研究目的
To synthesize CuOx-TiO2 composites by different methods and evaluate their photocatalytic activity for solar water splitting under one sun condition, aiming to understand the correlation between synthesis method and activity, and the mechanism of water splitting.
研究成果
The photocatalyst prepared by photodeposition method shows the best activity for hydrogen production from aqueous methanol solution and with pure water under one sun condition, due to the presence of Cu in Cu/Cu + 1 form and the formation of p-n (Cu2O-TiO2) heterojunction at the interface.
研究不足
The study highlights the challenge of maintaining the required form of Cu under photocatalysis conditions and the potential for CuO formation to decrease activity with certain preparation methods.
1：Experimental Design and Method Selection:
CuOx-TiO2 composites were prepared by impregnation, microwave reduction, and photodeposition methods.
2：Sample Selection and Data Sources:
The composites were evaluated for photocatalytic activity towards hydrogen generation under one sun condition with aqueous methanol solution.
3：List of Experimental Equipment and Materials:
TEM, HRTEM, Raman spectroscopy, UV-Visible absorption spectroscopy, XRD, XPS, and photoluminescence spectroscopy were used for characterization.
4：Experimental Procedures and Operational Workflow:
The photocatalytic activity was measured for hydrogen production from aqueous methanol solution and pure water under one sun condition.
5：Data Analysis Methods:
The hydrogen production activity was compared among the composites prepared by different methods.
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