文献类型：期刊文献

英文题名：Preparation of Organic-Inorganic Hybrid Porous Materials and Adsorption Characteristics for (-)-Epigallocatechin Gallate and Caffeine From the Extract of Discarded Tea

作者：Liu, Yi[1,2,3];Liu, Yongfeng[1,2,3];Wu, Xiaoyu[1,2];Zhang, Junhan[1,2,4];Pei, Dong[1,2,3];Wei, Jianteng[1,2,3];Di, Duolong[1,2,3]

第一作者：Liu, Yi

通信作者：Di, DL[1]

机构：[1]Chinese Acad Sci, Key Lab Chem Northwestern Plant Resources, Lanzhou 730000, Peoples R China;[2]Chinese Acad Sci, Lanzhou Inst Chem Phys, Key Lab Nat Med Gansu Prov, Lanzhou 730000, Peoples R China;[3]Ctr Resource Chem & New Mat, Qingdao 266100, Peoples R China;[4]Gansu Coll Tradit Chinese Med, Coll Gansu Prov, Dept Pharm, Key Lab Chem & Qual Tradit Chinese Med, Lanzhou 730000, Peoples R China

第一机构：Chinese Acad Sci, Key Lab Chem Northwestern Plant Resources, Lanzhou 730000, Peoples R China

通信机构：[1]corresponding author), Chinese Acad Sci, Key Lab Chem Northwestern Plant Resources, Lanzhou 730000, Peoples R China.

年份：2015

卷号：55

期号：10

起止页码：2414

外文期刊名：POLYMER ENGINEERING AND SCIENCE

收录：;EI(收录号：20152600970833);Scopus(收录号：2-s2.0-84941873902);WOS:【SCI-EXPANDED(收录号:WOS:000362829900026)】；

基金：Contract grant sponsor: "Hundred Talents Program" of the Chinese Academy of Sciences (CAS); contract grant sponsor: National Natural Sciences Foundation of China; contract grant number: NSFC No. 20974116.

语种：英文

外文关键词：Adsorption - Caffeine - Chemical analysis - Hydrogen bonds - Oxide minerals - Porous materials - Room and pillar mining - Tea - Titanium dioxide

摘要：A series of novel organic-inorganic hybrid porous materials were synthesized using the method of suspension polymerization. As content of oleic acid-coated TiO2 introduced increased, the surface area, pore volume, and average pore diameter increased, and meantime macropores appeared. The adsorption efficiencies of the porous materials for (-)-epigallocatechin gallate (EGCG) and caffeine (CAF) were enhanced, due to synergistic effect of surface area, pore volume, average pore diameter, and several driving forces such as charge induced force, pi-pi stacking, and hydrogen bond. Adsorption kinetic analysis indicated that pseudo-second-order kinetics can reasonably depict the adsorption process, and intraparticle diffusion became more obvious after a contact time of 30 min. Adsorption isotherm analysis indicated Freundlich isotherm could be used to describe the adsorption process. Charge induced force, pi-pi stacking, hydrogen bond, and sieving effect of pores were the main driving forces for the adsorption of EGCG and CAF by the organic-inorganic hybrid porous materials. This study will open possibility of expanding number and types of porous materials and provide assistance in tailoring corresponding physical-chemical properties, according to specific analytes. (C) 2015 Society of Plastics Engineers