文献类型：期刊文献

英文题名：Efficiently activate peroxymonosulfate by Fe3O4@MoS2 for rapid degradation of sulfonamides

作者：Lu, Jian[1];Zhou, Yi[1];Zhou, Yanbo[1,2]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Natl Engn Lab Ind Wastewater Treatment, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2021

卷号：422

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20212310455955);WOS:【SCI-EXPANDED(收录号:WOS:000672572000002)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 51778230, 21906056) , Program of Shanghai Outstanding Technology Leaders (Grant No. 20XD1433900) , the National Key Research and Development Program of China (Grant No. 2017YFB0602601) , and Shanghai Sailing Program (19YF1411900) .

语种：英文

外文关键词：Peroxymonosulfate; Fe3O4; MoS2; Emerging pollutants

摘要：By coating with MoS2 on the surface of Fe3O4 nanoparticles, a series of Fe3O4@MoS2-X catalysts were successfully synthesized to activate peroxymonosulfate (PMS) for sulfonamides (SA) degradation. Owing to the highly active Mo(IV) could efficiently improve the Fe(II)/Fe(III) cycle, the activity of the heterogeneous reaction was significantly enhanced. Compared with Fe3O4/PMS system, the degradation efficiency of SA in Fe3O4@MoS2-3/PMS system was improved by 4 times and the degradation kinetic rate was improved by 86 times. In addition to SA, Fe3O4@MoS2-3/PMS system also showed high efficiency in treating other representative emerging pollutants (phenols, endocrine disrupting chemicals, drugs or antibiotics). Fe3O4@MoS2-3/PMS is a system in which Fe3O4 and MoS2 are both active components. The main active free radical in Fe3O4@MoS2-3/PMS system is SO4 center dot-, the generation of HO center dot may be suppressed after coating MoS2. Meanwhile, exposed Mo(IV) on the surface of MoS2 participates in the reduction of Fe(III) and further promotes the reaction rate. Furthermore, Mo(VI) participates in the generation of non-radical O-1(2) which is also an important reactive oxygen species in the system. Fe3O4@MoS2-3 could be applied in a wide initial pH range (3.0 similar to 9.0). Anions (Cl-, NO3- and SO42-) and natural organic matter (humic acid, HA) had little effect on the degradation efficiencies of Fe3O4@MoS2-3. This study provides theoretical and experimental basis for the development and utilization of Fenton-like reaction catalysts.