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Tjardts T, Elis M, Shondo J, Voß L, Schürmann U, Faupel F, Kienle L, Veziroglu S, Aktas OC. Self-Modification of Defective TiO 2 under Controlled H 2/Ar Gas Environment and Dynamics of Photoinduced Surface Oxygen Vacancies. CHEMSUSCHEM 2024:e202400046. [PMID: 38739088 DOI: 10.1002/cssc.202400046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 04/18/2024] [Accepted: 05/10/2024] [Indexed: 05/14/2024]
Abstract
In recent years, defective TiO2 has caught considerable research attention because of its potential to overcome the limits of low visible light absorption and fast charge recombination present in pristine TiO2 photocatalysts. Among the different synthesis conditions for defective TiO2, ambient pressure hydrogenation with the addition of Ar as inert gas for safety purposes has been established as an easy method to realize the process. Whether the Ar gas might still influence the resulting photocatalytic properties and defective surface layer remains an open question. Here, we reveal that the gas flow ratio between H2 and Ar has a crucial impact on the defective structure as well as the photocatalyic activity of TiO2. In particular, transmission electron microscopy (TEM) in combination with electron energy loss spectroscopy (EELS) revealed a larger width of the defective surface layer when using a H2/Ar (50 %-50 %) gas mixture over pure H2. A possible reason could be the increase in dynamic viscosity of the gas mixture when Ar is added. Additionally, photoinduced enhanced Raman spectroscopy (PIERS) is implemented as a complementary approach to investigate the dynamics of the defective structures under ambient conditions which cannot be effortlessly realized by vacuum techniques like TEM.
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Affiliation(s)
- Tim Tjardts
- Chair for Multicomponent Materials, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany (Dr. Salih Veziroglu) (Prof. Dr.-Ing. Oral Cenk Aktas
| | - Marie Elis
- Synthesis and Real Structure, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany
| | - Josiah Shondo
- Chair for Multicomponent Materials, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany (Dr. Salih Veziroglu) (Prof. Dr.-Ing. Oral Cenk Aktas
| | - Lennart Voß
- Synthesis and Real Structure, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany
| | - Ulrich Schürmann
- Synthesis and Real Structure, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany
- Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, Christian Albrechts-Platz 4, 24118, Kiel, Germany
| | - Franz Faupel
- Chair for Multicomponent Materials, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany (Dr. Salih Veziroglu) (Prof. Dr.-Ing. Oral Cenk Aktas
- Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, Christian Albrechts-Platz 4, 24118, Kiel, Germany
| | - Lorenz Kienle
- Synthesis and Real Structure, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany
- Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, Christian Albrechts-Platz 4, 24118, Kiel, Germany
| | - Salih Veziroglu
- Chair for Multicomponent Materials, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany (Dr. Salih Veziroglu) (Prof. Dr.-Ing. Oral Cenk Aktas
- Kiel Nano, Surface and Interface Science KiNSIS, Kiel University, Christian Albrechts-Platz 4, 24118, Kiel, Germany
| | - Oral Cenk Aktas
- Chair for Multicomponent Materials, Department of Materials Science, Kiel University, Faculty of Engineering, Kaiserstraße 2, 24143, Kiel, Germany (Dr. Salih Veziroglu) (Prof. Dr.-Ing. Oral Cenk Aktas
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2
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Berends D, Schwager P, Gehrke K, Vehse M, Agert C. Analysis of the Inhomogeneous Growth of Sputtered Black TiO 2 Thin Films. ACS OMEGA 2024; 9:15251-15258. [PMID: 38585060 PMCID: PMC10993395 DOI: 10.1021/acsomega.3c09772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 02/28/2024] [Accepted: 03/06/2024] [Indexed: 04/09/2024]
Abstract
Black titanium dioxide (B-TiO2) is a highly active photoelectrochemical material compared to pure titanium dioxide due to its increased light absorption properties. Recently, we presented the deposition of thin-film B-TiO2 using an asymmetric bipolar reactive magnetron sputter process. The resulting samples exhibit excellent photoelectrochemical properties, which can be fine-tuned by varying the process parameters. In this article, results of morphological, electrical, and photoelectrochemical measurements are discussed to better understand the surprisingly high electrochemical activity of the films. In order to study the influence of the dynamic process on film formation, we use static sputtering with a fixed substrate covering the entire chamber area in front of the two targets. This allows the material composition of the sputtered film to be analyzed depending on its relative position to the targets. The results lead to the conclusion that the asymmetric bipolar sputtering mainly produces two phases, a transparent, nonconductive crystalline phase and a black, conductive amorphous phase. As a consequence, the dynamically sputtered samples are multilayers of these two materials. We discuss that the significantly better electrical and photoelectrochemical properties emerge from the inhomogeneous nature of the laminates, like also found in core-shell nanoparticles of B-TiO2.
