Two-dimensionalCaO/carbon heterostructures with unprecedented catalytic performance inroom-temperature H2S oxidization
YankaiPan, Mingqi Chen, Zhe Su, Kede Wu, Yayun Zhang*, Donghui Long*
Applied Catalysis B: Environmental, 2021, 280, 119444.
文章链接：https://www.sciencedirect.com/science/article/pii/S0926337320308596
Two-dimensional (2D) carbon-based materialsare attracting increasing interest as promising desulfurizers for tackling H2S emission issues at room temperature. Herein, the 2D CaO/carbonheterostructures are synthesized by a one-step method for H2S catalytic oxidation. Results indicate that the catalysts exhibitrobust catalytic H2S performance with significantpromotions for the generation of active oxygen species and the dissociation ofH2S. Moreover, the roomy and open space created by 2D nanosheetstructure could offer more exposed active sites for desulfurization reactionand larger storehouse for sulfur products compared with porous carbons.Consequently, the breakthrough sulfur capacity of the 2D CaO/carbonheterostructures achieves an unprecedented value of 9.10 g/g. Furthermore, a possible mechanism of H2S catalytic oxidation on the catalysts is proposed based on theexperimental and characteristic results. This work could shed lights on thefacile fabrication of high-capacity catalysts for H2S oxidation and the desulfurization behavior of the 2D carbon-basedmaterials.
