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Plaça LF, Vital PLS, Gomes LE, Roveda AC, Cardoso DR, Martins CA, Wender H. Black TiO 2 Photoanodes for Direct Methanol Photo Fuel Cells. ACS APPLIED MATERIALS & INTERFACES 2023; 15:43259-43271. [PMID: 35856741 DOI: 10.1021/acsami.2c04802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Photocatalytic fuel cells (PFCs) are considered the next generation of energy converter devices, since they can harvest solar energy through relatively low-cost semiconductor material to convert the chemical energy of renewable fuels and oxidants directly into electricity. Here, we report black TiO2 nanoparticle (NP) photoanodes for simple single-compartment PFCs and microfluidic photo fuel cells (μPFCs) fed by methanol. We show that Ti3+ and oxygen vacancy (OV) defects at the TiO2 NPs are easily controlled by annealing in a NaBH4-containing atmosphere. This optimized noble-metal-free black TiO2 photoanode shows superior PFC performance for methanol oxidation and O2 reduction with a maximum power density (Pmax) ∼2000% higher compared to the undoped TiO2. At flow conditions, the black TiO2 photoanode showed a Pmax ∼90 times higher than the μFC equipped with regular TiO2 in the dark. The PFC and μPFC operate spontaneously with little activation polarization, and black TiO2 photoanodes are stable under light irradiation. The improved photoactivity of the black TiO2 photoanode is a consequence of the self-doping with Ti3+/OV defects, which significantly red-shifted the bandgap energy, induced intragap electronic states, and widened both the valence band and conduction band, enhancing the overall absorption of visible light and decreasing the interfacial charge transfer resistance.
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Affiliation(s)
- Luiz Felipe Plaça
- Nano&Photon Research Group, Institute of Physics, Federal University of Mato Grosso do Sul, 79070-900 Campo Grande, MS, Brazil
| | - Pedro-Lucas S Vital
- Electrochemistry Research Group, Institute of Physics, Federal University of Mato Grosso do Sul, 79070-900 Campo Grande, MS, Brazil
| | - Luiz Eduardo Gomes
- Nano&Photon Research Group, Institute of Physics, Federal University of Mato Grosso do Sul, 79070-900 Campo Grande, MS, Brazil
- Centro de Tecnologias Estratégicas do Nordeste, Av. Prof. Luiz Freire 01, Recife, Pernambuco 50740-540, Brazil
| | - Antonio Carlos Roveda
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, SP 13566-590, Brazil
| | | | - Cauê Alves Martins
- Electrochemistry Research Group, Institute of Physics, Federal University of Mato Grosso do Sul, 79070-900 Campo Grande, MS, Brazil
| | - Heberton Wender
- Nano&Photon Research Group, Institute of Physics, Federal University of Mato Grosso do Sul, 79070-900 Campo Grande, MS, Brazil
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Lin X, Yu YH, Chen GH, Li QH, Zhang L, Zhang J. Ligand-dependent structural diversity and optimizable CO 2 chemical fixation activities of Cu-doped polyoxo-titanium clusters. Dalton Trans 2023; 52:11451-11457. [PMID: 37547997 DOI: 10.1039/d3dt01718d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Heterometallic oxo clusters have been attracting intensive interest due to their unique properties originating from the synergistic interactions between different components. Herein, we report the construction and catalytic applications of a family of copper-doped polyoxo-titanium clusters (Cu-PTCs) coordinated with different acetate derivative ligands. The solvothermal reactions of metal salts and trimethylacetic acid or 1,2-phenylenediacetic acid in ethanol produced Ti6Cu3(μ3-O)4(μ2-O)(OEt)16(L1)4 (L1 = trimethyl acetate, PTC-367) and H2Ti8Cu2Br2(μ4-O)2(μ2-O)4(OEt)20(L2)2 (L2 = 1,2-phenylenediacetate, PTC-368), respectively. When smaller acetic acid was introduced as a stabilizing ligand, higher nuclei H2Ti16Cu3(μ4-O)5(μ3-O)15(μ2-O)3(OiPr)18(Ac)8 (Ac = acetate, PTC-369) and H3Ti29Cu3(μ4-O)6(μ3-O)30(μ2-O)8(OiPr)17(Ac)20 (PTC-370) were prepared. The number of metal ions exposed on the surface of the four clusters changes due to variations in the steric hindrance of functionalizing ligands, and theoretically, so does their catalytic activity as Lewis acids. In light of this, we conducted a carbon dioxide cycloaddition reaction in an atmospheric environment and the four obtained compounds displayed increasing catalytic activities from PTC-367 to PTC-370. These results provide a feasible synthetic method for modulating the structures of Cu-doped titanium oxide materials and improving their catalytic activities.
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Affiliation(s)
- Xin Lin
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Ying-Hua Yu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Guang-Hui Chen
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
| | - Qiao-Hong Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
| | - Lei Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
| | - Jian Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
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Wang X, Ma S, Liu B, Wang S, Huang W. Imperfect makes perfect: defect engineering of photoelectrodes towards efficient photoelectrochemical water splitting. Chem Commun (Camb) 2023; 59:10044-10066. [PMID: 37551587 DOI: 10.1039/d3cc02843g] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
Photoelectrochemical (PEC) water splitting for hydrogen evolution has been considered as a promising technology to solve the energy and environmental issues. However, the solar-to-hydrogen (STH) conversion efficiencies of current PEC systems are far from meeting the commercial demand (10%) due to the lack of efficient photoelectrode materials. The recent rapid development of defect engineering of photoelectrodes has significantly improved the PEC performance, which is expected to break through the bottleneck of low STH efficiency. In this review, the category and the construction methods of different defects in photoelectrode materials are summarized. Based on the in-depth summary and analysis of existing reports, the PEC performance enhancement mechanism of defect engineering is critically discussed in terms of light absorption, carrier separation and transport, and surface redox reactions. Finally, the application prospects and challenges of defect engineering for PEC water splitting are presented, and the future research directions in this field are also proposed.
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Affiliation(s)
- Xin Wang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
| | - Siqing Ma
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
| | - Boyan Liu
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
| | - Songcan Wang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
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4
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Habib A, Khan MS, Zubair M, Hasan IU. Ni-Doped In 2O 3 Nanoparticles and Their Composite with rGO for Efficient Degradation of Organic Pollutants in Wastewater under Visible Light Irradiation. Int J Mol Sci 2023; 24:ijms24097950. [PMID: 37175664 PMCID: PMC10178878 DOI: 10.3390/ijms24097950] [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: 03/29/2023] [Revised: 04/15/2023] [Accepted: 04/19/2023] [Indexed: 05/15/2023] Open
Abstract
The efficient degradation of organic effluent is always desirable when using advanced photocatalysts with enhanced activity under visible light. Nickel-doped indium oxide (Ni-In2O3) is synthesized via a hydrothermal route as well as its composites with reduced graphene oxide (rGO). Facile synthesis and composite formation methods lead to a well-defined morphology of fabricated nanocomposite at low temperatures. The bandgap energy of indium oxide lies in the range of 3.00-4.30 eV. Its high light absorption capacity, high stability, and non-toxicity make it a choice as a photocatalyst that is active under visible light. The transition metal Ni-doping changes the indium oxide's chemical, optical, and physicochemical properties. The Ni-In2O3 and rGO composites improved the charge transport and reduced the charge recombination. The phase analysis of the developed photocatalysts was performed using X-ray diffraction (XRD), and the morphological and structural properties were observed using advanced microscopic techniques (SEM and TEM), while UV-vis and FTIR spectroscopic techniques were used to confirm the structure and optical and chemical properties. The electrochemical properties of the photocatalysts were investigated using cyclic voltammetry (CV), linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS), and the charge-transfer properties of the obtained photocatalysts and the mechanism of the photocatalytic degradation mechanism of methylene blue, a common dye used in the dyeing industry, were determined.
