INFLUENCE OF CUO LOADING ON DISPERSION AND REDUCTION BEHAVIOR OF CUO TIO2 (ANATASE) SYSTEM/

Authors
Citation
B. Xu et al., INFLUENCE OF CUO LOADING ON DISPERSION AND REDUCTION BEHAVIOR OF CUO TIO2 (ANATASE) SYSTEM/, Journal of the Chemical Society. Faraday transactions (Print), 94(13), 1998, pp. 1905-1909
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
ISSN journal
0956-5000
Volume
94
Issue
13
Year of publication
1998
Pages
1905 - 1909
Database
ISI
SICI code
0956-5000(1998)94:13<1905:IOCLOD>2.0.ZU;2-L
Abstract
In this paper, Brunomer-Emmett-Teller (BET) surface area, X-ray diffra ction (XRD), X-ray photoelectron spectroscopy (XPS) and temperature pr ogrammed reduction (TPR) are used to investigate the interactions betw een CuO and the TiO2 (anatase) support, in samples prepared by impregn ating the TiO2 support with an aqueous solution of Cu(NO3)(2). 6H(2)O. The results indicate that the surface structure of the TiO2 support h as not been changed by supported CuO, and the dispersion capacity of C uO is about 6.98 Cu2+,(TiO2)(-2). The structure of the supported coppe r oxide species is strongly dependent on the amount of CuO loaded. At low CuO loading, only a highly dispersed surface CuO species is formed on the support and when the CuO loading exceeds its dispersion capaci ty, crystalline CuO is formed as all the vacant surface sites of the T iO2 support are occupied by Cu2+ ions. In addition, it is found that b oth the reduction behavior and the crystalline-structure transition of the TiO2 support are related to the interactions between TiO2 and CuO .