| 张茜,梁海欧,李春萍,白杰.化学通报,2022,85(12):1475-1482. |
| g-C3N4/CeO2异质结材料的制备及其光催化性能的研究 |
| Preparation and Photocatalytic Properties of g-C3N4/CeO2 Heterojunction |
| 投稿时间：2022-04-04 修订日期：2022-04-28 |
| DOI： |
| 中文关键词: g-C3N4-CeO2 异质结 光催化 TC |
| 英文关键词:g-C3N4-CeO2, Heterojunction, Photocatalytic, TC |
| 基金项目:国家自然科学基金项目(51772158)资助 |
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| 中文摘要: |
| 以三聚氰胺,硝酸铈等为原料,通过高温煅烧法制备了不同CeO2含量的片层状的g-C3N4/CeO2,通过XRD, FT-IR,XPS,UV-Vis DRS等对系列g-C3N4-CeO2材料进行了表征,考察了材料在可见光下(λ≥420nm)条件下降解盐酸四环素(TC)的光催化活性。与单纯的g-C3N4相比,g-C3N4/CeO2-30%具有更优异的光催化性能,这是由于g-C3N4-CeO2间的异质结作用促进了光生电子和空穴分离,同时复合材料增大的比表面积可以提供更多的反应位点。自由基捕获实验证实了.O2-在催化反应过程中起到主要作用,并提出了相应的光催化机理。 |
| 英文摘要: |
| Using melamine, cerium nitrate, etc. as raw materials, lamellar g-C3N4/CeO2 with different CeO2 contents were prepared by high temperature calcination. The g-C3N4/CeO2 materials were characterized by XRD, FT-IR, XPS, UV-Vis DRS, etc. The photocatalytic activity of the material for degrading tetracycline hydrochloride (TC) under visible light (λ≥420 nm) was investigated. Compared with pure g-C3N4, g-C3N4/CeO2-30% has more excellent photocatalytic performance, which is due to the heterojunction between g-C3N4-CeO2 which promotes the separation of photogenerated electrons and holes, At the same time, the increased specific surface area of the composite can provide more reaction sites. Radical trapping experiments confirmed that .O2- played a major role in the catalytic reaction process, and the corresponding photocatalytic mechanism was proposed. |
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