ibupoto ZH. PdO@CoSe 2 composites: efficient electrocatalysts for water oxidation in alkaline media. RSC Adv 2022; 13:743-755. [PMID: 36683771 PMCID: PMC9809149 DOI: 10.1039/d2ra07340d] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 12/16/2022] [Indexed: 01/04/2023] Open
Abstract
In this study, we have prepared cobalt selenide (CoSe2) due to its useful aspects from a catalysis point of view such as abundant active sites from Se edges, and significant stability in alkaline conditions. CoSe2, however, has yet to prove its functionality, so we doped palladium oxide (PdO) onto CoSe2 nanostructures using ultraviolet (UV) light, resulting in an efficient and stable water oxidation composite. The crystal arrays, morphology, and chemical composition of the surface were studied using a variety of characterization techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared (FTIR) spectroscopy. It was also demonstrated that the composite systems were heterogeneous in their morphology, undergoing a shift in their diffraction patterns, suffering from a variety of metal oxidation states and surface defects. The water oxidation was verified by a low overpotential of 260 mV at a current density of 20 mA cm-2 with a Tafel Slope value of 57 mV dec-1. The presence of multi metal oxidation states, rich surface edges of Se and favorable charge transport played a leading role towards water oxidation with a low energy demand. Furthermore, 48 h of durability is associated with the composite system. With the use of PdO and CoSe2, new, low efficiency, simple electrocatalysts for water catalysis have been developed, enabling the development of practical energy conversion and storage systems. This is an excellent alternative approach for fostering growth in the field.
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Affiliation(s)
- Abdul Hanan
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University150001HarbinPR China
| | - Muhammad Yameen Solangi
- Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology76080JamshoroPakistan
| | - Abdul Jaleel laghari
- Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology76080JamshoroPakistan
| | - Aqeel Ahmed Shah
- NED University of Engineering and Technology75270KarachiPakistan
| | - Umair Aftab
- Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology76080JamshoroPakistan
| | - Zahoor Ahmed Ibupoto
- Faculty of Agricultural Engineering and Technology, PMAS-Arid Agriculture UniversityRawalpindiPakistan
| | - Muhammad Ishaque Abro
- Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology76080JamshoroPakistan
| | - Muhammad Nazim Lakhan
- Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University150001HarbinPR China
| | - Irfan Ali Soomro
- Institute of Computational Chemistry, College of Chemistry, Beijing University of Chemical Technology100029BeijingPR China
| | - Elmuez A. Dawi
- Nonlinear Dynamics Research Centre (NDRC), Ajman UniversityP.O. Box 346United Arab Emirates
| | | | - Elfatih Mustafa
- Department of Science and Technology (ITN), Linköping University, Campus Norrköping60174 NorrköpingSweden
| | | | - Aneela Tahira
- Institute of Chemistry, Shah Abdul Latif University Khairpur MirsSindhPakistan
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24
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Sustainable organic synthesis promoted on titanium dioxide using coordinated water and renewable energies/resources. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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Moreno YP, de Escobar CC, Skovroinski E, Weibel DE, dos Santos JH. TiO2/SiO2 dopant-free nanophotocatalysts for highly efficient photocatalytic water splitting: Challenging traditional TiO2-based systems. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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26
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A Brief Review of Photocatalytic Reactors Used for Persistent Pesticides Degradation. CHEMENGINEERING 2022. [DOI: 10.3390/chemengineering6060089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Pesticide pollution is a major issue, given their intensive use in the 20th century, which led to their accumulation in the environment. At the international level, strict regulations are imposed on the use of pesticides, simultaneously with the increasing interest of researchers from all over the world to find methods of neutralizing them. Photocatalytic degradation is an intensively studied method to be applied for the degradation of pesticides, especially through the use of solar energy. The mechanisms of photocatalysis are studied and implemented in pilot and semi-pilot installations on experimental platforms, in order to be able to make this method more efficient and to identify the equipment that can achieve the photodegradation of pesticides with the highest possible yields. This paper proposes a brief review of the impact of pesticides on the environment and some techniques for their degradation, with the main emphasis on different photoreactor configurations, using slurry or immobilized photocatalysts. This review highlights the efforts of researchers to harmonize the main elements of photocatalysis: choice of the photocatalyst, and the way of photocatalyst integration within photoreaction configuration, in order to make the transfer of momentum, mass, and energy as efficient as possible for optimal excitation of the photocatalyst.
