期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 36, 页码 18998-19006出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta04611a
关键词
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资金
- National Key Project on Basic Research [2013CB933203]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000]
- Natural Science Foundation of China [21373224, 21577143, 51502289, 21607153]
- Natural Science Foundation of Fujian Province [2015J05044, 2017J05031]
- Key Project of Frontier Science of the Chinese Academy of Sciences [QYZDB-SSW-JSC027]
Efficient separation and extraction of photo-induced carriers are crucial aspects of efficient semiconductor photocatalytic systems employed for photocatalytic oxidation (PCO) technology. In this study, a Pt-loaded KSr2Nb5O15 composite, as a novel photocatalyst, is reported for gaseous ethylene photo-oxidation, performing excellent PCO activity. Tungsten bronze-type KSr2Nb5O15 (KSNO) with surface oxygen vacancies is prepared by a facile and low-cost molten salt synthesis method at 1200 degrees C for 6 h and a possible morphology evolution process was proposed. Pt was loaded on KSNO through a facile photodeposition method. The strong metal-support interaction (SMSI) between the Pt nanoparticles and the oxygen-deficient KSNO support is beneficial for superior photocatalytic efficiency and stability toward ethylene photo-oxidation. What's more, the structure and charge transfer path in the synthesized photocatalysts were investigated by X-ray photoelectron spectroscopy (XPS), high-resolution electron microscopy, and electron paramagnetic resonance (EPR).
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