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Affiliation(s)
- Dennis Berends
- DLR Institute of Networked
Energy Systems, Urban and Residential Technologies, 26129 Oldenburg, Germany
| | - Patrick Schwager
- DLR Institute of Networked
Energy Systems, Urban and Residential Technologies, 26129 Oldenburg, Germany
| | - Kai Gehrke
- DLR Institute of Networked
Energy Systems, Urban and Residential Technologies, 26129 Oldenburg, Germany
| | - Martin Vehse
- DLR Institute of Networked
Energy Systems, Urban and Residential Technologies, 26129 Oldenburg, Germany
| | - Carsten Agert
- DLR Institute of Networked
Energy Systems, Urban and Residential Technologies, 26129 Oldenburg, Germany
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3
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Chen S, Hu YH. Color TiO 2 Materials as Emerging Catalysts for Visible-NIR Light Photocatalysis, A Review. CATALYSIS REVIEWS 2023. [DOI: 10.1080/01614940.2023.2169451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Shaoqin Chen
- Department of Materials Science and Engineering, Michigan Technological University, Houghton, Michigan, USA
| | - Yun Hang Hu
- Department of Materials Science and Engineering, Michigan Technological University, Houghton, Michigan, USA
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Yao D, Hu Z, Zheng R, Li J, Wang L, Yang X, Lü W, Xu H. Black TiO 2-Based Dual Photoanodes Boost the Efficiency of Quantum Dot-Sensitized Solar Cells to 11.7. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:4294. [PMID: 36500917 PMCID: PMC9741270 DOI: 10.3390/nano12234294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/28/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
Quantum dot-sensitized solar cells (QDSSC) have been regarded as one of the most promising candidates for effective utilization of solar energy, but its power conversion efficiency (PCE) is still far from meeting expectations. One of the most important bottlenecks is the limited collection efficiency of photogenerated electrons in the photoanodes. Herein, we design QDSSCs with a dual-photoanode architecture, and assemble the dual photoanodes with black TiO2 nanoparticles (NPs), which were processed by a femtosecond laser in the filamentation regime, and common CdS/CdSe QD sensitizers. A maximum PCE of 11.7% with a short circuit current density of 50.3 mA/cm2 is unambiguously achieved. We reveal both experimentally and theoretically that the enhanced PCE is mainly attributed to the improved light harvesting of black TiO2 due to the black TiO2 shells formed on white TiO2 NPs.
