151
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Mohamed HH, Youssef TE. Thiophenyl sulfonated nickel phthalocynine-TiO 2 nanocomposite: Synthesis, characterization and superior visible light photocatalytic activity. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.02.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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152
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Chetia L, Kalita D, Ahmed GA. Enhanced photocatalytic degradation by diatom templated mixed phase titania nanostructure. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.01.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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153
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Tian Z, Cui H, Xu J, Zhu G, Shao F, He J, Huang F. Efficient Charge Separation of In-Situ Nb-Doped TiO2Nanowires for Photoelectrochemical Water-splitting. ChemistrySelect 2017. [DOI: 10.1002/slct.201700319] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Zhangliu Tian
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; 1295 Dingxi Road Shanghai 200050 P.R. China
- University of Chinese Academy of Sciences; 19 Yuquan Road Beijing 100049 P.R. China
| | - Houlei Cui
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; 1295 Dingxi Road Shanghai 200050 P.R. China
| | - Jijian Xu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; 1295 Dingxi Road Shanghai 200050 P.R. China
| | - Guilian Zhu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; 1295 Dingxi Road Shanghai 200050 P.R. China
| | - Feng Shao
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; 1295 Dingxi Road Shanghai 200050 P.R. China
| | - Jianqiao He
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; 1295 Dingxi Road Shanghai 200050 P.R. China
- University of Chinese Academy of Sciences; 19 Yuquan Road Beijing 100049 P.R. China
| | - Fuqiang Huang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; 1295 Dingxi Road Shanghai 200050 P.R. China
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154
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He H, Sun D, Zhang Q, Fu F, Tang Y, Guo J, Shao M, Wang H. Iron-Doped Cauliflower-Like Rutile TiO 2 with Superior Sodium Storage Properties. ACS APPLIED MATERIALS & INTERFACES 2017; 9:6093-6103. [PMID: 28121119 DOI: 10.1021/acsami.6b15516] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Developing advanced anodes for sodium ion batteries is still challenging. In this work, Fe-doped three-dimensional (3D) cauliflower-like rutile TiO2 was successfully synthesized by a facile hydrolysis method followed by a low-temperature annealing process. The influence of Fe content on the structure, morphology, and electrochemical performance was systematically investigated. When utilized as a sodium ion battery anode, 6.99%-Fe-doped TiO2 exhibited the best electrochemical performance. This sample delivered a very high reversible capacity (327.1 mAh g-1 at 16.8 mA g-1) and superior rate performance (160.5 mAh g-1 at 840 mA g-1), as well as long-term cycling stability (no capacity fading at 1680 mA g-1 over 3000 cycles). Density functional theory (DFT) calculations combined with experimental results indicated that the significantly improved sodium storage ability of the Fe-doped sample should be mainly due to the increased oxygen vacancies, narrowed band gap, and lowered sodiation energy barrier, which enabled much higher electronic/ionic conductivities and more favorable sodium ion intercalation into rutile TiO2.
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Affiliation(s)
- Hanna He
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P.R China
| | - Dan Sun
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P.R China
| | - Qi Zhang
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P.R China
| | - Fang Fu
- Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong
| | - Yougen Tang
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P.R China
| | - Jun Guo
- School of Chemistry and Materials Science, Guizhou Normal University , Guiyang 550001, P.R China
| | - Minhua Shao
- Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong
| | - Haiyan Wang
- College of Chemistry and Chemical Engineering, Central South University , Changsha 410083, P.R China
- Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong
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155
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Synergistic Effects of Sm and C Co-Doped Mixed Phase Crystalline TiO₂ for Visible Light Photocatalytic Activity. MATERIALS 2017; 10:ma10020209. [PMID: 28772569 PMCID: PMC5459127 DOI: 10.3390/ma10020209] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 02/06/2017] [Accepted: 02/15/2017] [Indexed: 12/03/2022]
Abstract
Mixed phase TiO2 nanoparticles with element doping by Sm and C were prepared via a facile sol-gel procedure. The UV-Vis light-diffuse reflectance spectroscopy analysis showed that the absorption region of co-doped TiO2 was shifted to the visible-light region, which was attributed to incorporation of samarium and carbon into the TiO2 lattice during high-temperature reaction. Samarium effectively decreased the anatase-rutile phase transformation. The grain size can be controlled by Sm doping to achieve a large specific surface area useful for the enhancement of photocatalytic activity. The photocatalytic activities under visible light irradiation were evaluated by photocatalytic degradation of methylene blue (MB). The degradation rate of MB over the Sm-C co-doped TiO2 sample was the best. Additionally, first-order apparent rate constants increased by about 4.3 times compared to that of commercial Degusssa P25 under the same experimental conditions. Using different types of scavengers, the results indicated that the electrons, holes, and •OH radicals are the main active species for the MB degradation. The high visible-light photocatalytic activity was attributed to low recombination of the photo-generated electrons and holes which originated from the synergistic effect of the co-doped ions and the heterostructure.
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156
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Preparation of TiO2 nanoparticles by sparking technique for enhancing photovoltaic performance of dye-sensitized solar cells. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-2881-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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157
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Wang H, Lin H, Long Y, Ni B, He T, Zhang S, Zhu H, Wang X. Titanocene dichloride (Cp 2TiCl 2) as a precursor for template-free fabrication of hollow TiO 2 nanostructures with enhanced photocatalytic hydrogen production. NANOSCALE 2017; 9:2074-2081. [PMID: 28116371 DOI: 10.1039/c6nr09730h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A one-pot and template-free strategy for synthesizing hollow TiO2 nanostructures (HTSs) is developed by using titanocene dichloride as a titanium source, acetone as a solvent, and ammonia as a basic source. Transmission electron microscopy (TEM) observations demonstrate that the morphology transformation undergoes solid, yolk-shell and then hollow structures, typical of an Ostwald ripening process. Comparative experiments suggest that the mismatched hydrolysis rate of chloride anion and organic cyclopentadiene in unique titanocene dichloride (Cp2TiCl2) molecules should be responsible for the formation of HTSs. The TiO2 nanostructures exhibit controllable morphologies and tunable sizes by mainly adjusting the amounts of the titanium precursor or ammonia. The HTSs show much improved photocatalytic performance as compared with samples of other morphologies in water splitting application, due to the remarkably increased surface area and active sites, and enhanced mass transfer. Our findings reported herein may offer new perspectives in materials chemistry, and energy- and environment-related applications.
