Colorful Silver/Carbon Nitride Composites Obtained by Photoreduction

doi:10.1007/s40242-020-0349-y

Abstract

Abstract: The Ag⁺ photoreduction by graphitic carbon nitride(g-CN) materials in a high concentration of Ag⁺ solution is reported, and a series of colorful Ag/g-CN composites is prepared and characterized. The chromatic change correlates to the carbon nitride materials synthesized at different heating temperatures(CN_T, where T means heating temperature), taking advantage of the different photocatalytic activities of different CN_T. The mechanism beneath this phenomenon is attributed to two factors:the particle size of Ag NPs and the coordinate effect of Ag NPs on CN_T sheets. Interestingly, the multi-colors of Ag/g-CN composites display only on the CN_T materials synthesized from heating melamine-cyanuric acid precursor, but not on the CN_T from heating pure melamine. The color of the as-prepared Ag/g-CN composites can endure the corrosion of HNO₃ and ethanol, which shows a good chemical stability and may hint its application as chromophores.

Key words: Graphitic carbon nitride(g-CN), Photoreduction, Silver/g-CN composite

MENG Peng, XU Jingsan. Colorful Silver/Carbon Nitride Composites Obtained by Photoreduction[J]. Chemical Research in Chinese Universities, 2020, 36(6): 1136-1140.

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