51
|
Wang X, Wang X, Song J, Li Y, Wang Z, Gao Y. A highly efficient TiOX (X = N and P) photocatalyst for inactivation of Microcystis aeruginosa under visible light irradiation. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.04.034] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
52
|
Li H, Shang H, Li Y, Cao X, Yang Z, Ai Z, Zhang L. Interfacial Charging-Decharging Strategy for Efficient and Selective Aerobic NO Oxidation on Oxygen Vacancy. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:6964-6971. [PMID: 31084027 DOI: 10.1021/acs.est.9b01287] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Intelligent defect engineering to harness surface molecular processes is at the core of selective oxidation catalysis. Here, we demonstrate that the two-electron-trapped oxygen vacancy (VO) of BiOCl, a prototypical F center (VŐ''), is a superb site to confine O2 toward efficient and selective NO oxidation to nitrate. Stimulated by solar light, VŐ'' accomplishes NO oxidation through a two-electron charging (VŐ'' + O2 → VŐ''-O22-) and subsequent one-electron decharging process (VŐ''-O22- + NO → VO-NO3- + e-). The back-donated electron is retrapped by VO to produce a new single-electron-trapped VO (VO'), simultaneously triggering a second round of NO oxidation (VO'-O2 + NO → VO-NO3-). This unprecedented interfacial charging-decharging scheme alters the peroxide-associated NO oxidation selectivity from NO2 to NO3- with a high efficiency and thus hold great promise for the treatment of risky NO x species in indoor air.
Collapse
Affiliation(s)
- Hao Li
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Huan Shang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Yuhan Li
- Chongqing Key Laboratory of Catalysis and New Environmental Materials, Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, College of Environment and Resources , Chongqing Technology and Business University , Chongqing 400067 , China
| | - Xuemei Cao
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Zhiping Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Zhihui Ai
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| | - Lizhi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Applied & Environmental Chemistry, College of Chemistry , Central China Normal University , Wuhan 430079 , P. R. China
| |
Collapse
|
53
|
A Mild in-Situ Method to Construct Fe-Doped Cauliflower-Like Rutile TiO2 Photocatalysts for Degradation of Organic Dye in Wastewater. Catalysts 2019. [DOI: 10.3390/catal9050426] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A mild in situ method was developed to construct an iron doped rutile TiO2 photocatalyst like cauliflower for degradation synthetic textile dye-methyl orange. The synthesized photocatalysts presented distinguished photocatalytic activity. At the optimal Fe concentration (0.5%), the decomposition rate of methyl orange (MO) was about 90% under 40 min of ultraviolet (UV) light irradiation. Whereas, to our knowledge, only 70% of the decomposition rate of MO was achieved by commercial photocatalyst P25 under the similar reaction condition. Additionally, the rutile preparation temperature did not exceed 100 °C, which was much lower than the traditional preparation calcination temperature (e.g., 600 °C). The specific surface area of Fe doped catalysts was bigger than that of the control sample and the catalyst characterization indicated that the doped iron was incorporated into the rutile TiO2 lattice and resulted in the lattice disorder. The lattice disorder would have generated surface defects in the crystal structure, which was in favor of the photocatalytic reaction. The UV-Vis diffuse refection characterization and Density Functional Theory (DFT) calculation suggested that doping a small amount of Fe into the lattice of rutile would lead to a narrower band gap and the formation of a doping energy level between conduction and valence bands of TiO2. This further increased the degradation efficiency of synthetic textile dyes in wastewaters. Our study has provided a relatively easy operation for synthesis Fe doped rutile TiO2, which is a benefit to decrease the cost in wastewater treatment process.
Collapse
|
54
|
Hu J, Chen D, Mo Z, Li N, Xu Q, Li H, He J, Xu H, Lu J. Z-Scheme 2D/2D Heterojunction of Black Phosphorus/Monolayer Bi2
WO6
Nanosheets with Enhanced Photocatalytic Activities. Angew Chem Int Ed Engl 2019; 58:2073-2077. [DOI: 10.1002/anie.201813417] [Citation(s) in RCA: 283] [Impact Index Per Article: 56.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 12/20/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Jundie Hu
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Dongyun Chen
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Zhao Mo
- Institute for Energy Research; Jiangsu University; Zhenjiang 212013 P. R. China
| | - Najun Li
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Qingfeng Xu
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Hua Li
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Jinghui He
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Hui Xu
- Institute for Energy Research; Jiangsu University; Zhenjiang 212013 P. R. China
| | - Jianmei Lu
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| |
Collapse
|
55
|
Hu J, Chen D, Mo Z, Li N, Xu Q, Li H, He J, Xu H, Lu J. Z-Scheme 2D/2D Heterojunction of Black Phosphorus/Monolayer Bi2
WO6
Nanosheets with Enhanced Photocatalytic Activities. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813417] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Jundie Hu
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Dongyun Chen
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Zhao Mo
- Institute for Energy Research; Jiangsu University; Zhenjiang 212013 P. R. China
| | - Najun Li
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Qingfeng Xu
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Hua Li
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Jinghui He
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| | - Hui Xu
- Institute for Energy Research; Jiangsu University; Zhenjiang 212013 P. R. China
| | - Jianmei Lu
- College of Chemistry; Chemical Engineering and Materials Science Collaborative Innovation Center of Suzhou Nano Science and Technology; Soochow University; Suzhou 215123 P. R. China
| |
Collapse
|
56
|
Wu H, Li X, Cheng Y, Xiao Y, Wu Q, Lin H, Xu J, Wang Y. The synergistic role of double vacancies within AgGaS2 nanocrystals in carrier separation and transfer for efficient photocatalytic hydrogen evolution. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01488h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The double vacancies synergistically contribute to photocatalytic activity by affecting the separation and transfer efficiency of photo-generated carriers.
Collapse
Affiliation(s)
- Hanying Wu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures
- and Fujian Key Laboratory of Nanomaterials
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Xiao Li
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures
- and Fujian Key Laboratory of Nanomaterials
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Yao Cheng
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures
- and Fujian Key Laboratory of Nanomaterials
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Yihong Xiao
- University of Chinese Academy of Sciences
- Beijing
- P. R. China
- State Key Laboratory of Structural Chemistry
- Fuzhou
| | - Qingping Wu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures
- and Fujian Key Laboratory of Nanomaterials
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Hang Lin
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures
- and Fujian Key Laboratory of Nanomaterials
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Ju Xu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures
- and Fujian Key Laboratory of Nanomaterials
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
- Fuzhou
- P. R. China
| | - Yuansheng Wang
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures
- and Fujian Key Laboratory of Nanomaterials
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences
- Fuzhou
- P. R. China
| |
Collapse
|
57
|
Chen S, Wang H, Shi M, Ye H, Wu Z. Deep Oxidation of NO by a Hybrid System of Plasma-N-Type Semiconductors: High-Energy Electron-Activated "Pseudo Photocatalysis" Behavior. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:8568-8577. [PMID: 29969895 DOI: 10.1021/acs.est.8b00655] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A "pseudo photocatalysis" process, being initiated between plasma and N-type semiconductors in the absence of light, was investigated for NO removal for the first time via dynamic probing of reaction processes by FT-IR spectra. It was demonstrated that N-type semiconductor catalysts could be activated to produce electron-hole (e--h+) pairs by the collision of high-energy electrons (e*) from plasma. Due to the synergy of plasma and N-type semiconductors, major changes were noted in the conversion pathways and products. NO can be directly converted to NO2- and NO3- instead of toxic NO2, owing to the formation of O2- and ·OH present in catalysts. New species like O3 or ·O may be generated from the interaction between catalyst-induced species and radicals in plasma at a higher SIE, leading to deep oxidation of existing NO2 to N2O5. Experiments with added trapping agents confirmed the contribution of e- and h+ from catalysts. A series of possible reactions were proposed to describe reaction pathways and the mechanism of this synergistic effect. We established a novel system and realized an e*-activated "pseudo photocatalysis" behavior, facilitating the deep degradation of NO. We expect that this new strategy would provide a new idea for in-depth analysis of plasma-activated catalysis phenomenon.
