Preparation of lignin modified hyper-cross-linked nanoporous resins and their efficient adsorption for p-nitrophenol in aqueous solution and CO2 capture

Na Liu; Lishu Shao; Chen Wang; Fubao Sun; Zhiping Wu; Peng Zhan; Lin Zhang; Huan'ai Wan

doi:10.1016/j.ijbiomac.2022.08.196

Preparation of lignin modified hyper-cross-linked nanoporous resins and their efficient adsorption for p-nitrophenol in aqueous solution and CO₂ capture

Int J Biol Macromol. 2022 Nov 30:221:25-37. doi: 10.1016/j.ijbiomac.2022.08.196. Epub 2022 Sep 5.

Authors

Na Liu¹, Lishu Shao², Chen Wang³, Fubao Sun³, Zhiping Wu¹, Peng Zhan¹, Lin Zhang¹, Huan'ai Wan⁴

Affiliations

¹ Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha 410004, China.
² Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; Hunan International Joint Laboratory of Woody Biomass Conversion, Central South University of Forestry and Technology, Changsha 410004, China. Electronic address: lishushao@csuft.edu.cn.
³ Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China.
⁴ Ministry of Forestry Bioethanol Research Center, School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China.

PMID: 36063890
DOI: 10.1016/j.ijbiomac.2022.08.196

Abstract

A series of lignin modified hyper-cross-linked nanoporous resins (LMHCRs) had been synthesized from lignin, 4-vinylbenzyl chloride, and divinylbenzene by free radical polymerization reaction and following Friedel-Crafts reaction. The results indicated that Brunauer-Emmett-Teller surface area (S_BET) of LMHCRs decreased with different degrees compared with polymeric microspheres (HCRs) without adding lignin. With increasing the feeding amount of lignin, the S_BET of LMHCRs first increased and then decreased, and LMHCR-2 had larger S_BET (968.52 m²/g) and average pore size (D_A: 2.51 nm). Meanwhile, their contact angle continuously decreased from 92.1⁰ to 71.3⁰, indicating the enhanced polarity. Interestingly, the adsorption capacity of p-nitrophenol (PNP) on all LMHCRs were obviously higher than rhodamine B, and LMHCR-2 had the largest capacity ratio (3.780) of PNP to rhodamine B or other organic dyes at 298 K. Specifically, the Q_m of PNP on LMHCR-2 reached the largest value (492.1 mg/g) due to its suitable porosity and favorable surface polarity. LMHCR-2 also displayed excellent CO₂ capture (86.5 mg/g) at 273 K and 1 bar and good reusability. This study provided an efficient route to modify hyper-cross-linked resin by using the residual lignin, and showed the enhanced adsorption performance.

Keywords: Adsorption; CO(2) capture; Hyper-cross-linked resin; Lignin; p-Nitrophenol.

MeSH terms

Adsorption
Carbon Dioxide
Lignin*
Nanopores*
Water

Substances

4-nitrophenol
Lignin
Carbon Dioxide
Water