文献类型：期刊文献

英文题名：A solvent-free, one-step synthesis of sulfonic acid group-functionalized mesoporous organosilica with ultra-high acid concentrations and excellent catalytic activities

作者：Wu, Qin[1,2];Liu, Fujian[1,2];Yi, Xianfeng[3];Zou, Yongcun[4];Jiang, Lilong[1]

机构：[1]Fuzhou Univ, Sch Chem Engn, NERC CFC, Gongye Rd 523, Fuzhou 350002, Fujian, Peoples R China;[2]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China;[3]Chinese Acad Sci, Wuhan Inst Phys & Math, Natl Ctr Magnet Resonance Wuhan,Key Lab Magnet Re, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China;[4]Jilin Univ, Dept Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun, Jilin, Peoples R China

年份：2018

卷号：20

期号：5

起止页码：1020

外文期刊名：GREEN CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000428850200010)、、Scopus(收录号：2-s2.0-85042925087)、WOS

基金：This study was supported by the National Natural Science Foundation of China (21573150, 21203122, U1662108, 21473244, and 11575117), and Natural Science Foundation of Zhejiang Province (LY15B030002).

语种：英文

外文摘要：We demonstrate herein a novel solvent-free technique for the synthesis of sulfonic acid group-functionalized mesoporous organosilica, which was achieved from the self-assembly of a block copolymer template using mercaptopropyltrimethoxysilane (MPTS) and tetramethoxysilane (TMOS) under melting conditions without using additional solvents and subsequent condensation at high temperature (up to 140 degrees C). The resultant samples were designated as SMS-xs, where x stands for molar ratio of MPTS/(MPTS + TMOS). SMS-xs have relatively large BET surface areas, highly cross-linked frameworks, and abundant and uniform mesopores with wormhole-like characteristics. Interestingly, MPTS could be used as the solo precursor to prepare mesoporous organosilica (SMS-1.0), which had controllable acidity and an ultra-high concentration of sulfur (5.51 mmol g(-1), the highest acid density to date), which was even higher than those of commercial Amberlyst 15 (4.7 mmol g(-1)), HS-JLU-20-0.8 (4.61 mmol g(-1)) and sulfonated carbon (CH0.30O0.33S0.16, 4.90 mmol g(-1)). These structural characteristics give SMS-xs excellent activities and good reusability in biomass conversions and fine chemicals synthesis, which are much better than various solid acids, such as Amberlyst 15, H-form USY zeolite, and sulfonic acid group-functionalized ordered mesoporous silica.