文献类型：期刊文献

英文题名：Shielding metal sites of Cu-BTC to achieve reversed benzene/vinyl acetate selectivity for trace benzene removal

作者：Jiang, Hao[1,2,3];Qiu, Pengyuan[4];Liu, Chuanlei[1,2,3];Zhang, Chenyu[1,2,3];Yang, Yunxin[4];Wu, Qiumin[1,2,3];Zhang, Yuning[5];Sun, Hui[1,2,3,6]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Shanghai 200237, Peoples R China;[4]SINOPEC Shanghai Res Inst Petrochem Technol Co Ltd, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 201208, Peoples R China;[5]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab Ultra intense Laser Sci & Technol, Shanghai 201800, Peoples R China;[6]Xinjiang Univ, Sch Chem Engn & Technol, Minist Key Lab Oil & Gas Fine Chem, Urumqi, Peoples R China

年份：2026

卷号：72

期号：1

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20253719152196);WOS:【SCI-EXPANDED(收录号:WOS:001562962300001)】；

基金：National Natural Science Foundation of China, Grant/Award Numbers: 22178109, 21878097; Key R&D Project in Xinjiang Uygur Autonomous Region, Grant/Award Number: 2024B01018; SINOPEC Corp., Grant/Award Number: 224176

语种：英文

外文关键词：adsorptive removal; benzene/vinyl acetate selectivity; Cu-BTC; glycine grafting; ligand fragmentation

摘要：Removal of trace benzene (Bz) is critical for ensuring extensive applications of vinyl acetate (VA), however, is challenging due to the specific properties of this binary mixture. This study presents an "exposure + shielding" modification strategy for Cu-BTC, involving acetic acid fragmentation and glycine grafting, to enhance the contribution of ligands in Bz adsorption. Comprehensive characterizations confirm the structural integrity and tailored porosity of modified adsorbents. Compared to pristine Cu-BTC, Gly(1.00)@Ac/Cu-BTC demonstrates a 69.7% increase in static uptake and nearly twofold improvement in breakthrough capacity. Gly(1.00)@Ac/Cu-BTC also exhibits superior thermal stability (up to 583 K) and chemical stability in VA, with no decomposition after 30 days. DFT calculations reveal a reversed Bz/VA selectivity, driven by enhanced pi-complexation and effective shielding of Cu sites. This work represents the first example to achieve the practical Bz/VA separation, and highlights the potential of synergistic modifications in designing efficient, stable MOFs for industrial separations.