研究目的
To enhance the visible-light photocatalytic activity of TiO2 nanotubes by modifying them with WS2 nanodots.
研究成果
TNT/WND composites were prepared by situ growing WS2 nanodots on the inner wall of TiO2 nanotube through hydrothermal method. The as-prepared TNT/WND composites exhibit superior activity toward photodegradation of RhB under visible light. The enhanced photocatalytic activity is ascribed to its high specific surface area and relative low recombination rate of electron-hole pairs resulted from firm heterojunction between TiO2 nanotubes and WS2 nanodots.
研究不足
The study does not discuss the long-term stability of the TNT/WND composites under continuous photocatalytic operation or their performance under different environmental conditions.
1：Experimental Design and Method Selection:
A one-pot hydrothermal method was used to synthesize WS2 nanodots-modified TiO2 nanotubes (TNT/WND) composites with sodium tungstate and L-cysteine as WS2 precursor source and TiO2 nanotubes as substrate.
2：Sample Selection and Data Sources:
TiO2 nanotubes were prepared by a facile hydrothermal process.
3：List of Experimental Equipment and Materials:
X-ray diffraction (XRD), Transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), UV–vis spectrophotometer, and Photoluminescence spectra (PL) were used.
4：Experimental Procedures and Operational Workflow:
The mixture was transferred into a Te?on-lined stainless steel autoclave and reacted at 200 oC for 24 h.
5：Data Analysis Methods:
The RhB concentration was tested by UV-vis spectroscopy at wavelength 553 nm.
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