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Preparation method of ZIF-8-derived ZnO/g-C3N4 and application of ZIF-8-derived ZnO/g-C3N4 in oxytetracycline sensor

A ZIF-8, biosensor technology, applied in the field of biosensors, can solve the problems of high specific surface area, high photo-induced carrier recombination rate, and achieve the effects of high sensitivity, accelerated separation efficiency, and improved selectivity

Pending Publication Date: 2022-05-24
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, metal-organic framework-derived metal oxides have attracted extensive attention due to their porous structure, high specific surface area, and abundant active sites. However, the high photoinduced carrier recombination rate limits their applications.

Method used

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  • Preparation method of ZIF-8-derived ZnO/g-C3N4 and application of ZIF-8-derived ZnO/g-C3N4 in oxytetracycline sensor
  • Preparation method of ZIF-8-derived ZnO/g-C3N4 and application of ZIF-8-derived ZnO/g-C3N4 in oxytetracycline sensor
  • Preparation method of ZIF-8-derived ZnO/g-C3N4 and application of ZIF-8-derived ZnO/g-C3N4 in oxytetracycline sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. A ZIF-8-derived ZnO / g-C 3 N 4 The preparation method of nanocomposite material comprises the following steps:

[0038] (1) Preparation of ZIF-8:

[0039]Using methanol as a solvent to dissolve Zn(NO) 3 ) 2 ·6H 2 O and 2-methylimidazole. The 2-methylimidazole solution was slowly poured into Zn(NO 3 ) 2 ·6H 2 In O solution, Zn(NO 3 ) 2 ·6H 2 The substance concentration ratio of O solution and 2-methylimidazole solution is 1:2, and the volume ratio is 1:1. The mixture was left at room temperature for 12 h. The above mixed solution was centrifuged to collect the white product (ZIF-8) and washed with absolute ethanol three times. The obtained ZIF-8 was dried in a vacuum drying oven at 60 °C for 12 h.

[0040] (2) ZnO / g-C 3 N 4 Preparation of nanocomposites

[0041] Melamine and ZIF-8 were mixed in a certain molar ratio (1:20) and ground in an agate mortar for 10 min. The mixture obtained by grinding was placed in an alumina crucible with a lid, raised to...

Embodiment 2

[0043] 1. A ZIF-8-derived ZnO / g-C 3 N 4 The preparation method of nanocomposite material comprises the following steps:

[0044] (1) Preparation of ZIF-8:

[0045] Using methanol as a solvent to dissolve Zn(NO) 3 ) 2 ·6H 2 O and 2-methylimidazole. The 2-methylimidazole solution was slowly poured into Zn(NO 3 ) 2 ·6H 2 In O solution, Zn(NO 3 ) 2 ·6H 2 The substance concentration ratio of O solution and 2-methylimidazole solution is 1:2, and the volume ratio is 1:1. The mixture was left at room temperature for 12 h. The above mixed solution was centrifuged to collect the white product (ZIF-8) and washed with absolute ethanol three times. The obtained ZIF-8 was dried in a vacuum drying oven at 60 °C for 12 h.

[0046] (2) ZnO / g-C 3 N 4 Preparation of nanocomposites

[0047] Melamine and ZIF-8 were mixed in a certain molar ratio (1:10) and ground in an agate mortar for 10 min. The mixture obtained by grinding was placed in an alumina crucible with a lid, raised t...

Embodiment 3

[0049] 1. A ZIF-8-derived ZnO / g-C 3 N 4 The preparation method of nanocomposite material comprises the following steps:

[0050] (1) Preparation of ZIF-8:

[0051] Using methanol as a solvent to dissolve Zn(NO) 3 ) 2 ·6H 2 O and 2-methylimidazole. The 2-methylimidazole solution was slowly poured into Zn(NO 3 ) 2 ·6H 2 In O solution, Zn(NO 3 ) 2 ·6H 2 The substance concentration ratio of O solution and 2-methylimidazole solution is 1:2, and the volume ratio is 1:1. The mixture was left at room temperature for 12 h. The above mixed solution was centrifuged to collect the white product (ZIF-8) and washed with absolute ethanol three times. The obtained ZIF-8 was dried in a vacuum drying oven at 60 °C for 12 h.

[0052] (2) ZnO / g-C 3 N 4 Preparation of nanocomposites

[0053] Melamine and ZIF-8 were mixed in a certain molar ratio (3:20) and ground in an agate mortar for 10 min. The mixture obtained by grinding was placed in an alumina crucible with a lid, raised t...

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Abstract

The invention belongs to the technical field of biosensors, and discloses a preparation method of ZIF-8-derived ZnO / g-C3N4 and an application of the ZIF-8-derived ZnO / g-C3N4 in an oxytetracycline sensor. ZIF-8-derived ZnO and g-C3N4 are combined, and due to the fact that the ZnO and the g-C3N4 have matched energy band structures, a typical type II heterojunction can be obtained through compounding, and then a relatively large photoelectric signal is obtained. The surface of an electrode is modified with the composite material, an oxytetracycline aptamer is further introduced, the high-performance photoelectrochemical biosensor is designed and constructed to achieve specific detection of oxytetracycline, the sensor has a good linear relation within the concentration range of 0.005-200 nM, and the detection limit is 3.92 * 10 <-4 > nM. The photoelectrochemical biosensor constructed by the invention is low in background signal, high in sensitivity and good in selectivity, and provides a good sensing platform for oxytetracycline detection.

Description

technical field [0001] The invention belongs to the technical field of biosensors, in particular to a ZIF-8-derived ZnO / g-C 3 N 4 The preparation method of nanocomposite material and its application in photoelectrochemical biosensor can realize the sensitive detection of oxytetracycline (OTC). Background technique [0002] Oxytetracycline (OTC), as a broad-spectrum antibacterial agent, is one of the most commonly used tetracycline antibiotics. Due to its effective antibacterial properties, low cost and low side effects, it is widely used in livestock, poultry and aquaculture to prevent and treat bacterial diseases. After OTC drugs are applied, they are excreted from the body and enter the environment in the form of prototype and active metabolites. Because of their non-degradable and easy accumulation characteristics, they have caused serious pollution to the ecological environment. To this end, the Steering Committee of the International Coordinating Committee on Veterin...

Claims

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Application Information

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IPC IPC(8): C01G9/02C01B21/082G01N27/30G01N27/327G01N27/416B82Y30/00
CPCC01G9/02C01B21/0605G01N27/3278G01N27/305G01N27/416B82Y30/00C01P2004/80
Inventor 由天艳姜慧慧刘倩张航
Owner JIANGSU UNIV
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