Molecular imprinting photoelectrochemical sensor as well as preparation method and application thereof

A molecular imprinting and photoelectrochemical technology, applied in the fields of material electrochemical variables, scientific instruments, instruments, etc., can solve the problems of low detection sensitivity of photoelectrochemical sensing, cumbersome pretreatment steps, expensive instruments and equipment, etc. The effect of improving photoelectrochemical performance and specific surface area

Active Publication Date: 2020-06-12
SHANXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems such as cumbersome sample pretreatment steps, expensive instruments and equipment, and the need for professional and technical personnel to operate in the traditional oxytetracycline detection method, as well as technical problems such as low detection sensitivity and poor selectivity of photoelectrochemical sensing

Method used

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  • Molecular imprinting photoelectrochemical sensor as well as preparation method and application thereof
  • Molecular imprinting photoelectrochemical sensor as well as preparation method and application thereof
  • Molecular imprinting photoelectrochemical sensor as well as preparation method and application thereof

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Embodiment 1

[0033] A MIL-125-NH based 2 / TiO 2 Molecularly imprinted photoelectrochemical sensor of composite material, including working electrode, and MIL-125-NH sequentially modified on the surface of the working electrode 2 / TiO 2 The photoelectric conversion layer and the molecular imprinted film layer, the working electrode is an indium tin oxide electrode (ITO).

Embodiment 2

[0035] A MIL-125-NH based 2 / TiO 2 A method for preparing a molecularly imprinted photoelectrochemical sensor of a composite material, comprising the following steps:

[0036] Step 1, using the hydrothermal synthesis method to prepare MIL-125-NH 2 / TiO 2 composite material, and the MIL-125-NH 2 / TiO 2 After the composite material is vacuum-dried, it is sealed and stored for future use;

[0037] Step 2, put the indium tin oxide electrode in the cleaning solution, gently scrub the surface with a cotton ball, rinse with distilled water, and place it in absolute ethanol for ultrasonic treatment for 5 minutes, take out the indium tin oxide electrode, rinse with distilled water, and blow dry with nitrogen ,spare;

[0038] Step 3, the MIL-125-NH prepared in step 1 2 / TiO 2 The composite material is dispersed in ultrapure water to obtain a uniform dispersion, and 30 μL of the uniform dispersion is drip-coated on the surface of the indium tin oxide electrode (ITO) treated in st...

Embodiment 3

[0045] A MIL-125-NH based 2 / TiO 2 A method for preparing a molecularly imprinted photoelectrochemical sensor of a composite material, comprising the following steps:

[0046] Step 1, using the hydrothermal synthesis method to prepare MIL-125-NH 2 / TiO 2 composite material, and the MIL-125-NH 2 / TiO 2 After the composite material is vacuum-dried, it is sealed and stored for future use;

[0047] Step 2, put the indium tin oxide electrode in the cleaning solution, gently scrub the surface with a cotton ball, rinse with distilled water, and place it in absolute ethanol for ultrasonic treatment for 5 minutes, take out the indium tin oxide electrode, rinse with distilled water, and blow dry with nitrogen ,spare;

[0048] Step 3, the MIL-125-NH prepared in step 1 2 / TiO 2 The composite material was dispersed in ultrapure water to obtain a uniform dispersion, and 50 μL of the uniform dispersion was drip-coated on the surface of the indium tin oxide electrode (ITO) treated in ...

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Abstract

The invention belongs to the technical field of photoelectrochemical sensing analysis and detection and food detection and sensing, and particularly relates to a molecular imprinting photoelectrochemical sensor based on an MIL-125-NH2/TiO2 composite material as well as a preparation method and application of the molecular imprinting photoelectrochemical sensor. The invention aims to solve the problems of complicated sample pretreatment steps, expensive instruments and equipment, need of operation of professional technicians and the like in the traditional oxytetracycline detection method, andthe technical problems of low photoelectrochemical sensing detection sensitivity, poor selectivity and the like. According to the invention, the defects of complex sample pretreatment process, expensive instrument, complex operation and the like in the existing oxytetracycline detection method based on chromatographic technology are mainly solved, and a simple, convenient, rapid, sensitive and reliable analysis and detection means is provided for detecting oxytetracycline in complex samples in the practical application process.

Description

technical field [0001] The invention belongs to the field of photoelectrochemical sensing analysis and detection, food detection and sensing technology, and specifically relates to a MIL-125-NH-based 2 / TiO 2 Molecularly imprinted photoelectrochemical sensor of composite material and its preparation method and application. Background technique [0002] Oxytetracycline (OTC) is a tetracycline antibiotic with good antibacterial and bactericidal effects. As a broad-spectrum antibiotic, it is widely used in aquaculture and animal husbandry. However, the unreasonable use of oxytetracycline often leads to excessive content of oxytetracycline in some animal foods, groundwater and production wastewater. The existing detection method of oxytetracycline is mainly high-performance liquid chromatography, which has high equipment cost, complicated pretreatment, long time-consuming, and cumbersome operation. Therefore, it is of great practical significance to develop a rapid and effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01N27/447G01N27/44G01N27/38
CPCG01N27/38G01N27/44G01N27/44726G01N27/48
Inventor 杨钰昆闫文艳张锦华王小敏郭彩霞尉立刚张国华范三红
Owner SHANXI UNIV
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