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Photocatalytic activity of Ag/ZnO heterostructure nanocatalyst: Correlation between structure and property

Y. H. Zheng ; C. Q. Chen ; Y. Y. Zhan ; X. Y. Lin ; Q. Zheng ; K. M. Wei ; Jiefang Zhu (Institutionen för teknisk fysik, Kemisk fysik)
Journal of Physical Chemistry C (1932-7447). Vol. 112 (2008), 29, p. 10773-10777.
[Artikel, refereegranskad vetenskaplig]

Ag/ZnO heterostructure nanocatalysts with Ag content of 1 wt % are successfully prepared through three different simple methods, where chemical reduction and photolysis reaction are adopted to fabricate the heterostructure. The dispersity of Ag clusters and/or nanoparticles in Ag/ZnO nanocatalyst is investigated by EDX mapping and XPS techniques. The experimental results show that deposition-precipitation is an efficient method to synthesize Ag/ZnO nanocatalyst with highly dispersed Ag clusters and/or nanoparticles; the photocatalytic activity of Ag/ZnO photocatalysts mainly depends on the dispersity of metallic Ag in Ag/ZnO nanocatalyst; the higher the dispersity of metallic Ag in Ag/ZnO nanocatalyst is, the higher the photocatalytic activity of Ag/ZnO photocatalyst should be. In addition, it is also found that the dispersity of Ag/ZnO photocatalyst in the dye solution is another key factor for liquid-phase photocatalysis due to the UV-light utilizing efficiency. The higher the UV-light utilizing efficiency is, the higher the photocatalytic activity of Ag/ZnO heterostructure photocatalyst should be.

Nyckelord: CATALYTIC-ACTIVITY, WGS REACTION, DISPERSION, REDUCTION, NANOPARTICLES, PERFORMANCE, NANOCRYSTALS, COMPOSITES, OXIDATION, CLUSTERS



Denna post skapades 2009-10-26.
CPL Pubid: 100808

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kemisk fysik (1900-2015)

Ämnesområden

Teknisk fysik

Chalmers infrastruktur