Feng Shan-Fang, Deng Si-Ping, Du Jia-Wen, Ma Xiao-Yan, Lu Yu-An, Gao Nai-Yun, Deng Jing
College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China.
College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Huan Jing Ke Xue. 2016 Nov 8;37(11):4247-4254. doi: 10.13227/j.hjkx.201604186.
Three-dimensional ordered mesoporous CoO was prepared by nanocasting method with porous silicon KIT-6 as the hard template and firstly used to activate peroxymonosulfate for the degradation of rhodamine B. The structural properties were characterized by BET, H-TEM, XRD, XPS, FT-IR. The results showed that three-dimensional ordered mesoporous CoO presented far superior catalytic activity over conventional nanoscale CoO due to its abundant space mesoporous channel structure and the large specific surface areas. Higher catalyst dosage and higher peroxymonosulfate concentration favored the decolorization of rhodamine B. The removal of rhodamine B could be accelerated in the presence of Cl and HPO; however, the decolorization of rhodamine B would be inhibited in the presence of NO, SO and HCO. Sulfate radicals were identified as the dominant active species for the decolorization of rhodamine B through radicals quenching experiments. Three-dimensional ordered mesoporous CoO showed excellent catalytic activity even after five consecutive cycles.
采用纳米铸造法，以多孔硅KIT-6为硬模板制备了三维有序介孔CoO，并首次将其用于活化过一硫酸盐以降解罗丹明B。通过BET、高分辨透射电子显微镜（H-TEM）、X射线衍射（XRD）、X射线光电子能谱（XPS）、傅里叶变换红外光谱（FT-IR）对其结构性质进行了表征。结果表明，三维有序介孔CoO由于其丰富的空间介孔通道结构和大比表面积，呈现出比传统纳米级CoO远优越的催化活性。较高的催化剂用量和较高的过一硫酸盐浓度有利于罗丹明B的脱色。在Cl和HPO存在下，罗丹明B的去除可以加速；然而，在NO、SO和HCO存在下，罗丹明B的脱色会受到抑制。通过自由基淬灭实验确定硫酸根自由基是罗丹明B脱色的主要活性物种。三维有序介孔CoO即使在连续五个循环后仍表现出优异的催化活性。