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Kubovics M, Silva CG, López-Periago AM, Faria JL, Domingo C. Photocatalytic Hydrogen Production using Porous 3D Graphene-Based Aerogels Supporting Pt/TiO 2 Nanoparticles. Gels 2022; 8:719. [PMID: 36354627 PMCID: PMC9689606 DOI: 10.3390/gels8110719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/27/2022] [Accepted: 11/02/2022] [Indexed: 10/28/2023] Open
Abstract
Composites involving reduced graphene oxide (rGO) aerogels supporting Pt/TiO2 nanoparticles were fabricated using a one-pot supercritical CO2 gelling and drying method, followed by mild reduction under a N2 atmosphere. Electron microscopy images and N2 adsorption/desorption isotherms indicate the formation of 3D monolithic aerogels with a meso/macroporous morphology. A comprehensive evaluation of the synthesized photocatalyst was carried out with a focus on the target application: the photocatalytic production of H2 from methanol in aqueous media. The reaction conditions (water/methanol ratio, catalyst concentration), together with the aerogel composition (Pt/TiO2/rGO ratio) and architecture (size of the aerogel pieces), were the factors that varied in optimizing the process. These experimental parameters influenced the diffusion of the reactants/products inside the aerogel, the permeability of the porous structure, and the light-harvesting properties, all determined in this study towards maximizing H2 production. Using methanol as the sacrificial agent, the measured H2 production rate for the optimized system (18,800 µmolH2h-1gNPs-1) was remarkably higher than the values found in the literature for similar Pt/TiO2/rGO catalysts and reaction media (2000-10,000 µmolH2h-1gNPs-1).
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Affiliation(s)
- Márta Kubovics
- Instituto de Ciencia de Materiales de Barcelona, CSIC, Campus UAB s/n, 8193 Bellaterra, Spain
| | - Cláudia G. Silva
- LSRE-LCM-Laboratory of Separation and Reaction Engineering–Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Ana M. López-Periago
- Instituto de Ciencia de Materiales de Barcelona, CSIC, Campus UAB s/n, 8193 Bellaterra, Spain
| | - Joaquim L. Faria
- LSRE-LCM-Laboratory of Separation and Reaction Engineering–Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE-Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Concepción Domingo
- Instituto de Ciencia de Materiales de Barcelona, CSIC, Campus UAB s/n, 8193 Bellaterra, Spain
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Lutic D, Sescu AM, Siamer S, Harja M, Favier L. Excellent ambient oxidation and mineralization of an emerging water pollutant using Pd-doped TiO 2 photocatalyst and UV-A irradiation. CR CHIM 2022. [DOI: 10.5802/crchim.145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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On the Morphology of Nanostructured TiO2 for Energy Applications: The Shape of the Ubiquitous Nanomaterial. NANOMATERIALS 2022; 12:nano12152608. [PMID: 35957039 PMCID: PMC9370519 DOI: 10.3390/nano12152608] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 01/25/2023]
Abstract
Nanostructured titania is one of the most commonly encountered constituents of nanotechnology devices for use in energy-related applications, due to its intrinsic functional properties as a semiconductor and to other favorable characteristics such as ease of production, low toxicity and chemical stability, among others. Notwithstanding this diffusion, the quest for improved understanding of the physical and chemical mechanisms governing the material properties and thus its performance in devices is still active, as testified by the large number of dedicated papers that continue to be published. In this framework, we consider and analyze here the effects of the material morphology and structure in determining the energy transport phenomena as cross-cutting properties in some of the most important nanophase titania applications in the energy field, namely photovoltaic conversion, hydrogen generation by photoelectrochemical water splitting and thermal management by nanofluids. For these applications, charge transport, light transport (or propagation) and thermal transport are limiting factors for the attainable performances, whose dependence on the material structural properties is reviewed here on its own. This work aims to fill the gap existing among the many studies dealing with the separate applications in the hope of stimulating novel cross-fertilization approaches in this research field.
