Tailored design of high-stability CoMn1.5Ox@TiO2 double-wall nanocages derived from Prussian blue analogue for catalytic combustion of o-dichlorobenzene
Tailored design of high-stability CoMn1.5Ox@TiO2 double-wall nanocages derived from Prussian blue analogue for catalytic combustion of o-dichlorobenzene
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源自普鲁士蓝类似物的高稳定性CoMn1.5Ox@TiO2双壁纳米笼的定制设计，用于邻二氯苯的催化燃烧
DOI：
10.1016/j.apcatb.2020.119133
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Tang Zhicheng
中科院分区：
文献类型：
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作者：
Zhao Haijun;Han Weiliang;Tang Zhicheng
通过对Mn 3 [Co（CN）6]2. nH2O@TiO 2核壳结构进行退火处理，制备了CoMn 1. 5Ox@TiO 2双壁纳米笼，并将其用于邻二氯苯（o-DCB）的催化燃烧反应。通过控制PVP的用量可以调节Mn 3 [Co（CN）6]2·nH 2 O纳米立方体的尺寸，通过Ti的含量可以调节TiO 2壳层的厚度。通过构建CoMn 1. 5Ox@TiO2双壁纳米笼链状催化剂，大大提高了CoMn氧化物催化剂的比表面积、酸性和氧化还原性能、催化活性和稳定性。CoMn600@0. 5 Ti对o-DCB的破坏活性最高，其T50为341 ℃，T90为392 ℃，这是由于TiO 2壳层厚度效应和CoMn 1. 5 Ox与TiO 2之间的协同效应所致。由于TiO 2壳层对CoMn1.5Oxcore的保护作用，CoMn600@1.0Ti在1500 min内表现出持久的稳定性。结合TPSR-MS、原位FTIR和催化剂性能研究，结合活性氧源提出了可能的反应机理，包括MvK和L-H模型。
Double–wall nanocages of CoMn1.5Ox@TiO2were constructed via annealing Mn3[Co(CN)6]2·nH2O@TiO2core–shell structure, which were evaluated for the catalytic combustion reaction of o–dichlorobenzene (o–DCB). The size of Mn3[Co(CN)6]2·nH2O nanocubes was adjusted by controlling the amount of PVP and the thickness of TiO2shell was regulated by the Ti content. The specific surface area, acid and redox properties, catalytic activity and stability of CoMn oxide catalysts were greatly improved by establishing chainmail catalyst of CoMn1.5Ox@TiO2double–wall nanocages. The CoMn600@0.5Ti exhibited the optimum destruction activity of o–DCB with T50of 341○C and T90of 392○C because of the thickness effect of TiO2shell and synergistic effect between CoMn1.5Oxand TiO2. CoMn600@1.0Ti with 79 nm thickness of TiO2shell exhibited durable stability in 1500 min due to the chainmail protective role of TiO2shell on CoMn1.5Oxcore. A possible reaction mechanism involving MvK and L–H model was proposed according to the active oxygen source based on TPSR-MS, in–situ FTIR, and catalytic performance studies.