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| Ag-P改性g-C3N4的可见光催化活性研究 |
| Study on visible light catalytic activity of Ag-P modified g-C3N4 |
| Received:November 19, 2022 |
| DOI： |
| 中文关键词: 光催化 石墨氮化碳 银 改性 降解 |
| 英文关键词: photocatalysis graphitic carbon nitride silver modification degradation |
| 基金项目:白云鄂博稀土资源研究与综合利用国家重点实验室联合研究课题(9001/3222016) |
| Author Name | Affiliation | | AI Bing | School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, Shandong, China | | ZHANG Teng | School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, Shandong, China | | MA Zhi | School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, Shandong, China | | ZHAO Jiangsong | School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, Shandong, China | | LI Degang | School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo 255049, Shandong, China |
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| 中文摘要: |
| 以三聚氰胺、磷酸氢二铵和硝酸银为原料，采用热聚合法合成了Ag-P改性的复合可见光催化剂Ag-P/g-C3N4，采用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、荧光光谱(PL)等对Ag-P/g-C3N4催化剂进行了表征与分析。通过Ag-P/g-C3N4存在下亚甲基蓝(MB)的可见光降解实验，系统研究了该类催化剂的可见光催化活性。结果表明，Ag-P复合改性没有明显改变g-C3N4的晶型结构，但是显著抑制了光生电子和空穴的复合，提高了其可见光催化降解活性。经过120 min可见光照射后，Ag(2%)-P/g-C3N4的速率常数达到0.00816 min-1，是原始g-C3N4的2.1倍，是P/g-C3N4的1.7倍。同时，探索了Ag-P/g-C3N4的可见光催化降解反应机制和循环使用稳定性。 |
| 英文摘要: |
| Ag-P/g-C3N4, a composite visible light catalyst modified by Ag-P, was synthesized via the thermal polymerization among melamine, diammonium hydrogen phosphate and silver nitrate. The yielded catalyst was characterized and analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and photoluminescence spectroscopy (PL). The visible light catalytic activity was systematically measured in visible light-triggered degradation experiments of methylene blue The results showed that the modification of Ag-P composite did not significantly change the crystal structure of g-C3N4, but greatly inhibited the recombination of photogenerated electrons and holes, thus improving its visible light catalytic activity. After 120 min of visible light irradiation, the rate constant of degradation catalyzed by Ag(2%)-P/g-C3N4 reached 0.00816 min-1, which was 2.1 times that by the original g-C3N4 and 1.7 times that by P/g-C3N4. In addition, the visible light catalytic degradation mechanism and recycling stability of Ag-P/g-C3N4 were explored. |
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