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Yang JJ, Zhang Y, Xie XY, Fang WH, Cui G. Photocatalytic Reduction of Carbon Dioxide to Methane at the Pd-Supported TiO 2 Interface: Mechanistic Insights from Theoretical Studies. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jia-Jia Yang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yang Zhang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Xiao-Ying Xie
- The Laboratory of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Wei-Hai Fang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Ganglong Cui
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
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31
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Moustafa HM, Mahmoud MS, Nassar MM. Photon-induced water splitting experimental and kinetic studies with a hydrothermally prepared TiO2-doped rGO photocatalyst. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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32
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Chowdhury AP, Anantharaju KS, Umare SS, Dhar SS. Facile fabrication of binary BiOCl-Cu2CoSnS4 and ternary BiOCl-Cu2CoSnS4-TiO2 heterojunction nano photocatalyst for efficient sunlight-driven removal of direct blue 71 in an aqueous medium. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
The indiscriminate use of naproxen as an anti-inflammatory has been the leading cause of pollution in sewage effluents. Conversely, titanium dioxide is one of the most promising photocatalyst for the degradation of pollutants. Ti-La mixed oxides containing 0, 1, 3, 5, and 10 wt.% of lanthanum were synthetized by sol-gel and tested as photocatalysts in the degradation of naproxen (NPX). The materials were further characterized by X-ray diffraction (XRD), nitrogen physisorption (BET), scanning electron microscopy (SEM), UV-Vis and Fourier-transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The XRD patterns resembled that of anatase titania. The Eg values, determined from the UV-Vis spectra, vary from 2.07 to 3.2 eV corresponded to pure titania. The photocatalytic activity of these materials showed a degradation of naproxen from 93.6 to 99.8 wt.% after 4 h under UV irradiation.
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Lyu S, Younis MA, Liu Z, Zeng L, Peng X, Yang B, Li Z, Lei L, Hou Y. Rational design on photoelectrodes and devices to boost photoelectrochemical performance of solar-driven water splitting: a mini review. Front Chem Sci Eng 2022. [DOI: 10.1007/s11705-022-2148-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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35
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Systematic Study of Effective Hydrothermal Synthesis to Fabricate Nb-Incorporated TiO 2 for Oxygen Reduction Reaction. MATERIALS 2022; 15:ma15051633. [PMID: 35268863 PMCID: PMC8911348 DOI: 10.3390/ma15051633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/16/2022] [Accepted: 02/20/2022] [Indexed: 11/17/2022]
Abstract
Fuel cells are expected to serve as next-generation energy conversion devices owing to their high energy density, high power, and long life performance. The oxygen reduction reaction (ORR) is important for determining the performance of fuel cells; therefore, using catalysts to promote the ORR is essential for realizing the practical applications of fuel cells. Herein, we propose Nb-incorporated TiO2 as a suitable alternative to conventional Pt-based catalysts, because Nb doping has been reported to improve the conductivity and electron transfer number of TiO2. In addition, Nb-incorporated TiO2 can induce the electrocatalytic activity for the ORR. In this paper, we report the synthesis method for Nb-incorporated TiO2 through a hydrothermal process with and without additional load pressures. The electrocatalytic activity of the synthesized samples for the ORR was also demonstrated. In this process, the samples obtained under various load pressures exceeding the saturated vapor pressure featured a high content of Nb and crystalline TiNb2O7, resulting in an ellipsoidal morphology. X-ray diffraction results also revealed that, on increasing the Nb doping amounts, the diffraction peak of the anatase TiO2 shifted to a lower angle and the full width at half maximum decreased. This implies that the Ti atom is exchanged with the Nb atom during this process, resulting in a decrease in TiO2 crystallinity. At a doping level of 10%, Nb-incorporated TiO2 exhibited the best electrocatalytic activity in terms of the oxygen reduction current (iORR) and onset potential for the ORR (EORR); this suggests that 10% Nb-doped samples have the potential for enhancing electrocatalytic activity.
