Gold nanoparticles on titanium oxide effective for photocatalytic hydrogen formation under visible light
Gold nanoparticles on titanium oxide effective for photocatalytic hydrogen formation under visible light
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DOI：
10.1016/j.apcatb.2011.12.029
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发表时间：
2012-04
影响因子：
22.1
通讯作者：
H. Yuzawa;Tomoko Yoshida;H. Yoshida
中科院分区：
文献类型：
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作者：
H. Yuzawa;Tomoko Yoshida;H. Yoshida
在可见光（510- 740 nm）照射下，研究了载金氧化钛光催化乙醇水溶液制氢的性能。通过目前的等离子体光催化不断产生氢气。在该体系中，具有较大粒径的Au纳米颗粒由于局域表面等离子体共振（LSPR）的高效率而基本上对反应有效。此外，具有短棒状形状的Au纳米颗粒比具有球形形状的纳米颗粒更有效地用于反应，因为电子从Au纳米颗粒转移到氧化钛的导带的效率更高。另一方面，Au纳米粒子的聚集体不适合于反应，这是由于电子转移效率低。最后，具有较大粒度的含钛氧化物的纳米晶相最优选用于反应。
Photocatalytic hydrogen production from aqueous ethanol was investigated over Au-loaded titanium oxide under visible light (510–740nm) irradiation. Hydrogen was constantly produced through the present plasmonic photocatalysis. In this system, Au nanoparticles with larger particle size were essentially effective for the reaction due to the high efficiency for the localized surface plasmon resonance (LSPR). Further, Au nanoparticles with short rod-like shapes were more effective for the reaction than those with spherical shape because of the higher efficiency for the electron transfer from the Au nanoparticle to the conduction band of titanium oxide. On the other hand, aggregates of the Au nanoparticles were not appropriate for the reaction, which derived from the low efficiency of the electron transfer. Finally, titanium oxide containing anatase phase with larger particle size was most preferred for the reaction.