基于的双功能共催化剂来增强CdS光催化生产
Haoyu Chen1, Kun Ye1, Wenya Zhang1
1School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China.
Langmuir : the ACS journal of surfaces and colloids
|December 14, 2023
概括
基于的催化剂显著提高了CdS光催化的生产. Ni-CdS-10实现了比Pt-CdS高1.8倍的效率,证明了光捕获和载体分离的改进,从而实现了高效的水分离.
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:
- 纳米复合材料对于光催化水分裂中的光捕获系统至关重要.
- 基于CdS的材料对的进化有希望,但需要提高效率和稳定性.
研究的目的:
- 为了合成CdS纳米花被基双功能催化剂 (Ni/Ni(OH) 2) 修饰,使用in situ光沉积方法.
- 为了研究催化剂加载对光催化演化效率的影响.
- 阐明增强性能背后的机制.
主要方法:
- 在现场的光沉积用于合成Ni/Ni(OH) 2修饰的CdS纳米花.
- 使用紫外线对DRS,光发光,Mott-Schottky图,线性扫描电压测量和电化学阻抗光谱学进行表征.
- 密度函数理论 (DFT) 计算以了解反应机制.
主要成果:
- / (OH) 2共催化剂显著提高了CdS的光催化演化效率.
- Ni-CdS-10表现出最高的活动 (30.51 mmol g-1 h-1),比Pt-CdS高1.8倍,比纯CdS高2.6倍.
- 在Ni(OH) 2 / CdS p-n连接处的一个内在电场促进了载电荷的运输和分离.
- 和 (OH) 2减少了吸附,减少了吉布斯的自由能量和超电位,改善了稳定性并降低了成本.
结论:
- 开发的Ni/Ni(OH) 2-CdS纳米复合材料是生产的高效和稳定的光催化剂.
- 双功能催化剂有效地抑制了CdS的光腐蚀.
- 这项研究提供了一种具有成本效益的方法,用于生产高效的光催化剂,用于水分解.
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