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36
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Peerakiatkhajohn P, Yun JH, Butburee T, Nisspa W, Thaweesak S. Surface plasmon-driven photoelectrochemical water splitting of a Ag/TiO 2 nanoplate photoanode. RSC Adv 2022; 12:2652-2661. [PMID: 35425299 PMCID: PMC8979192 DOI: 10.1039/d1ra09070d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 01/05/2022] [Indexed: 01/09/2023] Open
Abstract
A silver/titanium dioxide nanoplate (Ag/TiO2 NP) photoelectrode was designed and fabricated from vertically aligned TiO2 nanoplates (NP) decorated with silver nanoparticles (NPs) through a simple hydrothermal synthesis and electrodeposition route. The electrodeposition times of Ag NPs on the TiO2 NP were crucial for surface plasmon-driven photoelectrochemical (PEC) water splitting performance. The Ag/TiO2 NP at the optimal deposition time of 5 min with a Ag element content of 0.53 wt% demonstrated a remarkably high photocurrent density of 0.35 mA cm−2 at 1.23 V vs. RHE under AM 1.5G illumination, which was 5 fold higher than that of the pristine TiO2 NP. It was clear that the enhanced light absorption properties and PEC performance for Ag/TiO2 NP could be effectively adjusted by simply controlling the loading amounts of metallic Ag NPs (average size of 10–30 nm) at different electrodeposition times. The superior PEC performance of the Ag/TiO2 NP photoanode was attributed to the synergistic effects of the plasmonic Ag NPs and the TiO2 nanoplate. Interestingly, the plasmonic effect of Ag NPs not only increased the visible-light response (λmax = 570 nm) of TiO2 but also provided hot electrons to promote photocurrent generation and suppress charge recombination. Importantly, this study offers a potentially efficient strategy for the design and fabrication of a new type of TiO2 hybrid nanostructure with a plasmonic enhancement for PEC water splitting. A hybrid nanostructure Ag/TiO2 photoelectrode for PEC water splitting with a remarkable high photocurrent density, 0.35 mA cm−2 (5 fold higher than that of the pristine TiO2 photoeletrode) was fabricated by a facile one-pot hydrothermal and electrodeposition method.![]()
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Affiliation(s)
| | - Jung-Ho Yun
- Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland St Lucia QLD 4123 Australia
| | - Teera Butburee
- National Nanotechnology Center, National Science and Technology Development Agency 111 Thailand Science Park Pathum Thani 12120 Thailand
| | - Waraporn Nisspa
- Division of Science and Technology, Faculty of Science and Technology, Phetchaburi Rajabhat University Phetchaburi 76000 Thailand
| | - Supphasin Thaweesak
- Department of Chemical Engineering, Faculty of Engineering, Burapha University Chon Buri 20131 Thailand
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37
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Parangi T. A Review on Electrochemical and Photochemical Processes for Hydrogen Production. COMMENT INORG CHEM 2022. [DOI: 10.1080/02603594.2021.2013827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Tarun Parangi
- Applied Chemistry Department, Faculty of Technology & Engineering, the M. S. University of Baroda, Vadodara, India
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38
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Alnaggar G, Alkanad K, G. C. SS, Bajiri MA, Drmosh QAQ, Krishnappagowda LN, Ananda S. Rational design of 2D TiO2-MoO3 Step-scheme heterostructure for boosted photocatalytic overall water splitting. NEW J CHEM 2022. [DOI: 10.1039/d2nj00173j] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Designing of step-scheme (S-scheme) heterostructure photocatalyst is a promising strategy for the high utilization of photogenerated charge carriers. Herein, a novel S-scheme two-dimensional (2D) TiO2-MoO3 heterojunction photocatalyst is fabricated by...
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39
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Solangi MY, Aftab U, Tahira A, Abro MI, Mazarro R, Morandi V, Nafady A, Medany SS, Infantes-Molina A, Ibupoto ZH. An efficient palladium oxide nanoparticles@Co3O4 nanocomposite with low chemisorbed species for enhanced oxygen evolution reaction. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 2022; 47:3834-3845. [DOI: 10.1016/j.ijhydene.2021.11.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
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40
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Kim T, Park H, Park BH, Joon Yoon S, Liu C, Joo SW, Son N, Kang M. Long-term catalytic durability in Z-scheme CdS@ 1T-WS2 heterojunction materials. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2021.09.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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41
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Investigation of TiO2 Nanoparticles Synthesized by Sol-Gel Method for Effectual Photodegradation, Oxidation and Reduction Reaction. CRYSTALS 2021. [DOI: 10.3390/cryst11121456] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Metal oxide titanium dioxide (TiO2) nanoparticles were synthesized by using a simple and economical sol-gel method. The prepared nanoparticles were used to evaluate methylene blue dye degradation and as catalysts in the oxidation of benzaldehyde. The crystallite size of the titanium dioxide nanoparticle was 18.3 nm, which was confirmed by X-ray diffraction analysis. The spherical morphology was confirmed by scanning electron microscopy (SEM), and the elemental composition of the nanoparticle was found by energy dispersive X-ray (EDAX) analysis. The anatase form of the nanoparticle was confirmed by the bandgap 3.2 eV, which was measured using UV–DRS analysis. The bond between metal and oxygen was confirmed by the peaks at 485 and 606 cm–1 analyzed by Fourier transform infrared analysis (FTIR). The efficiency of the catalyst in dye degradation was 60.08, 68.38, and 80.89% with respect to 50, 75, and 100 mg catalyst weight. The yield % of benzoic acid was 94%, and the reduction efficiency against 4-nitrophenol was 98.44%.