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Affiliation(s)
- Danwen Yao
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
| | - Zhenyu Hu
- State Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012, China
| | - Ruifeng Zheng
- State Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012, China
| | - Jialun Li
- State Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012, China
| | - Liying Wang
- State Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012, China
| | - Xijia Yang
- State Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012, China
| | - Wei Lü
- State Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012, China
| | - Huailiang Xu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
- State Key Laboratory of Precision Spectroscopy and Chongqing Institute, East China Normal University, Shanghai 200062, China
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5
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Pinto TT, Núñez-de la Rosa Y, Hammer P, Aquino JM. On the performance of self-organized TiO2 nanotubes@MnOx as supercapacitor: Influence of the heat treatment, cathodic treatment, water aging, and thermal oxides. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.139898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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6
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Wang K, Zhao K, Qin X, Chen S, Yu H, Quan X. Treatment of organic wastewater by a synergic electrocatalysis process with Ti 3+ self-doped TiO 2 nanotube arrays electrode as both cathode and anode. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127747. [PMID: 34823953 DOI: 10.1016/j.jhazmat.2021.127747] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 10/27/2021] [Accepted: 11/08/2021] [Indexed: 06/13/2023]
Abstract
Electrochemical anodic oxidation (AO) is a promising technology for wastewater treatment due to its strong oxidation property and environmental compatibility. However, it suffers from high energy consumption for pollutants removal due to the side-reactions of hydrogen evolution reaction on cathode and oxygen evolution reaction on anode. Combining electro-Fenton (EF) with AO not only generated •OH for pollutants degradation but also increased current efficiency. This work investigated a synergic electrocatalysis process between EF and AO with Ti3+ self-doped TiO2 nanotube arrays (Ti3+/TNTAs) electrode as both cathode and anode for wastewater treatment. The pseudo-first-order kinetic rate constant of phenol degradation by EF+AO (0.107 min-1) was 9.7 or 6.3 times as much as that of only EF (0.011 min-1) or AO (0.017 min-1) process, respectively. Enhanced pollutants removal of EF+AO could be attributed to the coexistence of •OH oxidation and direct oxidation on Ti3+/TNTAs surface. The COD of secondary effluent of coking wastewater decreased from 159.3 mg L-1 to 47.0 mg L-1 by EF+AO within 120 min with low specific energy consumption (9.5 kWh kg-1 COD-1). This work provided a new insight into design of the energy-efficient synergic electrocatalysis process for refractory pollutants degradation.
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Affiliation(s)
- Kaixuan Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Kun Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Xin Qin
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Shuo Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Hongtao Yu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Xie Quan
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China.
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7
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Touni A, Liu X, Kang X, Carvalho PA, Diplas S, Both KG, Sotiropoulos S, Chatzitakis A. Galvanic Deposition of Pt Nanoparticles on Black TiO 2 Nanotubes for Hydrogen Evolving Cathodes. CHEMSUSCHEM 2021; 14:4993-5003. [PMID: 34478230 PMCID: PMC9291612 DOI: 10.1002/cssc.202101559] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/23/2021] [Indexed: 05/06/2023]
Abstract
A galvanic deposition method for the in-situ formation of Pt nanoparticles (NPs) on top and inner surfaces of high-aspect-ratio black TiO2 -nanotube electrodes (bTNTs) for true utilization of their total surface area has been developed. Density functional theory calculations indicated that the deposition of Pt NPs was favored on bTNTs with a preferred [004] orientation and a deposition mechanism occurring via oxygen vacancies, where electrons were localized. High-resolution transmission electron microscopy images revealed a graded deposition of Pt NPs with an average diameter of around 2.5 nm along the complete nanotube axis (length/pore diameter of 130 : 1). Hydrogen evolution reaction (HER) studies in acidic electrolytes showed comparable results to bulk Pt (per geometric area) and Pt/C commercial catalysts (per mg of Pt). The presented novel HER cathodes of minimal engineering and low noble metal loadings (μg cm-2 range) achieved low Tafel slopes (30-34 mV dec-1 ) and high stability in acidic conditions. This study provides important insights for the in-situ formation and deposition of NPs in high-aspect-ratio structures for energy applications.