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Affiliation(s)
- Amir Habib
- Department of Physics, College of Science, University of Hafr Al Batin, P.O. Box 1803, Hafr Al Batin 39524, Saudi Arabia
| | - Muhammad Shahzeb Khan
- Department of Mechanical Engineering, College of Engineering, University of Hafr Al Batin, P.O. Box 1803, Hafr Al Batin 39524, Saudi Arabia
| | - Muhammad Zubair
- Department of Physics, College of Science, University of Hafr Al Batin, P.O. Box 1803, Hafr Al Batin 39524, Saudi Arabia
| | - Iftikhar Ul Hasan
- Department of Physics, College of Science, University of Hafr Al Batin, P.O. Box 1803, Hafr Al Batin 39524, Saudi Arabia
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Xu H, Xu D, Deng S, Li D, Jiang T, Li L, Fan W, Lei Y, Shi W. Photochemical and electrochemical co-regulation of the BiVO 4 photoanode for water splitting. Chem Commun (Camb) 2023; 59:3435-3438. [PMID: 36857644 DOI: 10.1039/d2cc07093f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A novel pretreatment strategy that can regulate the amount of oxygen vacancies (Ovac) across the wormlike-BiVO4 photoanode by photochemical and electrochemical co-processing. Upon decorating NiFeOx as an oxygen evolution cocatalyst for promoting the surface oxidation kinetics, a record-high photocurrent density of 6.42 mA cm-2 is obtained at 1.23 vs. RHE (100 mW cm-2).
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Affiliation(s)
- Huimin Xu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
| | - Dongbo Xu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
| | - Shuang Deng
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
| | - Dan Li
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
| | - Tianyao Jiang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
| | - Longhua Li
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
| | - Weiqiang Fan
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
| | - Yong Lei
- Institute of Physics and IMN MacroNano®, Ilmenau University of Technology, IImenau 98693, Germany
| | - Weidong Shi
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China.
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6
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Man S, Yin Z, Zhou S, Pameté E, Xu L, Bao H, Yang W, Mo Z, Presser V, Li X. Novel Sb-SnO 2 Electrode with Ti 3+ Self-Doped Urchin-Like Rutile TiO 2 Nanoclusters as the Interlayer for the Effective Degradation of Dye Pollutants. CHEMSUSCHEM 2023; 16:e202201901. [PMID: 36524753 DOI: 10.1002/cssc.202201901] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/08/2022] [Indexed: 06/17/2023]
Abstract
Stable and efficient SnO2 electrodes are very promising for effectively degrading refractory organic pollutants in wastewater treatment. In this regard, we firstly prepared Ti3+ self-doped urchin-like rutile TiO2 nanoclusters (TiO2-x NCs) on a Ti mesh substrate by hydrothermal and electroreduction to serve as an interlayer for the deposition of Sb-SnO2 . The TiO2-x NCs/Sb-SnO2 anode exhibited a high oxygen evolution potential (2.63 V vs. SCE) and strong ⋅OH generation ability for the enhanced amount of absorbed oxygen species. Thus, the degradation results demonstrated its good rhodamine B (RhB), methylene blue (MB), alizarin yellow R (AYR), and methyl orange (MO) removal performance, with the rate constant increased 5.0, 1.9, 1.9, and 4.7 times, respectively, compared to the control Sb-SnO2 electrode. RhB and AYR degradation mechanisms are also proposed based on the results of high-performance liquid chromatography coupled with mass spectrometry and quenching experiments. More importantly, this unique rutile interlayer prolonged the anode lifetime sixfold, given its good lattice match with SnO2 and the three-dimensional concave-convex structure. Consequently, this work paves a new way for designing the crystal form and structure of the interlayers to obtain efficient and stable SnO2 electrodes for addressing dye wastewater problems.
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Affiliation(s)
- Shuaishuai Man
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, P. R. China
- INM - Leibniz Institute for New Materials, 66123, Saarbrücken, Germany
| | - Zehao Yin
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, P. R. China
| | - Shanbin Zhou
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, P. R. China
| | - Emmanuel Pameté
- INM - Leibniz Institute for New Materials, 66123, Saarbrücken, Germany
| | - Lei Xu
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, P. R. China
| | - Hebin Bao
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, P. R. China
| | - Wenjing Yang
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, P. R. China
| | - Zhihong Mo
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, P. R. China
| | - Volker Presser
- INM - Leibniz Institute for New Materials, 66123, Saarbrücken, Germany
- Department of Materials Science and Engineering, Saarland University, 66123, Saarbrücken, Germany
- Saarene - Saarland Center for Energy Materials and Sustainability, Saarland University, Campus D4 2, 66123, Saarbrücken, Germany
| | - Xueming Li
- College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, P. R. China
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Liu F, Cao H, Xu L, Fu H, Sun S, Xiao Z, Sun C, Long X, Xia Y, Wang S. Design and preparation of highly active TiO 2 photocatalysts by modulating their band structure. J Colloid Interface Sci 2023; 629:336-344. [PMID: 36162391 DOI: 10.1016/j.jcis.2022.09.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 08/24/2022] [Accepted: 09/04/2022] [Indexed: 10/14/2022]
Abstract
Titanium dioxide photocatalysts with high reduction potential and visible light response hold great promise in photochemical conversion. Here, we used a simple glycine doping method to synthesize novel N-TiO2@C photocatalysts with upward shifted conduction bands and narrowed band gaps as well as inhibited recombination of photoinduced electron-hole pairs. The N-TiO2@C photocatalysts exhibited higher visible light response and remarkably enhanced photocatalytic activity in the production of nicotinamide adenine dinucleotide (NADH) by photomediated reduction of NAD+ without any electron mediator. The yield of NADH was up to 70.3 % far greater than that of the undoped TiO2 (11.3 %), and it stabilized at ca. 60 % after 10 cycles. The viability of coupling NADH regeneration with enzymatic reaction (alcohol dehydrogenase) was established in aldehyde reduction where formaldehyde was specifically reduced to methanol. These findings shed new light on the modulation of the band structure of semiconductors and develop an electron mediator free strategy for NADH-dependent artificial photosynthesis through coupled photocatalytic and enzymatic approaches.
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Affiliation(s)
- Fangyuan Liu
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Han Cao
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Luyi Xu
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Hui Fu
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Shiyong Sun
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China
| | - Zijun Xiao
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Caiheng Sun
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Xing Long
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Yongqing Xia
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Shengjie Wang
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China.
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Ling P, Zhu J, Wang Z, Hu J, Zhu J, Yan W, Sun Y, Xie Y. Ultrathin Ti-doped WO 3 nanosheets realizing selective photoreduction of CO 2 to CH 3OH. NANOSCALE 2022; 14:14023-14028. [PMID: 36112105 DOI: 10.1039/d2nr02364d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Arduous CO2 activation and sluggish charge transfer retard the photoreduction of CO2 to CH3OH with high efficiency and selectivity. Here, we fabricate ultrathin Ti-doped WO3 nanosheets possessing approving active sites and optimized carrier dynamics as a promising catalyst. Quasi in situ X-ray photoelectron spectroscopy and synchrotron-radiation X-ray absorption near-edge spectroscopy firmly confirm that the true active sites for CO2 reduction are the W sites rather the Ti sites, while the Ti dopants can facilitate charge transfer, which accelerates the generation of crucial COOH* intermediates as revealed by in situ Fourier-transform infrared spectroscopy and density functional theory calculations. Besides, the Gibbs free energy calculations also validate that Ti doping can lower the energy barrier of CO2 activation and CH3OH desorption by 0.22 eV and 0.42 eV, respectively, thus promoting the formation of CH3OH. In consequence, the Ti-doped WO3 ultrathin nanosheets show a superior CH3OH selectivity of 88.9% and reach a CH3OH evolution rate of 16.8 μmol g-1 h-1, about 3.3 times higher than that on WO3 nanosheets. This work sheds light on promoting CO2 photoreduction to CH3OH by rational elemental doping.
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Affiliation(s)
- Peiquan Ling
- Hefei National Research Center for Physical Sciences at the Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China.
| | - Juncheng Zhu
- Hefei National Research Center for Physical Sciences at the Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China.
| | - Zhiqiang Wang
- Hefei National Research Center for Physical Sciences at the Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China.
| | - Jun Hu
- Hefei National Research Center for Physical Sciences at the Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China.
| | - Junfa Zhu
- Hefei National Research Center for Physical Sciences at the Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China.
| | - Wensheng Yan
- Hefei National Research Center for Physical Sciences at the Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China.
| | - Yongfu Sun
- Hefei National Research Center for Physical Sciences at the Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China.