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Boytsova OV, Drozhzhin OA, Petukhov DI, Chumakova AV, Sobol AG, Beltyukov AN, Eliseev AA, Bosak AB. One-step synthesis of vanadium-doped anatase mesocrystals for Li-ion battery anodes. NANOTECHNOLOGY 2021; 33:055603. [PMID: 34670202 DOI: 10.1088/1361-6528/ac317a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
Here we report a successful one-step synthesis of vanadium-doped anatase mesocrystals by reactive annealing of NH4TiOF3/PEG2000 mesocrystal precursors with NH4VO3. The formation solid solution Ti1-xVxO2with vanadium content up tox = 25 at% inheriting the structure of mesocrystals is observed for the first time. The doping mechanism via vapor phase transport of vanadium is proposed. The Ti1-xVxO2mesocrystals exhibit improved specific capacity of 175 mAh g-1(compared to 150 mAh g-1for pure anatase phase) and decreased potential gap between charge and discharge processes.
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Affiliation(s)
- O V Boytsova
- Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskie Gory, Moscow, 119991, Russia
- Kurnakov Institute of General and Inorganic Chemistry RAS, Leninskii Prosp. 31, Moscow, 119071, Russia
| | - O A Drozhzhin
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, Moscow, 119991, Russia
| | - D I Petukhov
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, Moscow, 119991, Russia
| | - A V Chumakova
- European Synchrotron Radiation Facility, 78 Avenue des Martyrs, 38000 Grenoble, France
| | - A G Sobol
- Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskie Gory, Moscow, 119991, Russia
| | - A N Beltyukov
- Udmurt Federal Research Center of the Ural Brunch of Russian Academy of Sciences (UdmFRCof UB RAS), Izhevsk, st.them. Tatiana Baramzina 34, 426067, Russia
| | - A A Eliseev
- Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskie Gory, Moscow, 119991, Russia
| | - A B Bosak
- European Synchrotron Radiation Facility, 78 Avenue des Martyrs, 38000 Grenoble, France
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Seiß V, Helbig U, Lösel R, Eichelbaum M. Investigating and correlating photoelectrochemical, photocatalytic, and antimicrobial properties of [Formula: see text] nanolayers. Sci Rep 2021; 11:22200. [PMID: 34772987 PMCID: PMC8589999 DOI: 10.1038/s41598-021-01165-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 10/22/2021] [Indexed: 11/23/2022] Open
Abstract
Semiconducting transition metal oxides such as [Formula: see text] are promising photo(electro)catalysts for solar water splitting and photoreduction of [Formula: see text] as well as for antibacterial, self-, water and air-cleaning coatings and admixtures in paints, building materials, on window glass or medical devices. In photoelectrocatalytic applications [Formula: see text] is usually used as photoanode only catalyzing the oxidation reaction. In coatings and admixtures [Formula: see text] works as heterogeneous catalyst and has to catalyze a complete redox cycle. While photoelectrochemical charge transport parameters are usually quite well accessible by electrochemical measurements, the quantitative description of photocatalytic properties is more challenging. Here, we present a systematic structural, photoelectrocatalytic, photocatalytic and antimicrobial study to understand if and how photoelectrochemical parameters can be used to predict the photocatalytic activity of [Formula: see text]. For this purpose [Formula: see text] thin films on flourine-doped tin oxide substrates were prepared and annealed at temperatures between 200 and 600 [Formula: see text]. The film morphologies and thicknesses were studied by GIXRD, FESEM, and EDX. Photoelectrochemical properties were measured by linear sweep voltammetry, photoelectrochemical impedance spectroscopy, chopped light chronoamperometry, and intensity modulated photocurrent/ photovoltage spectroscopy. For comparison, photocatalytic rate constants were determined by methylene blue degradation and Escherichea coli inactivation and correlated with the deduced photoelectrocatalytic parameters. We found that the respective photoactivities of amorphous and crystalline [Formula: see text] nanolayers can be best correlated, if the extracted photoelectrochemical parameters such as charge transfer and recombination rates, charge transfer efficiencies and resistances are measured close to the open circuit potential (OCP). Hence, the interfacial charge transport parameters at the OCP can be indeed used as descriptors for predicting and understanding the photocatalytic activity of [Formula: see text] coatings.
