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
Title of Paper:Biochar microtube interconnected hydrotalcite nanosheets for the adsorption of aqueous Sb(III)
Journal:Nanotechnology
Issue:27
Volume:33
Impact Factor:2.8
DOI Number:10.1088/1361-6528/ac639a
Institution:School of Materials Science and Engineering, Northeastern University
Teaching and Research Group:物理化学
Place of Publication:ENGLAND
Summary: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:0957-4484
Translation or Not:No