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Preparation method of high-performance SERS active substrate ZIF-8/Ag-Au/Si-NPA

A technology of ZIF-8 and active substrate, which is applied in measuring devices, instruments, and material analysis through optical means, can solve the problems of slow response, high cost of SERS active substrate, low sensitivity, etc., and achieve the effect of low cost

Inactive Publication Date: 2019-09-27
HENAN POLYTECHNIC UNIV
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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing a high-performance SERS active substrate ZIF-8 / Ag-Au / Si-NPA, which is low in cost, simple and easy to operate, and can quickly and highly sensitively detect liquid The advantages of PCP in the phase solve the problems of high cost, slow response and low sensitivity of the previous SERS active substrate

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  • Preparation method of high-performance SERS active substrate ZIF-8/Ag-Au/Si-NPA

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[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] Please refer to Figure 1-5 , the invention provides a method for preparing a high-performance SERS active substrate ZIF-8 / Ag-Au / Si-NPA, comprising the following four steps:

[0034] (1) Preparation of nanoporous silicon columnar arrays with good reducibility

[0035] Preparation of nanoporous silicon columnar arrays by hydrothermal etching method: A. First, thoroughly clean the P-type single crystal silicon wafer. There are three main steps in the cleaning process. 1....

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Abstract

The invention relates to the technical field of Raman detection, and discloses a preparation method of a high-performance SERS active substrate ZIF-8 / Ag-Au / Si-NPA, which is characterized by comprising the following steps: 1) preparing a nano porous silicon columnar array with favorable reducibility; (2) preparing and optimizing an Ag-Au / Si-NPA SERS active substrate; (3) preparing a ZIF-8 / Ag-Au / Si-NPA SERS active substrate; (4) testing the Raman enhancement performance of the ZIF-8 / Ag-Au / Si-NPA SERS active substrate. According to the preparation method of the high-performance SERS active substrate ZIF-8 / Ag-Au / Si-NPA, through the interaction of the pi-pi bonds formed by the ligand and a benzene ring of PCP, H atoms on PCP can form hydrogen-bond interaction with the ligand, and open metal sites and pi electrons on PCP form pi-complexing interaction, so that the selectivity and the adsorbability of the substrate to PCP are jointly improved. The method disclosed by the invention is low in cost, simple and easy to operate, capable of rapidly detecting the PCP in the liquid phase with high sensitivity, and good in application prospect.

Description

technical field [0001] The invention relates to the technical field of Raman detection, in particular to a preparation method of a high-performance SERS active substrate ZIF-8 / Ag-Au / Si-NPA. Background technique [0002] Surface enhanced Raman scattering spectroscopy (SERS) is an ultrasensitive and non-destructive molecular detection technology, which is widely used in biomedicine, chemical sensing, food safety, environmental pollutant detection and other fields. Nowadays, it is still an important challenge for people to prepare SERS active substrates with high sensitivity, good reproducibility and high stability to realize rapid, direct and highly sensitive detection of environmental organic pollutants. As an organochlorine pesticide, pentachlorophenol (PCP) is widely used as a fungicide, insecticide, herbicide and wood preservative. The surface adsorption of traditional precious metal substrates is poor, and it is difficult to reach the local surface plasmon resonance regio...

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Application Information

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IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 闫玲玲蔡红新陈亮曹国华张国祥刘媛媛
Owner HENAN POLYTECHNIC UNIV
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