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ZIF8 derived semiconductor heterojunction-silver SERS substrate, preparation method and application thereof

A heterojunction and semiconductor technology, applied in the field of ZIF8 derived semiconductor heterojunction-silver SERS substrate and its preparation, achieves the effect of reasonable design, good feasibility and enhanced Raman signal

Pending Publication Date: 2021-10-29
HEFEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although technicians in the industry have proposed a variety of ways to improve TiO 2 strategies for SERS substrate sensitivity, but as of now, no literature has reported TiO 2 Application of @ZnO heterostructure combined with silver nanoparticles as SERS substrate

Method used

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  • ZIF8 derived semiconductor heterojunction-silver SERS substrate, preparation method and application thereof
  • ZIF8 derived semiconductor heterojunction-silver SERS substrate, preparation method and application thereof
  • ZIF8 derived semiconductor heterojunction-silver SERS substrate, preparation method and application thereof

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Effect test

Embodiment 1

[0044] Prepare ZIF8 derivative semiconductor heterojunction-silver SERS substrate by the method provided by the invention, its flow process is as follows figure 1 As shown, the specific steps are as follows:

[0045] S1. Synthesis of TiO 2 Nanorod array: Place a square fluorine-doped tin dioxide (FTO) film (size 20mm*30mm*2mm) in toluene, acetone, ethanol, and deionized water for 15 minutes, then take 18mL deionized water and 12mL Concentration of 36% hydrochloric acid was prepared as a reaction solution, and added to a 50mL Teflon-lined stainless steel autoclave, stirred with a magnetic stirrer for 5min, then added 0.375mL tetra-n-butyl titanate, stirred for 5min, and washed The clean fluorine-doped tin dioxide (FTO) film leans against the inner wall of the reactor, with the conductive side facing down, and then puts the reactor in an oven for high-temperature reaction. The reaction temperature is 160 ° C, the reaction time is 8 hours, and then cooled to At room temperature...

Embodiment 2

[0049] Prepare ZIF8 derivative semiconductor heterojunction-silver SERS substrate by the method provided by the invention, its flow process is as follows figure 1 As shown, the specific steps are as follows:

[0050] S1. Synthesis of TiO 2 Nanorod array: Place a square fluorine-doped tin dioxide (FTO) membrane (size 20mm*30mm*2mm) in toluene, acetone, ethanol, and deionized water for 10 minutes, then take 18mL deionized water and 12mL Concentration of 36% hydrochloric acid was prepared as a reaction solution, and added to a 50mL Teflon-lined stainless steel autoclave, stirred with a magnetic stirrer for 8 minutes, then added 0.3mL tetra-n-butyl titanate, stirred for 8 minutes, and washed The clean fluorine-doped tin dioxide (FTO) film leans against the inner wall of the reactor, with the conductive side facing down, and then puts the reactor in an oven for high-temperature reaction. The reaction temperature is 150 ° C, the reaction time is 9 hours, and then cooled to At room...

Embodiment 3

[0054] Prepare ZIF8 derivative semiconductor heterojunction-silver SERS substrate by the method provided by the invention, its flow process is as follows figure 1 As shown, the specific steps are as follows:

[0055] S1. Synthesis of TiO 2 Nanorod array: Place a square fluorine-doped tin dioxide (FTO) film (size 20mm*30mm*2mm) in toluene, acetone, ethanol, and deionized water for 20 minutes, and then take 18mL deionized water and 12mL Concentration of 38% hydrochloric acid was prepared as a reaction solution, and added to a 50mL Teflon-lined stainless steel autoclave, stirred with a magnetic stirrer for 10min, then added 0.5mL tetra-n-butyl titanate, stirred for 10min, and washed The clean fluorine-doped tin dioxide (FTO) film leans against the inner wall of the reactor, with the conductive side facing down, and then the reactor is placed in an oven for high-temperature reaction. The reaction temperature is 175 ° C, the reaction time is 6 hours, and then cooled to At room te...

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Abstract

The invention relates to the technical field of nano photon detection, and discloses a preparation method and application of a ZIF8-derived semiconductor heterojunction-silver SERS substrate, wherein the ZIF8-derived semiconductor heterojunction-silver SERS substrate is of a three-dimensional square nanorod array structure, a TiO2@ZnO heterostructure is used as a substrate, and silver nanoparticles are uniformly attached to the surface of the TiO2@ZnO heterostructure. The preparation method comprises the following steps: growing uniform and ordered three-dimensional TiO2 nanorods in an FTO film material by using a hydrothermal method, then growing ZIF-8 on the surface of TiO2 by using an impregnation method, then calcining to obtain a TiO2@ZnO heterostructure, and finally attaching silver nanoparticles to the surface of the TiO2@ZnO heterostructure by using a silver mirror reaction. The obtained ZIF8 derived semiconductor heterojunction-silver SERS substrate (TiO2@ZnO@Ag) shows good SERS performance in the aspects of sensitivity, stability and uniformity, and the substrate has great application potential in the aspects of qualitative and quantitative analysis of pesticide molecules.

Description

technical field [0001] The invention relates to the technical field of nanophoton detection, and more specifically, relates to a ZIF8 derived semiconductor heterojunction-silver SERS substrate and its preparation method and application. Background technique [0002] Today, pesticides and drugs are widely used in modern agriculture and food production, and the unreasonable use or abuse of these chemicals can easily cause environmental pollution and pose a threat to human health. Traditional analytical methods such as fluorescence spectroscopy, gas chromatography-mass spectrometry (GC-MS), liquid chromatography-mass spectrometry (LC-MS) and high-performance liquid chromatography (HPLC) are usually used to detect and analyze pesticide residues and toxic substances. Complicated sample processing is usually required, which is time-consuming and costly, which limits its wide application in practical detection and analysis. [0003] Surface-enhanced Raman scattering (SERS) technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65G01N21/01
CPCG01N21/658G01N21/01
Inventor 张茂峰叶诚陈子海陈伟
Owner HEFEI UNIV OF TECH
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