Influence of ultrasound and cation substitution on the intercalation of organic anions to the Mg3/Al1 layered double hydroxide

EFB Bioeconomy Journal Pub Date : 2022-11-01 DOI:10.1016/j.bioeco.2022.100024

Ligita Valeikiene, Kamile Kriukaite, Inga Grigoraviciute-Puroniene, Anton Popov, Aivaras Kareiva

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Abstract

The Mg₃/Al₁ and Mg_3-xM_x/Al₁ (M = Mn, Co, Ni, Cu, Zn) layered double hydroxides (LDHs) were synthesized using sol-gel synthesis technique. The intercalation with different organic anions (formate (HCOO⁻), acetate (CH₃COO⁻), oxalate (C₂O₄²⁻), tartrate (C₄H₆O₄²⁻) and citrate (C₆H₅O₇³⁻)) using ion exchange approach was investigated. The influence of ultrasound and cation substitution on the intercalation of organic anions to the Mg₃/Al₁ LDH has been investigated. The obtained results indicated that ultrasound has a positive effect in some cases for the intercalation of organic anions into the Mg₃/Al₁ LDH system. On the other hand, the substitution of magnesium by transition metals has negligible effect on the intercalation process. The synthesized and intercalated LDHs were characterized by X-ray diffraction (XRD) analysis, infrared (FTIR) spectroscopy, Raman spectroscopy, thermal (TG-DTG-DCS) analysis and scanning electron microscopy (SEM).

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超声和阳离子取代对有机阴离子插入Mg3/Al1层状双氢氧化物的影响

采用溶胶-凝胶法合成了Mg3/Al1和Mg3- xmx /Al1 (M = Mn, Co, Ni, Cu, Zn)层状双氢氧化物(LDHs)。采用离子交换法研究了不同有机阴离子(甲酸盐(HCOO−)、乙酸盐(CH3COO−)、草酸盐(C2O42−)、酒石酸盐(C4H6O42−)和柠檬酸盐(C6H5O73−)的插层反应。研究了超声和阳离子取代对有机阴离子插入Mg3/Al1 LDH的影响。所得结果表明，在某些情况下，超声对有机阴离子插入Mg3/Al1 LDH体系有积极作用。另一方面，过渡金属取代镁对插层过程的影响可以忽略不计。采用x射线衍射(XRD)、红外光谱(FTIR)、拉曼光谱(Raman)、热分析(TG-DTG-DCS)和扫描电镜(SEM)对合成的和插层的LDHs进行了表征。

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EFB Bioeconomy Journal

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