First Author:Xinyue Zhang

Correspondence Author:Yang Qi,Hong-Bin Sun

Co author:Nianyi Xie , Ying Guo , Rongxiu Guo , Tong Jiang , Yao Wang , Yiming Wang , Dun Niu

Journal:Nanotechnology

Issue:27

Volume:33

Impact Factor:2.8

DOI number:10.1088/1361-6528/ac639a

Affiliation of Author(s):School of Materials Science and Engineering, Northeastern University

Teaching and Research Group:物理化学

Place of Publication:ENGLAND

Abstract:Actuated by the non-ionic heavy metal of antimony (Sb) contaminants with undesired toxicity to the environment and human health, capturing Sb is urgent to remedy contaminated water. Herein, the lamellar MnCo hydrotalcite was grown on catkin-derived biochar through the in situ etching of ZIF-L to construct a hierarchical microtube@nanosheet hybrid (CLMH) for Sb immobilization. The adsorption behaviour and mechanism of trivalent antimony (Sb (III)) on the CLMH were investigated. The CLMH shows good pH applicability for capturing Sb(III) at pH from 2 to 9. The excellent adsorption capacity of CLMH for Sb(III) is 247.62 mg g−1 at 303 K, and the endothermic process is proved by the positive value of ΔH0 (10.54 kJ mol−1). The adsorption process is fitted with the intra-particle diffusion model, which can be described with external mass transfer, intraparticle diffusion in pores, and equilibrium stage. The adsorption mechanism is proved, which includes the bind of Metal–O–Sb bonds by inner-sphere complex, the embedding of Sb in the intercalation of hydrotalcite, redox between Mn and Sb, and functional groups dependent anchoring effect. The work benefits the understanding of the antimony removal behaviour over the hierarchical microtube@nanosheet hybrids.

Key Words:antimony; adsorption; biochar; in situ conversion; microtube-hybrid, antimony, adsorption, biochar, in situ conversion, microtube@nanosheet hybrid

Document Code:WOS:000783981100001

Discipline:Natural Science

First-Level Discipline:Chemistry

Page Number:275704

ISSN No.:0957-4484

Translation or Not:no