Collapse
Affiliation(s)
- Si Chen
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resources Science , Zhejiang University , Hangzhou 310058 , P.R. China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control, Hangzhou 310027 , P.R. China
| | - Haiqiang Wang
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resources Science , Zhejiang University , Hangzhou 310058 , P.R. China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control, Hangzhou 310027 , P.R. China
| | - Mengpa Shi
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resources Science , Zhejiang University , Hangzhou 310058 , P.R. China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control, Hangzhou 310027 , P.R. China
| | - Haoling Ye
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resources Science , Zhejiang University , Hangzhou 310058 , P.R. China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control, Hangzhou 310027 , P.R. China
| | - Zhongbiao Wu
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental & Resources Science , Zhejiang University , Hangzhou 310058 , P.R. China
- Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control, Hangzhou 310027 , P.R. China
| |
Collapse
|
58
|
Li R. Photocatalytic nitrogen fixation: An attractive approach for artificial photocatalysis. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(18)63104-3] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
59
|
Yang J, Guo Y, Jiang R, Qin F, Zhang H, Lu W, Wang J, Yu JC. High-Efficiency "Working-in-Tandem" Nitrogen Photofixation Achieved by Assembling Plasmonic Gold Nanocrystals on Ultrathin Titania Nanosheets. J Am Chem Soc 2018; 140:8497-8508. [PMID: 29905477 DOI: 10.1021/jacs.8b03537] [Citation(s) in RCA: 177] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The fixation of atmospheric N2 to NH3 is an essential process for sustaining life. One grand challenge is to develop efficient catalysts to photofix N2 under ambient conditions. Herein we report an all-inorganic catalyst, Au nanocrystals anchored on ultrathin TiO2 nanosheets with oxygen vacancies. It can accomplish photodriven N2 fixation in the "working-in-tandem" pathway at room temperature and atmospheric pressure. The oxygen vacancies on the TiO2 nanosheets chemisorb and activate N2 molecules, which are subsequently reduced to NH3 by hot electrons generated from plasmon excitation of the Au nanocrystals. The apparent quantum efficiency of 0.82% at 550 nm for the conversion of incident photons to NH3 is higher than those reported so far. Optimizing the absorption across the overall visible range with the mixture of Au nanospheres and nanorods further enhances the N2 photofixation rate by 66.2% in comparison with Au nanospheres used alone. This work offers a new approach for the rational design of efficient catalysts toward sustainable N2 fixation through a less energy-demanding photochemical process compared to the industrial Haber-Bosch process.
Collapse
Affiliation(s)
- Jianhua Yang
- Department of Physics , The Chinese University of Hong Kong , Shatin 852 , Hong Kong SAR , China
| | - Yanzhen Guo
- Department of Physics , The Chinese University of Hong Kong , Shatin 852 , Hong Kong SAR , China
| | - Ruibin Jiang
- Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering , Shaanxi Normal University , Xi'an 710119 , China
| | - Feng Qin
- Department of Physics , The Chinese University of Hong Kong , Shatin 852 , Hong Kong SAR , China
| | - Han Zhang
- Department of Physics , The Chinese University of Hong Kong , Shatin 852 , Hong Kong SAR , China
| | - Wenzheng Lu
- Department of Physics , The Chinese University of Hong Kong , Shatin 852 , Hong Kong SAR , China
| | - Jianfang Wang
- Department of Physics , The Chinese University of Hong Kong , Shatin 852 , Hong Kong SAR , China
| | - Jimmy C Yu
- Department of Chemistry , The Chinese University of Hong Kong , Shatin 852 , Hong Kong SAR , China
| |
Collapse
|
60
|
Ryan PTP, Jakub Z, Balajka J, Hulva J, Meier M, Küchle JT, Blowey PJ, Thakur PK, Franchini C, Payne DJ, Woodruff DP, Rochford LA, Allegretti F, Lee TL, Parkinson GS, Duncan DA. Direct measurement of Ni incorporation into Fe 3O 4(001). Phys Chem Chem Phys 2018; 20:16469-16476. [PMID: 29882949 PMCID: PMC6011209 DOI: 10.1039/c8cp02516a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The normal incidence X-ray standing wave (NIXSW) technique has been used to follow the evolution of the adsorption geometry of Ni adatoms on the Fe3O4(001)-(√2 × √2)R45° surface as a function of temperature.
The normal incidence X-ray standing wave (NIXSW) technique has been used to follow the evolution of the adsorption geometry of Ni adatoms on the Fe3O4(001)-(√2 × √2)R45° surface as a function of temperature. Two primary surface region sites are identified: a bulk-continuation tetrahedral site and a sub-surface octahedral site, the latter site being preferred at higher annealing temperatures. The ease of incorporation is linked to the presence of subsurface cation vacancies in the (√2 × √2)R45° reconstruction and is consistent with the preference for octahedral coordination observed in the spinel compound NiFe2O4.
Collapse
Affiliation(s)
- P T P Ryan
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, OX11 0DE, UK.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
61
|
Zhang Y, Chen Z, Lu Z. A Facile Method for the Preparation of Colored Bi₄Ti₃O 12-x Nanosheets with Enhanced Visible-Light Photocatalytic Hydrogen Evolution Activity. NANOMATERIALS 2018; 8:nano8040261. [PMID: 29690518 PMCID: PMC5923591 DOI: 10.3390/nano8040261] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 04/12/2018] [Accepted: 04/16/2018] [Indexed: 11/20/2022]
Abstract
Bi4Ti3O12−x nanosheet photocatalysts with abundant oxygen vacancies are fabricated by a facile solid-state chemical reduction method for the first time. This method is simple in operation, has short reaction time, and can be conducted at mild temperatures (300~400 °C). The electron paramagnetic resonance, thermogravimetric analysis, X-ray photoelectron spectrometer, and positron annihilation lifetime spectra results indicate that oxygen vacancies are produced in Bi4Ti3O12−x, and they can be adjusted by tuning the reduction reaction conditions. Control experiments show that the reduction time and temperature have great influences on the photocatalytic activities of Bi4Ti3O12−x. The optimal Bi4Ti3O12−x is the sample undergoing the reduction treatment at 350 °C for 60 min and it affords a hydrogen evolution rate of 129 μmol·g−1·h−1 under visible-light irradiation, which is about 3.4 times that of the pristine Bi4Ti3O12. The Bi4Ti3O12−x photocatalysts have good reusability and storage stability and can be used to decompose formaldehyde and formic acid for hydrogen production. The surface oxygen vacancies states result in the broadening of the valence band and the narrowing of the band gap. Such energy level structure variation helps promote the separation of photo-generated electron-hole pairs thus leading to enhancement in the visible-light photocatalytic hydrogen evolution. Meanwhile, the narrowing of the band gap leads to a broader visible light absorption of Bi4Ti3O12−x.
