Highly Efficient Adsorption of Cr(VI) by Mechanically Enhanced Chitosan Oligosaccharide Aerogel with Hierarchical Porosity

IF 3.9 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-03-24 DOI:10.1021/acs.langmuir.4c05019

Dandan Liu, Hui Zhang, Jinfeng Mei, Xudong Zheng, Jian Rong, Zhongyu Li

引用次数: 0

Abstract

A three-dimensional porous aerogel was synthesized by combining soft chitosan oligosaccharide to hard multi-walled carbon nanotubes (MWCNTs) under mild conditions. Owing to the support of MWCNTs, mesopores can be detected on the inner surfaces of the aerogel. The cross-linking by tetraethylenepentamine forms a macropore structure after freeze drying, using water as the template. The hydrogel can bear 30% recoverable compression with the aid of hydrogen bonds between the amide groups. The aerogel exhibits excellent adsorption capabilities for Cr(VI) in water. The adsorption capacity can reach 367.6 mg/g within 100 min. Notably, the aerogel demonstrated an extremely high efficiency in removal for trace Cr(VI). Soluble Cr(VI) of 1 mg/L can be completely removed by the aerogel at a dosage of 0.2 g/L. This work provides a new strategy to synthesize adsorbents with hierarchical pores that exhibit high porosity and a fast mass transfer rate.

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层状孔隙度机械强化壳聚糖气凝胶高效吸附Cr（VI）

在温和条件下，将软壳聚糖低聚糖与硬多壁碳纳米管（MWCNTs）结合，合成了一种三维多孔气凝胶。由于多壁碳纳米管的支撑作用，气凝胶的内表面可以检测到中孔。以水为模板，通过四乙烯五胺交联，冷冻干燥后形成大孔结构。借助酰胺基团间的氢键，水凝胶可承受 30% 的可回收压缩。这种气凝胶对水中的六（Cr）具有出色的吸附能力。在 100 分钟内，吸附容量可达 367.6 毫克/克。值得注意的是，气凝胶对痕量六价铬的去除效率极高。气凝胶的用量为 0.2 g/L，就能完全去除 1 mg/L 的可溶性六价铬。这项工作为合成具有高孔隙率和快速传质速率的分层孔吸附剂提供了一种新策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).