3D-hierarchically structured Co3O4/graphene hydrogel for catalytic oxidation of Orange II solutions by activation of peroxymonosulfate

作者：Duan, Lixuan; Zhou, Xuejun; Liu, Siting; Shi, Penghui^*; Yao, Weifeng^*

来源：Journal of the Taiwan Institute of Chemical Engineers, 2017, 76: 101-108.

DOI：10.1016/j.jtice.2017.04.019

• Graphene hydrogel
• Cobalt oxide
• Advanced oxidation processes
• Peroxymonosulfate
• Orange II

We report a 3D-hierarchically Co3O4/graphene hydrogel (CGH) composite as a catalyst activator of peroxymonosulfate (PMS) for sulfate radical-based degradation of Orange II in a heterogeneous system. The physicochemical performance of the composite is analyzed by X-ray diffraction spectra, scanning electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The results demonstrate that the samples are prepared resoundingly. The CGH hybrid composite completely removes Orange II wastewater within 6 min; furthermore, after five runs, the catalyst activity remains essentially unchanged and the macrostructure is followed consistently. This unusual macrostructure hydrogel of supported cobalt oxide indicates a high feasibility of commercial promotion to remove the azo dye.

• 出版日期2017-7
• 单位上海电力大学