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, China
| | - Yi Xie
- Hefei National Research Center for Physical Sciences at the Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China.
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, China
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9
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Preparation of amorphous Bi4V0.2Ti2.8O12 and its photocatalytic activity for the degradation of Basic Red 2. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04765-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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Zhang X, Tang P, Zhai G, Lin X, Zhang Q, Chen J, Wei X. Regulating Phase Junction and Oxygen Vacancies of TiO2 Nanoarrays for Boosted Photoelectrochemical Water Oxidation. Chem Res Chin Univ 2022. [DOI: 10.1007/s40242-022-2076-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Lan K, Wei Q, Zhao D. Versatile Synthesis of Mesoporous Crystalline TiO 2 Materials by Monomicelle Assembly. Angew Chem Int Ed Engl 2022; 61:e202200777. [PMID: 35194915 DOI: 10.1002/anie.202200777] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Indexed: 11/10/2022]
Abstract
Mesoscale TiO2 structures have realized many technological applications-ranging from catalysis and biomedicine to energy storage and conversion-because of their large mesoporosities offering desirable accessibility and mass transport. Tailoring mesoporous TiO2 structures with novel mesoscopic and microscopic configurations is envisaged to offer ample opportunities for further applications. In this Review, we explain how to synthesize novel mesoporous TiO2 materials and present recent examples. An emphasis is placed on a "monomicelle assembly" strategy as an emerging and powerful approach to direct the formation of mesostructured TiO2 with precise control over its structural orientations and architectures. Furthermore, typical examples of mesoporous TiO2 for applications in batteries and photocatalysis are highlighted. The Review ends with an outlook towards the synthesis of mesoporous TiO2 with tailored architectures by self-assembly, which could pave the way for developing advanced energy conversion and storage devices.
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Affiliation(s)
- Kun Lan
- Laboratory of Advanced Materials, Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433, P. R. China
| | - Qiulong Wei
- Department of Materials Science and Engineering, Fujian Key Laboratory of Materials Genome, Xiamen Key Laboratory of High Performance Metals and Materials, College of Materials, Xiamen University, Xiamen, 361005, P. R. China
| | - Dongyuan Zhao
- Laboratory of Advanced Materials, Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433, P. R. China
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12
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Lan K, Wei Q, Zhao D. Versatile Synthesis of Mesoporous Crystalline TiO
2
Materials by Monomicelle Assembly. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kun Lan
- Laboratory of Advanced Materials Department of Chemistry State Key Laboratory of Molecular Engineering of Polymers iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Fudan University Shanghai 200433 P. R. China
| | - Qiulong Wei
- Department of Materials Science and Engineering Fujian Key Laboratory of Materials Genome Xiamen Key Laboratory of High Performance Metals and Materials College of Materials Xiamen University Xiamen 361005 P. R. China
| | - Dongyuan Zhao
- Laboratory of Advanced Materials Department of Chemistry State Key Laboratory of Molecular Engineering of Polymers iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Fudan University Shanghai 200433 P. R. China
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13
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Xu Y, Liu Z, Wang K, Niu C, Yuan P, Zheng JY, Kang YS, Zhang XL. Trace surface fluorination and tungsten-intercalation cooperated dual modification induced photo-activity enhancement of titanium dioxide. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2021.12.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Zhang DY, Liu H, Younis MR, Lei S, Chen Y, Huang P, Lin J. In-situ TiO 2-x decoration of titanium carbide MXene for photo/sono-responsive antitumor theranostics. J Nanobiotechnology 2022; 20:53. [PMID: 35090484 PMCID: PMC8796495 DOI: 10.1186/s12951-022-01253-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 01/09/2022] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Sonodynamic therapy (SDT) has emerged as a noninvasive therapeutic modality that involves sonosensitizers and low-intensity ultrasound. However, owing to the rapid recombination of charge carriers, most of the sonosensitizers triggered poor reactive oxygen species (ROS) generation, resulting in unsatisfactory sonodynamic therapeutic effects. RESULTS Herein, a photo/sono-responsive nanoplatform was developed through the in-situ systhesis of TiO2-x on the surface of two-dimensional MXene (titanium carbide, Ti3C2) for photoacoustic/photothermal bimodal imaging-guided near-infrared II (NIR-II) photothermal enhanced SDT of tumor. Because of several oxygen vacancies and smaller size (~ 10 nm), the in-situ formed TiO2-x nanoparticles possessed narrow band gap (2.65 eV) and high surface area, and thus served as a charge trap to restrict charge recombination under ultrasound (US) activation, resulting in enhanced sonodynamic ROS generation. Moreover, Ti3C2 nanosheets induced extensive localized hyperthermia relieves tumor hypoxia by accelerating intratumoral blood flow and tumor oxygenation, and thus further strengthened the efficacy of SDT. Upon US/NIR-II laser dual-stimuli, Ti3C2@TiO2-x nanoplatform triggered substantial cellular killing in vitro and complete tumor eradication in vivo, without any tumor recurrence and systemic toxicity. CONCLUSION Our work presents the promising design of photo/sono-responsive nanoplatform for cancer nanotheranostics.
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Affiliation(s)
- Dong-Yang Zhang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University Wenzhou, Zhejiang, 325000, China
- International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Marshall Laboratory of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Hengke Liu
- International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Marshall Laboratory of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Muhammad Rizwan Younis
- International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Marshall Laboratory of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Shan Lei
- International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Marshall Laboratory of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Yunzhi Chen
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University Wenzhou, Zhejiang, 325000, China
| | - Peng Huang
- International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Marshall Laboratory of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518060, China.
| | - Jing Lin
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University Wenzhou, Zhejiang, 325000, China.
- International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Marshall Laboratory of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518060, China.
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Zhang J, Zhou Z, Feng Z, Zhao H, Zhao G. Fast Generation of Hydroxyl Radicals by Rerouting the Electron Transfer Pathway via Constructed Chemical Channels during the Photo-Electro-Reduction of Oxygen. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:1331-1340. [PMID: 34792352 DOI: 10.1021/acs.est.1c06368] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
A strategy for the fast generation of hydroxyl radicals (HO·) via photo-electro-reduction of oxygen by rerouting the electron transfer pathway was proposed. The rate-determining step of HO· production is the formation of H2O2 and the simultaneous reduction of H2O2. Engineering of F-TiO2 with single atom Pd bonded with four F and two O atoms favored the electrocatalytic 2-electron oxygen reduction to H2O2 with as high as 99% selectivity, while the additional channel bond HO-O···Pd-F-TiO2 facilitates the photogenerated electron transfer from the conduction band to single atom Pd to reduce Pd···O-OH to HO·. The optimized HO· production rate is 9.18 μ mol L-1 min-1, which is 2.6-52.5 times higher than that in traditional advanced oxidation processes. In the application of wastewater treatment, this proposed photoelectrocatalytic oxygen reduction method, respectively, shows fast kinetics of 0.324 and 0.175 min-1 for removing bisphenol A and acetaminophen. Around 93.2% total organic carbon and 99.3% acute toxicity removal were achieved. Additionally, the degradation efficiency was less affected by the water source and pH value because of the evitable usage of metallic active sites. This work represents a fundamental investigation on the generation rate of HO·, which would pave the way for the future development of photoelectrocatalytic technologies for water purification.
