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Preparation and application methods of mesoporous TiO2 surface enhanced raman scattering active substrate

A surface-enhanced Raman and active substrate technology, which is applied in Raman scattering, measuring devices, instruments, etc., can solve the problems of weak activity and achieve the effects of long shelf life, good stability, and convenient and rapid SERS research

Inactive Publication Date: 2017-07-21
JIAMUSI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is to solve existing TiO 2 The technical problem of weak activity when nanoparticles are used as surface-enhanced Raman scattering (SERS) active substrates, and to provide a mesoporous TiO 2 Preparation and Application of Surface Enhanced Raman Scattering Active Substrate

Method used

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  • Preparation and application methods of mesoporous TiO2 surface enhanced raman scattering active substrate
  • Preparation and application methods of mesoporous TiO2 surface enhanced raman scattering active substrate
  • Preparation and application methods of mesoporous TiO2 surface enhanced raman scattering active substrate

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specific Embodiment approach 1

[0019] Specific embodiment one: the mesoporous TiO of this embodiment 2 The preparation method of the surface-enhanced Raman scattering active substrate is carried out according to the following steps:

[0020] 1. According to the volume ratio (20~25):(5~7):1, mix ethanol, water and concentrated nitric acid evenly, then add triblock copolymer P123, and ultrasonically disperse for 30~60min to obtain P123 solution; among them, P123 solution The mass percent concentration of P123 in the medium is 3% to 16%;

[0021] 2. Mix tetrabutyl titanate and absolute ethanol evenly at a volume ratio of 1:1 to obtain a tetrabutyl titanate solution;

[0022] 3. Add the tetrabutyl titanate solution dropwise into the P123 solution under stirring conditions. After the dropwise addition, raise the temperature to 30-35°C, stir vigorously for 90-120 minutes, and then slowly stir for 30-60 minutes to obtain the sol;

[0023] 4. Transfer the sol to a hydrothermal kettle, put it in an oven for hydrot...

specific Embodiment approach 2

[0025] Embodiment 2: This embodiment is different from Embodiment 1 in that the rotating speed of the vigorous stirring in step 3 is 2500-3000 rpm; others are the same as Embodiment 1.

specific Embodiment approach 3

[0026] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the rotating speed of the slow stirring in step 3 is 500-1000 rpm; others are the same as Embodiment 1 or 2.

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Abstract

The invention discloses preparation and application methods of a mesoporous TiO2 surface enhanced raman scattering active substrate, relates to preparation and application methods of a surface enhanced raman scattering active substrate, and aims to solve the technical problem of relatively low activity caused by the existing technology of preparing the surface enhanced raman scattering active substrate from TiO2 nano particles. The method comprises the following steps: adding P123 into an ethyl alcohol, water and concentrated nitric acid mixed solution, thus obtaining a solution P123; dropping a tetrabutyl titanate solution into the solution P123 for stirring, thus obtaining sol; performing hydrothermal treatment and sintering on the sol, thus obtaining the mesoporous TiO2 surface enhanced raman scattering active substrate. The application is as follows: modifying the mesoporous TiO2 surface enhanced raman scattering active substrate with the surface of a detected object, and performing surface enhanced raman scattering test. The lowest detection concentration of the active substrate disclosed by the invention reaches 10<-8>M, so that the active substrate can be used for detecting medicine molecules.

Description

technical field [0001] The invention relates to a surface-enhanced Raman scattering active substrate, a preparation method and application thereof. Background technique [0002] The surface-enhanced Raman scattering (Surface-enhanced Raman Scattering, SERS) effect is due to the phenomenon that when species such as molecules are adsorbed or very close to a surface with a certain nanostructure, the Raman signal intensity of the molecule is significantly enhanced compared with that of the bulk molecule. With the continuous development of nanotechnology, SERS technology has developed into an effective tool and method for probing surface and interface properties and intermolecular interactions, and characterizing molecular adsorption behavior and molecular structure. The generation of SERS requires the help of substrates with SERS activity. Since the discovery of SERS, the research on the preparation and enhancement mechanism of new substrates has always been a hot spot of concer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 杨立滨江欣沈宇李秀玲杨铭尹迪
Owner JIAMUSI UNIVERSITY
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