Effect of drying step on layered double hydroxides properties: Application in reactive dye intercalation

被引：10

作者：

El Hassani, Kaoutar ^{[1
]}

Jabkhiro, Hajar ^{[1
]}

Kalnina, Daina ^{[2
]}

Beakou, Buscotin Horax ^{[1
]}

Anouar, Abdellah ^{[1
]}

机构：

[1] Univ Hassan First, Fac Sci & Technol, Lab Appl Chem & Environm, BP 577,Route Casa, Settat 26000, Morocco

[2] Riga Tech Univ, Fac Mat Sci & Appl Chem, Rudolfs Cimdins Riga Biomat Innovat & Dev Ctr RTU, Inst Gen Chem Engn, Pulka 3, LV-1007 Riga, Latvia

来源：

APPLIED CLAY SCIENCE | 2019年 / 182卷

关键词：

Layered double hydroxide; Freeze-drying; Reactive dye; Partial intercalation; Preferential orientation; ANION-EXCHANGE REACTIONS; INTERLAYER ANIONS; ACTIVATED CARBON; REMOVAL; ADSORPTION; NANOPARTICLES; IONS; AL; DEGRADATION; FORMULATION;

D O I：

10.1016/j.clay.2019.105246

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：

Freeze-dried sulfate intercalated layered double hydroxides (LDH) phase was synthetized by coprecipitation method via direct intercalation of sulfate anion. The effect of freeze-drying process on LDH properties was investigated. The resulting phase was evaluated for its efficiency in the intercalation of the reactive azo dye, Remazol Brilliant Red F3B (RR-F3B). The freeze-dried phase exhibited a low crystallinity and narrow particle size distribution compared to conventional LDH phases. The freezing step led to highly aggregated nanoparticles with a characteristic distance d003 of 8.12 A. The preferential arrangement of the intercalated dye species was examined by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses. The results showed that RR-F3B molecules were partially accommodated between the LDH layers as single-layer with horizontal orientation. The effect of drying on morphological and structural properties can be attributed to several stresses during freezing and drying steps.

引用

页数：7

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