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Affiliation(s)
- Jinxing Zhang
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| | - Zhaoyu Zhou
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| | - Zhiyuan Feng
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| | - Hongying Zhao
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
| | - Guohua Zhao
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092, P. R. China
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16
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Engineering surface oxygen vacancy of mesoporous CeO2 nanosheets assembled microspheres for boosting solar-driven photocatalytic performance. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.06.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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17
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Zhang Y, Zhang Y, Zhang H, Bai L, Hao L, Ma T, Huang H. Defect engineering in metal sulfides for energy conversion and storage. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214147] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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18
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Yamazaki Y, Mori K, Kuwahara Y, Kobayashi H, Yamashita H. Defect Engineering of Pt/TiO 2-x Photocatalysts via Reduction Treatment Assisted by Hydrogen Spillover. ACS APPLIED MATERIALS & INTERFACES 2021; 13:48669-48678. [PMID: 34615345 DOI: 10.1021/acsami.1c13756] [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
Defect engineering of metal oxides is a facile and promising strategy to improve their photocatalytic activity. In the present study, Pt/TiO2-x was prepared by a reduction treatment assisted by hydrogen spillover to pure rutile, anatase, and brookite and was subsequently used for hydrogen production from an aqueous methanol solution. With increasing reduction temperature, the photocatalytic activity of the rutile Pt/TiO2-x increased substantially, whereas the activity of anatase Pt/TiO2-x decreased and that of brookite Pt/TiO2-x was independent of the treatment temperature. Electron-spin resonance analysis revealed that rutile and brookite possess similar defect sites (Ti3+ and concomitant oxygen vacancy) after the reduction at 600 °C, whereas different resonance signals were observed for anatase after the reduction at 600 °C. During the reduction process, electrons donated from spillover hydrogen migrate between the conduction band and the inherent midgap states. This research demonstrates that the depth of the inherent midgap states, depending on the crystal phases, influences the generation of defects, which play a key role in the photocatalytic performance of Pt/TiO2-x.
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Affiliation(s)
- Yukari Yamazaki
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Osaka 565-0871, Japan
| | - Kohsuke Mori
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Osaka 565-0871, Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
| | - Yasutaka Kuwahara
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Osaka 565-0871, Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
- JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Hisayoshi Kobayashi
- Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Hiromi Yamashita
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Osaka 565-0871, Japan
- Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
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19
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Sun B, Bu J, Du Y, Chen X, Li Z, Zhou W. O, S-Dual-Vacancy Defects Mediated Efficient Charge Separation in ZnIn 2S 4/Black TiO 2 Heterojunction Hollow Spheres for Boosting Photocatalytic Hydrogen Production. ACS APPLIED MATERIALS & INTERFACES 2021; 13:37545-37552. [PMID: 34340307 DOI: 10.1021/acsami.1c10943] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Defective ZnIn2S4 nanosheets/mesoporous black TiO2 heterojunction hollow spheres (H-ZIS/b-TiO2) are prepared through hydrothermal and surface low-temperature hydrogenation strategies, which show broad-spectrum response and excellent charge separation efficiency. This H-ZIS/b-TiO2 flower-like heterojunction hollow spheres with a narrow band gap of ∼1.88 eV expand the light response to visible light and show excellent photocatalytic hydrogen evolution rate (278 μmol h-1 50 mg-1) under visible-light irradiation, which is 1.5 times as high as that of ZnIn2S4/black TiO2 heterojunction hollow spheres (ZIS/b-TiO2) (181 μmol h-1 50 mg-1). The excellent photocatalytic performance is due to the formation of O, S dual vacancies in b-TiO2 and H-ZIS providing more active sites for photocatalytic reaction and improving the charge separation efficiency, heterojunctions promoting transport of photogenerated carriers, and the hollow structure increasing light utilization by reflecting light. The novel heterojunction hollow sphere with high performance has broad application prospects in the field of energy.
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Affiliation(s)
- Bojing Sun
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Jiaqi Bu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yunchen Du
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Xiaoyu Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Zhenzi Li
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, China
| | - Wei Zhou
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Chemical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, China
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20
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Guo C, Li L, Chen F, Ning J, Zhong Y, Hu Y. One-step phosphorization preparation of gradient-P-doped CdS/CoP hybrid nanorods having multiple channel charge separation for photocatalytic reduction of water. J Colloid Interface Sci 2021; 596:431-441. [DOI: 10.1016/j.jcis.2021.03.170] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/27/2021] [Accepted: 03/29/2021] [Indexed: 12/14/2022]
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21
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Tsao CW, Fang MJ, Hsu YJ. Modulation of interfacial charge dynamics of semiconductor heterostructures for advanced photocatalytic applications. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213876] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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22
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Su YQ, Xia GJ, Qin Y, Ding S, Wang YG. Lattice oxygen self-spillover on reducible oxide supported metal cluster: the water-gas shift reaction on Cu/CeO 2 catalyst. Chem Sci 2021; 12:8260-8267. [PMID: 34194718 PMCID: PMC8208302 DOI: 10.1039/d1sc01201k] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 05/11/2021] [Indexed: 11/21/2022] Open
Abstract
In this work we have tackled one of the most challenging problems in nanocatalysis namely understanding the role of reducible oxide supports in metal catalyzed reactions. As a prototypical example, the very well-studied water gas shift reaction catalyzed by CeO2 supported Cu nanoclusters is chosen to probe how the reducible oxide support modifies the catalyst structures, catalytically active sites and even the reaction mechanisms. By employing density functional theory calculations in conjunction with a genetic algorithm and ab initio molecular dynamics simulations, we have identified an unprecedented spillover of the surface lattice oxygen from the ceria support to the Cu cluster, which is rarely considered previously but may widely exist in oxide supported metal catalysts under realistic conditions. The oxygen spillover causes a highly energetic preference of the monolayered configuration of the supported Cu nanocluster, compared to multilayered configurations. Due to the strong metal-oxide interaction, after the O spillover the monolayered cluster is highly oxidized by transferring electrons to the Ce 4f orbitals. The water-gas-shift reaction is further found to more favorably take place on the supported copper monolayer than the copper-ceria periphery, where the on-site oxygen and the adjacent oxidized Cu sites account for the catalytically active sites, synergistically facilitating the water dissociation and the carboxyl formation. The present work provides mechanistic insights into the strong metal-support interaction and its role in catalytic reactions, which may pave a way towards the rational design of metal-oxide catalysts with promising stability, dispersion and catalytic activity.
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Affiliation(s)
- Ya-Qiong Su
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology Shenzhen Guangdong 518055 China
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University Xi'an 710049 China
- Laboratory of Inorganic Materials and Catalysis, Schuit Institute of Catalysis, Eindhoven University of Technology P. O. Box 513 5600 MB Eindhoven The Netherlands
| | - Guang-Jie Xia
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology Shenzhen Guangdong 518055 China
| | - Yanyang Qin
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University Xi'an 710049 China
| | - Shujiang Ding
- School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University Xi'an 710049 China
| | - Yang-Gang Wang
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology Shenzhen Guangdong 518055 China
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23
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Im JK, Sohn EJ, Kim S, Jang M, Son A, Zoh KD, Yoon Y. Review of MXene-based nanocomposites for photocatalysis. CHEMOSPHERE 2021; 270:129478. [PMID: 33418219 DOI: 10.1016/j.chemosphere.2020.129478] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/26/2020] [Accepted: 12/27/2020] [Indexed: 05/27/2023]
Abstract
Since multilayered MXenes (Ti3C2Tx, a new family of two-dimensional materials) were initially introduced by researchers at Drexel University in 2011, various MXene-based nanocomposites have received increased attention as photocatalysts owing to their exceptional properties (e.g., rich surface chemistry, adjustable bandgap structures, high electrical conductivity, hydrophilicity, thermal stability, and large specific surface area). Therefore, we present a comprehensive review of recent studies on fabrication methods for MXene-based photocatalysts and photocatalytic performance for contaminant degradation, CO2 reduction, H2 evolution, and N2 fixation with various MXene-based nanocomposites. In addition, this review briefly discusses the stability of MXene-based nanophotocatalysts, current limitations, and future research needs, along with the various corresponding challenges, in an effort to reveal the unique properties of MXene-based nanocomposites.
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Affiliation(s)
- Jong Kwon Im
- National Institute of Environmental Research, Han River Environment Research Center, 42, Dumulmeori-gil 68beon-gil, Yangseo-myeon, Yangpyeong-gun, Gyeonggi-do, 12585, Republic of Korea
| | - Erica Jungmin Sohn
- Department of Environmental Health, School of Public Health, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Sewoon Kim
- Department of Civil and Environmental Engineering, University of South Carolina, Columbia, 300 Main Street, SC, 29208, USA
| | - Min Jang
- Department of Environmental Engineering, Kwangwoon University, 20 Kwangwoon-Ro, Nowon-Gu, Seoul, 01897, Republic of Korea
| | - Ahjeong Son
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, 03760, Republic of Korea
| | - Kyung-Duk Zoh
- Department of Environmental Health, School of Public Health, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Yeomin Yoon
- Department of Civil and Environmental Engineering, University of South Carolina, Columbia, 300 Main Street, SC, 29208, USA.