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Affiliation(s)
- Haiqing Wang
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Haifeng Lin
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Yong Long
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Bing Ni
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Ting He
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Simin Zhang
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Huihui Zhu
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Xun Wang
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
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158
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Sun HB, Zhou YX, Zhang LL, Yang XL, Cao XZ, Arave H, Fang H, Liang G. Investigations on Zr incorporation into Li3V2(PO4)3/C cathode materials for lithium ion batteries. Phys Chem Chem Phys 2017; 19:5155-5162. [DOI: 10.1039/c6cp07760a] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zr-modified Li3V2(PO4)3/C composites (LVZrP/C and LVP/C-Zr) obtained from different ways exhibit enhanced performance, in which Zr exists not only in the LVP lattice but also on the LVP surface.
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Affiliation(s)
- Hua-Bin Sun
- College of Materials and Chemical Engineering
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid
- China Three Gorges University
- Yichang
- China
| | - Ying-Xian Zhou
- College of Materials and Chemical Engineering
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid
- China Three Gorges University
- Yichang
- China
| | - Lu-Lu Zhang
- College of Materials and Chemical Engineering
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid
- China Three Gorges University
- Yichang
- China
| | - Xue-Lin Yang
- College of Materials and Chemical Engineering
- Hubei Provincial Collaborative Innovation Center for New Energy Microgrid
- China Three Gorges University
- Yichang
- China
| | - Xing-Zhong Cao
- Key Laboratory of Nuclear A Techniques
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing 100049
- China
| | - Hanu Arave
- Department of Physics
- Sam Houston State University
- Huntsville
- USA
| | - Hui Fang
- Department of Physics
- Sam Houston State University
- Huntsville
- USA
| | - Gan Liang
- Department of Physics
- Sam Houston State University
- Huntsville
- USA
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159
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Wang YC, Cho CP. Application of TiO2-graphene nanocomposites to photoanode of dye-sensitized solar cell. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2016.07.036] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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160
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Rho WY, Kim HS, Kim HM, Suh JS, Jun BH. Carbon-doped freestanding TiO2 nanotube arrays in dye-sensitized solar cells. NEW J CHEM 2017. [DOI: 10.1039/c6nj02615j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DSSCs with TiO2 nanotube arrays that were doped with carbon to improve their electron transport for energy conversion efficiency.
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Affiliation(s)
- Won-Yeop Rho
- Department of Bioscience and Biotechnology
- Konkuk University
- Seoul 143-701
- Republic of Korea
- Department of Chemistry
| | - Ho-Sub Kim
- Department of Chemistry
- Seoul National University
- Seoul 151-747
- Republic of Korea
| | - Hyung-Mo Kim
- Department of Bioscience and Biotechnology
- Konkuk University
- Seoul 143-701
- Republic of Korea
| | - Jung Sang Suh
- Department of Chemistry
- Seoul National University
- Seoul 151-747
- Republic of Korea
| | - Bong-Hyun Jun
- Department of Bioscience and Biotechnology
- Konkuk University
- Seoul 143-701
- Republic of Korea
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161
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Xie Z, Shuang S, Ma L, Zhu F, Liu X, Zhang Z. Annealing effect on the photoelectrochemical and photocatalytic performance of TiO2 nanorod arrays. RSC Adv 2017. [DOI: 10.1039/c7ra09801d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The photoelectrochemical and photocatalytic properties of TiO2 nanorod arrays annealed in the air were investigated.
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Affiliation(s)
- Zheng Xie
- State Key Laboratory for New Ceramics and Fine Processing
- School of Materials Science and Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Shuang Shuang
- State Key Laboratory for New Ceramics and Fine Processing
- School of Materials Science and Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Lingwei Ma
- State Key Laboratory for New Ceramics and Fine Processing
- School of Materials Science and Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Fei Zhu
- State Key Laboratory for New Ceramics and Fine Processing
- School of Materials Science and Engineering
- Tsinghua University
- Beijing 100084
- China
| | | | - Zhengjun Zhang
- State Key Laboratory for New Ceramics and Fine Processing
- School of Materials Science and Engineering
- Tsinghua University
- Beijing 100084
- China
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162
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Wang Y, Huang H, Li G, Zhao X, Yu L, Zou C, Xu Y. Electrospun TiO2–SiO2 fibres with hierarchical pores from phase separation. CrystEngComm 2017. [DOI: 10.1039/c7ce00471k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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163
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Yang C, Gao G, Zhang J, Liu R, Fan R, Zhao M, Wang Y, Gan S. Surface oxygen vacancy induced solar light activity enhancement of a CdWO4/Bi2O2CO3 core–shell heterostructure photocatalyst. Phys Chem Chem Phys 2017; 19:14431-14441. [DOI: 10.1039/c7cp02136d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A CdWO4/Bi2O2CO3 core–shell heterostructure photocatalyst was fabricated via a facile two-step hydrothermal process.
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Affiliation(s)
- Chunming Yang
- College of Chemistry
- Jilin University
- Changchun 130026
- P. R. China
- Shen hua zhun neng resources comprehensive development company limited
| | - Guimei Gao
- Shen hua zhun neng resources comprehensive development company limited
- Zhungeer 010300
- P. R. China
| | - Junjun Zhang
- School of Chemistry and Chemical Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Ruiping Liu
- Shen hua zhun neng resources comprehensive development company limited
- Zhungeer 010300
- P. R. China
| | - Ruicheng Fan
- Shen hua zhun neng resources comprehensive development company limited
- Zhungeer 010300
- P. R. China
| | - Ming Zhao
- Shen hua zhun neng resources comprehensive development company limited
- Zhungeer 010300
- P. R. China
| | - Yongwang Wang
- Shen hua zhun neng resources comprehensive development company limited
- Zhungeer 010300
- P. R. China
| | - Shucai Gan
- College of Chemistry
- Jilin University
- Changchun 130026
- P. R. China
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164
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Mazumder J, Yoshikawa H, Miyake H, Shibata T, Tamiya E. Photocatalytic alginate fuel cells for energy production and refining of macroalgae. RSC Adv 2017. [DOI: 10.1039/c7ra05473d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
An alginate fuel cell comprising a TiO2-modified carbon sheet (TiO2/C) anode was developed. The power output of the fuel cell and decomposition of alginate were enhanced by solar irradiation of the anode.
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Affiliation(s)
| | | | | | | | - Eiichi Tamiya
- Department of Applied Physics
- Osaka University
- Suita
- Japan
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165
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Ang JKK, Juay J, Kok YH, Bai H, Sun DD. Multi-dimensional micro-/nano-reactor spheres for sustainable water treatment. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00483d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Micro-/nano-reactor spheres assembled through green synthesis featuring multi-shell hollow, hierarchical, carbonaceous CuO/CuTi3O8/TiO2 for clean water production.