Collapse
Affiliation(s)
- Yizeng Zhang
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Zhiwu Chen
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Zhenya Lu
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China.
| |
Collapse
|
62
|
Fabrication of a Z-Scheme g-C3N4/Fe-TiO2 Photocatalytic Composite with Enhanced Photocatalytic Activity under Visible Light Irradiation. Catalysts 2018. [DOI: 10.3390/catal8030112] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
63
|
Li Q, Gao S, Hu J, Wang H, Wu Z. Superior NOx photocatalytic removal over hybrid hierarchical Bi/BiOI with high non-NO2 selectivity: synergistic effect of oxygen vacancies and bismuth nanoparticles. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01466c] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oxygen vacancies and bismuth nanoparticles over Bi/BiOI simultaneously contribute to the deep oxidation of NOx and remarkable non-NO2 selectivity.
Collapse
Affiliation(s)
- Qian Li
- Key Laboratory of Environment Remediation and Ecological Health
- Ministry of Education
- College of Environmental & Resources Science
- Hangzhou 310058
- P.R. China
| | - Shan Gao
- Key Laboratory of Environment Remediation and Ecological Health
- Ministry of Education
- College of Environmental & Resources Science
- Hangzhou 310058
- P.R. China
| | - Jing Hu
- Key Laboratory of Environment Remediation and Ecological Health
- Ministry of Education
- College of Environmental & Resources Science
- Hangzhou 310058
- P.R. China
| | - Haiqiang Wang
- Key Laboratory of Environment Remediation and Ecological Health
- Ministry of Education
- College of Environmental & Resources Science
- Hangzhou 310058
- P.R. China
| | - Zhongbiao Wu
- Key Laboratory of Environment Remediation and Ecological Health
- Ministry of Education
- College of Environmental & Resources Science
- Hangzhou 310058
- P.R. China
| |
Collapse
|
64
|
Tan S, Li D. Enhancing Oxygen Storage Capability and Catalytic Activity of Lanthanum Oxysulfide (La2
O2
S) Nanocatalysts by Sodium and Iron/Sodium Doping. ChemCatChem 2017. [DOI: 10.1002/cctc.201701117] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shuai Tan
- Department of Chemical Engineering; University of Wyoming; 1000 E, University Ave Laramie WY 82071 USA
| | - Dongmei Li
- Department of Chemical Engineering; University of Wyoming; 1000 E, University Ave Laramie WY 82071 USA
| |
Collapse
|
65
|
Removal of NOX Using Hydrogen Peroxide Vapor over Fe/TiO2 Catalysts and an Absorption Technique. Catalysts 2017. [DOI: 10.3390/catal7120386] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|
66
|
Hydrothermal synthesized novel nanoporous g-C3N4/MnTiO3 heterojunction with direct Z-scheme mechanism. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.11.151] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
67
|
Li H, Li J, Ai Z, Jia F, Zhang L. Durch Sauerstoff-Leerstellen vermittelte Photokatalyse mit BiOCl: Reaktivität, Selektivität und Ausblick. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705628] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hao Li
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry; Central China Normal University; Wuhan 430079 Volksrepublik China
| | - Jie Li
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry; Central China Normal University; Wuhan 430079 Volksrepublik China
| | - Zhihui Ai
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry; Central China Normal University; Wuhan 430079 Volksrepublik China
| | - Falong Jia
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry; Central China Normal University; Wuhan 430079 Volksrepublik China
| | - Lizhi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry; Central China Normal University; Wuhan 430079 Volksrepublik China
| |
Collapse
|
68
|
Li H, Li J, Ai Z, Jia F, Zhang L. Oxygen Vacancy-Mediated Photocatalysis of BiOCl: Reactivity, Selectivity, and Perspectives. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/anie.201705628] [Citation(s) in RCA: 649] [Impact Index Per Article: 92.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hao Li
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry; Central China Normal University; Wuhan 430079 P.R. China
| | - Jie Li
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry; Central China Normal University; Wuhan 430079 P.R. China
| | - Zhihui Ai
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry; Central China Normal University; Wuhan 430079 P.R. China
| | - Falong Jia
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry; Central China Normal University; Wuhan 430079 P.R. China
| | - Lizhi Zhang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry; Central China Normal University; Wuhan 430079 P.R. China
| |
Collapse
|
69
|
Chen Z, Song X, Zhang S, Wu B, Zhang G, Pan B. Acetylacetone as an efficient electron shuttle for concerted redox conversion of arsenite and nitrate in the opposite direction. WATER RESEARCH 2017; 124:331-340. [PMID: 28779618 DOI: 10.1016/j.watres.2017.07.071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 07/25/2017] [Accepted: 07/28/2017] [Indexed: 06/07/2023]
Abstract
The redox conversion of arsenite and nitrate has direct effects on their potential environment risks. Due to the similar reduction potentials, there are few technologies that can simultaneously oxidize arsenite and reduce nitrate in one process. Here, we demonstrate that a diketone-mediated photochemical process could efficiently do this. A combined experimental and theoretical investigation was conducted to elucidate the mechanisms behind the redox conversion in the UV/acetylacetone (AA) process. Our key finding is that UV irradiation significantly changed the redox potential of AA. The excited AA, 3(AA)*, acted as a semiquinone radical-like electron shuttle. For arsenite oxidation, the efficiency of 3(AA)* was 1-2 orders of magnitude higher than those of quinone-type electron shuttles, whereas the consumption of AA was 2-4 orders of magnitude less than those of benzonquinones. The oxidation of arsenite and reduction of nitrate could be both accelerated when they existed together in UV/AA process. The results indicate that small diketones are some neglected but potent electron shuttles of great application potential in regulating aquatic redox reactions with the combination of UV irradiation.
Collapse
Affiliation(s)
- Zhihao Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Xiaojie Song
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Shujuan Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China.
| | - Bingdang Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Guoyang Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| | - Bingcai Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, PR China
| |
Collapse
|
70
|
de Castro IA, Datta RS, Ou JZ, Castellanos-Gomez A, Sriram S, Daeneke T, Kalantar-Zadeh K. Molybdenum Oxides - From Fundamentals to Functionality. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1701619. [PMID: 28815807 DOI: 10.1002/adma.201701619] [Citation(s) in RCA: 182] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 04/27/2017] [Indexed: 05/20/2023]
Abstract
The properties and applications of molybdenum oxides are reviewed in depth. Molybdenum is found in various oxide stoichiometries, which have been employed for different high-value research and commercial applications. The great chemical and physical characteristics of molybdenum oxides make them versatile and highly tunable for incorporation in optical, electronic, catalytic, bio, and energy systems. Variations in the oxidation states allow manipulation of the crystal structure, morphology, oxygen vacancies, and dopants, to control and engineer electronic states. Despite this overwhelming functionality and potential, a definitive resource on molybdenum oxide is still unavailable. The aim here is to provide such a resource, while presenting an insightful outlook into future prospective applications for molybdenum oxides.
