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

被引：102

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

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

页码：819 / 829

页数：11

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