The surface chemistry of hybrid nanometer-sized particles .2. Characterization and microstructure of Au clusters supported on TiO2

被引:46
作者
Wang, CY [1 ]
Liu, CP [1 ]
Chen, J [1 ]
Shen, T [1 ]
机构
[1] ACAD SINICA, INST PHOTOG CHEM, BEIJING 100101, PEOPLES R CHINA
基金
中国国家自然科学基金;
关键词
photocatalytic reduction; Au/TiO2; surface plasmon; phase composition; binding energy;
D O I
10.1006/jcis.1997.4976
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Nanometer sized Au/TiO2 particles were synthesized by irradiation of a HAuCl4 solution containing colloidal TiO2 with light of wavelength (lambda) >330 nm. The absorption maximum attributed to the surface plasmon band of gold was observed at 530 nm, a red shift of about 10 nm from the position in aqueous solution, The particle size of Au/TiO2 determined by TEM was about 25 nm. The Au clusters are situated on the surface of TiO2 in terms of microcrystallite, which was confirmed by HRTEM, EDS, and XRD, A negative shift of binding energy in the Au 4f(7/2) for gold cluster an the surface of TiO2 was found, and the electronic interaction between the metal and the support was discussed. (C) 1997 Academic Press.
引用
收藏
页码:464 / 470
页数:7
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