Collapse
Affiliation(s)
| | | | - Jian Zhen Ou
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | | | - Sharath Sriram
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | - Torben Daeneke
- School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | | |
Collapse
|
71
|
Pan X, Gao X, Chen X, Lee HN, Liu Y, Withers RL, Yi Z. Design Synthesis of Nitrogen-Doped TiO2@Carbon Nanosheets toward Selective Nitroaromatics Reduction under Mild Conditions. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02322] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaoyang Pan
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures & Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Xiang Gao
- Materials
Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Xuxing Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures & Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Ho Nyung Lee
- Materials
Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Yun Liu
- Research
School of Chemistry, The Australian National University, Australian Capital
Territory 2601, Australia
| | - Ray L. Withers
- Research
School of Chemistry, The Australian National University, Australian Capital
Territory 2601, Australia
| | - Zhiguo Yi
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures & Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
72
|
Hao YJ, Liu B, Tian LG, Li FT, Ren J, Liu SJ, Liu Y, Zhao J, Wang XJ. Synthesis of {111} Facet-Exposed MgO with Surface Oxygen Vacancies for Reactive Oxygen Species Generation in the Dark. ACS APPLIED MATERIALS & INTERFACES 2017; 9:12687-12693. [PMID: 28339179 DOI: 10.1021/acsami.6b16856] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Seeking a simple and moderate route to generate reactive oxygen species (ROS) for antibiosis is of great interest and challenge. This work demonstrates that molecule transition and electron rearrangement processes can directly occur only through chemisorption interaction between the adsorbed O2 and high-energy {111} facet-exposed MgO with abundant surface oxygen vacancies (SOVs), hence producing singlet oxygen and superoxide anion radicals without light irradiation. These ROS were confirmed by electron paramagnetic resonance, in situ Raman, and scavenger experiments. Furthermore, heat plays a crucial role for the electron transfer process to accelerate the formation of ·O2-, which is verified by temperature kinetic experiments of nitro blue tetrazolium reduction in the dark. Therefore, the presence of oxygen vacancy can be considered as an intensification of the activation process. The designed MgO is acquired in one step via constructing a reduction atmosphere during the combustion reaction process, which has an ability similar to that of noble metal Pd to activate molecular oxygen and can be used as an effective bacteriocide in the dark.
Collapse
Affiliation(s)
- Ying-Juan Hao
- College of Science, Hebei University of Science and Technology , Shijiazhuang 050018, China
| | - Bing Liu
- School of Chemical and Material Engineering, Jiangnan University , Wuxi 214122, China
| | - Li-Gang Tian
- College of Science, Hebei University of Science and Technology , Shijiazhuang 050018, China
| | - Fa-Tang Li
- College of Science, Hebei University of Science and Technology , Shijiazhuang 050018, China
| | - Jie Ren
- College of Science, Hebei University of Science and Technology , Shijiazhuang 050018, China
| | - Shao-Jia Liu
- College of Science, Hebei University of Science and Technology , Shijiazhuang 050018, China
| | - Ying Liu
- College of Science, Hebei University of Science and Technology , Shijiazhuang 050018, China
| | - Jun Zhao
- College of Science, Hebei University of Science and Technology , Shijiazhuang 050018, China
| | - Xiao-Jing Wang
- College of Science, Hebei University of Science and Technology , Shijiazhuang 050018, China
| |
Collapse
|
73
|
Ren H, Koshy P, Chen WF, Qi S, Sorrell CC. Photocatalytic materials and technologies for air purification. JOURNAL OF HAZARDOUS MATERIALS 2017; 325:340-366. [PMID: 27932035 DOI: 10.1016/j.jhazmat.2016.08.072] [Citation(s) in RCA: 131] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 08/01/2016] [Accepted: 08/30/2016] [Indexed: 05/13/2023]
Abstract
Since there is increasing concern for the impact of air quality on human health, the present work surveys the materials and technologies for air purification using photocatalytic materials. The coverage includes (1) current photocatalytic materials for the decomposition of chemical contaminants and disinfection of pathogens present in air and (2) photocatalytic air purification systems that are used currently and under development. The present work focuses on five main themes. First, the mechanisms of photodegradation and photodisinfection are explained. Second, system designs for photocatalytic air purification are surveyed. Third, the photocatalytic materials used for air purification and their characteristics are considered, including both conventional and more recently developed photocatalysts. Fourth, the methods used to fabricate these materials are discussed. Fifth, the most significant coverage is devoted to materials design strategies aimed at improving the performance of photocatalysts for air purification. The review concludes with a brief consideration of promising future directions for materials research in photocatalysis.
Collapse
Affiliation(s)
- Hangjuan Ren
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia.
| | - Pramod Koshy
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Wen-Fan Chen
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Shaohua Qi
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | | |
Collapse
|
74
|
Kou J, Lu C, Wang J, Chen Y, Xu Z, Varma RS. Selectivity Enhancement in Heterogeneous Photocatalytic Transformations. Chem Rev 2017; 117:1445-1514. [DOI: 10.1021/acs.chemrev.6b00396] [Citation(s) in RCA: 511] [Impact Index Per Article: 73.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | | | - Rajender S. Varma
- Regional
Center of Advanced Technologies and Materials, Faculty of Science,
Department of Physical Chemistry, Palacky University, Šlechtitelů
11, 783 71 Olomouc, Czech Republic
| |
Collapse
|
75
|
Zhang Y, Dai R, Hu S. Study of the role of oxygen vacancies as active sites in reduced graphene oxide-modified TiO2. Phys Chem Chem Phys 2017; 19:7307-7315. [DOI: 10.1039/c7cp00630f] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A proof-of-concept study follow RGO introduced into TiO2 with oxygen vacancies, the role of oxygen vacancies as active sites in reduced graphene oxide-modified TiO2.
