期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 40, 页码 17676-17683出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202007859
关键词
crystalline titania; mesoporous materials; micellar self-assembly; photocatalysis
资金
- State Key Basic Research Program of China [2018YFA0209401, 2017YFA0207303]
- National Science Foundation of China [21733003]
- Science and Technology Commission of Shanghai Municipality [17JC1400100]
- China Scholarship Council [201806100112]
- China Postdoctoral Science Foundation
By introducing a compatible reducing agent (2-ethylimidazole) into a mono-micelle assembly process, we present a type of ordered mesoporous TiO(2)microspheres that combines radially aligned mesostructure with Ti(3+)defects in mesoporous frameworks. Such reductant acts as a building block of mesostructured frameworks and reduces Ti(4+)in situ to generate defects during calcination, giving rise to the coexistence of bulk Ti(3+)defects and an ordered mesostructure. The mesoporous TiO(2)has both excellent mesoporosity (a high surface area of 106 m(2) g(-1), a mean pore size of 18.4 nm) and stable defects with an extended photoresponse. Such integration of unique mesoscopic architecture and atomic vacancies provide both effective mass transportation and enhanced light utilization, leading to a remarkable increase in H(2)generation rate. A maximum H(2)evolution rate of 19.8 mmol g(-1) h(-1)can be achieved, along with outstanding stability under solar light.
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