Rational Design of ZnFe2O4/In2O3 Nanoheterostructures: Efficient Photocatalyst for Gaseous 1,2-Dichlorobenzene Degradation and Mechanistic Insight
Rational Design of ZnFe2O4/In2O3 Nanoheterostructures: Efficient Photocatalyst for Gaseous 1,2-Dichlorobenzene Degradation and Mechanistic Insight
复制标题
ZnFe2O4/In2O3 纳米异质结构的合理设计：气态 1,2-二氯苯降解的高效光催化剂及机理洞察
DOI：
10.1021/acssuschemeng.6b00601
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发表时间：
2016
影响因子：
8.4
通讯作者：
Zhang Dongke
中科院分区：
文献类型：
--
作者：
Zhang Fei;Li Xinyong;Zhao Qidong;Zhang Dongke
将ZnFe 2 O 4纳米粒子组装到单分散的In 2 O3纳米球表面，制备了具有可见光催化性能的ZnFe 2 O 4/In 2 O3杂化纳米异质结构，并以气态邻二氯苯（o-DCB）为降解对象，评价了其光催化性能。所得异质结构对o-DCB降解的催化活性高于纯In_2O_3或ZnFe_2O_4。活性增强主要归因于可见光捕获能力的增强、有效的空间分离以及光生电荷寿命的延长。同时，利用原位红外光谱对反应的主要中间产物进行了表征，包括邻苯醌类物质、酚盐类物质、甲酸盐、乙酸盐和马来酸盐。此外，还对ZnFe 2 O 4/In 2 O3纳米异质结构的催化反应机理和·OH的生成途径进行了初步的推测。本文的工作为今后的研究提供了一些有意义的信息。
Novel ZnFe2O4/In2O3 hybrid nanoheterostructures with enhanced visible-light catalytic performance were fabricated by assembling ZnFe2O4 nanoparticles on the surface of monodispersed In2O3 nanospheres, and their photocatalytic performances were evaluated via the degradation of gaseous 1,2-dichlorobenzene (o-DCB). The catalytic activity of the resulting heterostructures for degradation of o-DCB was higher than that of either pure In2O3 or ZnFe2O4. The enhanced activity was mainly ascribed to the enhanced visible-light harvesting ability, efficient spatial separation, and prolonged lifetimes of photogenerated charges. Meanwhile, the main reaction intermediates including o-benzoquinone type species, phenolate species, formates, acetates, and maleates were verified with in situ FTIR spectroscopy. Additionally, a tentative catalytic reaction mechanism and the generation pathway of •OH over the ZnFe2O4/In2O3 nanoheterostructures were postulated. The present work provides some significative information for the er...