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Separation and Purification Technology

Separation and Purification Technology

IF: 8.09
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The selective adsorption of anionic dyes over 3D printing composite sorbents of aerogel and porous carbon

Published:4 December 2024 DOI: 10.1016/j.seppur.2024.130945
Jia-Xin Li, Yun-Jie Zhao, Yan-Fei Yu, Qi-Qi Huang, Shi-Chao Qi, Xiao-Qin Liu, Lin-Bing Sun

Abstract

As a pollutant widely presented, the dye needs deep purification treatments after use. The traditional ways for dye purification cannot meet the need of selective purification for dyes, especially for the separation between anionic and cationic dyes. In this study, we employ three-dimensional (3D) printing technology to prepare composite sorbents (FGA-PCs) with porous carbon (PC) and foaming gelatin aerogel (FGA). Microscopic analysis indicates that the composite sorbents have well-defined lattice structures. The SBET value of the representative sorbent is 1019?m2 g?1, and the pore-volume is 1.43?cm3 g?1. After adsorption treatment for 60?min, the purification rate of anionic dyes Orange-G (OG) and Methyl-Orange (MO) reach 99?% and 92?%, respectively, with a representative sorbent FGA-PC. In contract, those of cationic dyes Azure-A (TA) and Rhodamine-B (RB) are only 0.55?% and 9.5?%, respectively, showing excellent separation capability for anionic dyes. With the 3D printing, the PC and FGA are combined strongly. According to the experimental and the density functional theory (DFT) results, it can be proved that the electrons of the FGA partially transfer to the PC and the dipole moment of composite sorbents can be changed. Therefore, the composite sorbent FGA-PC displays good adsorption selectivity for anionic dyes.

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Procduct Name CAS Molecular Formula Supplier Price
Gelatin 9000-70-8 C6H12O6 872 suppliers $23.90-$3880.00

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