研究目的
To enhance the efficiency of photocatalytic hydrogen production by promoting the separation of photo-generated carriers through the preparation of a g-C3N4/CeCO3OH/CeO2 ternary nanocomposite.
研究成果
The prepared CeCeCN composite shows a large HPR of 38.2 μmol h-1 (764 μmol h-1 g-1), which is over 11 times larger than HPRs of g-C3N4 and CeO2. The CeCeCN composite exhibits a larger photo-response current density and a lower charge-transfer resistance than pure g-C3N4 and CeO2. And the composite exhibits high stability after four repetition cycles. These improved photocatalytic activities are ascribed primarily to the heterostructure in the CeCeCN ternary composite, which can suppress the recombination of photo-generated carriers and liberate more excited electrons for efficient hydrogen production under sunlight.
研究不足
The study focuses on the enhancement of photocatalytic hydrogen production using a specific ternary nanocomposite. The scalability and cost-effectiveness of the synthesis method, as well as the long-term stability of the composite under operational conditions, are potential areas for further investigation.
1：Experimental Design and Method Selection
The CeCeCN composite was prepared via an easy synthetic way using g-C3N4 and CeO2 as reactants. A CeCO3OH layer was formed, resulting in the novel ternary photocatalyst.
2：Sample Selection and Data Sources
Pure g-C3N4 and CeO2 were used as reactants. The samples were characterized using SEM, TEM, XRD, XPS, UV-VIS absorption spectra, PL spectra, TRPL spectra, and photocatalytic H2 evolution tests.
3：List of Experimental Equipment and Materials
Cerium dioxide (CeO2, Aladdin, 99.9%), melamine (Macklin, 99%), thioacetamide (TAA, Aladdin, 99%), isopropanol (Aladdin, 99.5%), sodium sulfate anhydrous (Na2SO4, Aladdin, 99%), triethanolamine (TEOA, Aladdin, 98%), nafion perfluorinated resin solution (5 wt%), and fluorine-doped tin oxide (FTO).
4：Experimental Procedures and Operational Workflow
The CeCeCN composite was prepared by a one-pot hydrothermal way. The samples were characterized using various techniques to investigate their morphology, composition, optical absorption, and photocatalytic performance.
5：Data Analysis Methods
The data were analyzed using various techniques including SEM, TEM, XRD, XPS, UV-VIS absorption spectra, PL spectra, TRPL spectra, and photocatalytic H2 evolution tests.
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