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24
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Guo C, Tian K, Wang L, Liang F, Wang F, Chen D, Ning J, Zhong Y, Hu Y. Approach of fermi level and electron-trap level in cadmium sulfide nanorods via molybdenum doping with enhanced carrier separation for boosted photocatalytic hydrogen production. J Colloid Interface Sci 2021; 583:661-671. [DOI: 10.1016/j.jcis.2020.09.093] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/15/2020] [Accepted: 09/23/2020] [Indexed: 02/07/2023]
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25
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Zhang X, Ma G, Shui L, Zhou G, Wang X. Direct Growth of Oxygen Vacancy-Enriched Co 3O 4 Nanosheets on Carbon Nanotubes for High-Performance Supercapacitors. ACS APPLIED MATERIALS & INTERFACES 2021; 13:4419-4428. [PMID: 33433991 DOI: 10.1021/acsami.0c21330] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Ultrathin Co3O4 nanosheets (NSs) with abundant oxygen vacancies on conductive carbon nanotube (CNT) nanocomposites (termed as Co3O4-NSs/CNTs) are easily achieved by an effective NaBH4-assisted cyanogel hydrolysis strategy under ambient conditions. The specific capacitance of Co3O4-NSs/CNTs with 5% CNT mass can reach 1280.4 F g-1 at 1 A g-1 and retain 112.5% even after 10 000 cycles, demonstrating very high electrochemical capability and stability. When assembled in the two-electrode Co3O4-NSs/CNTs-5%//reduced graphene oxide (rGO) system, a maximum specific energy density of 37.2 Wh kg-1 (160.2 W kg-1) is obtained at room temperature. Ultrathin structure of nanosheets, abundant oxygen vacancies, and the synergistic effect between Co3O4-NSs and CNTs are crucial factors for excellent electrochemical performance. Specifically, these characteristics favor rapid electron transfer, complete exposure of the active interface, and sufficient adsorption/desorption of electrolyte ions within the active material. This work gives insights into the efficient construction of two-dimensional hybrid electrodes with high performance for the new-generation energy storage system.
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Affiliation(s)
- Xiaoyu Zhang
- South China Academy of Advanced Optoelectronics & International Academy of Optoelectronics at Zhaoqing, South China Normal University, Guangdong 510631, P. R. China
| | - Ge Ma
- South China Academy of Advanced Optoelectronics & International Academy of Optoelectronics at Zhaoqing, South China Normal University, Guangdong 510631, P. R. China
| | - Lingling Shui
- South China Academy of Advanced Optoelectronics & International Academy of Optoelectronics at Zhaoqing, South China Normal University, Guangdong 510631, P. R. China
| | - Guofu Zhou
- South China Academy of Advanced Optoelectronics & International Academy of Optoelectronics at Zhaoqing, South China Normal University, Guangdong 510631, P. R. China
| | - Xin Wang
- South China Academy of Advanced Optoelectronics & International Academy of Optoelectronics at Zhaoqing, South China Normal University, Guangdong 510631, P. R. China
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26
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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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27
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Zhang S, Si Y, Li B, Yang L, Dai W, Luo S. Atomic-Level and Modulated Interfaces of Photocatalyst Heterostructure Constructed by External Defect-Induced Strategy: A Critical Review. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2004980. [PMID: 33289948 DOI: 10.1002/smll.202004980] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/26/2020] [Indexed: 06/12/2023]
Abstract
Despite the existence of numerous photocatalyst heterostructures, their separation efficiency and charge flow precision remain low due to the poor study on interfacial properties. The photocatalysts with confined defects can effectively control the photogenerated carrier migration, but the metastability of such defects considerably decreases the photocatalyst stability. Meanwhile, the introduction of defective region can increase the coordinative unsaturation and delocalize local electrons to promote their interactions with the molecules/ions in that region. The selective growth of modulated heterogeneous interface by defect-induced strategy may not only increase the stability of defective structures, but also enhance the migration of interfacial charges. Using this method, photocatalytic heterostructures with low contact resistances and intimate interfaces are constructed to achieve the optimal charge migration in terms of efficiency and accuracy. In this work, the point, linear, and planar heterogeneous interfaces and related defect engineering techniques are discussed. Particularly, it is focused on the external, defect-induced interfacial heterogeneities with various spatial and dimensional configurations, which exhibit modulated and controllable interfacial properties. Furthermore, the main aspects of fabricating photocatalyst heterostructures by the defect-induced strategy, including the i) controllable generation of defects, ii) advanced characterization methods, and iii) elaborate construction of the minimal interface, are described.
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Affiliation(s)
- Shuqu Zhang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Yanmei Si
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Bing Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Lixia Yang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Weili Dai
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
| | - Shenglian Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, Jiangxi Province, 330063, P. R. China
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28
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Dong Q, Shuai C, Mo Z, Guo R, Liu N, Liu G, Wang J, Liu W, Chen Y, Liu J, Jiang Y, Gao Q. The in situ derivation of a NiFe-LDH ultra-thin layer on Ni-BDC nanosheets as a boosted electrocatalyst for the oxygen evolution reaction. CrystEngComm 2021. [DOI: 10.1039/d0ce01796e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A Ni-based metal organic framework (Ni-BDC) and subsequently derived NiFe-LDH were studied to overcome the defect of the low availability of active sites for the oxygen evolution reaction (OER) during the water splitting process.
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29
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Zhao C, Yang Y, Luo L, Shao S, Zhou Y, Shao Y, Zhan F, Yang J, Zhou Y. γ-ray induced formation of oxygen vacancies and Ti 3+ defects in anatase TiO 2 for efficient photocatalytic organic pollutant degradation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 747:141533. [PMID: 32795806 DOI: 10.1016/j.scitotenv.2020.141533] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 08/04/2020] [Accepted: 08/04/2020] [Indexed: 06/11/2023]
Abstract
Oxygen vacancies and Ti3+ defects in anatase TiO2 have attracted great attention to address the insufficient optical absorption and photoinduced charge-carrier separation in photocatalysis. In this study, we demonstrate a superficial and innovative approach for synthesizing anatase TiO2 nanoparticles with abundant oxygen vacancies via γ-ray irradiation reduction at room temperature. X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) confirm that oxygen vacancies and Ti3+ defects can be quantitatively and extensively obtained by merely regulating the irradiation dosage. Photoelectrochemical measurements suggest that oxygen vacancies and Ti3+ defects promoted the separation of electron-hole pairs and then enhanced the photocatalytic degradation performance for organic pollutant. In comparison with TiO2 (no irradiation), the sample (49.5 kGy irradiation) exhibited a 20.0-fold enhancement in visible-light decomposition of phenol. In addition, the results of scavenge experiments and mechanism analysis revealed that O2- are the dominant active species. The excited electrons generated at the conduction band and oxygen vacancy level of TiO2-x-49.5 conspicuously contributes to generate much more ·O2- species. This novel study shows at room temperature, the γ-ray approach of irradiation leads to faster formation and quantification of oxygen vacancies in the semiconductor materials.
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Affiliation(s)
- Caifeng Zhao
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China; Hunan Institute of Nuclear Agricultural Science and Space Breeding, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Yahui Yang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
| | - Lin Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
| | - Sai Shao
- Hunan Institute of Nuclear Agricultural Science and Space Breeding, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Yiji Zhou
- Hunan Institute of Nuclear Agricultural Science and Space Breeding, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Ying Shao
- Hunan Institute of Nuclear Agricultural Science and Space Breeding, Hunan Academy of Agricultural Sciences, Changsha 410125, China
| | - Faqi Zhan
- State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
| | - Jian Yang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
| | - Yaoyu Zhou
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
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30
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Xu Y, Tay TF, Cui L, Fan J, Niu C, Chen D, Guo ZX, Sun C, Zhang XL, Caruso RA. Trace-Level Fluorination of Mesoporous TiO 2 Improves Photocatalytic and Pb(II) Adsorbent Performances. Inorg Chem 2020; 59:17631-17637. [PMID: 33179923 DOI: 10.1021/acs.inorgchem.0c02869] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Fluorination is an effective way of tuning the physicochemical property and activity of TiO2 nanocrystallites, which usually requires a considerable amount of hydrofluoric acid (or NH4F) for a typical F/Ti molar ratio, RF, of 0.5-69.0 during synthesis. This has consequential environmental issues due to the high toxicity and hazard of the reactants. In the present work, an environmentally benign fluorination approach is demonstrated that uses only a trace amount of sodium fluoride with an RF of 10-6 during synthesis. While it maintained the desirable high surface area (102.4 m2/g), the trace-level fluorination enabled significant enhancements on photocatalytic activities (e.g., a 56% increase on hydrogen evolution rate) and heavy metal Pb(II) removal (31%) of the mesoporous TiO2. This can be attributed to enriched Ti3+ and localized spatial charge separation due to fluorination as proved by X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance spectroscopy (EPR), and density functional theory (DFT) analyses.
