文献类型：期刊文献

英文题名：Template-free synthesis of porous carbonaceous solid acids with controllable acid sites and their excellent activity for catalyzing the synthesis of biofuels and fine chemicals

作者：Liu, Fujian[1];Li, Bojie[2];Liu, Chen[1];Kong, Weiping[1];Yi, Xianfeng[3];Zheng, Anmin[3];Qi, Chenze[1]

机构：[1]Shaoxing Univ, Dept Chem, Shaoxing 312000, Peoples R China;[2]Hubei Engn Univ, Coll Chem & Mat Sci, Xiaogan 432000, Peoples R China;[3]Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan Ctr Magnet Resonance, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China

年份：2016

卷号：6

期号：9

起止页码：2995

外文期刊名：CATALYSIS SCIENCE & TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000375545600016)、、EI(收录号：20162002401624)、Scopus(收录号：2-s2.0-84967145328)、WOS

基金：This work was supported by the National Natural Science Foundation of China (21573150, 21203122, 21473244, 21522310), the Natural Science Foundation of Zhejiang Province (LY15B030002), and the Foundation of State Key Laboratory of Magnetic Resonance and Atomic, Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences (T151303).

语种：英文

外文关键词：Acetone - Biofuels - Carbon - Carbonization - Catalyst activity - Ion exchange - Phenols - Polypyrroles - Porous materials - Potassium hydroxide - Silica

外文摘要：N rich porous carbon based solid acids (NPC-[CxN][X]) have been successfully synthesized by treatment of N rich porous carbon (NPC) with various quaternary ammoniation reagents such as iodomethane, 1,3-propane sultone, and 1,4-butanesultone, and ion exchange with various strong acids such as HSO3CF3, H2SO4, H3PW12O40, HBF4 etc. The NPC support was synthesized by carbonization of KOH-activated polypyrrole without using additional templates. Various characterizations showed that NPC-[CxN][X] possesses abundant nanopores, large Brunauer-Emmett-Teller surface areas, good stability, and strong and controllable acid sites with Bronsted characteristics. The immobilized acidic groups were homogeneously dispersed into NPC-[CxN][X]. Notably, NPC-[CxN][X] acted as efficient, reusable and generalized solid acids, which showed excellent activity in various acid-catalyzed reactions such as esterification and transesterification in the synthesis of biodiesel, dehydration of fructose into 5-hydroxymethylfurfural, depolymerization of crystalline cellulose into sugars, and condensation of phenol with acetone in the synthesis of bisphenol A, much higher than that of various solid acids such as Amberlyst 15, H-ZSM-5, H-USY, and sulfonic group functionalized ordered mesoporous silicas. The preparation of NPC-[CxN][X] leads to the development of porous carbon based solid acids with controllable structural characteristics and excellent catalytic activity.