文摘
Visible-light-driven In-rich AgInS2 nanoplates and nanotubes were successfully prepared by a convenient co-precipitation strategy at low temperature. The effect of different In/Ag molar ratio in the raw materials on the physicochemical properties and photocatalytic activity of AgInS2 was investigated. The In/Ag molar ratio has an obvious effect on the morphology of AgInS2, and the physicochemical properties and photocatalytic activity of AgInS2 are also dependent on the In/Ag molar ratio. When the molar ratio of In/Ag is 9, the photoluminescence intensity of AgInS2 reaches a minimum value, while its photocurrent density is maximum (0.011 mA/cm2), indicating the most efficient separation of electron-hole pairs. The AgInS2 with the In/Ag molar ratio of 9 exhibits the highest visible-light photocatalytic activities with almost complete degradation of 2-nitrophenol, which is attributed to the narrowest band gap and the most efficient separation of electron-hole pairs. Moreover, In-rich AgInS2 exhibits excellent regeneration ability.