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Affiliation(s)
- Aikaterini Touni
- Department of ChemistryAristotle University of Thessaloniki54124ThessalonikiGreece
| | - Xin Liu
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
| | - Xiaolan Kang
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
| | | | - Spyros Diplas
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
- SINTEF IndustryPOB 124 Blindern0314OsloNorway
| | - Kevin G. Both
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
| | | | - Athanasios Chatzitakis
- Centre for Materials Science and NanotechnologyDepartment of ChemistryUniversity of OsloGaustadalléen 210349OsloNorway
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8
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Kang X, Chaperman L, Galeckas A, Ammar S, Mammeri F, Norby T, Chatzitakis A. Water Vapor Photoelectrolysis in a Solid-State Photoelectrochemical Cell with TiO 2 Nanotubes Loaded with CdS and CdSe Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2021; 13:46875-46885. [PMID: 34570462 DOI: 10.1021/acsami.1c13047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In this study, polyol-made CdS and CdSe crystalline nanoparticles (NPs) are loaded by impregnation on TiO2 nanotube arrays (TNTAs) for solar-simulated light-driven photoelectrochemical (PEC) water vapor splitting. For the first time, we introduce a safe way to utilize toxic, yet efficient photocatalysts by integration in solid-state PEC (SSPEC) cells. The enabling features of SSPEC cells are the surface protonic conduction mechanism on TiO2 and the use of polymeric electrolytes, such as Nafion instead of liquid ones, for operation with gaseous reactants, like water vapor from ambient humidity. Herein, we studied the effects of both the operating conditions in gaseous ambient atmospheres and the surface modifications of TNTAs-based photoanodes with well-crystallized CdS and CdSe NPs. We showed 3.6 and 2.5 times increase in the photocurrent density of defective TNTAs modified with CdS and CdSe, respectively, compared to the pristine TNTAs. Electrochemical impedance spectroscopy and structural characterizations attributed the improved performance to the higher conductivity induced by intrinsic defects as well as to the enhanced electron/hole separation at the TiO2/CdS heterojunction under gaseous operating conditions. The SSPEC cells were evaluated by cycling between high relative humidity (RH) (80%) and low RH levels (40%), providing direct evidence of the effect of RH and, in turn, adsorbed water, on the cell performance. Online mass spectrometry indicated the corresponding difference in the H2 production rate. In addition, a complete restoration of the SSPEC cell performance from low to high RH levels was also achieved. The presented system can be employed in off-grid, water depleted, and air-polluted areas for the production of hydrogen from renewable energy and provides a solution for the safe use of toxic, yet efficient photocatalysts.
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Affiliation(s)
- Xiaolan Kang
- Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Gaustadalléen 21, NO-0349 Oslo, Norway
| | - Larissa Chaperman
- Interfaces Traitements Organisation et Dynamique des Systèmes (ITODYS), Université de Paris, 15 Rue Jean-Antoine de Baïf, 75205 Paris, France
| | - Augustinas Galeckas
- Centre for Materials Science and Nanotechnology, Department of Physics, University of Oslo, P. O. Box 1048 Blindern, NO-0316 Oslo, Norway
| | - Souad Ammar
- Interfaces Traitements Organisation et Dynamique des Systèmes (ITODYS), Université de Paris, 15 Rue Jean-Antoine de Baïf, 75205 Paris, France
| | - Fayna Mammeri
- Interfaces Traitements Organisation et Dynamique des Systèmes (ITODYS), Université de Paris, 15 Rue Jean-Antoine de Baïf, 75205 Paris, France
| | - Truls Norby
- Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Gaustadalléen 21, NO-0349 Oslo, Norway
| | - Athanasios Chatzitakis
- Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Gaustadalléen 21, NO-0349 Oslo, Norway
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9
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Li X, Li J, Zhai H, Song M, Wang L, Guan R, Zhang Q, Zhao Z. Efficient Catalytic Fixation Nitrogen Activity Under Visible Light by Molybdenum Doped Mesoporous TiO2. Catal Letters 2021. [DOI: 10.1007/s10562-021-03625-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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10
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Rawool SA, Yadav KK, Polshettiwar V. Defective TiO 2 for photocatalytic CO 2 conversion to fuels and chemicals. Chem Sci 2021; 12:4267-4299. [PMID: 34163693 PMCID: PMC8179507 DOI: 10.1039/d0sc06451c] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/20/2021] [Indexed: 12/29/2022] Open
Abstract
Photocatalytic conversion of CO2 into fuels and valuable chemicals using solar energy is a promising technology to combat climate change and meet the growing energy demand. Extensive effort is going on for the development of a photocatalyst with desirable optical, surface and electronic properties. This review article discusses recent development in the field of photocatalytic CO2 conversion using defective TiO2. It specifically focuses on the different synthesis methodologies adapted to generate the defects and their impact on the chemical, optical and surface properties of TiO2 and, thus, photocatalytic CO2 conversion. It also encompasses theoretical investigations performed to understand the role of defects in adsorption and activation of CO2 and identify the mechanistic pathway which governs the formation and selectivity of different products. It is divided into three parts: (i) general mechanism and thermodynamic criteria for defective TiO2 catalyzed CO2 conversion, (ii) theoretical investigation on the role of defects in the CO2 adsorption-activation and mechanism responsible for the formation and selectivity of different products, and (iii) the effect of variation of physicochemical properties of defective TiO2 synthesized using different methods on the photocatalytic conversion of CO2. The review also discusses the limitations and the challenges of defective TiO2 photocatalysts that need to be overcome for the production of sustainable fuel utilizing solar energy.
