Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of SERS active material for measuring chromate ion and preparation method thereof

A technology of active materials and chromate, which is applied in the field of SERS active materials and its preparation, can solve the problems of high professional skill requirements for operators, complicated pretreatment and detection process, and long detection time, so as to improve detection sensitivity, efficiency and repeatability The effect of strong selective adsorption performance

Active Publication Date: 2021-10-15
WUHAN INSTITUTE OF TECHNOLOGY
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the detection sensitivity of these methods meets the requirements, these methods have disadvantages such as expensive instruments, complicated sample pretreatment and detection processes, high requirements for professional skills of operators, and long detection time.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of SERS active material for measuring chromate ion and preparation method thereof
  • A kind of SERS active material for measuring chromate ion and preparation method thereof
  • A kind of SERS active material for measuring chromate ion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for preparing a SERS active material for measuring chromate ions, comprising the steps of:

[0034] (1) Preparation of silver nanospheres: 90mg AgNO 3 Dissolve in 400mL water to make a homogeneous solution, in addition, dissolve 250mg tannic acid and 360mg trisodium citrate in 100mL water, heat the two solutions to 60°C in a water bath, and then mix the two solutions under vigorous stirring, After the reaction solution was maintained at 60° C. for 5 minutes, the reaction solution was boiled for 20 minutes. After the reaction, the reaction solution was cooled to room temperature, and then centrifuged to obtain silver nanospheres with a particle size of about 35nm. After repeated washing with ethanol and water for several times, they were dispersed in ethanol to prepare silver nanospheres with a mass concentration of 6.5mg / mL. ball dispersion.

[0035] (2) Preparation of silver / zirconia: Add 36mL of ethanol, 12mL of acetonitrile and 0.1mL of ammonia water into ...

Embodiment 2

[0039] The preparation steps are the same as in Example 1, except that in step (1), after repeated washing with ethanol and water for several times, the silver nanosphere dispersion is dispersed in ethanol to form a silver nanosphere dispersion with a mass concentration of 5.2 mg / mL.

Embodiment 3

[0041] Detection of SERS activity of silver / zirconia / nano-silver composite materials:

[0042] Get the silver / zirconia / nano-silver composite material that embodiment 2 prepares to add concentration and be 10 -4 ~10 -9 In the 4-mercaptobenzoic acid of mol / L, carry out SERS spectrogram test, test result is as follows image 3 As shown, it can be seen from the spectrogram that the enhancement effect of Raman is very strong, the sensitivity is high, and the detection concentration of 4-mercaptobenzoic acid can reach 10 -9 mol / L.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a SERS active material for chromate ion detection and a preparation method thereof. It consists of an inner core, an intermediate layer coated on the surface of the inner core, and a shell coated on the surface of the intermediate layer. The inner core is In the silver nanosphere, the middle layer is a zirconium dioxide layer, and the outer shell is formed by gathering silver nanoparticles. The SERS active material based on the invention has high SERS activity, high sensitivity to detect chromate ions, simple operation, high detection efficiency, simple preparation method, mild reaction conditions, controllable reaction process, high efficiency and good repeatability.

Description

technical field [0001] The invention belongs to the technical field of heavy metal analysis and detection, and in particular relates to a SERS active material for measuring chromate ions and a preparation method thereof. Background technique [0002] With the rapid development of modern industries such as mining, smelting, electroplating, printing, and paint, the problem of heavy metal pollution in water caused by chromium (Cr) has become increasingly prominent. At present, the commonly used detection methods include inductively coupled plasma mass spectrometry (ICP-MS), atomic fluorescence spectroscopy (AFS), atomic absorption spectroscopy (AAS) and high performance liquid chromatography-mass spectrometry (HPLC-MS). Although the detection sensitivity of these methods meets the requirements, these methods have disadvantages such as expensive instruments, complicated sample pretreatment and detection processes, high requirements for professional skills of operators, and long ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/28B82Y30/00B82Y40/00C01G25/02C02F1/28G01N21/65
CPCB01J20/06B01J20/28009B82Y30/00B82Y40/00C01G25/02C02F1/281C02F2101/22C02F2303/16G01N21/658
Inventor 李菊梅周玲杨洁
Owner WUHAN INSTITUTE OF TECHNOLOGY