文献类型：期刊文献

英文题名：Defect-Rich Porous Carbon Derived from Sodium Alginate and Its Efficient Dye Removal Performances

作者：Zhou, Jie[1];Liu, Yonghong[1];Wu, Yuanyuan[1];Li, Na[1];Ren, Xiaorong[1];Chen, Jinyang[1];Li, Junpei[2];Feng, Ruokun[1,2];Yang, Zhen[1,2];Wang, Baoyi[3];Cao, Xingzhong[3];Yu, Runsheng[3];Zeng, Minfeng[1]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Res Ctr Adv Catalyt Mat & Funct Mol Synth, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China;[2]Zhejiang Tsaihua Technol Co Ltd, Zhejiang Prov Doctoral Innovat Stn, Shaoxing 312000, Peoples R China;[3]Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

年份：2024

卷号：9

期号：37

外文期刊名：CHEMISTRYSELECT

收录：SCI-EXPANDED(收录号：WOS:001320309200001)、、Scopus(收录号：2-s2.0-85205283003)、WOS

基金：This work was supported by National Natural Science Foundation of China (Grant No. 12175149, 11875193, and 11475114) and Shaoxing Key Science and Technology Innovation Team Project (No. 2020-34).

语种：英文

外文关键词：Dye removal; Microdefect; Positron annihilation; Sodium alginate

外文摘要：In this study, we reported a defect-rich porous carbon (SAC) derived from sodium alginate (SA) via combined processes of high-temperature carbonization at N2 atmosphere, NaCl hard template, and HCl etching for high-performance absorbents. Besides the meso/macro-porous structure characterization performed with usual morphological and structural analysis methods, sub-nanolevel atomic microdefects of the derived SAC were investigated by positron annihilation lifetime spectroscopy (PALS) for the first time. All the samples displayed hierarchical pore structure, including numerous 3D-interconnected macroporous (0.5-2 mu m), abundant mesopores (3-5 nm), and rich intrinsic microdefects (mean size of 0.304 nm). The specific surface area and pore volume of the optimized SAC sample were 1191.3 m2g-1 and 0.69 cm3g-1, respectively. It was confirmed that the adsorption process of the derived SAC to the dye molecules mainly occurred through a chemical and monolayer adsorption mechanism. The SAC sample showed high efficiency in dye removal, with superior removal capacitance of 230.5 mgg-1 for anionic dye of methyl orange (MO) and 1655.1 mgg-1 for cationic dye of Rhodamine B (RhB) at pH = 7, respectively, which were about two times of that of commercial AC for the presence of more active sites of the derived SAC. This study also exhibited that the derived defect-rich porous carbons from natural-polymers of SA can be considered as an effective adsorbent to remove MO and RhB dyes from industrially polluted water at neutral pH conditions. Defect-rich porous carbon (SAC) adsorbents have been fabricated by high-temperature carbonization of SA at N2 atmosphere using NaCl hard templates and HCl etching. All the samples displayed hierarchical pore structures. The SAC samples with massive active sites show superior efficiency in dye removal both for anionic dye of methyl orange (MO) and cationic dye of Rhodamine B. image