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WO₃/MIL-125 (Ti) 复合材料用于增强可见光下Cr的降解

Chunhong Jin¹, Jingchao Liu², Yilin Yin¹

¹Key Laboratory of Environmentally Harmful Chemical Analysis, College of Chemistry, Beijing University of Chemical Technology Beijing 100029 China lizh@mail.buct.edu.cn yinyilin361@163.com.

|February 9, 2024

概括

一种新的复合材料,氧化 (WO3) 和MIL-125 (Ti),有效地减少了废水中的有毒六价 (Cr(VI)). 这种先进的光催化剂显示了环境修复的高效率和稳定性.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学化学化学

背景情况:

六价 (Cr(VI)) 是工业废水中发现的有毒重金属污染物.
氧化 (WO3) 是一个有前途的光催化剂,但它遭受了快速的电子孔重组.
需要有效的方法来从受污染的水源中去除Cr (VI).

研究的目的:

开发一种新型复合材料,用于增强Cr的光催化降解.
为了研究WO3-MIL-125 (Ti) 复合材料的光催化活性和稳定性.
了解复合材料性能提高背后的机制.

主要方法:

使用球磨法制备WO3-MIL-125 (Ti) 复合材料.
在可见光下使用已制备的复合材料进行Cr(VI) 的光催化降解.
复合材料的表征和分析它们的催化性能和在多个循环中的稳定性.

主要成果:

在50分钟内,W90M10复合材料实现了99.2%的Cr (VI) 减少率,比单独的WO3高出2.3倍.
复合催化剂表现出极好的稳定性,在5个循环后保持了91.3%的降低效率.
增强的性能归因于II型异质连接的形成,促进光生成的电子孔分离.

结论:

WO3-MIL-125 (Ti) 复合材料对于光催化降解Cr (VI) 是非常有效的.
第二种类型的异质连接结构显著提高了电荷分离和光催化效率.
这种复合材料为处理受CrVI污染的废水提供了稳定高效的解决方案.

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