The narrow bandgap of Ag2S quantum dots was used to decorate TiO2 nanotube arrays (TiO2 NTAs) by the successive ionic layer adsorption and reaction (SILAR) method to enhance its photoelectrochemical performance. The micromorphology of the photoanode films prepared by the SILAR under different parameters (including different cycle times, capillary spot sample, and ultrasound-assisted) was systematically analyzed. The photoanode film Ag2S/TiO2 prepared by the SILAR under the ultrasound-assisted method shows Ag2S evenly distributed in TiO2 NTAs. At the same time, the corresponding photoabsorption range has been extended to the visible area, while the photocurrent density and photoconversion efficiency have been increased to ~1.8 mA/cm2 and 0.6%, respectively.

中文翻译：

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连续离子层吸附反应优化Ag2S/TiO2界面光电化学性能

Ag2S量子点的窄带隙通过连续离子层吸附和反应（SILAR）方法装饰TiO2纳米管阵列（TiO2NTAs）以提高其光电化学性能。系统地分析了在不同参数（包括不同循环时间、毛细管点样品和超声辅助）下由 SILAR 制备的光电阳极薄膜的微观形貌。SILAR 在超声辅助下制备的光阳极薄膜 Ag2S/TiO2 显示 Ag2S 均匀分布在 TiO2 NTAs 中。同时，相应的光吸收范围扩展到可见光区域，而光电流密度和光转换效率分别提高到~1.8 mA/cm2和0.6%。