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Affiliation(s)
- Sushma A Rawool
- Department of Chemical Sciences, Tata Institute of Fundamental Research (TIFR) Mumbai India +91 8452886556
| | - Kishan K Yadav
- Department of Chemical Sciences, Tata Institute of Fundamental Research (TIFR) Mumbai India +91 8452886556
| | - Vivek Polshettiwar
- Department of Chemical Sciences, Tata Institute of Fundamental Research (TIFR) Mumbai India +91 8452886556
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11
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Visible Light Driven Photocatalytic Decolorization and Disinfection of Water Employing Reduced TiO2 Nanopowders. Catalysts 2021. [DOI: 10.3390/catal11020228] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Defect-engineering of TiO2 can have a major impact on its photocatalytic properties for the degradation of persisting and non-biodegradable pollutants. Herein, a series of intrinsic and extrinsic defects are induced by post annealing of crystalline TiO2 under different reducing atmospheres. A detailed optoelectronic characterization sheds light on the key characteristics of the defect-engineered TiO2 nanopowders that are linked to the photocatalytic performance of the prepared photocatalysts. The photodegradation of a model dye, malachite green, as well as the inactivation of bacterial endospores of the Geobacillus stearothermophilus species were studied in the presence of the developed catalysts under visible light illumination. Our results indicate that a combination of certain defects is necessary for the improvement of the photocatalytic process for water purification and disinfection under visible light.
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12
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Wang Q, Zhang S, He H, Xie C, Tang Y, He C, Shao M, Wang H. Oxygen Vacancy Engineering in Titanium Dioxide for Sodium Storage. Chem Asian J 2021; 16:3-19. [PMID: 33150730 DOI: 10.1002/asia.202001172] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/02/2020] [Indexed: 11/09/2022]
Abstract
Titanium dioxide (TiO2 ) is a promising anode material for sodium-ion batteries (SIBs) due to its low cost, natural abundance, nontoxicity, and excellent electrochemical stability. Oxygen vacancies, the most common point defects in TiO2 , can dramatically influence the physical and chemical properties of TiO2 , including band structure, crystal structure and adsorption properties. Recent studies have demonstrated that oxygen-deficient TiO2 can significantly enhance sodium storage performance. Considering the importance of oxygen vacancies in modifying the properties of TiO2 , the structural properties, common synthesis strategies, characterization techniques, as well as the contribution of oxygen-deficient TiO2 on initial Coulombic efficiency, cyclic stability, rate performance for sodium storage are comprehensively described in this review. Finally, some perspectives on the challenge and future opportunities for the development of oxygen-deficient TiO2 are proposed.