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Affiliation(s)
- Jeremy Koon Keong Ang
- School of Civil and Environmental Engineering
- Nanyang Technological University
- Singapore
| | - Jermyn Juay
- School of Civil and Environmental Engineering
- Nanyang Technological University
- Singapore
| | - Yong Hao Kok
- School of Civil and Environmental Engineering
- Nanyang Technological University
- Singapore
| | - Hongwei Bai
- Nano Sun Pte Ltd
- Innovation Centre
- Nanyang Technological University
- Singapore
| | - Darren D. Sun
- School of Civil and Environmental Engineering
- Nanyang Technological University
- Singapore
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166
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Guo M, Song M, Li S, Yin Z, Song X, Bu Y. Facile and economical synthesis of ZnS nanotubes and their superior adsorption performance for organic dyes. CrystEngComm 2017. [DOI: 10.1039/c7ce00360a] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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167
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Mondal K, Kumar R, Sharma A. Metal-Oxide Decorated Multilayered Three-Dimensional (3D) Porous Carbon Thin Films for Supercapacitor Electrodes. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b03396] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kunal Mondal
- Department of Chemical Engineering, Indian Institute of Technology—Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Rudra Kumar
- Department of Chemical Engineering, Indian Institute of Technology—Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Ashutosh Sharma
- Department of Chemical Engineering, Indian Institute of Technology—Kanpur, Kanpur 208016, Uttar Pradesh, India
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168
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Huang E, Yao X, Wang W, Wu G, Guan N, Li L. SnS2Nanoplates with Specific Facets Exposed for Enhanced Visible-Light-Driven Photocatalysis. CHEMPHOTOCHEM 2016. [DOI: 10.1002/cptc.201600026] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Erwei Huang
- School of Materials Science and Engineering and National Institute for Advanced Materials; Nankai University; Tianjin 300350 China
| | - Xiaolong Yao
- College of Electronic Information and Optical Engineering; Nankai University; Tianjin 300350 China
| | - Weichao Wang
- College of Electronic Information and Optical Engineering; Nankai University; Tianjin 300350 China
| | - Guangjun Wu
- School of Materials Science and Engineering and National Institute for Advanced Materials; Nankai University; Tianjin 300350 China
| | - Naijia Guan
- School of Materials Science and Engineering and National Institute for Advanced Materials; Nankai University; Tianjin 300350 China
- Key Laboratory of Advanced Energy Materials Chemistry of the Ministry of Education and Collaborative Innovation Center of Chemical Science and Engineering; Nankai University; Tianjin 300071 China
| | - Landong Li
- School of Materials Science and Engineering and National Institute for Advanced Materials; Nankai University; Tianjin 300350 China
- Key Laboratory of Advanced Energy Materials Chemistry of the Ministry of Education and Collaborative Innovation Center of Chemical Science and Engineering; Nankai University; Tianjin 300071 China
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169
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Lei Y, Lu X. Reversing the Photocatalytic Activity Orders of Anatase TiO 2Facets by Surface Treatment. ChemistrySelect 2016. [DOI: 10.1002/slct.201601325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yanqiang Lei
- Department of Physics and Materials Science; City University of Hong Kong; Hong Kong SAR
| | - Xiaoqing Lu
- College of Science; China University of Petroleum, Qingdao; Shandong 266580 People's Republic of China
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170
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Torres Arango MA, Valença de Andrade AS, Cipollone DT, Grant LO, Korakakis D, Sierros KA. Robotic Deposition of TiO2 Films on Flexible Substrates from Hybrid Inks: Investigation of Synthesis-Processing-Microstructure-Photocatalytic Relationships. ACS APPLIED MATERIALS & INTERFACES 2016; 8:24659-24670. [PMID: 27568659 DOI: 10.1021/acsami.6b05535] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
TiO2 is an important material widely used in optoelectronic devices due to its semiconducting and photocatalytic properties, nontoxicity, and chemically inert nature. Some indicative applications include water purification systems and energy harvesting. The use of solution, water-based inks for the direct writing of TiO2 on flexible substrates is of paramount importance since it enables low-cost and low-energy intensive large-area manufacturing, compatible with roll-to-roll processing. In this work we study the effect of crystalline TiO2 and polymer addition on the rheological and direct writing properties of Ti-organic/TiO2 inks. We also report on the bridging crystallite formation from the Ti-organic precursor into the TiO2 crystalline phase, under ultraviolet (UV) exposure or mild heat treatments up to 150 °C. Such crystallite formation is found to be enhanced by polymers with strong polarity and pKα such as polyacrylic acid (PAA). X-ray diffraction (XRD) coupled with Raman and X-ray photoelectron (XPS) spectroscopy are used to investigate the crystalline-phase transformation dependence based on the initial TiO2 crystalline-phase concentration and polymer addition. Transmission electron microscopy imaging and selected area electron diffraction patterns confirm the crystalline nature of such bridging printed structures. The obtained inks are patterned on flexible substrates using nozzle-based robotic deposition, a lithography-free, additive manufacturing technique that allows the direct writing of material in specific, digitally predefined, substrate locations. Photocatalytic degradation of methylene blue solutions highlights the potential of the studied films for chemical degradation applications, from low-cost environmentally friendly materials systems.
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Affiliation(s)
- Maria A Torres Arango
- Flexible Electronics for Sustainable Technologies Laboratory (FEST), Department of Mechanical & Aerospace Engineering, West Virginia University , 395 Evansdale Drive, Morgantown, West Virginia 26505, United States
| | - Alana S Valença de Andrade
- Flexible Electronics for Sustainable Technologies Laboratory (FEST), Department of Mechanical & Aerospace Engineering, West Virginia University , 395 Evansdale Drive, Morgantown, West Virginia 26505, United States
| | - Domenic T Cipollone
- Flexible Electronics for Sustainable Technologies Laboratory (FEST), Department of Mechanical & Aerospace Engineering, West Virginia University , 395 Evansdale Drive, Morgantown, West Virginia 26505, United States
| | - Lynnora O Grant
- Flexible Electronics for Sustainable Technologies Laboratory (FEST), Department of Mechanical & Aerospace Engineering, West Virginia University , 395 Evansdale Drive, Morgantown, West Virginia 26505, United States
| | - Dimitris Korakakis
- Material Growth and Characterization Lab, Lane Department of Computer Science and Electrical Engineering, West Virginia University , 395 Evansdale Drive, Morgantown, West Virginia 26505, United States
| | - Konstantinos A Sierros
- Flexible Electronics for Sustainable Technologies Laboratory (FEST), Department of Mechanical & Aerospace Engineering, West Virginia University , 395 Evansdale Drive, Morgantown, West Virginia 26505, United States
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171
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Sun S, Gao P, Yang Y, Yang P, Chen Y, Wang Y. N-Doped TiO2 Nanobelts with Coexposed (001) and (101) Facets and Their Highly Efficient Visible-Light-Driven Photocatalytic Hydrogen Production. ACS APPLIED MATERIALS & INTERFACES 2016; 8:18126-31. [PMID: 27356016 DOI: 10.1021/acsami.6b05244] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
To narrow the band gap (3.2 eV) of TiO2 and extend its practical applicability under sunlight, the doping with nonmetal elements has been used to tune TiO2 electronic structure. However, the doping also brings new recombination centers among the photoinduced charge carriers, which results in a quantum efficiency loss accordingly. It has been proved that the {101} facets of anatase TiO2 are beneficial to generating and transmitting more reductive electrons to promote the H2-evolution in the photoreduction reaction, and the {001} facets exhibit a higher photoreactivity to accelerate the reaction involved of photogenerated hole. Thus, it was considered by us that using the surface heterojunction composed of both {001} and {101} facets may depress the disadvantage of N doping. Fortunately, we successfully synthesized anatase N-doped TiO2 nanobelts with a surface heterojunction of coexposed (101) and (001) facets. As expected, it realized the charge pairs' spatial separation and showed higher photocatalytic activity under a visible-light ray: a hydrogen generation rate of 670 μmol h(-1) g(-1) (much higher than others reported previously in literature of N-doped TiO2 nanobelts).