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Affiliation(s)
- Volker Seiß
- Faculty of Applied Chemistry, Georg Simon Ohm University of Applied Sciences Nuremberg, 90489 Nuremberg, Germany
| | - Uta Helbig
- Faculty of Materials Engineering, Georg Simon Ohm University of Applied Sciences Nuremberg, 90489 Nuremberg, Germany
| | - Ralf Lösel
- Faculty of Applied Chemistry, Georg Simon Ohm University of Applied Sciences Nuremberg, 90489 Nuremberg, Germany
| | - Maik Eichelbaum
- Faculty of Applied Chemistry, Georg Simon Ohm University of Applied Sciences Nuremberg, 90489 Nuremberg, Germany
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Khalyavka TA, Shapovalova MV, Korzhak GV, Shcherban ND, Khyzhun OY, Camyshan SV, Permyakov VV, Scherbakov SN. Photocatalytic hydrogen evolution and Rifampicinum destruction over carbon-modified TiO2. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-021-04609-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Application of Spinel and Hexagonal Ferrites in Heterogeneous Photocatalysis. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112110160] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Semiconducting materials display unique features that enable their use in a variety of applications, including self-cleaning surfaces, water purification systems, hydrogen generation, solar energy conversion, etc. However, one of the major issues is separation of the used materials from the process suspension. Therefore, chemical compounds with magnetic properties have been proposed as crucial components of photocatalytic composites, facilitating separation and recovery of photocatalysts under magnetic field conditions. This review paper presents the current state of knowledge on the application of spinel and hexagonal ferrites in heterogeneous photocatalysis. The first part focuses on the characterization of magnetic (nano)particles. The next section presents the literature findings on the single-phase magnetic photocatalyst. Finally, the current state of scientific knowledge on the wide variety of magnetic-photocatalytic composites is presented. A key aim of this review is to indicate that spinel and hexagonal ferrites are considered as an important element of heterogeneous photocatalytic systems and are responsible for the effective recycling of the photocatalytic materials.
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Bad'ura Z, Naldoni A, Qin S, Bakandritsos A, Kment Š, Schmuki P, Zoppellaro G. Light-Induced Migration of Spin Defects in TiO 2 Nanosystems and their Contribution to the H 2 Evolution Catalysis from Water. CHEMSUSCHEM 2021; 14:4408-4414. [PMID: 34384004 DOI: 10.1002/cssc.202101218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 08/12/2021] [Indexed: 06/13/2023]
Abstract
The photocatalytic activity for H2 production from water, without presence of hole scavengers, of thermally reduced TiO2 nanoparticles (H-500, H-700) and neat anatase were followed by in-situ continuous-wave light-induced electron paramagnetic resonance technique (CW-LEPR), in order to correlate the H2 evolution rates with the electronic fingerprints of the photoexcited systems. Under UV irradiation, photoexcited electrons moved from the deep lattice towards the superficially exposed Ti sites. These photogenerated redox sites mediated (e- +h+ ) recombination and were the crucial electronic factor affecting catalysis. In the best-performant system (H-500), a synergic combination of mobile electrons was observed, which dynamically created diverse types of Ti3+ sites, including interstitial Ti3+ , and singly ionized electrons trapped in oxygen vacancies (VO . ). The interplay of these species fed successfully surface exposed Ti4+ sites, which became a catalytically active, fast reacting Ti4+ ⇄Ti3+ state that was key for the H2 evolution process.
