研究目的
To enhance the photocatalytic activity of TiO2 under UV/visible and visible light irradiation for environmental applications through doping with nitrogen, silicon, or selenium and a dry-co-grinding process.
研究成果
The dry-co-grinding process over doped TiO2 photocatalysts synthesized by the integrated sol-gel and solvothermal method led to materials with enhanced photocatalytic activity under UV/visible and visible light irradiation, attributed to higher specific surface area, reduced band gap, and improved visible light absorption.
研究不足
The study focused on the photocatalytic degradation of phenol under UV/visible and visible light irradiation, and the effects of doping and grinding on TiO2 properties. Potential limitations include the scalability of the synthesis and grinding processes and the applicability to other pollutants.
1：Experimental Design and Method Selection:
The study used an integrated sol-gel and solvothermal method for synthesizing doped TiO2 with short crystallization time and low temperature, followed by a dry-co-grinding process to enhance photocatalytic activity.
2：Sample Selection and Data Sources:
TiO2 was doped with N, Si, or Se using precursors like urea, tetraethyl orthosilicate, and selenium dioxide.
3：List of Experimental Equipment and Materials:
Equipment included a Fritsch Planetary Mill PULVERISETTE 5/2 for grinding, and materials included titanium tetraisopropoxide, 2-propanol, hydrochloric acid, among others.
4：Experimental Procedures and Operational Workflow:
The synthesis involved hydrolysis, crystallization, and drying processes, followed by characterization and photocatalytic activity evaluation.
5：Data Analysis Methods:
Characterization techniques included XRD, Raman, BET, XRF, SEM, TEM, FTIR-ATR, and UV/vis-DRS analyses.
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