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Affiliation(s)
- Shuchao Sun
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, and ‡College of Science, Harbin Engineering University , Harbin, Heilongjiang 150001, People's Republic of China
| | - Peng Gao
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, and ‡College of Science, Harbin Engineering University , Harbin, Heilongjiang 150001, People's Republic of China
| | - Yurong Yang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, and ‡College of Science, Harbin Engineering University , Harbin, Heilongjiang 150001, People's Republic of China
| | - Piaoping Yang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, and ‡College of Science, Harbin Engineering University , Harbin, Heilongjiang 150001, People's Republic of China
| | - Yujin Chen
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, and ‡College of Science, Harbin Engineering University , Harbin, Heilongjiang 150001, People's Republic of China
| | - Yanbo Wang
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, and ‡College of Science, Harbin Engineering University , Harbin, Heilongjiang 150001, People's Republic of China
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172
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Razavi-Khosroshahi H, Edalati K, Hirayama M, Emami H, Arita M, Yamauchi M, Hagiwara H, Ida S, Ishihara T, Akiba E, Horita Z, Fuji M. Visible-Light-Driven Photocatalytic Hydrogen Generation on Nanosized TiO2-II Stabilized by High-Pressure Torsion. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01482] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Kaveh Edalati
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Materials Science and Engineering, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Masashige Hirayama
- Department
of Chemistry, Faculty of Sciences, Kyushu University, Fukuoka 812-8581, Japan
| | - Hoda Emami
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
| | - Makoto Arita
- Department
of Materials Science and Engineering, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Miho Yamauchi
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Chemistry, Faculty of Sciences, Kyushu University, Fukuoka 812-8581, Japan
| | - Hidehisa Hagiwara
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Shintaro Ida
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Tatsumi Ishihara
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Etsuo Akiba
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Mechanical Engineering, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Zenji Horita
- International
Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 812-8581, Japan
- Department
of Materials Science and Engineering, Faculty of Engineering, Kyushu University, Fukuoka 812-8581, Japan
| | - Masayoshi Fuji
- Advanced
Ceramics Research Center, Nagoya Institute of Technology, Tajimi 507-0033, Japan
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173
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Muralidharan N, Carter R, Oakes L, Cohn AP, Pint CL. Strain Engineering to Modify the Electrochemistry of Energy Storage Electrodes. Sci Rep 2016; 6:27542. [PMID: 27283872 PMCID: PMC4901311 DOI: 10.1038/srep27542] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 05/19/2016] [Indexed: 11/09/2022] Open
Abstract
Strain engineering has been a critical aspect of device design in semiconductor manufacturing for the past decade, but remains relatively unexplored for other applications, such as energy storage. Using mechanical strain as an input parameter to modulate electrochemical potentials of metal oxides opens new opportunities intersecting fields of electrochemistry and mechanics. Here we demonstrate that less than 0.1% strain on a Ni-Ti-O based metal-oxide formed on superelastic shape memory NiTi alloys leads to anodic and cathodic peak potential shifts by up to ~30 mV in an electrochemical cell. Moreover, using the superelastic properties of NiTi to enable strain recovery also recovers the electrochemical potential of the metal oxide, providing mechanistic evidence of strain-modified electrochemistry. These results indicate that mechanical energy can be coupled with electrochemical systems to efficiently design and optimize a new class of strain-modulated energy storage materials.
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Affiliation(s)
- Nitin Muralidharan
- Interdisciplinary Materials Science Program, Vanderbilt University, Nashville, TN 37235 USA.,Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235 USA
| | - Rachel Carter
- Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235 USA
| | - Landon Oakes
- Interdisciplinary Materials Science Program, Vanderbilt University, Nashville, TN 37235 USA.,Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235 USA
| | - Adam P Cohn
- Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235 USA
| | - Cary L Pint
- Interdisciplinary Materials Science Program, Vanderbilt University, Nashville, TN 37235 USA.,Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235 USA
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174
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Role of crystallinity on the nanomechanical and electrochemical properties of TiO2 nanotubes. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.03.032] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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175
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A comparison between photocatalytic and catalytic oxidation of 2-Propanol over Au/TiO 2 –CeO 2 catalysts. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.01.025] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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176
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Ju P, Wang Y, Sun Y, Zhang D. Controllable one-pot synthesis of a nest-like Bi2WO6/BiVO4 composite with enhanced photocatalytic antifouling performance under visible light irradiation. Dalton Trans 2016; 45:4588-602. [PMID: 26846790 DOI: 10.1039/c6dt00118a] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In this study, a novel visible-light-sensitive Bi2WO6/BiVO4 composite photocatalyst was controllably synthesized through a facile one-pot hydrothermal method. The Bi2WO6/BiVO4 composite exhibited a perfect nest-like hierarchical microsphere structure, which was constructed by the self-assembly of nanoplates with the assistance of polyvinylpyrrolidone (PVP). The growth mechanism of the Bi2WO6/BiVO4 composite and the effect of its structure on its photocatalytic performance was investigated and proposed. Experimental results showed that the Bi2WO6/BiVO4 composites displayed enhanced photocatalytic antifouling activities under visible light irradiation compared to pure Bi2WO6 and BiVO4. Bi2WO6/BiVO4-1 exhibited the best photocatalytic antifouling performance, and almost all (99.99%) Pseudomonas aeruginosa (P. aeruginosa), Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacteria were killed within 30 min. Moreover, the Bi2WO6/BiVO4-1 composite exhibited excellent stability and reusability in the cycled experiments. The photocatalytic antifouling mechanism was proposed based on the active species trapping experiments, revealing that the photo-induced holes (h(+)) and hydroxyl radicals (˙OH) could attack the cell wall and cytoplasmic membrane directly and lead to the death of bacteria. The obviously enhanced photocatalytic activity of the Bi2WO6/BiVO4-1 composite could be mainly attributed to the formation of heterojunctions, accelerating the separation of photo-induced electrons and holes. Furthermore, the large BET surface area combined with the wide photoabsorption region further improved the photocatalytic performance of the Bi2WO6/BiVO4-1 composite. This study provides a new strategy to develop novel composite photocatalysts with enhanced photocatalytic performance for marine antifouling and water purification.
