Abstract: In this work, g-C3N4/M-foam monolithic photocatalyst was prepared via an impregnation method, which metal foam (M-foam, M=Ni, Cu and Fe) works as supporter. Three different monolithic photocatalysts have been studied systematically for the load stability as well as photocatalytic performance, which revealed that Ni-foam is the best candidate for monolithic photocatalyst formation. The g-C3N4/Ni-foam monolithic photocatalysts exhibited a 1.8 times higher NO removal ratio than powder g-C3N4, indicating the improvement of photocatalytic performance after introduction of Ni-foam. Moreover, by studying the structure, morphology, optical properties and reactive species of g-C3N4/Ni-foam, it is found that the enhancement of photocatalytic performance of g-C3N4/Ni-foam is mainly attributed to the following two reasons: Firstly, the porous structure of Ni-foam can enlarge the dispersibility and provide more active sites for photocatalytic reaction, enhancing the adsorption capacity and photo-degradation efficiency of NO on the surface of g-C3N4; Secondly, the Ni-foam exhibited excellent electron transfer property which can strictly restrict the recombination efficiency of electron-hole pairs. Notably, in this system, superoxide radicals (·O2-) and hydroxyl radicals (·OH) were considered to be the main active species for photo-oxidation of NO to NO3-under illumination over g-C3N4/Ni-foam. This work provide a fresh insight for highly efficient performance and practical application of powder photocatalyst.
冉涛, 张骞, 黎邦鑫, 刘旸, 李筠连. g-C3N4/泡沫镍整体式光催化剂的构建及光氧化去除NO[J]. 材料导报, 2019, 33(z1): 337-342.
RAN Tao, ZHANG Qian, LI Bangxin, LIU Yang, LI Junlian. Construction of g-C3N4/Ni-foam Monolithic Photocatalyst and Removal of NO by Photo-oxidation. Materials Reports, 2019, 33(z1): 337-342.
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2019, Vol. 33 