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Affiliation(s)
- Zdeněk Bad'ura
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University, Slechtitelů 27, 78371, Olomouc, Czech Republic
- Department of Experimental Physics, Faculty of Science, Palacký University, 17. listopadu 1192/12, Olomouc, 779 00, Czech Republic
| | - Alberto Naldoni
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University, Slechtitelů 27, 78371, Olomouc, Czech Republic
| | - Shanshan Qin
- Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
| | - Aristides Bakandritsos
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University, Slechtitelů 27, 78371, Olomouc, Czech Republic
| | - Štěpán Kment
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University, Slechtitelů 27, 78371, Olomouc, Czech Republic
- CEET, Nanotechnology Centre, Centre of Energy and Environmental Technologies, VŠB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00, Ostrava-Poruba, Czech Republic
| | - Patrik Schmuki
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University, Slechtitelů 27, 78371, Olomouc, Czech Republic
- Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
| | - Giorgio Zoppellaro
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University, Slechtitelů 27, 78371, Olomouc, Czech Republic
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Balsamo SA, Fiorenza R, Condorelli M, Pecoraro R, Brundo MV, Lo Presti F, Sciré S. One-Pot Synthesis of TiO 2-rGO Photocatalysts for the Degradation of Groundwater Pollutants. MATERIALS 2021; 14:ma14205938. [PMID: 34683530 PMCID: PMC8539955 DOI: 10.3390/ma14205938] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/05/2021] [Accepted: 10/07/2021] [Indexed: 11/16/2022]
Abstract
A non-conventional approach to prepare titanium dioxide-reduced graphene oxide (TiO2-rGO) nanocomposites based on solar photoreduction is here presented. The standard hydro-solvothermal synthesis of the TiO2-rGO composites requires high temperatures and several steps, whereas the proposed one-pot preparation allows one to obtain the photocatalysts with a simple and green procedure, by exploiting the photocatalytic properties of titania activated by the solar irradiation. The TiO2-rGO catalysts were tested in the solar photodegradation of a widely adopted toxic herbicide (2,4-Dichlorophenoxyacetic acid, 2,4-D), obtaining the 97% of degradation after 3 h of irradiation. The as-prepared TiO2-rGO composites were more active compared to the same photocatalysts prepared through the conventional thermal route. The structural, optical, and textural properties of the composites, determined by Raman, Photoluminescence, Fourier Transform InfraRed (FTIR), UV-vis diffuse reflectance (DRS) spectroscopies, and N2 absorption-desorption measurements, showed as the solar irradiation favors the reduction of graphene oxide with higher efficiency compared to the thermal-driven synthesis. Furthermore, the possible toxicity of the as-synthesized composites was measured exposing nauplii of microcrustacean Artemia sp. to solutions containing TiO2-rGO. The good results in the 2,4-D degradation process and the easiness of the TiO2-rGO synthesis allow to consider the proposed approach a promising strategy to obtain performing photocatalysts.
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Affiliation(s)
- Stefano Andrea Balsamo
- Department of Chemical Sciences, University of Catania, Viale A. Doria 6, 95125 Catania, Italy; (S.A.B.); (M.C.); (F.L.P.); (S.S.)
| | - Roberto Fiorenza
- Department of Chemical Sciences, University of Catania, Viale A. Doria 6, 95125 Catania, Italy; (S.A.B.); (M.C.); (F.L.P.); (S.S.)
- Correspondence: ; Tel.: +39-095-738-5012
| | - Marcello Condorelli
- Department of Chemical Sciences, University of Catania, Viale A. Doria 6, 95125 Catania, Italy; (S.A.B.); (M.C.); (F.L.P.); (S.S.)
| | - Roberta Pecoraro
- Department of Biological, Geological and Environmental Science, University of Catania, Via Androne 81, 95124 Catania, Italy; (R.P.); (M.V.B.)
| | - Maria Violetta Brundo
- Department of Biological, Geological and Environmental Science, University of Catania, Via Androne 81, 95124 Catania, Italy; (R.P.); (M.V.B.)
| | - Francesca Lo Presti
- Department of Chemical Sciences, University of Catania, Viale A. Doria 6, 95125 Catania, Italy; (S.A.B.); (M.C.); (F.L.P.); (S.S.)
| | - Salvatore Sciré
- Department of Chemical Sciences, University of Catania, Viale A. Doria 6, 95125 Catania, Italy; (S.A.B.); (M.C.); (F.L.P.); (S.S.)