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Affiliation(s)
- Peng Ju
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, PR China.
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177
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Sharma A, Dutta RK, Roychowdhury A, Das D. Studies on structural defects in bare, PVP capped and TPPO capped copper oxide nanoparticles by positron annihilation lifetime spectroscopy and their impact on photocatalytic degradation of rhodamine B. RSC Adv 2016. [DOI: 10.1039/c6ra12795a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Enhanced photocatalytic dye degradation by reducing sizes of surface defects.
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Affiliation(s)
- Aarti Sharma
- Centre of Nanotechnology
- Indian Institute of Technology Roorkee
- Roorkee 247667
- India
| | - Raj Kumar Dutta
- Centre of Nanotechnology
- Indian Institute of Technology Roorkee
- Roorkee 247667
- India
- Department of Chemistry
| | | | - Dipankar Das
- UGC-DAE Consortium for Scientific Research
- Kolkata Centre
- Kolkata-700098
- India
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178
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Amreetha S, Dhanuskodi S, Nithya A, Jothivenkatachalam K. Three way electron transfer of a C–N–S tri doped two-phase junction of TiO2nanoparticles for efficient visible light photocatalytic dye degradation. RSC Adv 2016. [DOI: 10.1039/c5ra25017j] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
C–N–S tridoped TiO2nanoparticles were synthesized by a sol–gel method using thiourea as a compound source of carbon (C), nitrogen (N) and sulphur (S).
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Affiliation(s)
- S. Amreetha
- Nonlinear Optical Materials Laboratory
- School of Physics
- Bharathidasan University
- Tiruchirappalli 620 024
- India
| | - S. Dhanuskodi
- Nonlinear Optical Materials Laboratory
- School of Physics
- Bharathidasan University
- Tiruchirappalli 620 024
- India
| | - A. Nithya
- Department of Chemistry
- Anna University
- BIT Campus
- Tiruchirappalli 620 024
- India
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179
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Ganeshraja AS, Thirumurugan S, Rajkumar K, Zhu K, Wang Y, Anbalagan K, Wang J. Effects of structural, optical and ferromagnetic states on the photocatalytic activities of Sn–TiO2 nanocrystals. RSC Adv 2016. [DOI: 10.1039/c5ra25609g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ferromagnetic Sn–TiO2 nanocrystals were newly developed, and their photocatalytic activity showed structural, luminescent and magnetic dependences.
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Affiliation(s)
| | | | - Kanniah Rajkumar
- Department of Chemistry
- Pondicherry University
- Pondicherry 605014
- India
| | - Kaixin Zhu
- Mössbauer Effect Data Center
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Yanjie Wang
- Mössbauer Effect Data Center
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | | | - Junhu Wang
- Mössbauer Effect Data Center
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
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180
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Wang Y, Huang H, Zhao X, Zou C, Xu Y. Self-template fabrication of one-dimensional hollow and solid porous titania by chemically induced self-transformation. CrystEngComm 2016. [DOI: 10.1039/c6ce00896h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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181
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Shen L, Xu C, Qi X, Cao Y, Tang J, Zheng Y, Jiang L. Highly efficient CuxO/TiO2 catalysts: controllable dispersion and isolation of metal active species. Dalton Trans 2016; 45:4491-5. [PMID: 26885633 DOI: 10.1039/c6dt00055j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
CuxO/TiO2 architectures with enhanced dispersion of the active phase are synthesized by a MOF-templated method. Such composites show excellent catalytic activity for CO oxidation.
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Affiliation(s)
- Lijuan Shen
- National Engineering Research Center of Chemical Fertilizer Catalyst
- Fuzhou University
- Fuzhou
- P.R. China
| | - Congbo Xu
- National Engineering Research Center of Chemical Fertilizer Catalyst
- Fuzhou University
- Fuzhou
- P.R. China
| | - Xinxin Qi
- National Engineering Research Center of Chemical Fertilizer Catalyst
- Fuzhou University
- Fuzhou
- P.R. China
| | - Yanning Cao
- National Engineering Research Center of Chemical Fertilizer Catalyst
- Fuzhou University
- Fuzhou
- P.R. China
| | - Jing Tang
- Ministry of Education & Fujian Provincial Key Laboratory of Analysis and Detection of Food Safety
- Fuzhou University
- Fuzhou
- P.R. China
| | - Yuanhui Zheng
- School of Chemistry
- The University of New South Wales
- Sydney
- Australia
| | - Lilong Jiang
- National Engineering Research Center of Chemical Fertilizer Catalyst
- Fuzhou University
- Fuzhou
- P.R. China
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182
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Cai Y, Li H, Karlsson M, Leifer K, Engqvist H, Xia W. Biomineralization on single crystalline rutile: the modulated growth of hydroxyapatite by fibronectin in a simulated body fluid. RSC Adv 2016. [DOI: 10.1039/c6ra04303h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The aim of this study is to probe the complex interaction between surface bioactivity and protein adsorption on single crystalline rutile.
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Affiliation(s)
- Yixiao Cai
- Applied Materials Science
- Department of Engineering Sciences
- Ångström Laboratory
- Uppsala University
- Uppsala
| | - Hu Li
- Applied Materials Science
- Department of Engineering Sciences
- Ångström Laboratory
- Uppsala University
- Uppsala
| | - Mikael Karlsson
- Applied Materials Science
- Department of Engineering Sciences
- Ångström Laboratory
- Uppsala University
- Uppsala
| | - Klaus Leifer
- Applied Materials Science
- Department of Engineering Sciences
- Ångström Laboratory
- Uppsala University
- Uppsala
| | - Håkan Engqvist
- Applied Materials Science
- Department of Engineering Sciences
- Ångström Laboratory
- Uppsala University
- Uppsala
| | - Wei Xia
- Applied Materials Science
- Department of Engineering Sciences
- Ångström Laboratory
- Uppsala University
- Uppsala
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183
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Gupta SK, Sudarshan K, Ghosh PS, Sanyal K, Srivastava AP, Arya A, Pujari PK, Kadam RM. Luminescence of undoped and Eu3+ doped nanocrystalline SrWO4 scheelite: time resolved fluorescence complimented by DFT and positron annihilation spectroscopic studies. RSC Adv 2016. [DOI: 10.1039/c5ra23876e] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Effect of annealing temperature on photophysical characteristics of pure and SrWO4:Eu3+ nanoparticles were investigated and the changes observed correlated with density function theory (DFT) and positron annihilation lifetime spectroscopy (PALS).