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Affiliation(s)
- Qi Wang
- Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P. R. China
| | - Shan Zhang
- Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P. R. China
| | - Hanna He
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu, 610065, P. R. China
| | - Chunlin Xie
- Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P. R. China
| | - Yougen Tang
- Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P. R. China
| | - Chuanxin He
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, P. R. China
| | - Minhua Shao
- Department of Chemical and Biological Engineering, Energy Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, P. R. China.,Fok Ying Tung Research Institute, Hong Kong University of Science and Technology, Guangzhou, 511458, P. R. China
| | - Haiyan Wang
- Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, P. R. China
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13
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Denisov N, Qin S, Cha G, Yoo J, Schmuki P. Photoelectrochemical properties of “increasingly dark” TiO2 nanotube arrays. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114098] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Wang J, Wang Y, Wang W, Peng T, Liang J, Li P, Pan D, Fan Q, Wu W. Visible light driven Ti 3+ self-doped TiO 2 for adsorption-photocatalysis of aqueous U(VI). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 262:114373. [PMID: 32443204 DOI: 10.1016/j.envpol.2020.114373] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/03/2020] [Accepted: 03/12/2020] [Indexed: 06/11/2023]
Abstract
The photocatalytic reduction of U(VI) is recognized as an economical and effective way for U(VI) removal/recovery from solutions. To improve the photocatalytic activity of TiO2 under visible light, TiO2 was hydrogenated by NaBH4 to generate Ti3+ self-doped black TiO2 (BTn). The self-doped Ti3+ alongside oxygen vacancies (Ov) could act as interband level to increase visible light capture and reduce the recombination of photogenerated carriers. The obtained BTn samples showed high performance for U(VI) elimination under near neutral conditions, and held an outstanding anti-interference for U(VI) over competing metal cations and anions. Methanol and ethanol could act as sacrificial donors, being favorable for the photocatalytic reduction of U(VI), while the presence of EDTA inhibited the photoreduction of U(VI). The BTn photocatalysts showed relatively high stability and reusability during the photocatalysis and elution processes. The XPS, TEM and XRD results revealed that U(VI) was photo-reduced to form UO2 on the surface of BTn. This work may serve as an important reference for improving the photocatalytic reactivity of TiO2 as well as for the efficient removal/recovery of U(VI) from aqueous solutions.
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Affiliation(s)
- Jingjing Wang
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China; Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China
| | - Yun Wang
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China
| | - Wei Wang
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China
| | - Tong Peng
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200062, China
| | - Jianjun Liang
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China
| | - Ping Li
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China.
| | - Duoqiang Pan
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Qiaohui Fan
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou, 730000, China
| | - Wangsuo Wu
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
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15
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Yu S, Han B, Lou Y, Qian G, Wang Z. Nano Anatase TiO2 Quasi-Core–Shell Homophase Junction Induced by a Ti3+ Concentration Difference for Highly Efficient Hydrogen Evolution. Inorg Chem 2020; 59:3330-3339. [DOI: 10.1021/acs.inorgchem.0c00277] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Siqi Yu
- State Key laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Bing Han
- State Key laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yunchao Lou
- State Key laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Guodong Qian
- State Key laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhiyu Wang
- State Key laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
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16
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Jawdat FH, Lin J, Dou SX, Park MS, Nattestad A, Kim JH. Oxygen-Deficient TiO2-δ Synthesized from MIL-125 Metal-Organic Framework for Photocatalytic Dye Degradation. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20190238] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Fanar Hussein Jawdat
- Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM), University of Wollongong, North Wollongong, NSW 2500, Australia
- Department of Mechanical Engineering, College of Engineering, University of Baghdad, Iraq
| | - Jianjian Lin
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Shi Xue Dou
- Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM), University of Wollongong, North Wollongong, NSW 2500, Australia
| | - Min-Sik Park
- Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 17104, Korea
| | - Andrew Nattestad
- Intelligent Polymer Research Institute (IPRI), ARC Centre of Excellence for Electromaterials Science, AIIM, University of Wollongong, North Wollongong, NSW 2500, Australia
| | - Jung Ho Kim
- Institute for Superconducting and Electronic Materials (ISEM), Australian Institute for Innovative Materials (AIIM), University of Wollongong, North Wollongong, NSW 2500, Australia
- Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, 17104, Korea
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