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To develop efficient visible-light photocatalysis on α-Fe2O3, it is highly desirable to promote visible-light-excited high-energy-level electron transfer to a proper energy platform thermodynamically. Herein, based on the transient-state surface photovoltage responses and the atmosphere-controlled steady-state surface photovoltage spectra, it is demonstrated that the lifetime and separation of photogenerated charges of nanosized α-Fe2O3 are increased after coupling a proper amount of nanocrystalline SnO2. This naturally leads to greatly improved photocatalytic activities for CO2 reduction and acetaldehyde degradation. It is suggested that the enhanced charge separation results from the electron transfer from α-Fe2O3 to SnO2, which acts as a proper energy platform. Based on the photocurrent action spectra, it is confirmed that the coupled SnO2 exhibits longer visible-light threshold wavelength (~590 nm) compared with the coupled TiO2 (~550 nm), indicating that the energy platform introduced by SnO2 would accept more photogenerated electrons from α-Fe2O3. Moreover, electrochemical reduction experiments proved that the coupled SnO2 possesses better catalytic ability for reducing CO2 and O2. These are well responsible for the much efficient photocatalysis on SnO2-coupled α-Fe2O3.
Sarkar, A.; Gracia-Espino, E.; Wågberg, T.; Shchukarev, A.; Mohl, M.; Rautio, A. -R.; Pitkänen, O.; Sharifi, T.; Kordas, K.; Mikkola, J. P. Photocatalytic reduction of CO2 with H2O over modified TiO2 nanofibers: Understanding the reduction pathway. Nano Res. 2016, 9, 1956-1968.
Li, Y. W.; Chan, S. H.; Sun, Q. Heterogeneous catalytic conversion of CO2: A comprehensive theoretical review. Nanoscale 2015, 7, 8663-8683.
Demeestere, K.; Dewulf, J.; Van Langenhove, H. Heterogeneous photocatalysis as an advanced oxidation process for the abatement of chlorinated, monocyclic aromatic and sulfurous volatile organic compounds in air: State of the art. Crit. Rev. Environ. Sci. Technol. 2007, 37, 489-538.
Wang, H. L.; Zhang, L. S.; Chen, Z. G.; Hu, J. Q.; Li, S. J.; Wang, Z. H.; Liu, J. S.; Wang, X. C. Semiconductor heterojunction photocatalysts: Design, construction, and photocatalytic performances. Chem. Soc. Rev. 2014, 43, 5234-5244.
Shen, S. H.; Lindley, S. A.; Chen, X. Y.; Zhang, J. Z. Hematite heterostructures for photoelectrochemical water splitting: Rational materials design and charge carrier dynamics. Energy Environ. Sci. 2016, 9, 2744-2775.
Moniz, S. J. A.; Shevlin, S. A.; Martin, D. J.; Guo, Z. X.; Tang, J. W. Visible-light driven heterojunction photocatalysts for water splitting—A critical review. Energy Environ. Sci. 2015, 8, 731-759.
Mishra, M.; Chun, D. M. α-Fe2O3 as a photocatalytic material: A review. Appl. Catal. A: Gen. 2015, 498, 126-141.
Li, Z. J.; Luan, Y. B.; Qu, Y.; Jing, L. Q. Modification strategies with inorganic acids for efficient photocatalysts by promoting the adsorption of O2. ACS Appl. Mater. Interfaces 2015, 7, 22727-22740.
Marszewski, M.; Cao, S. W.; Yu, J. G.; Jaroniec, M. Semiconductor-based photocatalytic CO2 conversion. Mater. Horiz. 2015, 2, 261-278.
Zhang, Q. F.; Uchaker, E.; Candelaria, S. L.; Cao, G. Z. Nanomaterials for energy conversion and storage. Chem. Soc. Rev. 2013, 42, 3127-3171.
Singh, R. B.; Matsuzaki, H.; Suzuki, Y.; Seki, K.; Minegishi, T.; Hisatomi, T.; Domen, K.; Furube, A. Trapped state sensitive kinetics in LaTiO2N solid photocatalyst with and without cocatalyst loading. J. Am. Chem. Soc. 2014, 136, 17324-17331.
Xie, M. Z.; Fu, X. D.; Jing, L. Q.; Luan, P.; Feng, Y. J.; Fu, H. G. Long-lived, visible-light-excited charge carriers of TiO2/BiVO4 nanocomposites and their unexpected photoactivity for water splitting. Adv. Energy Mater. 2014, 4, 1300995.
Luan, P.; Xie, M. Z.; Liu, D. N.; Fu, X. D.; Jing, L. Q. Effective charge separation in the rutile TiO2 nanorod-coupled α-Fe2O3 with exceptionally high visible activities. Sci. Rep. 2014, 4, 6180.
Nayak, A. K.; Ghosh, R.; Santra, S.; Guha, P. K.; Pradhan, D. Hierarchical nanostructured WO3-SnO2 for selective sensing of volatile organic compounds. Nanoscale 2015, 7, 12460-12473.
