第一作者：Xinyue Zhang

通讯作者：Yang Qi,Hong-Bin Sun

合写作者：Nianyi Xie , Ying Guo , Rongxiu Guo , Tong Jiang , Yao Wang , Yiming Wang , Dun Niu

发表刊物：Nanotechnology

期号：27

卷号：33

影响因子：2.8

DOI码：10.1088/1361-6528/ac639a

所属单位：School of Materials Science and Engineering, Northeastern University

教研室：物理化学

刊物所在地：ENGLAND

摘要：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.

关键字：antimony; adsorption; biochar; in situ conversion; microtube-hybrid, antimony, adsorption, biochar, in situ conversion, microtube@nanosheet hybrid

论文编号：WOS:000783981100001

学科门类：理学

一级学科：化学

页面范围：275704

ISSN号：0957-4484

是否译文：否