Pt nanoparticles on TiO2 with novel metal–semiconductor interface as highly efficient photocatalyst
Pt nanoparticles on TiO2 with novel metal–semiconductor interface as highly efficient photocatalyst
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DOI：
10.1016/j.matlet.2005.06.011
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发表时间：
2005-11
影响因子：
3
通讯作者：
Jijun Zou;Chaoben Chen;Chang‐jun Liu;Yue-ping Zhang;You Han;L. Cui
中科院分区：
文献类型：
--
作者：
Jijun Zou;Chaoben Chen;Chang‐jun Liu;Yue-ping Zhang;You Han;L. Cui
采用辉光放电改性浸渍法将Pt纳米粒子负载在TiO 2表面。用高分辨透射电镜观察了金属-半导体界面结构。Pt[111]的条纹在界面处几乎垂直于TiO 2 [101]的条纹。这样的对准关系导致在很大程度上扭曲的界面，允许金属和半导体之间的紧密接触和增强的相互作用。当用作光催化剂时，这种Pt-TiO 2界面可以促进光诱导电子从半导体到金属的转移，促进近紫外吸收。具有这种界面的光催化剂对醇/水混合物的制氢活性高于具有较小扭曲界面的光催化剂。
Pt nanoparticles were supported on the TiO2surface using a glow discharge modified impregnation method. The metal–semiconductor interface structure was observed by high-resolution TEM. The fringes of Pt[111] were nearly perpendicular to those of TiO2[101] at the interface. Such alignment relationship resulted in a largely distorted interface allowing a close contact and enhanced interaction between the metal and the semiconductor. When used as photocatalyst, this Pt–TiO2interface could improve the photo-induced electron transfer from the semiconductor to the metal and promote the near-UV absorption. The photocatalyst with such interface exhibited higher activity for hydrogen generation from alcohol/water mixture than that with a less distorted interface.