Sulfur ion concentration detection method

A detection method, sulfide ion technology, applied in the preparation of test samples, measurement of color/spectral characteristics, electrochemical variables of materials, etc., can solve the problems of high time cost, complicated operation, high detection cost, etc., and achieve low limit determination Effect

Active Publication Date: 2020-08-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of expensive equipment, high detection cost, complicated operation, low reliability and high time cost of the existing s...

Method used

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  • Sulfur ion concentration detection method
  • Sulfur ion concentration detection method
  • Sulfur ion concentration detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Bi 2 o 3 Fabrication of Thin Film Electrode and Its Photoelectrochemical Detection of Sulfur Ion Concentration in Water

[0074] The method for rapid photoelectrochemical detection of sulfur ion concentration in water body provided by Embodiment 1 of the present invention uses a chemical water bath method to deposit Bi 2 o 3 Taking the thin film as the working electrode as an example, it mainly includes the following steps:

[0075] (1) Preparation of photoelectric sensing electrodes

[0076] ① Pretreatment of conductive substrate

[0077] Cut the FTO into 2cm*3cm size, after cleaning with surfactant, ultrasonic cleaning with ultrapure water, ethanol, acetone, and ultrapure water respectively for 15min, and N 2 It was blown dry, and then cleaned with a surface plasma cleaner for 5 minutes.

[0078] ② Preparation of photoelectric sensing electrode materials

[0079] Weigh 2.91g of bismuth nitrate in a beaker, add 2mL of concentrated nitric acid to it, and then add...

Embodiment 2

[0091] Bi 2 o 2.33 Fabrication of Thin Film Electrode and Its Photoelectrochemical Detection of Sulfur Ion Concentration in Water

[0092] A method for detecting the concentration of sulfur ions in water, depositing Bi with a chemical water bath method 2 o 2.33 Taking the thin film as the working electrode as an example, it mainly includes the following steps:

[0093] (1) Preparation of electrodes

[0094] ① Pretreatment of conductive substrate

[0095] Cut the ITO to a size of 5cm*5cm, wash it with a surfactant, and then ultrasonically clean it with ultrapure water, ethanol, acetone, and ultrapure water for 15 minutes, and wash it with N 2 It was blown dry, and then cleaned with a surface plasma cleaner for 5 minutes.

[0096] ② Preparation of precursor solution

[0097] A certain amount of nitric acid was slowly added to 4 mL of deionized water to obtain liquid A, and then 1 g of bismuth nitrate was added. Under continuous stirring, add a certain amount of Triton X-...

Embodiment 3

[0111] Bi 2 o 3 Preparation of thin film electrode and its visual colorimetric detection of sulfur ion concentration in water

[0112] In the method for rapid visual colorimetric detection of sulfur ion concentration in water body provided by Embodiment 1 of the present invention, Bi is deposited by a chemical water bath method. 2 o 3 Taking the thin film as the working electrode as an example, it mainly includes the following steps:

[0113] (1) Preparation of film

[0114] ①Pretreatment of non-conductive substrates

[0115] Cut the glass into 2cm*3cm size, wash it with surfactant, then ultrasonically clean it with ultrapure water, ethanol, acetone, and ultrapure water for 15 minutes respectively, and wash it with N 2 It was blown dry, and then cleaned with a surface plasma cleaner for 5 minutes.

[0116] ②Preparation of film materials

[0117]Weigh 2.91g of bismuth nitrate in a beaker, add 2mL of concentrated nitric acid to it, and then add deionized water to prepare ...

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Abstract

The invention relates to the field of trace sulfur ion (S<2->) analysis and detection, and particularly discloses a sulfur ion concentration visualization and photoelectrochemical detection method. The method comprises the following steps: putting a sensing material coated with an active film into a to-be-detected solution containing sulfur ions for pretreatment; and then detecting the pretreatedsensing material by adopting a visual colorimetric method or a photoelectrochemical method to obtain the ion concentration of S<2-> in the to-be-detected solution. The active thin film is made of a metal oxide or a heterojunction formed by the metal oxide and other semiconductor metals; the chemical formula of the metal oxide is MxOy-z. According to the invention, the active film of the metal oxide and the heterojunction thereof is innovatively used as a sensing material; innovatively, the mutual surface action between the sensing material and the S<2-> in the solution accidentally has excellent linear interrelation in the aspects of visual colorimetry and photoelectrochemistry, and the visualization of the S<2-> in the solution and the rapid, accurate and low-limit measurement of the photoelectrochemistry can be realized.

Description

technical field [0001] The present invention relates to trace sulfide ion (S 2- ) analysis and detection field, in particular to a rapid visual colorimetric and photoelectrochemical detection method for sulfur ion concentration. Background technique [0002] Quantitative analysis of sulfide ion plays an extremely important role in environmental detection, biochemistry, food industry and other fields. First, sulfide pollution can paralyze the respiratory system and irritate the skin. Long-term exposure to high concentrations of S 2- The environment can cause diabetes, liver cirrhosis, Alzheimer's disease and Down's syndrome, and even short-term exposure can cause symptoms such as nausea and dizziness. Under acidic conditions, S 2- will be protonated to form H 2 S, inhalation of a small amount of high concentration of H 2 S can be fatal in a short time, while low concentrations of H 2 S has effects on eyes, respiratory system and central nervous system. Therefore, the ...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N21/29G01N21/27G01N27/26G01N27/30
CPCG01N1/28G01N21/27G01N21/29G01N27/26G01N27/30
Inventor 蒋良兴王天意彭阳王君刘芳洋贾明赖延清李劼
Owner CENT SOUTH UNIV
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