S-Scheme CuMn2O4/g-C3N4异质结:有机污染物光降解潜力的制备、表征和研究

IF 5.7 3区 环境科学与生态学 Q1 WATER RESOURCES
Masoumeh Yaqoubi, Masoud Salavati-Niasari, Mojgan Ghanbari
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引用次数: 0

摘要

设计和构建具有合适的界面接触和交错能带结构的异质结光催化剂可以获得优异的光催化性能。采用简单的两步法制备了由铜锰氧化物(CuMn2O4)和g-C3N4组成的无机/有机杂化纳米复合材料。采用多种技术对CuMn2O4/g-C3N4杂化异质结构进行了表征。CuMn2O4/g-C3N4(0.2:1)在可见光下90 min内有效破坏91%的红素(10 ppm),性能优于CuMn2O4和g-C3N4,且具有优越的稳定性。在纳米复合材料上参与红酶光催化分解的主要反应物质是光生成的超氧离子自由基。研究结果提出了一种通过纳米复合材料光催化降解红血酶的机制。基于实验数据,提出了一个独特的s格式模型来解释电荷输运机制。这项工作为创造用于环境和相关应用的创新步进式光催化剂提供了一种直接的方法。本研究表明,CuMn2O4和g-C3N4复合材料在光催化降解染料方面具有很大的应用潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
S-Scheme CuMn2O4/g-C3N4 heterojunction: fabrication, characterization, and investigation of photodegradation potential of organic pollutants

Outstanding photocatalytic performance can be achieved by designing and building heterojunction photocatalysts with a suitable interfacial contact and staggered energy band structure. A simple two-step technique was used to manufacture hybrid inorganic/organic nanocomposites made of copper manganese oxide (CuMn2O4) and g-C3N4. Multiple techniques were employed to characterize the hybridized CuMn2O4/g-C3N4 heterostructure. CuMn2O4/g-C3N4 (0.2:1) efficiently destroyed 91% of erythrosine (10 ppm) below visible lamp in 90 min, being better than the performance of both CuMn2O4 and g-C3N4 and has superior stability. The primary reactive species involved in the photocatalytic breakdown of erythrosine over the nanocomposite were photogenerated superoxide ion radicals. The research results led to the proposal of a photocatalytic mechanism via the nanocomposite for the degradation of erythrosine. Based on the experimental data, a unique S-scheme model was presented to illuminate the charge transport mechanism. This work offers a straightforward method for creating innovative step-scheme photocatalysts for environmental and associated applications. This study revealed that the combination of CuMn2O4 and g-C3N4 as composites shows great potential for efficient photocatalytic dye degradation applications.

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来源期刊
Applied Water Science
Applied Water Science WATER RESOURCES-
CiteScore
9.90
自引率
3.60%
发文量
268
审稿时长
13 weeks
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