Novel synthesis of layered double hydroxides (LDHs) from zinc hydroxide

被引：55

作者：

Meng, Zilin ^{[1
,2
]}

Zhang, Yihe ^{[1
]}

Zhang, Qian ^{[1
]}

Chen, Xue ^{[1
]}

Liu, Leipeng ^{[1
]}

Komarneni, Sridhar ^{[2
]}

Lv, Fengzhu ^{[1
]}

机构：

[1] China Univ Geosci, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Sch Mat Sci & Technol, Natl Lab Mineral Mat, Beijing 100083, Peoples R China

[2] Penn State Univ, Mat Res Inst, Dept Ecosyst Sci & Management, Mat Res Lab, University Pk, PA 16802 USA

来源：

APPLIED SURFACE SCIENCE | 2017年 / 396卷

关键词：

Layered double hydroxides; Zinc hydroxide; Al substitution for Zn; LDH formation; Substitution and recrystallization; AQUEOUS-SOLUTION; METHYL-ORANGE; REMOVAL; DYE; MG; MECHANISM;

D O I：

10.1016/j.apsusc.2016.11.032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The most common synthesis methods for layered double hydroxides (LDHs) are co-precipitation and reconstruction, which can have some limitations for application. Here, we report a novel synthesis method for LDHs. We use zinc hydroxide as the precursor to synthesize LDHs phase through a simple transformation process of zinc hydroxide phase. For this transformation process, aluminum can enter into zinc hydroxide and replace zinc quickly to transform it into LDH by creating positive charges in the zinc hydroxide solid phase. The mechanism of LDH formation was through Al3+ reaction first with zinc hydroxide followed by recrystallization of the original structure of zinc hydroxide. Thus, the new process of LDH formation involves a reaction of Al to substitute for Zn and recrystallization leading to LDH and the final pH influences the crystallization of LDHs by this process. In addition, Cr3+ was employed as a trivalent cation for LDH formation to react with zinc hydroxide, which also led to LDH structure. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：799 / 803

页数：5

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