Na 和 S 联合化碳化物用于增强光催化过氧化生产
Xingru Chen1, Longhui Nie1, Xueling Li1
1School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, China.
Chemistry, an Asian journal
|November 11, 2025
概括
和硫联合化碳化物 (CNNS) 光催化剂被合成用于增强过氧化 (H2O2) 生产. 优化的CNNS-2.5材料通过优化的氧降解反应路径显著提高了H2O2产量.
科学领域:
- 材料科学 材料科学 材料科学
- 光催化作用的光催化
- 绿色化学 绿色化学
背景情况:
- 石墨碳化物 (g-C3N4,CN) 是一个有前途的可见光驱动光催化剂.
- 兴奋剂CN增强载体分离,光吸收和带结构,以提高性能.
- 开发高效的光催化剂用于生产H2O2对于可持续化学至关重要.
研究的目的:
- 为了合成和表征和硫联合化碳化物 (CNNS-x) 光催化剂.
- 调查 Na 和 S 协同兴奋剂对 H2O2 生产光催化性能的影响.
- 在优化的催化剂上阐明H2O2生成的光催化机制.
主要方法:
- 使用尿素和硫酸盐的一步热聚合.
- 合成的CNNS-x材料的特性.
- 在可见光照射下进行光催化H2O2生产实验.
- 活动物种捕获试验和电子自旋共振 (ESR) 分析.
主要成果:
- 成功制备了Na,S联合化CN (CNNS-x) 光催化剂.
- CNNS-x表现出增强的可见光反应,载体分离和氧气吸附.
- 最佳的CNNS-2.5光催化剂实现了H2O2产量为4.85mM (24.25 mmol·g−1·h−1),比原始CN.高4.71倍.
- 催化剂在四个周期中表现出良好的稳定性.
结论:
- 纳和S联合剂有效地优化了g-C3N4在H2O2生产中的电子结构和性能.
- 增强的光催化活性归因于改善可见光利用率和高效的电荷载体分离.
- 该机制涉及两步,单电子氧降解反应 (ORR) 路径.
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