Collapse
Affiliation(s)
- Yanhui Zhang
- College of Chemistry and Environment
- Minnan Normal University
- Zhangzhou
- P. R. China
| | - Rongying Dai
- College of Chemistry and Environment
- Minnan Normal University
- Zhangzhou
- P. R. China
| | - Shirong Hu
- College of Chemistry and Environment
- Minnan Normal University
- Zhangzhou
- P. R. China
| |
Collapse
|
76
|
Chermahini AN, Farrokhpour H, Zeinodini A. Adsorption of some important tautomers of 5-amino tetrazole on the (001) and (101) surfaces of anatase: Theoretical study. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.05.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
77
|
Fujiwara K, Pratsinis SE. Atomically dispersed Pd on nanostructured TiO2for NO removal by solar light. AIChE J 2016. [DOI: 10.1002/aic.15495] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Kakeru Fujiwara
- Dept. of Mechanical and Process Engineering, ETH Zurich; Particle Technology Laboratory, Institute of Process Engineering; Zurich CH-8092 Switzerland
| | - Sotiris E. Pratsinis
- Dept. of Mechanical and Process Engineering, ETH Zurich; Particle Technology Laboratory, Institute of Process Engineering; Zurich CH-8092 Switzerland
| |
Collapse
|
78
|
Ren H, Koshy P, Cao F, Sorrell CC. Multivalence Charge Transfer in Doped and Codoped Photocatalytic TiO2. Inorg Chem 2016; 55:8071-81. [DOI: 10.1021/acs.inorgchem.6b01200] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Hangjuan Ren
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Pramod Koshy
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Fuyang Cao
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | | |
Collapse
|
79
|
Affiliation(s)
- Kakeru Fujiwara
- Particle
Technology Laboratory, Institute of Process Engineering, Department
of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse
3, CH-8092 Zurich, Switzerland
| | - Ulrich Müller
- Empa, Swiss
Federal Laboratories for Materials Science and
Technology, Laboratory for Nanoscale Materials Science, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Sotiris E. Pratsinis
- Particle
Technology Laboratory, Institute of Process Engineering, Department
of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse
3, CH-8092 Zurich, Switzerland
| |
Collapse
|
80
|
Zhang Q, Huang Y, Xu L, Cao JJ, Ho W, Lee SC. Visible-Light-Active Plasmonic Ag-SrTiO3 Nanocomposites for the Degradation of NO in Air with High Selectivity. ACS APPLIED MATERIALS & INTERFACES 2016; 8:4165-74. [PMID: 26796511 DOI: 10.1021/acsami.5b11887] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Harnessing inexhaustible solar energy for photocatalytic disposal of nitrogen oxides is of great significance nowadays. In this study, Ag-SrTiO3 nanocomposites (Ag-STO) were synthesized via one-pot solvothermal method for the first time. The deposition of Ag nanoparticles incurs a broad plasmonic resonance absorption in the visible light range, resulting in enhanced visible light driven activity on NO removal in comparison with pristine SrTiO3. The Ag loading amount has a significant influence on light absorption properties of Ag-STO, which further affects the photocatalytic efficiency. It was shown that 0.5% Ag loading onto SrTiO3 (in mass ratio) could remove 30% of NO in a single reaction path under visible light irradiation, which is twice higher than that achieved on pristine SrTiO3. Most importantly, the generation of harmful intermediate (NO2) is largely inhibited over SrTiO3 and Ag-STO nanocomposites, which can be ascribed to the basic surface property of strontium sites. As identified by electron spin resonance (ESR) spectra,·O2(-) and ·OH radicals are the major reactive species for NO oxidation. Essentially speaking, the abundance of reactive oxygen radicals produced over Ag-STO nanocomposites are responsible for the improved photocatalytic activity. This work provides a facile and controllable route to fabricate plasmonic Ag-SrTiO3 nanocomposite photocatalyst featuring high visible light activity and selectivity for NO abatement.
Collapse
Affiliation(s)
- Qian Zhang
- Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061, China
| | - Yu Huang
- Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061, China
- State Key Lab of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061, China
| | - Lifeng Xu
- Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061, China
| | - Jun-ji Cao
- Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061, China
- State Key Lab of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences , Xi'an 710061, China
| | - Wingkei Ho
- Department of Science and Environmental Studies, The Hong Kong Institute of Education , Hong Kong, China
| | - Shun Cheng Lee
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University , Hung Hom, Hong Kong, China
| |
Collapse
|
81
|
Li FT, Li YL, Chai MJ, Li B, Hao YJ, Wang XJ, Liu RH. One-step construction of {001} facet-exposed BiOCl hybridized with Al2O3 for enhanced molecular oxygen activation. Catal Sci Technol 2016. [DOI: 10.1039/c6cy01306f] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The conduction band position of defective Al2O3 obtained via a combustion synthesis is proposed and the in situ as-prepared heterojunctions containing Al2O3 and {001} facet-exposed BiOCl with surface oxygen vacancies exhibit excellent performance for molecular oxygen activation.
Collapse
Affiliation(s)
- Fa-tang Li
- College of Science
- Hebei University of Science and Technology
- Shijiazhuang 050021
- China
| | - Yi-lei Li
- College of Science
- Hebei University of Science and Technology
- Shijiazhuang 050021
- China
| | - Mei-juan Chai
- College of Science
- Hebei University of Science and Technology
- Shijiazhuang 050021
- China
| | - Bo Li
- Analytical and Testing Centre of Hebei Province
- Hebei University of Science and Technology
- Shijiazhuang 050021
- China
| | - Ying-juan Hao
- College of Science
- Hebei University of Science and Technology
- Shijiazhuang 050021
- China
| | - Xiao-jing Wang
- College of Science
- Hebei University of Science and Technology
- Shijiazhuang 050021
- China
| | - Rui-hong Liu
- College of Science
- Hebei University of Science and Technology
- Shijiazhuang 050021
- China
| |
Collapse
|
82
|
Tian F, Wu Z, Tong Y, Wu Z, Cravotto G. Microwave-Assisted Synthesis of Carbon-Based (N, Fe)-Codoped TiO2 for the Photocatalytic Degradation of Formaldehyde. NANOSCALE RESEARCH LETTERS 2015; 10:360. [PMID: 26377213 PMCID: PMC4573084 DOI: 10.1186/s11671-015-1061-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Accepted: 08/28/2015] [Indexed: 05/15/2023]
Abstract
A microwave-assisted sol-gel method was used to synthesize (N, Fe)-codoped activated carbon (AC)/TiO2 photocatalyst for enhanced optical absorption in the visible light region. The prepared samples were characterized via X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller analysis, ultraviolet-visible light spectroscopy, X-ray photoelectron spectroscopy, and photoluminescence spectroscopy. The results showed no significant difference in the surface area of AC/TiO2 (approximately 500 m(2)/g) after doping. TiO2 was uniformly distributed on the surface of AC, which exhibited coexisting anatase and rutile structures with a mean crystallite diameter of approximately 20 nm. N and Fe monodoping on AC/TiO2 reduced the energy band gap of TiO2 to 2.81 and 2.79 eV, respectively, which mainly attributed to the impurity energy formed in the energy gap of TiO2. In (N, Fe)-codoped AC/TiO2, N and Fe are incorporated into the TiO2 framework and narrow the band gap of TiO2 to 2.58 eV, thereby causing a large redshift. Codoping of N and Fe enhanced the production of hydroxyl radicals (⋅OH) and improved the photocatalytic activity of the resultant AC/TiO2 compared with those of undoped and N- or Fe-monodoped AC/TiO2. N-Fe-AC/TiO2 degraded 93 % of the formaldehyde under Xe-lamp irradiation. Moreover, the photocatalyst was easily recyclable. In summary, a novel and efficient method to mineralize low concentrations of HCHO in wastewater was discovered.
