Synthesis and characterization of ZnNiCr-layered double hydroxides with high adsorption activities for Cr(VI)

被引：105
作者：
Guo, Lin [1 ]
Zhang, Yufei [1 ]
Zheng, Junjie [1 ]
Shang, Linqing [1 ]
Shi, Yujia [1 ]
Wu, Qi [1 ]
Liu, Xiaoxiao [1 ]
Wang, Yingming [1 ]
Shi, Longqing [2 ]
Shao, Qian [1 ]
机构：
[1] Shandong Univ Sci & Technol, Coll Chem & Biol Engn, Qingdao 266590, Peoples R China
[2] Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China
来源：
ADVANCED COMPOSITES AND HYBRID MATERIALS | 2021年 / 4卷 / 03期
基金：
英国科研创新办公室;
关键词：
ZnNiCr-layered double hydroxides; Microwave hydrothermal; Cr(VI); Adsorption;
D O I：
10.1007/s42114-021-00260-x
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
ZnNiCr-layered double hydroxides (ZnNiCr-LDHs) applied for Cr(VI) removal were designed and synthesized through the microwave hydrothermal method. When molar ratio of Zn2+/Ni2+ is 7:1 and (Zn2+, Ni2+)/Cr3+ is 3:1, the morphology of the as-prepared ZnNiCr-LDHs was irregular blocky structure, which comprised a flake structure. The specific surface area could reach 354.36 m(2)/g, providing rich adsorption sites for Cr(VI) adsorption. Adsorption experimental results suggested that ZnNiCr-LDHs possess a maximum adsorption capacity of 28.2 mg/g at pH = 2, which is larger than that of ZnCr-LDHs and NiCr-LDHs. The adsorption experiment conforms to the Langmuir monolayer adsorption model and the kinetic adsorption data are well fitted by the pseudo-second-order adsorption kinetic equation. The as-prepared ZnNiCr-LDHs have potential application prospects in the removal of Cr(VI) in wastewater.
引用
收藏
页码：819 / 829
页数：11
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