Development of MoS_(2)-stainless steel catalyst by 3D printing for efficient destruction of organics via peroxymonosulfate activation  

作　　者：Yufeng Liu Jianhui Xu Xin Fu Pengxu Wang Dan Li Yunfei Zhang Shenggui Chen Chunhui Zhang Peng Liu 

机构地区：[1]School of Environment and Civil Engineering,Dongguan University of Technology,Dongguan 523808,China [2]School of Art and Design,Guangzhou Panyu Polytechnic,Guangzhou 511483,China [3]Dongguan Institute of Science and Technology Innovation,Dongguan University of Technology,Dongguan 523808,China [4]School of Mechanical Engineering,Dongguan University of Technology,Dongguan 523808,China

出　　处：《Journal of Environmental Sciences》2024年第1期108-117,共10页环境科学学报（英文版）

基　　金：supported by the Guangdong Province Enterprise Science and Technology Commissioner Project (No.GDKTP2021048000);the National Natural Science Foundation of China (No.41907292);the Guangdong Basic and Applied Basic Research Foundation (No.2019A1515110497);the Key-Area Research and Development Program of Guangdong Province (No.2020B090923002);the Guangdong Basic and Applied Basic Research Foundation (No.2019B1515130005)。

摘　　要：Herein,a novel MoS_(2)-stainless steel composite material was first synthetized via a 3D printing method(3DP MoS_(2)-SS)for peroxymonosulfate(PMS)activation and organics degradation.Compared with MoS_(2)-SS powder/PMS system(0.37 g/(m^(2)/min)),4.3-fold higher k_(FLO)/S_(BET)value was obtained in 3DP MoS_(2)-SS/PMS system(1.60 g/(m^(2)/min),resulting from the superior utilization of active sites.We observed that 3DP MoS_(2)-SS significantly outperformed the 3DP SS due to the enhanced electron transfer rate and increased active sites.Moreover,Mo^(4+)facilitated the Fe^(2+)/Fe^(3+)cycle,resulting in the rapid degradation of florfenicol(FLO).Quenching experiments and electron paramagnetic resonance spectra indicated that·OH,SO_(4)·^(-),O_(2)·^(-)and^(1)O_(2)were involved in the degradation of FLO.The effect of influencing factors on the degradation of FLO were evaluated,and the optimized degradation efficiency of 98.69%was achieved at 1 mM PMS and pH of 3.0.Six degradation products were detected by UPLC/MS analyses and several possible degradation pathways were proposed to be the cleavage of C-N bonds,dechlorination,hydrolysis,defluorination and hydroxylation.In addition,3DP MoS_(2)-SS/PMS system also demonstrated superior degradation performance for 2-chlorophenol,acetaminophen,ibuprofen and carbamazepine.This study provided deep insights into the MoS_(2)-SS catalyst prepared by 3DP technology for PMS activation and FLO-polluted water treatment.

关 键 词：3D printing Stainless steel MoS_(2) Peroxymonosulfate activation Degradation mechanism 

分 类 号：X703[环境科学与工程—环境工程] TQ426[化学工程]