Molybdenum-based polyoxometallate-heme composite nanomaterial as well as preparation method and application thereof

The preparation of molybdenum-based polyoxometalate-heme composite nanomaterials by a simple manual grinding method solves the problems of complex synthesis and difficult recovery of nanoenzyme materials, achieves efficient and sensitive AA detection, reduces costs and improves material recovery rate and stability.

CN122141765APending Publication Date: 2026-06-05BOHAI UNIV
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Patent Information

Application Number
CN202610251021.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-03
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

The existing nanozyme materials for AA detection are complex to synthesize, difficult to recycle, and cannot be reused, which limits their application in food testing.

Method used

Molybdenum-based polyoxometalate-heme composite nanomaterials were prepared by manual grinding at room temperature. Solid-phase nanomaterials were prepared by centrifugation, washing and vacuum drying, which simplified the synthesis process. The materials were recovered by centrifugation or filtration.

Benefits of technology

It achieves efficient and sensitive AA colorimetric detection with a detection limit as low as 1.1 μM and a recovery rate as high as 98.4%-102.7%. The material retains more than 73% of its catalytic activity after being reused 10 times, which reduces detection costs and environmental pollution.

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Abstract

The invention provides a molybdenum-based polyoxometallate-heme composite nano-material and a preparation method and application thereof.The method comprises the steps that under the room temperature condition, molybdenum-based polyoxometallate and heme hemin are mixed in a manual grinding mode, and the molybdenum-based polyoxometallate-heme composite nano-material is obtained; and sequentially carrying out centrifugal separation, washing and vacuum drying on the obtained mixture to prepare the solid-phase molybdenum-based polyoxometallate-heme composite nano material. The nano composite material is synthesized through a simple manual grinding method, and can be prepared through the steps of room-temperature grinding, centrifugal separation, washing and vacuum drying under the condition that complex equipment, high temperature and high pressure or toxic organic solvents are not needed. The prepared Hemin-coated PMo12 has excellent peroxidase simulation activity, and colorimetric detection of AA is realized on the basis of the Hemin-coated PMo12. The colorimetric sensor constructed by the Hemin-coated PMo12 nano composite material can rapidly, accurately and quantitatively detect the AA content in fresh fruits, and has a wide application prospect in the fields of food nutrition analysis, quality control, field detection and the like.
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