期刊
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
卷 32, 期 14, 页码 19764-19777出版社
SPRINGER
DOI: 10.1007/s10854-021-06501-5
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资金
- Kuwait Foundation for the Advancement of Sciences (KFAS) [EA071C, PR17-12SC-01]
- Kuwait Institute for Scientific Research [GS 01/01, GS 01/05]
A simple photoreduction method was used to deposit Au nanoparticles into mixed phase titanium dioxide nanowires, resulting in Au/TiO2 materials with excellent photocatalytic properties. Among the synthesized samples, the 0.1% Au/TiO2 catalyst showed the highest photocatalytic efficiency for resorcinol degradation.
A simple photoreduction method was used to deposit Au nanoparticles (Au NPs) at different loadings (0.1-2 Au%) into mixed phase brookite-anatase titanium dioxide (TiO2) nanowires (NWs). X-ray diffraction (XRD) verified that the Au/TiO2 NWs were composed of a mixture of brookite (84.24%) and anatase (15.76%); while transmission electron microscopy (TEM) showed a uniform dispersion of 5- to 10-nm Au NPs over the TiO2 NWs. The photocatalytic performance of the synthesized Au/TiO2 NWs was evaluated for the degradation of resorcinol under UVA illumination. The 0.1% Au/TiO2 NWs photocatalyst offered the best photocatalytic efficiency for resorcinol degradation among the synthesized samples, with the rate, constantly increasing from 0.0014 to 0.003 min(-1) after adding 0.1% Au into TiO2 NWs. At Au higher loadings, the rate decreased (0.0005 min(-1) for 2% Au/TiO2 photocatalyst. The enhanced activity of the 0.1% Au/TiO2 NWs sample could be ascribed to the effective electron-hole separation at brookite/anatase phase junctions. The Au/TiO2 NWs has maintained good activity over five catalytic test cycles.
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