Ternary sulfide solid solution @ TiO2NTs composites synthesized by a two step process of anodization and solvothermal methods present a Ti-S bonding effect and enhanced visible light responsibility, which shows great practical potential in the photocatalytic application for hydrogen production. The aim of this work is to investigate the effects of the crystal forms of TiO2NTs, the amount of doped Ag, and other doped elements on the bonding effect between ternary sulfide solid solution and TiO2NTs through Raman spectra analysis. The results show that there is a strong Ti-S bonding effect between anatase TiO2NTs and ZnS-In2S3-Ag2S and the bonding degree is improved with the amount of anatase TiO2. The increase of Ag content strengthens the bonding effect between ZnS-In2S3-Ag2S and TiO2NTs. However, the excessive Ag+ leads to the formation of the mixture of ZnS-In2S3 and Ag2S instead of ZnS-In2S3-Ag2S and the Ti-S bonding effect disappears correspondingly. Cu2+ and Ni2+ can replace Ag+ to form ternary sulfide solid solution, and the Ti-S bonding effect with TiO2NTs is also found which is strengthened in the following order: Cu2+ &gt;Ag+ &gt;Ni2+. Also, UV-vis DRS spectra were studied to investigate the photoabsorption property of the ternary solid solution @ TiO2NTs. The Ti-S bonding effect between ternary sulfide solid solution and TiO2NTs can give rise to the red shift of the absorption edges of the samples and the extent of the red shift is increased with the improvement of the Ti-S bonding effect. Among Cu2+, Ag+ and Ni2+ doped samples, the red-shift extent of the absorption edge is increased in turn.

Interface bonding effect between ternary sulfide solid solution and TiO2NTs composite by solvothermal synthesis

249th National Meeting (2015)

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