甲苯
锰
多孔性
退火(玻璃)
尿素
催化作用
材料科学
热液循环
化学工程
分数(化学)
反应性(心理学)
无机化学
化学
有机化学
冶金
复合材料
替代医学
病理
工程类
医学
作者
Minh Tuan Nguyen Dinh,Chinh Chien Nguyen,Tan Linh Truong Vu,Van Thinh Ho,Quang Duc Truong
标识
DOI:10.1016/j.apcata.2020.117473
摘要
3D architectures porous epsilon-type manganese dioxide (ε-MnO2) microcubes (PEMD) are successfully prepared by a glucose-urea-assisted hydrothermal synthesis of MnCO3-carbon composites followed by annealing. It turns out that urea essentially assists in building the cubic shape while glucose plays a crucial role to form carbon inside the microcrystals, which are latterly removed by annealing to generate the porous structure. As a result, ε-MnO2 materials possessing extraordinary features including the high porosity, reducibility, lattice oxygen reactivity and Mn4+ fraction, are feasible tailored. These unique properties, all together, significantly improve the catalytic performances of complete oxidation of toluene. Thus, it is found that the optimal catalyst (manganese-glucose-urea ratio of 6-2-6) synthesized at 180 °C exhibits an excellent activity for the complete oxidation of toluene (T90 = 243 °C, lower 10 °C than that of pristine ε-MnO2) and stability up to 10 h.
科研通智能强力驱动
Strongly Powered by AbleSci AI