增强可见光 H2O2 产量超过 Pt/g-C3N4 肖特基交叉点光催化剂
Longhui Nie1, Heng Chen1, Jing Wang1
1School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China.
Inorganic chemistry
|February 27, 2024
概括
这项研究开发了高效的Pt/g-C3N4光催化剂,用于使用可见光产生过氧化 (H2O2). 在没有牺牲剂的情况下,优化的催化剂实现了H2O2产量的2.46倍.
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:
- 光催化过氧化 (H2O2) 生产提供了使用水和氧气的可持续途径.
- 开发高效和稳定的光催化剂对于实际应用至关重要.
- 石墨碳化物 (g-C3N4) 是一个有前途的半导体光催化剂.
研究的目的:
- 为了制造含有超低 (Pt) 的Pt/g-C3N4的Schottky结合光催化剂.
- 调查它们在无牺牲剂的可见光驱动H2O生产中的效率.
- 阐明参与光催化过程的机制和活性物种.
主要方法:
- 使用浸减少方法制造Pt/g-C3N4光催化剂.
- 在可见光下对催化剂性能进行表征和性能评估.
- 使用电子磁共振 (EPR) 识别活性物种和机械学研究.
主要成果:
- 成功合成了Pt/g-C3N4的光催化剂,其Pt含量超低 (0.025-0.1 wt%).
- 最佳的Pt0.05/g-C3N4实现了31.82μM的H2O2产量,比原始g-C3N4高2.46倍.
- 催化剂表现出良好的稳定性,并确定超氧化基 (·O2-) 是主要的活性物种.
结论:
- 在g-C3N4上的超低Pt负载显著提高了光催化H2O2生产效率.
- 增强的性能归因于改进的光生成载体分离和减少H2O2分解.
- 反应机制涉及O2减少到H2O2的两步单电子路径.
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