Collapse
Affiliation(s)
- Fei Tian
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, People's Republic of China
| | - Zhansheng Wu
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, People's Republic of China.
| | - Yanbin Tong
- School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, People's Republic of China
| | - Zhilin Wu
- Dipartimento di Scienza e Tecnologia del Farmaco, University of Turin, Turin, 10125, Italy
| | - Giancarlo Cravotto
- Dipartimento di Scienza e Tecnologia del Farmaco, University of Turin, Turin, 10125, Italy
| |
Collapse
|
83
|
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]
|
84
|
Li FT, Ran J, Jaroniec M, Qiao SZ. Solution combustion synthesis of metal oxide nanomaterials for energy storage and conversion. NANOSCALE 2015; 7:17590-610. [PMID: 26457657 DOI: 10.1039/c5nr05299h] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The design and synthesis of metal oxide nanomaterials is one of the key steps for achieving highly efficient energy conversion and storage on an industrial scale. Solution combustion synthesis (SCS) is a time- and energy-saving method as compared with other routes, especially for the preparation of complex oxides which can be easily adapted for scale-up applications. This review summarizes the synthesis of various metal oxide nanomaterials and their applications for energy conversion and storage, including lithium-ion batteries, supercapacitors, hydrogen and methane production, fuel cells and solar cells. In particular, some novel concepts such as reverse support combustion, self-combustion of ionic liquids, and creation of oxygen vacancies are presented. SCS has some unique advantages such as its capability for in situ doping of oxides and construction of heterojunctions. The well-developed porosity and large specific surface area caused by gas evolution during the combustion process endow the resulting materials with exceptional properties. The relationship between the structural properties of the metal oxides studied and their performance is discussed. Finally, the conclusions and perspectives are briefly presented.
Collapse
Affiliation(s)
- Fa-tang Li
- College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China and School of Chemical Engineering, University of Adelaide, Adelaide, SA 5005, Australia.
| | - Jingrun Ran
- School of Chemical Engineering, University of Adelaide, Adelaide, SA 5005, Australia.
| | - Mietek Jaroniec
- Department of Chemistry and Biochemistry, Kent State University, Kent, OH 44240, USA
| | - Shi Zhang Qiao
- School of Chemical Engineering, University of Adelaide, Adelaide, SA 5005, Australia.
| |
Collapse
|
85
|
Song J, Huang ZF, Pan L, Zou JJ, Zhang X, Wang L. Oxygen-Deficient Tungsten Oxide as Versatile and Efficient Hydrogenation Catalyst. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01522] [Citation(s) in RCA: 205] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiajia Song
- Key Laboratory
for Green
Chemical Technology of the Ministry of Education, School of Chemical
Engineering and Technology, Tianjin University; Collaborative Innovative Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Zhen-Feng Huang
- Key Laboratory
for Green
Chemical Technology of the Ministry of Education, School of Chemical
Engineering and Technology, Tianjin University; Collaborative Innovative Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Lun Pan
- Key Laboratory
for Green
Chemical Technology of the Ministry of Education, School of Chemical
Engineering and Technology, Tianjin University; Collaborative Innovative Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Ji-Jun Zou
- Key Laboratory
for Green
Chemical Technology of the Ministry of Education, School of Chemical
Engineering and Technology, Tianjin University; Collaborative Innovative Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Xiangwen Zhang
- Key Laboratory
for Green
Chemical Technology of the Ministry of Education, School of Chemical
Engineering and Technology, Tianjin University; Collaborative Innovative Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Li Wang
- Key Laboratory
for Green
Chemical Technology of the Ministry of Education, School of Chemical
Engineering and Technology, Tianjin University; Collaborative Innovative Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| |
Collapse
|
86
|
Zhu W, Xiao S, Zhang D, Liu P, Zhou H, Dai W, Liu F, Li H. Highly efficient and stable Au/CeO2-TiO2 photocatalyst for nitric oxide abatement: potential application in flue gas treatment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10822-10830. [PMID: 26390086 DOI: 10.1021/acs.langmuir.5b02232] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In the present work, highly efficient and stable Au/CeO2-TiO2 photocatalysts were prepared by a microwave-assisted solution approach. The Au/CeO2-TiO2 composites with optimal molar ratio of Au/Ce/Ti of 0.004:0.1:1 delivered a remarkably high and stable NO conversion rate of 85% in a continuous flow reactor system under simulated solar light irradiation, which far exceeded the rate of 48% over pure TiO2. The tiny Au nanocrystals (∼1.1 nm) were well stabilized by CeO2 via strong metal-support bonding even it was subjected to calcinations at 550 °C for 6 h. These Au nanocrystals served as the very active sites for activating the molecule of nitric oxide and reducing the transmission time of the photogenerated electrons to accelerate O2 transforming to reactive oxygen species. Moreover, the Au-Ce(3+) interface formed and served as an anchoring site of O2 molecule. Then more adsorbed oxygen could react with photogenerated electrons on TiO2 surfaces to produce more superoxide radicals for NO oxidation, resulting in the improved efficiency. Meanwhile, O2 was also captured at the Au/TiO2 perimeter site and the NO molecules on TiO2 sites were initially delivered to the active perimeter site via diffusion on the TiO2 surface, where they assisted O-O bond dissociation and reacted with oxygen at these perimeter sites. Therefore, these finite Au nanocrystals can consecutively expose active sites for oxidizing NO. These synergistic effects created an efficient and stable system for breaking down NO pollutants. Furthermore, the excellent antisintering property of the catalyst will allow them for the potential application in photocatalytic treatment of high-temperature flue gas from power plant.
Collapse
Affiliation(s)
- Wei Zhu
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Life and Environmental Science, Shanghai Normal University , Shanghai 200234, China (PRC)
| | - Shuning Xiao
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Life and Environmental Science, Shanghai Normal University , Shanghai 200234, China (PRC)
| | - Dieqing Zhang
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Life and Environmental Science, Shanghai Normal University , Shanghai 200234, China (PRC)
| | - Peijue Liu
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Life and Environmental Science, Shanghai Normal University , Shanghai 200234, China (PRC)
| | - Hongjun Zhou
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Life and Environmental Science, Shanghai Normal University , Shanghai 200234, China (PRC)
| | - Wenrui Dai
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Life and Environmental Science, Shanghai Normal University , Shanghai 200234, China (PRC)
| | - Fanfan Liu
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Life and Environmental Science, Shanghai Normal University , Shanghai 200234, China (PRC)
| | - Hexing Li
- Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of Rare Earth Functional Materials, College of Life and Environmental Science, Shanghai Normal University , Shanghai 200234, China (PRC)
| |
Collapse
|
87
|
Aditya T, Pal A, Pal T. Nitroarene reduction: a trusted model reaction to test nanoparticle catalysts. Chem Commun (Camb) 2015; 51:9410-31. [PMID: 25872865 DOI: 10.1039/c5cc01131k] [Citation(s) in RCA: 409] [Impact Index Per Article: 45.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Nitrophenol reduction to aminophenol with a reducing agent is conveniently carried out in aqueous medium mainly with a metal or metal oxide catalyst. This reduction is presently considered as a benchmark reaction to test a catalyst nanoparticle. Thousands of original reports have enriched this field of nanoparticle catalyzed reaction. Synthesis of different metal and metal oxide nanoparticles and their composites along with their role as catalysts for nitrophenol reduction with varying reducing agents have been elucidated here. The progress of the reaction is conveniently monitored by UV-visible spectrophotometry and hence it becomes a universally accepted model reaction. In this review we have discussed the reaction kinetics considering its elegance and importance enlightening the long known Langmuir-Hinshelwood mechanism and Eley-Rideal mechanism at length, along with a few other mechanisms recently reported. A brief description of the synthetic procedures of various nanoparticles and their respective catalytic behaviour towards nitroarene reduction has also been accounted here.
