Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 3, Issue 2, Pages 229-236Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am100875z
Keywords
tungsten trioxide; hydrothermal; capping agent; photocatalyst; water splitting
Funding
- Agency for Science, Technology and Research (A*STAR) of Singapore [092 101 0057]
- Ministry of Education of Singapore [RGM44/06]
- National Research Foundation of Singapore [NRF-2009-RF-09]
- National Natural Science Foundation of China (NSFC) [61006037, 61076015]
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Tungsten trioxide hydrate (3WO(3)center dot H(2)O) films with different morphologies were directly grown on fluorine doped tin oxide (FTO) subsi:rate via a facile crystal-seed-assisted hydrothermal method. Scanning electron microscopy (SEM) analysis showed that 3WO(3)center dot H(2)O thin films composed of platelike, wedgelike, and sheetlike nanostructures could be selectively synthesized by adding Na(2)SO(4), (NH(4))(2)SO(4), and CH(3)COONH(4) as capping agents, respectively. X-ray diffraction (XRD) studies indicated that these films were of orthorhombic structure. The as-prepared thin films after dehydration showed obvious photcicatalytic activities. The best film grown using CH(3)COONH(4) as a capping agent generated anodic photocurrents of 1.16 mA/cm(2) fork oxidization of methanol and 0.5 mA/cm(2) for water splitting with the highest photoconversion efficiency of about 0.3% under simulated solar illumination.
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