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Kot A, Radecka M, Dorosz D, Zakrzewska K. Optically Active TiO 2:Er Thin Films Deposited by Magnetron Sputtering. MATERIALS 2021; 14:ma14154085. [PMID: 34361277 PMCID: PMC8348420 DOI: 10.3390/ma14154085] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/10/2021] [Accepted: 07/14/2021] [Indexed: 11/25/2022]
Abstract
Titanium dioxide photoanodes for hydrogen generation suffer from a profound mismatch between the optical absorption of TiO2 and the solar spectrum. To solve the problem of low solar-to-chemical efficiency, optically active materials are proposed. In this work, TiO2 thin films containing erbium were deposited by radio frequency RF magnetron sputtering under ultrahigh vacuum conditions UHV. Morphology, structural, optical and electronic properties were studied. TiO2:Er thin films are homogenous, with uniform distribution of Er ions and high transparency over the visible VIS range of the light spectrum. However, a profound 0.4 eV blue shift of the fundamental absorption edge with respect to undoped TiO2 was observed, which can be attributed either to the size effect due to amorphization of TiO2 host or to the onset of precipitation of Er2Ti2O7 nanocrystals. Near-infrared NIR to VIS up-conversion is demonstrated upon excitation at 980 nm, while strong green photoluminescence at 525 and 550 nm occurs upon photon absorption at 488 nm.
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Affiliation(s)
- Anna Kot
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Kraków, Poland; (M.R.); (D.D.)
- Correspondence:
| | - Marta Radecka
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Kraków, Poland; (M.R.); (D.D.)
| | - Dominik Dorosz
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Kraków, Poland; (M.R.); (D.D.)
| | - Katarzyna Zakrzewska
- Faculty of Computer Science, Electronics and Telecommunications, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Kraków, Poland;
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SnS2/TiO2 Nanocomposites for Hydrogen Production and Photodegradation under Extended Solar Irradiation. Catalysts 2021. [DOI: 10.3390/catal11050589] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Earth–abundant transition metal chalcogenide materials are of great research interest for energy production and environmental remediation, as they exhibit better photocatalytic activity due to their suitable electronic and optical properties. This study focuses on the photocatalytic activity of flower-like SnS2 nanoparticles (composed of nanosheet subunits) embedded in TiO2 synthesized by a facile hydrothermal method. The materials were characterized using different techniques, and their photocatalytic activity was assessed for hydrogen evolution reaction and the degradation of methylene blue. Among the catalysts studied, 10 wt. % of SnS2 loaded TiO2 nanocomposite shows an optimum hydrogen evolution rate of 195.55 µmolg−1, whereas 15 wt. % loading of SnS2 on TiO2 exhibits better performance against the degradation of methylene blue (MB) with the rate constant of 4.415 × 10−4 s−1 under solar simulated irradiation. The improved performance of these materials can be attributed to the effective photo-induced charge transfer and reduced recombination, which make these nanocomposite materials promising candidates for the development of high-performance next-generation photocatalyst materials. Further, scavenging experiments were carried out to confirm the reactive oxygen species (ROS) involved in the photocatalytic degradation. It can be observed that there was a 78% reduction in the rate of degradation when IPA was used as the scavenger, whereas around 95% reduction was attained while N2 was used as the scavenger. Notably, very low degradation (<5%) was attained when the dye alone was directly under solar irradiation. These results further validate that the •OH radical and the superoxide radicals can be acknowledged for the degradation mechanism of MB, and the enhancement of degradation efficiency may be due to the combined effect of in situ dye sensitization during the catalysis and the impregnation of low bandgap materials on TiO2.
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Facile Synthesis of Potassium-Doped Titanium Oxide Nanostructure (KTiOxs)/AlO(OH) Composites for Enhanced Photocatalytic Performance. Catalysts 2021. [DOI: 10.3390/catal11050548] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Generally, nanoparticles (NPs) are used as photocatalysts, which sometimes results in difficulties in the separation and recycling of photocatalysts from suspensions after their application in water and wastewater treatment, which hinders industrial applications of NPs that are too fine to be removed by gravitational settling. This can be solved by using support NPs to overcome these problems. -OH enrich AlO(OH), which is produced by a steam coating process, has been could be used as a possible support, because the -OH groups on the surface can interact with foreign molecules; thus, various composite functional materials can be prepared. Potassium doped titanium oxide NPs, which are produced by a wet corrosion process, namely KTiOxs, have been selected as photocatalysts, because KTiOxs have sufficient K+ ions, thereby expecting the chemical bonding with -OH group from AlO(OH). This study fabricated a novel photocataysis system made by combining KTiOxs as catalysts and AlO(OH) as the catalysts’ support, namely KTiOxs/AlO(OH) composites. The KTiOxs nanowires, obtained from 10 mol/L of a KOH solution treated with Ti and AlO(OH) at 280 °C for 24 h through a steam coating process, yielded the highest surface area and the highest photocatalytic performance.
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