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Affiliation(s)
| | - Teng Fern Tay
- School of Chemical Engineering, The University of New South Wales, Sydney 2052, Australia
| | | | | | | | - Dehong Chen
- Applied Chemistry and Environmental Science, School of Science, RMIT University, Melbourne, VIC 3001, Australia
| | - Zheng Xiao Guo
- Department of Chemistry and Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong SAR
| | - Chenghua Sun
- Department of Chemistry and Biotechnology, Swinburne University of Technology, Melbourne, VIC 3122, Australia
| | | | - Rachel A Caruso
- Applied Chemistry and Environmental Science, School of Science, RMIT University, Melbourne, VIC 3001, Australia
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31
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Gao WY, Ngo HT, Niu Z, Zhang W, Pan Y, Yang Z, Bhethanabotla VR, Joseph B, Aguila B, Ma S. A Mixed-Metal Porphyrinic Framework Promoting Gas-Phase CO 2 Photoreduction without Organic Sacrificial Agents. CHEMSUSCHEM 2020; 13:6273-6277. [PMID: 32743964 DOI: 10.1002/cssc.202001610] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 07/29/2020] [Indexed: 06/11/2023]
Abstract
A photoactive porphyrinic metal-organic framework (MOF) has been prepared by exchanging Ti into a Zr-based MOF precursor. The resultant mixed-metal Ti/Zr porphyrinic MOF demonstrates much-improved efficiency for gas-phase CO2 photoreduction into CH4 and CO under visible-light irradiation using water vapor compared to the parent Zr-MOF. Insightful studies have been conducted to probe the photocatalysis processes. This work provides the first example of gas-phase CO2 photoreduction into methane without organic sacrificial agents on a MOF platform, thereby paving an avenue for developing MOF-based photocatalysts for application in CO2 photoreduction and other types of photoreactions.
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Affiliation(s)
- Wen-Yang Gao
- Department of Chemistry, New Mexico Institute of Mining & Technology, 801 Leroy Place, Socorro, New Mexico, 87801, United States
| | - Huong T Ngo
- Department of Chemical and Biomedical Engineering, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620, United States
| | - Zheng Niu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, Jiangsu, P. R. China
| | - Weijie Zhang
- Department of Chemistry, University of North Texas, 1508 W Mulberry St, Denton, TX 76201, United States
| | - Yanxiong Pan
- Department of Chemistry and Biochemistry, North Dakota State University, 1231 Albrecht Bld., Fargo, ND 58108, United States
| | - Zhongyu Yang
- Department of Chemistry and Biochemistry, North Dakota State University, 1231 Albrecht Bld., Fargo, ND 58108, United States
| | - Venkat R Bhethanabotla
- Department of Chemical and Biomedical Engineering, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620, United States
| | - Babu Joseph
- Department of Chemical and Biomedical Engineering, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620, United States
| | - Briana Aguila
- Department of Chemistry, Francis Marion University, 4822 E. Palmetto St, Florence, SC 29506, United States
| | - Shengqian Ma
- Department of Chemistry, University of North Texas, 1508 W Mulberry St, Denton, TX 76201, United States
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620, United States)
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32
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Liu C, Wu Y, Meng X, Zhao A, Shao Y, Liu W, Huang X, Pan F, Liu W. Construction of Two Novel Titanium Oxide Clusters: Copper Ion Introducing Enhances Photocatalytic Performance. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000715] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Chengdong Liu
- College of Chemistry and Chemical Engineering Lanzhou University 730000 Lanzhou P.R. China
| | - Yixin Wu
- College of Chemistry and Chemical Engineering Lanzhou University 730000 Lanzhou P.R. China
| | - Xiangyu Meng
- College of Chemistry and Chemical Engineering Lanzhou University 730000 Lanzhou P.R. China
| | - An Zhao
- College of Chemistry and Chemical Engineering Lanzhou University 730000 Lanzhou P.R. China
| | - Yongliang Shao
- College of Chemistry and Chemical Engineering Lanzhou University 730000 Lanzhou P.R. China
| | - Wei Liu
- College of Chemistry and Chemical Engineering Lanzhou University 730000 Lanzhou P.R. China
| | - Xin Huang
- College of Chemistry and Chemical Engineering Lanzhou University 730000 Lanzhou P.R. China
| | - Fu‐Xing Pan
- College of Chemistry and Chemical Engineering Lanzhou University 730000 Lanzhou P.R. China
| | - Weisheng Liu
- College of Chemistry and Chemical Engineering Lanzhou University 730000 Lanzhou P.R. China
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33
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RF nitrogen plasma irradiation of metal-doped TiO2 nanowire arrays as an effective technique for improved light transmission and optical bandgap manipulation. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2020.110922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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34
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Pt Deposites on TiO2 for Photocatalytic H2 Evolution: Pt Is Not Only the Cocatalyst, but Also the Defect Repair Agent. Catalysts 2020. [DOI: 10.3390/catal10091047] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Pt, as a common cocatalyst, has been widely used in photocatalytic H2 evolution. However, the specific role of Pt in photocatalytic H2 evolution has not been thoroughly studied. In this paper, by employing three Pt sources with different charges (positive, negative and neutral), we systematically studied the charge effect of Pt sources on photocatalytic H2 evolution via TiO2 catalyst. According to the results of Raman, X-ray photoelectron spectroscopy (XPS), recycle experiments and photocurrent characterizations, it was found that TiO2 would produce electropositive defects during photocatalytic H2 evolution, inevitably leading to the decline of H2 production activity. Thanks to the electrostatic interaction, the electronegative Pt source not only promoted charge separation, but preferential deposited on electropositive defects, which acted as the defect repair agent, and thus resulted in the increased photocatalytic stability. This work may provide a new perspective for enhancing photocatalytic stability of hydrogen production.
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35
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Cai J, Zhou M, Xu X, Du X. Stable boron and cobalt co-doped TiO 2 nanotubes anode for efficient degradation of organic pollutants. JOURNAL OF HAZARDOUS MATERIALS 2020; 396:122723. [PMID: 32344364 DOI: 10.1016/j.jhazmat.2020.122723] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 04/09/2020] [Accepted: 04/10/2020] [Indexed: 06/11/2023]
Abstract
Anode materials are crucial to anodic oxidation for wastewater treatment. In this regard, stable boron and cobalt co-doped TiO2 nanotube (B, Co-TNT) was prepared for the first time, and its lifetime was found increased significantly while electrocatalytic activity decreased with the increase of Co(NO3)2 in preparation from 1 to 10 mM. Characterized by scanning electron microscope (SEM), X-Ray Diffraction (XRD) and X-ray Photo-electronic Spectroscopy (XPS), B and Co content were optimized and successfully doped on TNT, which was more smooth without ripple with Co content of 0.038 mg/cm2 in a valence of +2, and B atomic content of 2.17 at.% in form of Ti-B-O. This optimized anode enhanced electrode lifetime 122.8 times while the electrochemical activity decreased slightly when compared to the undoped TNT. The effects of current density, initial pH and initial 2,4-dichlorophenoxyacetic acid (2,4-D) concentration were investigated, and the mainly responsible radical for degradation was confirmed to be the surface OH on B, Co-TNT anode. This anode had better performance on the TOC removal, mineralization current density (MCE) and energy consumption (Ec) when compared with BDD, PbO2, DSA and Pt anodes, and it also presented a very stable degradation for 10 cycles oxidation of 20 mg/L 2,4-D with allowable Co leaching. Therefore, B, Co-TNT anode is a promising, stable, safety and cost-effective anode for application in electrochemical advanced oxidation processes (EAOPs).
