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Z-Scheme BiVO₄/g-C₃N₄光催化剂 - 有或没有电子介质?

Tomasz Łęcki¹, Kamila Zarębska^1,2, Ewelina Wierzyńska¹

¹Faculty of Chemistry, University of Warsaw, Pasteur 1, 02-093 Warsaw, Poland.

Molecules (Basel, Switzerland)

|November 9, 2024

概括

BiVO₄/g-C₃N₄光催化剂通过II型异构连接机制工作. 引入诸如金纳米颗粒之类的介质,便于Z模式机制,增强咖啡因降解.

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
环境化学环境化学

背景情况:

乙瓦纳酸 (BiVO₄) 和石墨碳化物 (g-C₃N₄) 由于它们的带排列,形成了一个有前途的混合光催化剂.
在BiVO₄/g-C₃N₄接口上的电荷载体分离机制仍在争论中 (带对带与Z模式).

研究的目的:

要阐明BiVO₄/g-C₃N₄接口上的电荷载体分离机制.
研究介质对光催化机制和效率的影响.
为了评估咖啡因 (CAF) 的光催化降解.

主要方法:

具有和没有各种介质的比较光催化研究 (Au纳米粒子,烯衍生物,Fe3+/Fe2+).
时间解析光发光 (TRPL) 用于电荷转移动态.
强度调制的光电流谱学 (IMPS) 用于表面重组分析.

主要成果:

BiVO₄/g-C₃N₄接口表现出用于电荷载体分离的II型异质连接机制.
在BiVO₄和g-C₃N₄之间结合中间体,可以诱导Z模式机制.
在Fe3+的存在下,BiVO₄/Au/g-C₃N₄系统对咖啡因降解产生了显著的协同效应.

结论:

在BiVO₄/g-C₃N₄混合动力中的电荷分离机制可以通过中间体的整合来调节.
介导Z模式系统显著增强光催化活性,咖啡因降解证明了这一点.

关键词:

一个IMPS的IMPS是一个IMPS.在 TPRL 中使用.这就是Z计划.复合材料是一种复合材料.光催化作用的光催化作用污染物的降解降解污染物降解

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