Enhanced photocatalytic activity of β-Ga2O3 nanowires by Au nanoparticles decoration
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Combining plasmonic noble metals with semiconductor materials has been considered to be an effective way to improve catalyst performance. In the present paper, Au nanoparticles (NPs) were decorated onto CVD-grown β-Ga2O3 nanowires (NWs) through a chemical reduction method. Different quantity of HAuCl4 solution was used to control the size and density of Au NPs. The photocatalytic activity of the Au–Ga2O3 NWs is evaluated by degrading rhodamine B (Rh B) under UV and visible light irradiation. It is found that the size and density of the Au NPs had a great influence on the photocatalytic efficiency of β-Ga2O3 NWs. And Ga2O3 NWs with Au NPs of ~ 5.7 nm size and ~ 420/μm2 density shows the best catalytic efficiency. Moreover, Au NPs attachment on the Ga2O3 could extend its photocatalytic activity towards the visible light irradiation, which is significant to efficient utilization more solar light. A jointly effect of both the interfacial Schottky potential field between Au NPs and β-Ga2O3 NWs and local surface plasma resonance excitation is proposed to contribute the enhancement effects.
This work has been supported by the National Natural Science Foundation of China (Grant No. 11104255) and Fundamental Research Funds for the Central Universities.
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Conflict of interest
The authors declare that they have no conflict of interest.
- 13.Bagheri M, Mahjoub A, Khodadadi A, Mortazavi Y (2014) Fast photocatalytic degradation of congo red using CoO-doped β-Ga2O3 nanostructures. RCS Adv 4:33262–33268Google Scholar
- 46.Liu H, Hao H, Xing J, Dong J, Zhang Z, Zheng Z, Zhao K (2016) Enhanced photocatalytic capability of zinc ferrite nanotube arrays decorated with gold nanoparticles for visible light-driven photodegradation of rhodamine B. J Mater Sci 51:5872–5879. https://doi.org/10.1007/s10853-016-9888-5 CrossRefGoogle Scholar