分层双氧化物作为高效的光催化剂,用于从水中产生可见光氧气
Cláudia Gomes Silva1, Younès Bouizi, Vicente Fornés
1Instituto de Tecnologia Quimica, UPV-CSIC, Universidad Politecnica de Valencia, Avda. de Los Naranjos s/n, 46022 Valencia, Spain.
Journal of the American Chemical Society
|September 4, 2009
概括
研究人员开发了基于的新型分层双氧化物 (LDH),用于高效的可见光光催化氧生成. 最活跃的 (Zn/Cr) LDH 材料表现出高量子产量,性能优于传统材料,如 WO...3).
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
- 可再生能源可再生能源是可再生能源.
背景情况:
- 在可见光下,光催化水的分裂用于在可见光下产生氧气仍然是一个重大挑战.
- 层状双氧化物 (LDH) 为催化应用提供可调节的特性.
研究的目的:
- 为了合成和评估Zn/Ti,Zn/Ce和Zn/Cr分层的双氧化物 (LDH),用于可见光光触媒氧气生成.
- 为了确定最佳的组成和结构,以提高氧气演变效率.
主要方法:
- 一系列具有不同 Zn/金属原子比的 LDH 材料的合成.
- 在可见光照射下测试光催化活性.
- 使用铁氧沙酸盐作为化学行为计来确定表面量子产量.
主要成果:
- 具有4:2原子比的 (Zn/Cr) LDH表现出最高的光催化活性.
- 这种材料在410nm和570nm显示可见光吸收带.
- 在410nm和570nm分别实现了60.9%和12.2%的表面量子产量.
- 效率随着含量而异常增加.
- 总体效率是 WO 的 1.6 倍.
结论:
- 含的分层双氧化物是可见光驱动氧气生成的有希望的材料.
- 合成的 (Zn/Cr) LDH 材料可以在没有光收获染料的情况下实现高量子效率.
- 这些发现有助于开发用于可持续能源应用的先进光催化剂.
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