Collapse
Affiliation(s)
- Teresa Aditya
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.
| | | | | |
Collapse
|
88
|
Zhang L, Wang S, Lu C. Detection of Oxygen Vacancies in Oxides by Defect-Dependent Cataluminescence. Anal Chem 2015; 87:7313-20. [DOI: 10.1021/acs.analchem.5b02267] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Lijuan Zhang
- State Key Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Si Wang
- State Key Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chao Lu
- State Key Laboratory of Chemical
Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| |
Collapse
|
89
|
Yamamoto A, Mizuno Y, Teramura K, Hosokawa S, Tanaka T. Noble-Metal-Free NOx Storage over Ba-Modified TiO2 Photocatalysts under UV-Light Irradiation at Low Temperatures. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00151] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Akira Yamamoto
- Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yuto Mizuno
- Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Kentaro Teramura
- Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
- Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8520, Japan
- Precursory
Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Saburo Hosokawa
- Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
- Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8520, Japan
| | - Tsunehiro Tanaka
- Department
of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
- Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto 615-8520, Japan
- Precursory
Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| |
Collapse
|
90
|
Cvejin K, Manjakkal L, Kulawik J, Zaraska K, Szwagierczak D. Planar Impedancemetric NO Sensor with Thick Film Perovskite Electrodes Based on Samarium Cobaltite. ELECTROANAL 2015. [DOI: 10.1002/elan.201400602] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
91
|
Li FT, Wang Q, Ran J, Hao YJ, Wang XJ, Zhao D, Qiao SZ. Ionic liquid self-combustion synthesis of BiOBr/Bi24O31Br10 heterojunctions with exceptional visible-light photocatalytic performances. NANOSCALE 2015; 7:1116-1126. [PMID: 25482071 DOI: 10.1039/c4nr05451b] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Heterostructured BiOBr/Bi24O31Br10 nanocomposites with surface oxygen vacancies are constructed by a facile in situ route of one-step self-combustion of ionic liquids. The compositions can be easily controlled by simply adjusting the fuel ratio of urea and 2-bromoethylamine hydrobromide (BTH). BTH serves not only as a fuel, but also as a complexing agent for ionic liquids and a reactant to supply the Br element. The heterojunctions show remarkable adsorptive ability for both the cationic dye of rhodamine B (RhB) and the anionic dye of methylene orange (MO) at high concentrations, which is attributed to the abundant surface oxygen vacancies. The sample containing 75.2% BiOBr and 24.8% Bi24O31Br10 exhibits the highest photocatalytic activity. Its reaction rate constant is 4.0 and 9.0 times that of pure BiOBr in degrading 50 mg L(-1) of RhB and 30 mg L(-1) of MO under visible-light (λ > 400 nm) irradiation, respectively, which is attributed to the narrow band gap and highly efficient transfer efficiency of charge carriers. Different photocatalytic reaction processes and mechanisms over pure BiOBr and heterojunctions are proposed.
Collapse
Affiliation(s)
- Fa-tang Li
- College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China.
| | | | | | | | | | | | | |
Collapse
|
92
|
Veréb G, Gyulavári T, Pap Z, Baia L, Mogyorósi K, Dombi A, Hernádi K. Visible light driven photocatalytic elimination of organic- and microbial pollution by rutile-phase titanium dioxides: new insights on the dynamic relationship between morpho-structural parameters and photocatalytic performance. RSC Adv 2015. [DOI: 10.1039/c5ra03719k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
For the visible light driven photocatalytic performance of rutile the presence of Ti–O–O– entities is more preferable than Ti3+.
Collapse
Affiliation(s)
- G. Veréb
- Research Group of Environmental Chemistry
- Institute of Chemistry
- University of Szeged
- Szeged
- Hungary
| | - T. Gyulavári
- Research Group of Environmental Chemistry
- Institute of Chemistry
- University of Szeged
- Szeged
- Hungary
| | - Zs. Pap
- Research Group of Environmental Chemistry
- Institute of Chemistry
- University of Szeged
- Szeged
- Hungary
| | - L. Baia
- Faculty of Physics
- Babes–Bolyai University
- Cluj–Napoca
- Romania
- Institute for Interdisciplinary Research on Bio-Nano-Sciences
| | - K. Mogyorósi
- Research Group of Environmental Chemistry
- Institute of Chemistry
- University of Szeged
- Szeged
- Hungary
| | - A. Dombi
- Research Group of Environmental Chemistry
- Institute of Chemistry
- University of Szeged
- Szeged
- Hungary
| | - K. Hernádi
- Research Group of Environmental Chemistry
- Institute of Chemistry
- University of Szeged
- Szeged
- Hungary
| |
Collapse
|
93
|
Yang R, Lu X, Zhang Z, Wang X, Tang D, Zhu L. Three-dimensionally ordered macroporous LaMnO3 with tunable oxygen vacancies via nitric acid-aided modulating and their catalytic combustion properties. RSC Adv 2015. [DOI: 10.1039/c5ra19561f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Three-dimensionally ordered macroporous (3DOM) LaMnO3 oxides with tunable oxygen vacancies have been successfully fabricated via a facile nitric acid-aided modulating sol–gel method.
Collapse
Affiliation(s)
- Renchun Yang
- School of Biological and Chemical Engineering
- Anhui Polytechnic University
- Wuhu
- P. R. China
| | - Xiaojia Lu
- School of Biological and Chemical Engineering
- Anhui Polytechnic University
- Wuhu
- P. R. China
| | - Zhihua Zhang
- School of Biological and Chemical Engineering
- Anhui Polytechnic University
- Wuhu
- P. R. China
| | - Xiuxiang Wang
- School of Biological and Chemical Engineering
- Anhui Polytechnic University
- Wuhu
- P. R. China
| | - Dingxing Tang
- School of Biological and Chemical Engineering
- Anhui Polytechnic University
- Wuhu
- P. R. China
| | - Lingting Zhu
- School of Biological and Chemical Engineering
- Anhui Polytechnic University
- Wuhu
- P. R. China
| |
Collapse
|
94
|
Atomic-scale control of TiO₆ octahedra through solution chemistry towards giant dielectric response. Sci Rep 2014; 4:6582. [PMID: 25301286 PMCID: PMC4192633 DOI: 10.1038/srep06582] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 09/17/2014] [Indexed: 11/08/2022] Open
Abstract
The structures of many important functional oxides contain networks of metal-oxygen polyhedral units i.e.MOn. The correlation between the configurations and connectivities of these MOn to properties is essentially important to be well established to conduct the design, synthesis and application of new MOn-based functional materials. In this paper, we report on an atomic-scale solution-chemistry approach that for the first time enables TiO6 octahedral network control starting from metastable brookite TiO2 through simultaneously tuning pH values and interfering ions (Fe3+, Sc3+, and Sm3+). The relationship between solution chemistry and the resultant configuration/connectivity of TiO6 octahedra in TiO2 and lepidocrocite titanate is mapped out. Apart from differing crystalline phases and morphologies, atomic-scale TiO6 octahedral control also endows numerous defect dipoles for giant dielectric responses. The structural and property evolutions are well interpreted by the associated H+/OH− species in solution and/or defect states associated with Fe3+ occupation within TiO6 octahedra. This work therefore provides fundamental new insights into controlling TiO6 octahedral arrangement essential for atomic-scale structure-property design.