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Affiliation(s)
- Santosh K. Gupta
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - K. Sudarshan
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - P. S. Ghosh
- Materials Science Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - K. Sanyal
- Fuel Chemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - A. P. Srivastava
- Materials Science Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - A. Arya
- Materials Science Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - P. K. Pujari
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - R. M. Kadam
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
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184
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Perumbilavil S, Sridharan K, Abraham AR, Janardhanan HP, Kalarikkal N, Philip R. Nonlinear transmittance and optical power limiting in magnesium ferrite nanoparticles: effects of laser pulsewidth and particle size. RSC Adv 2016. [DOI: 10.1039/c6ra15788b] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report comparative measurements of size dependent nonlinear transmission and optical power limiting in nanocrystalline magnesium ferrite (MgFe2O4) particles excited by short (nanosecond) and ultrashort (femtosecond) laser pulses.
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Affiliation(s)
- Sreekanth Perumbilavil
- Ultrafast and Nonlinear Optics Lab
- Light and Matter Physics Group
- Raman Research Institute
- Bangalore 560080
- India
| | - Kishore Sridharan
- Department of Physics
- National Institute of Technology Karnataka
- Mangaluru 575025
- India
| | - Ann Rose Abraham
- School of Pure and Applied Physics
- Mahatma Gandhi University
- Kottayam 686560
- India
| | | | - Nandakumar Kalarikkal
- School of Pure and Applied Physics
- Mahatma Gandhi University
- Kottayam 686560
- India
- International and Interuniversity Centre for Nanoscience and Nanotechnology
| | - Reji Philip
- Ultrafast and Nonlinear Optics Lab
- Light and Matter Physics Group
- Raman Research Institute
- Bangalore 560080
- India
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185
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Wang L, Gao J, Wu B, Kan K, Xu S, Xie Y, Li L, Shi K. Designed Synthesis of In₂O₃ Beads@TiO₂-In₂O₃ Composite Nanofibers for High Performance NO₂ Sensor at Room Temperature. ACS APPLIED MATERIALS & INTERFACES 2015; 7:27152-9. [PMID: 26579939 DOI: 10.1021/acsami.5b09496] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Porous single crystal In2O3 beads@TiO2-In2O3 composite nanofibers (TINFs) have been prepared via a facile electrospinning method. The beads were formed because of the existence of hemimicelles in pecursor solution. The formation of hemimicelles was attributed to the synergy of tetrabutyl titanate (TBT) and polyvinylpyrrolidone (PVP). Abundant In(3+) ions were drawn toward the ketonic oxygen of PVP resulting in In(3+) ions aggregation. Compared with pristine In2O3 nanofibers (INFs), the as-prepared TINFs exhibited excellent properties for sensing NO2 gas at room temperature (25 °C). The enhanced sensing property was due to much absorbed oxygen and Schottky junctions between the porous single crystal In2O3 beads and the Au electrode of the sensor. The strategy for combining the unique In2O3 beads@TiO2-In2O3 nanofibers structure which possessed superior conductivity and sufficient electrons with the addition of TiO2 offered an innovation to enhance the gas sensing performance.
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Affiliation(s)
- Linlin Wang
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Jun Gao
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Baofeng Wu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Kan Kan
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Shuang Xu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Yu Xie
- Department of Materials Chemistry, Nanchang Hangkong University , Nanchang 330063, People's Republic of China
| | - Li Li
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University , Harbin 150080, People's Republic of China
- Key Laboratory of Chemical Engineering Process & Technology for High-Efficiency Conversion, Heilongjiang University , Harbin 150080, People's Republic of China
| | - Keying Shi
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Material Science, Heilongjiang University , Harbin 150080, People's Republic of China
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186
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Correlation investigation on the visible-light-driven photocatalytic activity and coordination structure of rutile Sn-Fe-TiO2 nanocrystallites for methylene blue degradation. Catal Today 2015. [DOI: 10.1016/j.cattod.2015.03.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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187
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Bezares I, del Campo A, Herrasti P, Muñoz-Bonilla A. A simple aqueous electrochemical method to synthesize TiO₂ nanoparticles. Phys Chem Chem Phys 2015; 17:29319-26. [PMID: 26469391 DOI: 10.1039/c5cp05525c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here, a simple and rapid electrochemical approach to synthesize TiO2 nanoparticles in aqueous solution is reported. This method consists in the electro-oxidation of titanium foil in a tetrabutylammonium bromide aqueous solution, which acts as both an electrolyte and a surfactant. Amorphous TiO2 particles in the nanoscale (∼5 nm), well dispersed in aqueous solution, were directly formed by applying low current densities in a short reaction time. It was demonstrated that several experimental parameters influence the reaction yield; an increase in the current, temperature and reaction time augments the quantity of the obtained material. Then, the amorphous nanoparticles were completely crystallized into a pure anatase phase by thermal treatment under an air atmosphere as analyzed by X-ray diffraction and Raman spectroscopy. Besides, the size of the nanoparticles increased to approximately 12 nm in the calcination process. The band gap energies of the resulting TiO2 anatase nanoparticles were determined by diffuse reflectance measurements according to the Kubelka Munk theory, revealing low values between 2.95 and 3.10 eV. Therefore, the results indicate the success of this method to create TiO2 nanoparticles in aqueous medium with good optical properties.
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Affiliation(s)
- Ivan Bezares
- Departamento de Química Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente, 7, Cantoblanco, 28049 Madrid, Spain.
| | - Adolfo del Campo
- Electroceramic Department, Instituto de Cerámica y Vidrio, CSIC, Kelsen 5, Madrid 28049, Spain
| | - Pilar Herrasti
- Departamento de Química Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente, 7, Cantoblanco, 28049 Madrid, Spain.
| | - Alexandra Muñoz-Bonilla
- Departamento de Química Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente, 7, Cantoblanco, 28049 Madrid, Spain.
