Preparation of Agarose Fluorescent Hydrogel Inserted by POSS and Its Application for the Identification and Adsorption of Fe

Overview

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Date 2021 Oct 26

PMID 34698197

Authors

Zhengquan Fu

Ming Li

Yuanhang Li

Zhiyuan Zhang

Di Wang

Chengyu Wang

Jian Li

Affiliations

Soon will be listed here.

Abstract

After entering in water, Fe is enriched in the human body and along the food chain, causing chronic poisoning and irreversible harm to human health. In order to solve this problem, we synthesized citric acid POSS (CAP) from aminopropyl POSS (OAP) and citric acid. Then, we synthesized fluorescent hydrogels (CAP-agarose hydrogel, CAHG) with CAP and agarose. The luminescence mechanism of CAP was investigated by theoretical calculation. CAP plays a dual role in composite hydrogels: one is to give the gels good fluorescence properties and detect Fe; the second is that the surface of CAP has a large content of carbonyl and amide groups, so it can coordinate with Fe to enhance the adsorption properties of hydrogels. The experimental results show that the lowest Fe concentration that CAHG can detect is 5 μmol/L, and the adsorption capacity for Fe is about 26.75 mg/g. In a certain range, the fluorescence intensity of CAHG had an exponential relation with Fe concentration, which is expected to be applied to fluorescence sensors. Even at a lower concentration, CAHG can effectively remove Fe from the solution. The prepared fluorescent hydrogel has great potential in the field of fluorescent probes, fluorescent sensors, and ion adsorption. Besides, CAHG can be used as photothermal material after adsorbing Fe, allowing for material recycling and reducing material waste.

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