Journal
NANO RESEARCH
Volume 10, Issue 11, Pages 3920-3928Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1606-3
Keywords
multi-shelled hollow microsphere; titanium oxide; pseudo-brookite; heterostructure; photocatalytic water oxidation
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Funding
- National Science Fund for Distinguished Young Scholars [21325105]
- National Natural Science Foundation of China [21590795, 51572261, 51472244, 51672274, 51661165013, 51372245, 51672276]
- National Key Projects for Fundamental Research and Development of China [2016YFB0600903]
- Youth Innovation Promotion Association of CAS [2017070]
- CAS Interdisciplinary Innovation Team
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There remains a pressing challenge in the fabrication of superior photocatalysts for light-driven water oxidation. Here, we designed and fabricated hetero-structured TiO2/Fe2TiO5 hollow microspheres with single-, double-, closed-double-, triple-, and core-shell structures and different Fe/Ti molar ratios using a facile sequential templating approach. The closed-double-shelled TiO2/Fe2TiO5 hollow microspheres with 35% Fe exhibited the highest oxygen evolution reaction rate up to 375 mu mol.g(-1).h(-1) and good stability for 5 h. The high performance can be attributed to the closed-double shell, which had more reactive sites and greater light-harvesting ability, self-supported thin shells with short charge-transfer paths, and a favorable staggered band alignment between the TiO2 and Fe2TiO5.
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