Detection method of trace substance content using micro-nano structure oxide ceramic material

A technology of trace substance content and oxide ceramics, applied in the field of spectroscopic analysis, can solve the problems of high production cost, poor SERS substrate sensitivity, poor repeatability, etc., and achieve the effects of low cost, environmental friendly cost and short preparation period

Active Publication Date: 2017-06-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor sensitivity, poor repeatability, or high production cost in existing SERS substrates

Method used

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  • Detection method of trace substance content using micro-nano structure oxide ceramic material
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  • Detection method of trace substance content using micro-nano structure oxide ceramic material

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Experimental program
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specific Embodiment approach 1

[0030] Specific implementation mode 1: This implementation mode is a preparation method of a micro-nano structure oxide ceramic material, which is specifically completed according to the following steps:

[0031] 1. Press green body: Put the oxide powder into the mold of the tablet press and put it into the tablet press, pressurize at a pressure boosting speed of 0.01MPa / s-10MPa / s to a pressure of 0.1MPa-40MPa, and pressurize Hold at 0.1MPa~40MPa for 10s~60s, and take out the obtained ceramic material green body;

[0032] 2. Roasting: put the ceramic material green body obtained in step 1 into a crucible and put it into a high-temperature furnace, set the temperature change program of the high-temperature furnace, so that the ceramic material green body is roasted at a temperature of 600°C to 1300°C for 0.5h to 4h, Take it out with the furnace cooling to room temperature, and obtain the micro-nano structure oxide ceramic material.

[0033] Oxides are widely used in the prepar...

specific Embodiment approach 2

[0036] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the average particle size of the oxide powder in step 1 is 1 nm˜10 μm. Others are the same as the first embodiment.

specific Embodiment approach 3

[0037] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the discreteness of the particle size distribution of the oxide powder described in step one90 -D 10 ) / D 50 , where D 90 Indicates that the particle size of the oxide powder is smaller than D 90 The mass fraction of oxide powder is 90%, D 10 Indicates that the particle size of the oxide powder is smaller than D 10 The mass fraction of oxide powder is 10%, D 50 Indicates that the particle size of the oxide powder is smaller than D 50 The mass fraction of oxide powder is 50%. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a detection method for trace substance content using a micro-nano structure oxide ceramic material, which belongs to the technical field of spectral analysis, and specifically relates to a detection method for a trace substance content using a micro-nano structure oxide ceramic material. The purpose of the invention is to solve the problems of poor sensitivity, poor repeatability, or high production cost in the existing SERS substrate. Detection method: ①, preparation of silver sol; ②, mixing; ③, determination of Raman shift, sensitivity and standard curve; ④, detection, that is, to complete the detection of trace substance content using micro-nano structure oxide ceramic materials. The invention is mainly used for detecting the content of trace substances.

Description

technical field [0001] The invention belongs to the technical field of spectroscopic analysis, and in particular relates to a method for detecting trace substance content by using a micro-nano structure oxide ceramic material. Background technique [0002] Surface-enhanced Raman scattering (SERS) is widely used in food testing, biomedicine, material analysis, fields of chemical analysis. However, the prerequisite for surface-enhanced Raman scattering technology to achieve rapid, on-site, and real-time detection is that it must have good repeatability and stability. [0003] In recent years, many different types of substrates with Raman activity have been fabricated and applied to SERS detection. The existing SERS substrates can be roughly divided into two types: metal sols and solids loaded with metal nanoparticles. Metal sol is an early SERS substrate used in SERS detection. Its preparation method is relatively simple and the technology is mature. However, when using meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65C04B35/01C04B35/622
Inventor 娄秀涛赵晓荣王浩若徐连杰哈斯乌力吉吕志伟
Owner HARBIN INST OF TECH
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