| Ag/质子化g-C3N4纳米棒材料的制备及其光催化降解性能 | |
| Preparation and photocatalytic degradation performance of Ag/protonated g-C3N4 nanorod materials | |
| 摘要: 制备了 Ag 负载于质子化 g-C3N4(pCN)的纳米棒材料(Ag/pCN)，对比了 g-C3N4(CN)、表面负载 Ag 的 CN(Ag/CN)、pCN 和 Ag/pCN在可见光条件下光催化降解亚甲蓝(MB)溶液的效果。结果表明，Ag/pCN光催化效率最高(92.63%)，并且具有良好的稳定性；通过光电流-时间(I-t)曲线、Nyquist曲线、Mott-Schokkty曲线和捕获实验探究了Ag/pCN光催化降解MB的机理：虽然pCN的π共轭体系较CN发生变化，但由于形成了纳米棒，其比表面积的增加以及Ag负载的协同效应致使Ag/pCN具有优异的光催化性能。光催化过程中羟基自由基(·OH)是起主要作用的活性物质，其由光生电子(e-)与表面吸附的 O2反应产生以及光生空穴(h+)与H2O或OH-反应产生。 | |
| 关键词: Ag 质子化 g-C3N4 光催化降解 | |
| 基金项目: 黑龙江省高校教师基本科研业务费(No.135509106)资助。 | |
| Abstract: Protonated g-C3N4 nanorod loaded with Ag (Ag/pCN) materials were prepared. The photocatalytic degradation of methylene blue (MB) solution was compared between g-C3N4 (CN), CN loaded with Ag (Ag/CN), pCN, and Ag/pCN under visible light. Ag/pCN had the highest photocatalytic efficiency of 92.63% and exhibited good stability. The mechanism of photocatalytic degradation of MB by Ag/pCN was investigated through the photocurrent-time (I-t) curve, Nyquist curve, Mott-Schokkty curve, and capture experiment. Although the π conjugated system of pCN was disrupted, the synergistic effect of forming nanorods, increasing specific surface area, and loading Ag resulted in the excellent photocatalytic performance of Ag/pCN. Hydroxyl radicals (·OH) are the main active substances in the photocatalytic process. The active substance ·OH is produced by the reaction of photo-generated electrons (e-) with O2, as well as photo-generated holes (h+) with H2O or OH-. | |
| Keywords: Ag protonation g-C3N4 photocatalytic degradation | |
| 投稿时间：2024-03-19 修订日期：2024-06-28 | |
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| 殷广明,王怀尧,郑建华,董鑫月,李健,孙轶男,高一铭,王兵兵.Ag/质子化g-C3N4纳米棒材料的制备及其光催化降解性能[J].无机化学学报,2024,40(8):1491-1500. | |
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