Photoluminescence spectroscopy as a probe of silver doped zeolites as photocatalysts

Abstract Nanoclusters of silver ions, dicyanoaurate ions, and dicyanoargentate ions doped in zeolite hosts have been prepared. Luminescence, Raman, and FT-EXAFS spectroscopies along with extended Huckel calculations indicate the formation of silver and [M(CN) 2 − ] m (M=Au and Ag) oligomers in the zeolite host. The silver and gold nanoclusters in zeolites enhance the photodecomposition rates of NO x , malathion, and carbaryl when compared to the pollutant's behavior in the absence of silver doped zeolites with the observed rate increase attributed to excimer and exciplex formation.

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