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188
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Wang F, Ho JH, Jiang Y, Amal R. Tuning Phase Composition of TiO2 by Sn(4+) Doping for Efficient Photocatalytic Hydrogen Generation. ACS APPLIED MATERIALS & INTERFACES 2015; 7:23941-8. [PMID: 26444102 DOI: 10.1021/acsami.5b06287] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The anatase-rutile mixed-phase photocatalysts have attracted extensive research interest because of the superior activity compared to their single phase counterparts. In this study, doping of Sn(4+) ions into the lattice of TiO2 facilitates the phase transformation from anatase to rutile at a lower temperature while maintaining the same crystal sizes compared to the conventional annealling approach. The mass ratios between anatase and rutile phases can be easily manipulated by varying the Sn-dopant content. Characterization results reveal that the Sn(4+) ions entered into the lattice of TiO2 by substituting some of the Ti(4+) ions and distributed evenly in the matrix of TiO2. The substitution induced the distortion of the lattice structure, which realized the phase transformation from anatase to rutile at a lower temperature and the close-contact phase junctions were consequently formed between anatase and rutile, accounting for the efficient charge separations. The mixed-phase catalysts prepared by doping Sn(4+) ions into the TiO2 exhibit superior activity for photocatalytic hydrogen generation in the presence of Au nanoparticles, relatively to their counterparts prepared by the conventional annealling at higher temperatures. The band allignment between anatase and rutile phases is established based on the valence band X-ray photoelectron spectra and diffuse reflectance spectra to understand the spatial charge separation process at the heterojunction between the two phases. The study provides a new route for the synthesis of mixed-phase TiO2 catalysts for photocatalytic applications and advances the understanding on the enhanced photocatalytic properties of anatase-rutile mixtures.
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Affiliation(s)
- Fenglong Wang
- School of Chemical Engineering, UNSW Australia , Sydney, New South Wales 2052, Australia
| | - Jie Hui Ho
- School of Chemical Engineering, UNSW Australia , Sydney, New South Wales 2052, Australia
| | - Yijiao Jiang
- Department of Engineering, Macquarie University , Sydney, New South Wales 2109, Australia
| | - Rose Amal
- School of Chemical Engineering, UNSW Australia , Sydney, New South Wales 2052, Australia
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189
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Dai W, Yan J, Dai K, Li L, Guan N. Ultrafine metal nanoparticles loaded on TiO2 nanorods: Synthesis strategy and photocatalytic activity. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(15)60954-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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190
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Han GS, Chung HS, Kim DH, Kim BJ, Lee JW, Park NG, Cho IS, Lee JK, Lee S, Jung HS. Epitaxial 1D electron transport layers for high-performance perovskite solar cells. NANOSCALE 2015; 7:15284-15290. [PMID: 26324759 DOI: 10.1039/c5nr03476k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We demonstrate high-performance perovskite solar cells with excellent electron transport properties using a one-dimensional (1D) electron transport layer (ETL). The 1D array-based ETL is comprised of 1D SnO2 nanowires (NWs) array grown on a F:SnO2 transparent conducting oxide substrate and rutile TiO2 nanoshells epitaxially grown on the surface of the 1D SnO2 NWs. The optimized devices show more than 95% internal quantum yield at 750 nm, and a power conversion efficiency (PCE) of 14.2%. The high quantum yield is attributed to dramatically enhanced electron transport in the epitaxial TiO2 layer, compared to that in conventional nanoparticle-based mesoporous TiO2 (mp-TiO2) layers. In addition, the open space in the 1D array-based ETL increases the prevalence of uniform TiO2/perovskite junctions, leading to reproducible device performance with a high fill factor. This work offers a method to achieve reproducible, high-efficiency perovskite solar cells with high-speed electron transport.
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Affiliation(s)
- Gill Sang Han
- School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.
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191
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Dong W, Reichenberger S, Chu S, Weide P, Ruland H, Barcikowski S, Wagener P, Muhler M. The effect of the Au loading on the liquid-phase aerobic oxidation of ethanol over Au/TiO2 catalysts prepared by pulsed laser ablation. J Catal 2015. [DOI: 10.1016/j.jcat.2015.07.033] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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192
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Cheng K, Sun Y, Wan H, Wang X, Weng W, Lin J, Wang H. Improved light-induced cell detachment on rutile TiO₂ nanodot films. Acta Biomater 2015; 26:347-54. [PMID: 26297887 DOI: 10.1016/j.actbio.2015.08.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 07/24/2015] [Accepted: 08/18/2015] [Indexed: 10/23/2022]
Abstract
Anatase TiO2 nanodot films have been found to be able to release cells under light illumination with excellent efficiency and safety. In the present study, we investigated the effects of rutile contents in TiO2 nanodot films on such light induced cell detachment behavior. The results showed that TiO2 nanodot films with different contents of rutile phase have been prepared successfully. The content of rutile phase increased with the increase in calcination temperature. All films possessed good cell adhesion but there was a decrease in cell proliferation with the increasing content of rutile phase. Single cell detachment assay showed that the films with high rutile contents (calcined at 900°C and 1100°C) showed better cell detachment performance. That was ascribed to the changes of the secondary structure of extracellular proteins adsorbed on the nanodot surface after ultraviolet (365 nm, UV365) illumination. In addition, cell sheets detached through UV365 illumination maintained high activity and could be further used in tissue engineering. The present work showed that the existence of rutile phase is helpful in cell detachment behavior and it could be utilized to optimize light-induced cell detachment behavior. STATEMENT OF SIGNIFICANCE This work discovers that the presence of rutile phase in TiO2 nanodot films could improve the light-induced cell detachment behavior, although rutile phase is inferior to anatase phase on light induced superhydrophilicity. That strongly supported that the behaviors of adsorbed proteins are crucial in acquiring cell sheet with light illumination. In fact, the state and behavior of adsorbed protein greatly affect the interaction between biomaterials and living cells. Therefore, we consider this work is not only important in harvesting cells or cell sheets through light illumination, but also helpful in further understanding of interaction between biomaterials and cells.
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193
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Lee J, Burt SP, Carrero CA, Alba-Rubio AC, Ro I, O’Neill BJ, Kim HJ, Jackson DH, Kuech TF, Hermans I, Dumesic JA, Huber GW. Stabilizing cobalt catalysts for aqueous-phase reactions by strong metal-support interaction. J Catal 2015. [DOI: 10.1016/j.jcat.2015.07.003] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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194
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Litke A, Hofmann JP, Weber T, Hensen EJM. On the Formation of Cd–Zn Sulfide Photocatalysts from Insoluble Hydroxide Precursors. Inorg Chem 2015; 54:9491-8. [DOI: 10.1021/acs.inorgchem.5b01396] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anton Litke
- Inorganic Materials Chemistry Group, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Jan P. Hofmann
- Inorganic Materials Chemistry Group, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Thomas Weber
- Inorganic Materials Chemistry Group, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
| | - Emiel J. M. Hensen
- Inorganic Materials Chemistry Group, Department of Chemical Engineering
and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
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195
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Abbasi H, Antunes M, Velasco JI. Influence of polyamide–imide concentration on the cellular structure and thermo-mechanical properties of polyetherimide/polyamide–imide blend foams. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.06.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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196
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Li L, Feng X, Nie Y, Chen S, Shi F, Xiong K, Ding W, Qi X, Hu J, Wei Z, Wan LJ, Xia M. Insight into the Effect of Oxygen Vacancy Concentration on the Catalytic Performance of MnO2. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00320] [Citation(s) in RCA: 189] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li Li
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Xianghong Feng
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Yao Nie
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Siguo Chen
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Feng Shi
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Kun Xiong
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Wei Ding
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Xueqiang Qi
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Jinsong Hu
- Key
Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy
of Sciences, Beijing 100190, China
| | - Zidong Wei
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Li-Jun Wan
- Key
Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy
of Sciences, Beijing 100190, China
| | - Meirong Xia
- State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
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197
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Kar P, Zhang Y, Farsinezhad S, Mohammadpour A, Wiltshire BD, Sharma H, Shankar K. Rutile phase n- and p-type anodic titania nanotube arrays with square-shaped pore morphologies. Chem Commun (Camb) 2015; 51:7816-9. [PMID: 25853588 DOI: 10.1039/c5cc01829c] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Rutile-phase TiO2 nanotube arrays without broken walls were formed by annealing of anodically formed nanotubes in a propane flame at 650 °C and in air at 750 °C. An unusual morphological transformation was observed from the ellipsoidal pore-shapes of titania nanotubes grown in aqueous electrolyte to a square-shaped pore structure subsequent to the anneals. 750 °C annealed nanotubes were found to be lightly p-type, rare in TiO2.