Zhang, P.; Wang, L. J.; Zhang, X.; Shao, C. L.; Hu, J. H.; Shao, G. S. SnO2-core carbon-shell composite nanotubes with enhanced photocurrent and photocatalytic performance. Appl. Catal. B: Environ. 2015, 166-167, 193-201.
Li, K.; Zeng, X. Q.; Gao, S. M.; Ma, L.; Wang, Q. Y.; Xu, H.; Wang, Z. Y.; Huang, B. B.; Dai, Y.; Lu, J. Ultrasonic-assisted pyrolyzation fabrication of reduced SnO2-x/g-C3N4 heterojunctions: Enhance photoelectrochemical and photocatalytic activity under visible LED light irradiation. Nano Res. 2016, 9, 1969-1982.
Thapa, A.; Zai, J. T.; Elbohy, H.; Poudel, P.; Adhikari, N.; Qian, X. F.; Qiao, Q. Q. TiO2 coated urchin-like SnO2 microspheres for efficient dye-sensitized solar cells. Nano Res. 2014, 7, 1154-1163.
McCool, N. S.; Swierk, J. R.; Nemes, C. T.; Schmuttenmaer, C. A.; Mallouk, T. E. Dynamics of electron injection in SnO2/TiO2 core/shell electrodes for water-splitting dye- sensitized photoelectrochemical cells. J. Phys. Chem. Lett. 2016, 7, 2930-2934.
Zada, A.; Humayun, M.; Raziq, F.; Zhang, X. L.; Qu, Y.; Bai, L. L.; Qin, C. L.; Jing, L. Q.; Fu, H. G. Exceptional visible-light-driven cocatalyst-free photocatalytic activity of g-C3N4 by well designed nanocomposites with plasmonic Au and SnO2. Adv. Energy Mater. 2016, 6, 1601190.
Wu, S. S.; Cao, H. Q.; Yin, S. F.; Liu, X. W.; Zhang, X. R. Amino acid-assisted hydrothermal synthesis and photocatalysis of SnO2 nanocrystals. J. Phys. Chem. C 2009, 113, 17893- 17898.
Peng, L. L.; Xie, T. F.; Lu, Y. C.; Fan, H. M.; Wang, D. J. Synthesis, photoelectric properties and photocatalytic activity of the Fe2O3/TiO2 heterogeneous photocatalysts. Phys. Chem. Chem. Phys. 2010, 12, 8033-8041.
Pan, Y. X.; Sun, Z. Q.; Cong, H. P.; Men, Y. L.; Xin, S.; Song, J.; Yu, S. H. Photocatalytic CO2 reduction highly enhanced by oxygen vacancies on Pt-nanoparticle-dispersed gallium oxide. Nano Res. 2016, 9, 1689-1700.
Jing, L. Q.; Zhou, W.; Tian, G. H.; Fu, H. G. Surface tuning for oxide-based nanomaterials as efficient photocatalysts. Chem. Soc. Rev. 2013, 42, 9509-9549.
Yang, D. J.; Liu, H. W.; Zheng, Z. F.; Yuan, Y.; Zhao, J. C.; Waclawik, E. R.; Ke, X. B.; Zhu, H. Y. An efficient photocatalyst structure: TiO2(B) nanofibers with a shell of anatase nanocrystals. J. Am. Chem. Soc. 2009, 131, 17885- 17893.
Wang, J. J.; Huang, J.; Meng, J.; Li, Q. X.; Yang, J. L. Double-hole codoped huge-gap semiconductor ZrO2 for visible-light photocatalysis. Phys. Chem. Chem. Phys. 2016, 18, 17517-17524.
Zhang, X.; Zhang, L. Z.; Xie, T. F.; Wang, D. J. Low- temperature synthesis and high visible-light-induced photocatalytic activity of BiOI/TiO2 heterostructures. J. Phys. Chem. C 2009, 113, 7371-7378.
Zang, Y. P.; Li, L. P.; Li, X. G.; Lin, R.; Li, G. S. Synergistic collaboration of g-C3N4/SnO2 composites for enhanced visible-light photocatalytic activity. Chem. Eng. J. 2014, 246, 277-286.
Linsebigler, A. L.; Lu, G. Q.; Yates, J. T. Photocatalysis on TiO2 surfaces: Principles, mechanisms, and selected results. Chem. Rev. 1995, 95, 735-758.
Tu, W. G.; Zhou, Y.; Zou, Z. G. Photocatalytic conversion of CO2 into renewable hydrocarbon fuels: State-of-the-art accomplishment, challenges, and prospects. Adv. Mater. 2014, 26, 4607-4626.
Nie, Y.; Li, L.; Wei, Z. D. Recent advancements in Pt and Pt-free catalysts for oxygen reduction reaction. Chem. Soc. Rev. 2015, 44, 2168-2201.
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