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Affiliation(s)
- Jingju Cai
- Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Minghua Zhou
- Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| | - Xin Xu
- Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Xuedong Du
- Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
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36
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Lan K, Wang R, Wei Q, Wang Y, Hong A, Feng P, Zhao D. Stable Ti
3+
Defects in Oriented Mesoporous Titania Frameworks for Efficient Photocatalysis. Angew Chem Int Ed Engl 2020; 59:17676-17683. [DOI: 10.1002/anie.202007859] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Kun Lan
- Laboratory of Advanced Materials Department of Chemistry State Key Laboratory of Molecular Engineering of Polymers iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Fudan University Shanghai 200433 P. R. China
- Department of Chemistry University of California Riverside CA 92521 USA
| | - Ruicong Wang
- Laboratory of Advanced Materials Department of Chemistry State Key Laboratory of Molecular Engineering of Polymers iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Fudan University Shanghai 200433 P. R. China
| | - Qiulong Wei
- Department of Materials Science and Engineering Fujian Key Laboratory of Materials Genome, College of Materials Xiamen University Xiamen 361005 P. R. China
| | - Yanxiang Wang
- Department of Chemistry University of California Riverside CA 92521 USA
| | - Anh Hong
- Department of Chemistry University of California Riverside CA 92521 USA
| | - Pingyun Feng
- Department of Chemistry University of California Riverside CA 92521 USA
| | - Dongyuan Zhao
- Laboratory of Advanced Materials Department of Chemistry State Key Laboratory of Molecular Engineering of Polymers iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Fudan University Shanghai 200433 P. R. China
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37
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Lan K, Wang R, Wei Q, Wang Y, Hong A, Feng P, Zhao D. Stable Ti
3+
Defects in Oriented Mesoporous Titania Frameworks for Efficient Photocatalysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007859] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kun Lan
- Laboratory of Advanced Materials Department of Chemistry State Key Laboratory of Molecular Engineering of Polymers iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Fudan University Shanghai 200433 P. R. China
- Department of Chemistry University of California Riverside CA 92521 USA
| | - Ruicong Wang
- Laboratory of Advanced Materials Department of Chemistry State Key Laboratory of Molecular Engineering of Polymers iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Fudan University Shanghai 200433 P. R. China
| | - Qiulong Wei
- Department of Materials Science and Engineering Fujian Key Laboratory of Materials Genome, College of Materials Xiamen University Xiamen 361005 P. R. China
| | - Yanxiang Wang
- Department of Chemistry University of California Riverside CA 92521 USA
| | - Anh Hong
- Department of Chemistry University of California Riverside CA 92521 USA
| | - Pingyun Feng
- Department of Chemistry University of California Riverside CA 92521 USA
| | - Dongyuan Zhao
- Laboratory of Advanced Materials Department of Chemistry State Key Laboratory of Molecular Engineering of Polymers iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Fudan University Shanghai 200433 P. R. China
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38
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Ma X, Xu Y, Tan L, Zhao Y, Song YF. Visible-Light-Induced Hydrogenation of C═C Bonds by Hydrazine over Ultrathin Layered Double Hydroxide Nanosheets. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c01933] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Xiaodong Ma
- State Key Laboratory of Chemical Resource Engineering and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China
| | - Yanqi Xu
- College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Ling Tan
- State Key Laboratory of Chemical Resource Engineering and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China
| | - Yufei Zhao
- State Key Laboratory of Chemical Resource Engineering and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China
| | - Yu-Fei Song
- State Key Laboratory of Chemical Resource Engineering and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, People’s Republic of China
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39
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Wang S, He T, Chen P, Du A, Ostrikov KK, Huang W, Wang L. In Situ Formation of Oxygen Vacancies Achieving Near-Complete Charge Separation in Planar BiVO 4 Photoanodes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001385. [PMID: 32406092 DOI: 10.1002/adma.202001385] [Citation(s) in RCA: 106] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/08/2020] [Accepted: 04/15/2020] [Indexed: 06/11/2023]
Abstract
Despite a suitable bandgap of bismuth vanadate (BiVO4 ) for visible light absorption, most of the photogenerated holes in BiVO4 photoanodes are vanished before reaching the surfaces for oxygen evolution reaction due to the poor charge separation efficiency in the bulk. Herein, a new sulfur oxidation strategy is developed to prepare planar BiVO4 photoanodes with in situ formed oxygen vacancies, which increases the majority charge carrier density and photovoltage, leading to a record charge separation efficiency of 98.2% among the reported BiVO4 photoanodes. Upon loading NiFeOx as an oxygen evolution cocatalyst, a stable photocurrent density of 5.54 mA cm-2 is achieved at 1.23 V versus the reversible hydrogen electrode (RHE) under AM 1.5 G illumination. Remarkably, a dual-photoanode configuration further enhances the photocurrent density up to 6.24 mA cm-2 , achieving an excellent applied bias photon-to-current efficiency of 2.76%. This work demonstrates a simple thermal treatment approach to generate oxygen vacancies for the design of efficient planar photoanodes for solar hydrogen production.
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Affiliation(s)
- Songcan Wang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
- Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Tianwei He
- School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Peng Chen
- Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Aijun Du
- School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Kostya Ken Ostrikov
- School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
| | - Lianzhou Wang
- Nanomaterials Centre, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
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40
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Synergistic Design of Anatase–Rutile TiO2 Nanostructured Heterophase Junctions toward Efficient Photoelectrochemical Water Oxidation. COATINGS 2020. [DOI: 10.3390/coatings10060557] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Synergistically designing porous nanostructures and appropriate band alignment for TiO2 heterophase junctions is key to efficient charge transfer, which is crucial in enhancing photoelectrochemical (PEC) water splitting for hydrogen production. Here, we investigate the efficiency of PEC water oxidation in anatase–rutile TiO2 nanostructured heterophase junctions that present the type-II band alignment. We specifically prove the importance of a phase alignment in heterophase junction for effective charge separation. The TiO2 heterophase junctions were prepared by transferring TiO2 nanotube (TNT) arrays onto FTO substrate with the help of a TiO2 nanoparticle (TNP) glue layer. The PEC characterization reveals that the rutile (R)-TNT/anatase (A)-TNP heterophase junction has a higher photocurrent density than those of A-TNT/R-TNP junction and anatase or rutile single phase, corresponding to twofold enhanced efficiency. This type-II band alignment of R-TNT/A-TNP for water oxidation, in which photogenerated electrons (holes) will flow from rutile (anatase) to anatase (rutile), enables to facilitate efficient electron-hole separation as well as lower the effective bandgap of heterophase junctions. This work provides insight into the functional role of heterophase junction for boosting the PEC performances of TiO2 nanostructures.
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41
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Lin J, Li P, Xu H, Kim Y, Jing Z, Zheng D. Controlled synthesis of mesoporous single-crystalline TiO 2 nanoparticles for efficient photocatalytic H 2 evolution. JOURNAL OF HAZARDOUS MATERIALS 2020; 391:122530. [PMID: 32247703 DOI: 10.1016/j.jhazmat.2020.122530] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 03/06/2020] [Accepted: 03/11/2020] [Indexed: 06/11/2023]
Abstract
Mesoporous single-crystals have emerged as a unique family of functional materials, exhibiting excellent performance in various applications, owing to their well-defined accessible mesoporosity and highly single-crystalline structures. Precise tailoring structures of mesoporous single-crystals at the nanoscale remains an unsolved scientific and technical challenge. Herein, we report a facile and general approach for the synthesis of mesoporous single-crystalline TiO2 nanoparticles (designated as MSC-TNs) with distinctive traits including tunable morphologies, controllable particle sizes, well dispersity, high hydrophilicity, well-defined mesoporosity and single-crystal nature. Specifically, the amount of water employed in the precursor solution was seen to give fine control over the particle sizes and morphologies of MSC-TNs. MSC-TNs with different sizes show excellent photocatalytic activity in production of hydrogen from water. Under the illumination of 300 W Xe lamp, MSC-TNs were shown to provide good photodegradation performance with Rhodamine 6 G, as well as H2 production when loaded 1 wt % Pt. In a CH3OH solution H2 was evolved with a rate of 8.98 mmol h-1 g-1, which is significantly higher than with commercial P25 nanoparticles (4.02 mmol h-1 g-1).
