Cerium-based metal organic framework for Cr (VI) detection, preparation method and application thereof

An organic framework and metal-based technology, which is applied in the field of optical sensing and achieves good application prospects, strong oxidase activity and good selectivity.
CN110128673AActive Publication Date: 2019-08-16NANCHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANCHANG UNIV
Publication Date
2019-08-16

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Abstract

The invention relates to the technical field of optical sensing, and particularly discloses a cerium-based metal organic framework for Cr (VI) detection, a preparation method and application. The cerium-based metal organic framework employs a cerium dioxide nano-rod with mimic enzyme activity as a template and provides cerium ions as an ion center; then terephthalic acid is added for nucleation and growth to obtain the cerium-based metal organic framework. The cerium dioxide nano-rod is obtained by mixing cerium nitrate hexahydrate and sodium hydroxide for reaction and performing centrifugation, washing and vacuum drying; and the cerium-based metal organic framework is applied to detection of Cr (VI). The cerium-based metal organic framework is synthesized by applying a sacrificial template method for the first time, has higher oxidase activity and selectivity than those of a CeO2 nano material, achieves sensitive detection on Cr (VI), has the advantages of high sensitivity, good selectivity, simplicity and rapidness, and has a good application prospect.
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Description

technical field

[0001] The invention belongs to the technical field of optical sensing, and in particular relates to a cerium-based metal-organic framework for Cr(VI) detection, a preparation method and an application. Background technique

[0002] Chromium is the 21st most abundant element in the earth's crust, and there are mainly two oxidation states of Cr(III) and Cr(VI) in the environment. Metal plating and processing, leather tanning, industrial cooling water preservatives, and wood preservative treatments can all lead to increased chromium concentrations in the environment. The two oxidation states of Cr have distinctly different chemical properties and human toxicity. Cr(III) is a trace element required by the human body and is less toxic. It can form trivalent cations (or hydrolysis products), which strongly bind to mineral surfaces and form metal hydroxides with limited solubility. Cr(VI) is usually used as a chromate oxyanion and is a known human respiratory car...

Claims

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