Abstract
A new delafossite oxide, Ag[Li 1/3 Ru 2/3 ]O 2 , synthesized by ion-exchanging interlayer-Li + with Ag + in layered Li 2 RuO 3 , is reported. The transformation of layered Li 2 RuO 3 (monoclinic, space group C 2/ c ) to Ag[Li 1/3 Ru 2/3 ]O 2 possessing a delafossite structure (space group R 3 ¯ m ) has been established with powder X-ray diffraction. The successful conversion of Li[Li 1/3 Ru 2/3 ]O 2 to Ag[Li 1/3 Ru 2/3 ]O 2 is further confirmed by EDAX analysis. The diffuse reflectance spectrum of Ag[Li 1/3 Ru 2/3 ]O 2 shows broad absorption in the UV–visible region suggesting its use as a photocatalyst. The photocatalytic activity of Ag[Li 1/3 Ru 2/3 ]O 2 has been investigated by degrading various dyes. It showed significant photocatalytic activity for dye degradation both under UV and solar radiation.
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