在Ag-CdS上的Z模式异质连接的双硫缺陷工程
Yandong Xu1, Jianjun Liao1, Linlin Zhang1
1Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Ecology and Environment, Hainan University, Haikou 570228, China.
Journal of colloid and interface science
|June 4, 2023
概括
一种新型的空心型Z型异构聚合光催化剂 (Ag-CdS1-x@ZnIn2S4-x) 具有双硫空位,可显著提高利用阳光从水和氧中产生过氧化 (H2O2).
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) 生产为清洁能源和环境解决方案提供了可持续的途径.
- 目前用于生成H2O2的光催化剂效率仍然有限,阻碍了实际应用.
研究的目的:
- 开发一种新的多金属复合硫化物光催化剂,提高H2O2生产效率.
- 为了研究结构-活性关系以提高光催化性能.
主要方法:
- Ag-CdS1-x@ZnIn2S4-x的热水合成,具有空心外Z型异质连接结构和双硫空隙.
- 在可见光照射下材料特性和光催化活性的表征.
- 库特基-勒沃奇图和DFT计算以确定电子转移数和反应路径.
主要成果:
- 合成的Ag-CdS1-x@ZnIn2S4-x表现出高H2O2产量1183.7μmolh-1g-1,与CdS相比增加了6倍.
- 空洞结构,Z型异质连接和双硫空隙增强了光利用,载体分离和活跃站点.
- 电子转移数 (n=1.53) 和DFT计算证实了两电子氧降解到H2O2.2.的选择性.
结论:
- 开发的Ag-CdS1-x@ZnIn2S4-x光催化剂在太阳能驱动的H2O2生产中表现出卓越的性能.
- 双硫空缺对于在O2降解为H2O2.2的两电子降解中实现高选择性至关重要.
- 这项研究为设计用于能源转换应用的先进光催化剂提供了宝贵的见解.
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