Collapse
|
95
|
Li X, Cui S, Wang D, Zhou Y, Zhou H, Hu Y, Liu JG, Long Y, Wu W, Hua J, Tian H. New organic donor-acceptor-π-acceptor sensitizers for efficient dye-sensitized solar cells and photocatalytic hydrogen evolution under visible-light irradiation. CHEMSUSCHEM 2014; 7:2879-2888. [PMID: 25154958 DOI: 10.1002/cssc.201402414] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 07/07/2014] [Indexed: 06/03/2023]
Abstract
Two organic donor-acceptor-π-acceptor (D-A-π-A) sensitizers (AQ and AP), containing quinoxaline/pyrido[3,4-b]pyrazine as the auxiliary acceptor, have been. Through fine-tuning of the auxiliary acceptor, a higher designed and synthesized photoelectric conversion efficiency of 6.02% for the AQ-based dye-sensitized solar cells under standard global AM1.5 solar conditions was achieved. Also, it was found that AQ-Pt/TiO2 photocatalysts displayed a better rate of H2 evolution under visible-light irradiation (420 nm<λ<780 nm) because of the stability of the oxidized states and the lower rates of electron recombination. Importantly, sensitizers AQ and AP-Pt/TiO2 showed strong photocatalytic activity during continuous light soaking for 10 h with methanol as the sacrificial electron donor. Additionally, the processes of their intermolecular electron transfer were further investigated theoretically by using time-dependent DFT. The calculated results indicate that the auxiliary acceptor plays the role of an electron trap and results in broad spectral responses.
Collapse
Affiliation(s)
- Xing Li
- Key Laboratory for Advanced Materials, Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237 (P.R. China), Fax: (+86) 21-64252758
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
96
|
Li FT, Zhao Y, Wang Q, Wang XJ, Hao YJ, Liu RH, Zhao D. Enhanced visible-light photocatalytic activity of active Al₂O₃/g-C₃N₄ heterojunctions synthesized via surface hydroxyl modification. JOURNAL OF HAZARDOUS MATERIALS 2014; 283:371-81. [PMID: 25306536 DOI: 10.1016/j.jhazmat.2014.09.035] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 08/08/2014] [Accepted: 09/04/2014] [Indexed: 05/27/2023]
Abstract
Novel Al2O3/g-C3N4 heterojunction photocatalysts were fabricated through ultrasonic dispersion method. Al2O3, obtained via solution combustion, contained amorphous ingredient with lots of defect sites and was used as active component for transferring photo-induced electrons of g-C3N4. G-C3N4 was grafted surface hydroxyl groups in the presence of ammonia aqueous solution to combine with Al2O3 possessing positive charges via hydrogen bond. The XRD, SEM, element map, TEM, HRTEM, FT-IR, and XPS results indicate that these synthesized materials are two-phase hybrids of Al2O3 and g-C3N4 with interaction. The photocatalytic results for the degradation of rhodamine B (RhB) indicate that the most active heterojunction proportion is 60wt.% g-C3N4:40wt.% Al2O3, the visible light photocatalytic activity of which is 3.8 times that of a mechanical mixture. The enhanced performance is attributed to the high separation efficiency of photo-induced electrons from the LUMO of g-C3N4 injected into the defect sites of Al2O3, which is verified by photoluminescence spectroscopy (PL) and surface photovoltage (SPV) measurements. The electron paramagnetic resonance (EPR) signals and radical scavengers trapping experiments reveal holes (h(+)) and superoxide anion radical (O2(-)) are the main active species responsible for the degradation of RhB.
Collapse
Affiliation(s)
- Fa-Tang Li
- College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China.
| | - Ye Zhao
- College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Qing Wang
- College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Xiao-Jing Wang
- College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Ying-Juan Hao
- College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Rui-Hong Liu
- College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Dishun Zhao
- College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| |
Collapse
|
97
|
Wang X, Zhang K, Guo X, Shen G, Xiang J. Synthesis and characterization of N-doped TiO2loaded onto activated carbon fiber with enhanced visible-light photocatalytic activity. NEW J CHEM 2014. [DOI: 10.1039/c4nj00962b] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
98
|
Kapilashrami M, Zhang Y, Liu YS, Hagfeldt A, Guo J. Probing the Optical Property and Electronic Structure of TiO2 Nanomaterials for Renewable Energy Applications. Chem Rev 2014; 114:9662-707. [DOI: 10.1021/cr5000893] [Citation(s) in RCA: 379] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Mukes Kapilashrami
- Advanced
Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Yanfeng Zhang
- College
of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, Hebei 050024, People’s Republic of China
| | - Yi-Sheng Liu
- Advanced
Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Anders Hagfeldt
- Physical
Chemistry, Department of Chemistry−Ångström Laboratory, Uppsala University, 751 20 Uppsala, Sweden
| | - Jinghua Guo
- Advanced
Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department
of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States
| |
Collapse
|
99
|
Li J, Yu Y, Zhang L. Bismuth oxyhalide nanomaterials: layered structures meet photocatalysis. NANOSCALE 2014; 6:8473-88. [PMID: 24975748 DOI: 10.1039/c4nr02553a] [Citation(s) in RCA: 371] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
In recent years, layered bismuth oxyhalide nanomaterials have received more and more interest as promising photocatalysts because their unique layered structures endow them with fascinating physicochemical properties; thus, they have great potential photocatalytic applications for environment remediation and energy harvesting. In this article, we explore the synthesis strategies and growth mechanisms of layered bismuth oxyhalide nanomaterials, and propose design principles of tailoring a layered configuration to control the nanoarchitectures for high efficient photocatalysis. Subsequently, we focus on their layered structure dependent properties, including pH-related crystal facet exposure and phase transformation, facet-dependent photoactivity and molecular oxygen activation pathways, so as to clarify the origin of the layered structure dependent photoreactivity. Furthermore, we summarize various strategies for modulating the composition and arrangement of layered structures to enhance the photoactivity of nanostructured bismuth oxyhalides via internal electric field tuning, dehalogenation effect, surface functionalization, doping, plasmon modification, and heterojunction construction, which may offer efficient guidance for the design and construction of high-performance bismuth oxyhalide-based photocatalysis systems. Finally, we highlight some crucial issues in engineering the layered-structure mediated properties of bismuth oxyhalide photocatalysts and provide tentative suggestions for future research on increasing their photocatalytic performance.
Collapse
Affiliation(s)
- Jie Li
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Institute of Environmental Chemistry, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China.
| | | | | |
Collapse
|
100
|
Wu H, Kan K, Wang L, Zhang G, Yang Y, Li H, Jing L, Shen P, Li L, Shi K. Electrospinning of mesoporous p-type In2O3/TiO2composite nanofibers for enhancing NOxgas sensing properties at room temperature. CrystEngComm 2014. [DOI: 10.1039/c4ce01248h] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|