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Affiliation(s)
- Jianjian Lin
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Ping Li
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Huizhong Xu
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Yena Kim
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Zhongxin Jing
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Dehua Zheng
- Key Laboratory of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China; State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, 116024, PR China.
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42
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Dong J, Hu C, Qi W, An X, Liu H, Qu J. Defect-enhanced photocatalytic removal of dimethylarsinic acid over mixed-phase mesoporous TiO 2. J Environ Sci (China) 2020; 91:35-42. [PMID: 32172980 DOI: 10.1016/j.jes.2019.12.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 12/18/2019] [Accepted: 12/19/2019] [Indexed: 06/10/2023]
Abstract
Much attention has been paid to the pollutant dimethylarsenic acid (DMA), because of its high toxicity even at very low doses. Although TiO2 photocatalytic oxidation (PCO) is one of the few effective methods for treating DMA-containing water, the efficient decomposition of DMA and simultaneous removal of toxic arsenic species remains a significant but challenging task. Here, defective mesoporous TiO2 with mixed-phase structure was synthesized and used as both photocatalyst and adsorbent for DMA removal. Due to the reduced band-gap and enhanced separation of photogenerated charge carriers, the oxygen-deficient TiO2 nanostructures exhibited 4.2 times higher PCO efficiency than commercial TiO2 (P25). More importantly, the high surface area of the mesoporous TiO2 provided sufficient active sites for in-situ adsorption and reaction, resulting in the efficient removal of as-formed As(V). Combining the experimental and characterization results, the different roles of reactive species during PCO reactions were clarified. In the presence of hole (h+) as the dominant oxidation species, DMA was demethylated and transformed into MMA. Thereafter, MMA was subsequently reduced to As(III) by photo-generated electrons. Superoxide radicals (O2•-) played a significant role in oxidizing As(III) into As(V), which was finally adsorptively removed by the mesoporous TiO2.
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Affiliation(s)
- Jingjing Dong
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chengzhi Hu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Weixiao Qi
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Xiaoqiang An
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Huijuan Liu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiuhui Qu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
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43
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Li N, Ai L, Jiang J, Liu S. Spinel-type oxygen-incorporated Ni 3+ self-doped Ni 3S 4 ultrathin nanosheets for highly efficient and stable oxygen evolution electrocatalysis. J Colloid Interface Sci 2020; 564:418-427. [PMID: 31923829 DOI: 10.1016/j.jcis.2019.12.036] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 11/12/2019] [Accepted: 12/08/2019] [Indexed: 12/11/2022]
Abstract
Spinel-type structured materials have attracted considerable attention and been regarded as promising alternative catalysts for oxygen evolution reaction (OER). However, the regulation of catalytically active octahedral sites in spinel structure to realize high activity and good stability for OER electrocatalysis is still a great challenge. Herein, we propose a self-doping strategy to boost OER performance of spinel-type Ni3S4 enriched high valence Ni3+ as active sites. By sacrificing Ni-based metal-organic framework, the ultrathin Ni3S4 manosheets are topologically grown on conductive Ni foam substrate and realize the simultaneous Ni3+ self-doping and surface oxygen incorporation during in situ sulfidation conversion process. These compositional and structural characteristics endow it with enhanced adsorption binding strength, enabling the highly efficient OER. As a result, the Ni3S4/NF exhibits excellent activity and outstanding stability toward OER electrocatalysis in alkaline medium, which only demands an ultralow overpotential of 266 mV to deliver a current density of 10 mA cm-2 and manifests the stable OER process for at least 75 h. Moreover, when used as an effective overall water splitting electrolyzer, the Ni3S4/NF achieves a current density of 10 mA cm-2 at only 1.638 V with good long-term stability.
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Affiliation(s)
- Na Li
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, China
| | - Lunhong Ai
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, China; WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, WA 6102, Australia.
| | - Jing Jiang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637002, China; WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, WA 6102, Australia
| | - Shaomin Liu
- WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, WA 6102, Australia.
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Umh HN, Song CK, Lee SY, Bae S, Kim TY, Kim YH, Joo JB, Yi J. Band alignment modulations of metal-semiconductor system for enhanced charge separation directly related to a photocatalytic performance. CATAL COMMUN 2020. [DOI: 10.1016/j.catcom.2019.105921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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45
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Sheng K, Tian X, Jagodič M, Jagličić Z, Zhang N, Liu QY, Tung CH, Sun D. Synthesis, structure and magnetism of a novel CuII4TiIV5 heterometallic cluster. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.05.050] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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46
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Su Z, Liu J, Li M, Zhu Y, Qian S, Weng M, Zheng J, Zhong Y, Pan F, Zhang S. Defect Engineering in Titanium-Based Oxides for Electrochemical Energy Storage Devices. ELECTROCHEM ENERGY R 2020. [DOI: 10.1007/s41918-020-00064-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Li S, Liu C, Chen P, Lv W, Liu G. In-situ stabilizing surface oxygen vacancies of TiO2 nanowire array photoelectrode by N-doped carbon dots for enhanced photoelectrocatalytic activities under visible light. J Catal 2020. [DOI: 10.1016/j.jcat.2019.12.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Zhan F, Liu Y, Wang K, Yang X, Liu M, Qiu X, Li J, Li W. Oxygen-Deficient Nanofiber WO 3-x/WO 3 Homojunction Photoanodes Synthesized via a Novel Metal Self-Reducing Method. ACS APPLIED MATERIALS & INTERFACES 2019; 11:39951-39960. [PMID: 31577406 DOI: 10.1021/acsami.9b13326] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Defect engineering of semiconductors has been identified as an efficient route toward enhancing the photoelectrochemical performances. There is a security threat in the traditional hydrogen annealing process. In this work, the oxygen-defective nanofiber WO3-x/WO3 homojunction photoanode was in situ-synthesized via a novel metal self-reducing method. The as-prepared photoanode exhibits 1.8 times higher solar water oxidation photocurrent density than that of the bare WO3 film at 1.2 V versus Ag/AgCl. The enhanced photoelectrochemical properties originate from the effective charge separation and injection, attributed to the stronger built-in electric field created by the oxygen-deficient homojunction. Importantly, this novel method is universally applicable to synthesize oxygen-deficient semiconductor materials, including films and powders.
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Affiliation(s)
- Faqi Zhan
- State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals , Lanzhou University of Technology , Lanzhou 730050 , China
| | | | | | | | - Min Liu
- Institute of Super-microstructure and Ultrafast Process in Advanced Materials, School of Physics and Electronics , Central South University , Changsha 410083 , China
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Current progress in developing metal oxide nanoarrays-based photoanodes for photoelectrochemical water splitting. Sci Bull (Beijing) 2019; 64:1348-1380. [PMID: 36659664 DOI: 10.1016/j.scib.2019.07.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 06/27/2019] [Accepted: 07/03/2019] [Indexed: 01/21/2023]
Abstract
Solar energy driven photoelectrochemical (PEC) water splitting is a clean and powerful approach for renewable hydrogen production. The design and construction of metal oxide based nanoarray photoanodes is one of the promising strategies to make the continuous breakthroughs in solar to hydrogen conversion efficiency of PEC cells owing to their owned several advantages including enhanced reactive surface at the electrode/electrolyte interface, improved light absorption capability, increased charge separation efficiency and direct electron transport pathways. In this Review, we first introduce the structure, work principle and their relevant efficiency calculations of a PEC cell. We then give a summary of the state-of the-art research in the preparation strategies and growth mechanism for the metal oxide based nanoarrays, and some details about the performances of metal oxide based nanoarray photoanodes for PEC water splitting. Finally, we discuss key aspects which should be addressed in continued work on realizing high-efficiency metal oxide based nanoarray photoanodes for PEC solar water splitting systems.
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