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Affiliation(s)
- Piyush Kar
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G2 V4, Canada.
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198
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Sun H, Mowbray DJ, Migani A, Zhao J, Petek H, Rubio A. Comparing Quasiparticle H2O Level Alignment on Anatase and Rutile TiO2. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00529] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Huijuan Sun
- Nano-Bio
Spectroscopy Group and ETSF Scientific Development Center, Departamento
de Física de Materiales, Centro de Física de Materiales
CSIC-UPV/EHU-MPC and DIPC, Universidad del País Vasco UPV/EHU, E-20018 San Sebastián, Spain
| | - Duncan J. Mowbray
- Nano-Bio
Spectroscopy Group and ETSF Scientific Development Center, Departamento
de Física de Materiales, Centro de Física de Materiales
CSIC-UPV/EHU-MPC and DIPC, Universidad del País Vasco UPV/EHU, E-20018 San Sebastián, Spain
| | - Annapaola Migani
- ICN2−Institut Català de Nanociència i Nanotecnologia, ICN2 Building, Campus UAB, E-08193 Bellaterra (Barcelona), Spain
- CSIC−Consejo Superior de Investigaciones Científicas, ICN2 Building, Campus UAB, E-08193 Bellaterra (Barcelona), Spain
| | | | - Hrvoje Petek
- Department
of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Angel Rubio
- Nano-Bio
Spectroscopy Group and ETSF Scientific Development Center, Departamento
de Física de Materiales, Centro de Física de Materiales
CSIC-UPV/EHU-MPC and DIPC, Universidad del País Vasco UPV/EHU, E-20018 San Sebastián, Spain
- Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, D-22761 Hamburg, Germany
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199
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Peng L, Zhang H, Bai Y, Zhang Y, Wang Y. A self-supported peapod-like mesoporous TiO2-C array with excellent anode performance in lithium-ion batteries. NANOSCALE 2015; 7:8758-8765. [PMID: 25905728 DOI: 10.1039/c5nr01689d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Herein, we introduce a novel peapod-like architectural array with TiO2 nanoparticles encapsulated in graphitized carbon fibers for the first time. The unique peapod-like TiO2 arrays with high conductivity architectures are designed and fabricated for application in Li-ion batteries. Since the as-synthesized TiO2 peapod array is characterized with the large surface area derived from the mesoporous carbon fiber, as well as the high conductivity further enhanced by a thin carbon coating layer, it has shown superior rate capability, high specific capacitances, and excellent cycling stability, e.g. the specific capacity can reach up to 162 mA h g(-1) over 200 cycles. A rational and universal approach to fabricate a high-performance TiO2 peapod array for constructing next-generation Li-ion batteries is demonstrated in this paper. Furthermore, due to the specificity of the structure and the versatility of TiO2, the nanocomposite can also be applied in photochemical catalysis, electronics, biomedicine, gas sensing and so on.
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Affiliation(s)
- Liang Peng
- The State Key Laboratory of Mechanical Transmissions and the School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, P.R. China.
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200
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Sung S, Park S, Lee WJ, Son J, Kim CH, Kim Y, Noh DY, Yoon MH. Low-voltage flexible organic electronics based on high-performance sol-gel titanium dioxide dielectric. ACS APPLIED MATERIALS & INTERFACES 2015; 7:7456-7461. [PMID: 25751669 DOI: 10.1021/acsami.5b00281] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this letter, we report that high-performance insulating films can be generated by judicious control over the microstructure of sol-gel-processed titanium dioxide (TiO2) films, typically known as wide-bandgap semiconductors. The resultant device made of 23 nm-thick TiO2 dielectric layer exhibits a low leakage current density of ∼1 × 10(-7) A cm(-2) at 2 V and a large areal capacitance of 560 nF cm(-2) with the corresponding dielectric constant of 27. Finally, low-voltage flexible organic thin-film transistors were successfully demonstrated by incorporating this versatile solution-processed oxide dielectric material into pentacene transistors on polyimide substrates.
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Affiliation(s)
- Sujin Sung
- †School of Materials Science and Engineering and ‡Research Institute for Solar and Sustainable Energies, §Department of Physics and Photon Science, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, Republic of Korea
| | - Sungjun Park
- †School of Materials Science and Engineering and ‡Research Institute for Solar and Sustainable Energies, §Department of Physics and Photon Science, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, Republic of Korea
| | - Won-June Lee
- †School of Materials Science and Engineering and ‡Research Institute for Solar and Sustainable Energies, §Department of Physics and Photon Science, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, Republic of Korea
| | - Jongho Son
- †School of Materials Science and Engineering and ‡Research Institute for Solar and Sustainable Energies, §Department of Physics and Photon Science, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, Republic of Korea
| | - Chang-Hyun Kim
- †School of Materials Science and Engineering and ‡Research Institute for Solar and Sustainable Energies, §Department of Physics and Photon Science, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, Republic of Korea
| | - Yoonhee Kim
- †School of Materials Science and Engineering and ‡Research Institute for Solar and Sustainable Energies, §Department of Physics and Photon Science, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, Republic of Korea
| | - Do Young Noh
- †School of Materials Science and Engineering and ‡Research Institute for Solar and Sustainable Energies, §Department of Physics and Photon Science, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, Republic of Korea
| | - Myung-Han Yoon
- †School of Materials Science and Engineering and ‡Research Institute for Solar and Sustainable Energies, §Department of Physics and Photon Science, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, Republic of Korea
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