嵌入MoOx S-g-C3N4框架,具有增强的光催化H2生成和去除功能
Hongliang Lü1, Webin Shi1, Ping Yang1
1School of Material Science & Engineering, University of Jinan, Jinan, 250022, PR China.
Environmental research
|October 15, 2025
概括
有缺陷的氧化物/硫配合的石墨碳化物 (MoOx/S-g-C3N4) S-方案异质连接被合成用于增强光催化. 这种缺陷工程方法提高了太阳能转化用于生产和污染物降解的速度.
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
- 纳米技术 纳米技术
背景情况:
- 石墨碳化物 (g-C3N4) 是一个有前途的光催化剂,但受到有限的太阳光吸收和电荷载体分离的影响.
- 缺陷工程和异质连接结构是提高光催化性能的有效策略.
研究的目的:
- 为了合成新的MoOx/S-g-C3N4 S模式异质连接与内在缺陷.
- 调查氧气空缺在增强光吸收和电荷转移中的作用.
- 评估用于产生气和降解有机污染物的光催化效率.
主要方法:
- 在S-doped g-C3N4上通过二次热聚合,缺陷的MoOx在现场生长.
- 机械化学预处理,使前体分布均.
- 优化热聚合温度的优化.
- 对H2进化和2,4-二二醇降解进行光催化活性测试.
主要成果:
- 成功合成了MoOx/S-g-C3N4 S模式异质连接,并具有完善的接口.
- 在MoOx中形成氧气空缺,延长了对近红外区域的光响应.
- 实现了光催化H2生成速率为3874μmolg-1h-1 ,与S-g-C3N4相比增加了7倍.
- 证明2,4-二二醇降解动力速率 (k=0.018) 是S-g-C3N4的6倍.
结论:
- 合成的MoOx/S-g-C3N4 S方案异质连接由于缺陷工程和改进的电荷转移,显著增强了光催化活性.
- 氧气空缺在扩大光吸收和优化电荷转移通路方面发挥着至关重要的作用.
- 这项工作为设计用于绿色能源转换和环境修复的先进光催化剂提供了有效的策略.
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