Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 12, Pages 9321-9327Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am501651m
Keywords
tungsten oxide; photocatalytic; transient photovoltage; surface photovoltage spectroscopy
Funding
- National Basic Research Program of China (973 Program) [2013CB632403]
- National Natural Science Foundation of China [21173103, 51172090]
- Science and Technology Developing Funding of Jilin Province [201115012]
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In this work, tungsten oxide (WO3) with three-dimensional flower-like and wheel-like architectures, based on the spontaneous aggregation of one-dimensional nanorods, were successfully fabricated by adjusting the pH of the precursor solution. The influence of pH on the morphologies of WO3 was systematically studied, and the different WO3 architectures were used to photocatalytically degrade rhodamine B. The kinetic features of photoinduced charges of as-prepared WO3 have been investigated by surface photovoltage spectroscopy and transient photovoltage techniques in detail. WO3 with wheel-like and flower-like structures possess the higher charge separation efficiency and the lower recombination rate of photoinduced charges, resulting in higher photocatalytic activity for the degradation of RhB.
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