| MoS2/Ag/g-C3N4 Z型异质结的制备及其光催化性能 |
| MoS2/Ag/g-C3N4 Z-scheme heterojunction: Preparation and photocatalytic performance |
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| 摘要: 通过水热合成法制备了MoS2/Ag/g-C3N4复合光催化剂，并采用一系列分析方法对其进行了系统表征。结果表明，催化剂催化降解活性的显著提高得益于Z型异质结的形成，其有效地促进了光生载流子的传输和分离，抑制了光生电子-空穴对的复合。降解实验结果表明，所制备的复合材料在120 min内对罗丹明B (RhB)的降解率高达98%，光催化性能优于单一光催化剂。此外，捕获实验和电子顺磁共振(EPR)结果表明，超氧自由基(·O2-)和光生空穴(h+)是光催化降解RhB的关键活性物质。最后，对复合材料的光催化降解机制进行了深入探讨。 |
| 关键词: MoS2/Ag/g-C3N4 异质结 光催化降解 降解机理 |
| 基金项目: 淮南师范学院校级项目(No.2022XJYB032，2022HX64)资助。 |
| Abstract: MoS2/Ag/g-C3N4 composite photocatalysts were prepared via hydrothermal synthesis, and a series of analytical methods were employed for systematic characterization. The results indicate that the significant enhancement in catalytic degradation activity is attributed to the formation of Z-scheme heterojunction, which effectively facilitates the transport and separation of photogenerated charge carriers while suppressing the recombination of photogenerated electron and hole pairs. Degradation experiments demonstrated that the prepared composite material achieved a degradation rate of up to 98% for rhodamine B (RhB) within 120 min, exhibiting superior photocatalytic performance compared to individual photocatalysts. Furthermore, capture experiments and electron paramagnetic resonance (EPR) results revealed that superoxide radicals (·O2-) and photogenerated holes (h+) were the key active species in the photocatalytic degradation of RhB. Finally, an iN-depth discussion of the photocatalytic degradation mechanism of the composite material was conducted. |
| Keywords: MoS2/Ag/g-C3N4 heterojunction photocatalytic degradation degradation mechanism |
| 投稿时间：2024-04-28 修订日期：2025-03-02 |
| 摘要点击次数: 324 |
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| 刘庆旺.MoS2/Ag/g-C3N4 Z型异质结的制备及其光催化性能[J].无机化学学报,2025,41(4):821-832. |
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