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Photoelectrochemical detection method for concentration of chloride ions in water body

A chloride ion concentration, photoelectrochemical technology, applied in electrochemical variables of materials, measuring devices, scientific instruments, etc., can solve the problems of high detection cost, high time cost, low sensitivity, etc., and achieve high sensitivity, low cost, and anti-interference. powerful effect

Active Publication Date: 2019-11-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly aims to provide a photoelectrochemical detection method for chloride ion concentration in water, aiming at solving the problems of strong toxicity, expensive equipment, high detection cost, low sensitivity and high time cost in existing chloride ion detection methods

Method used

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  • Photoelectrochemical detection method for concentration of chloride ions in water body
  • Photoelectrochemical detection method for concentration of chloride ions in water body
  • Photoelectrochemical detection method for concentration of chloride ions in water body

Examples

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preparation example Construction

[0040] (1) Preparation of photoelectric sensing electrodes

[0041] Including the pretreatment of the conductive substrate, the preparation of the precursor solution, and the growth of the photoelectric sensing electrode material.

[0042] (2) Drawing of standard curve

[0043] Prepare standard solutions containing chloride ions at different concentrations.

[0044] Putting the photoelectric sensing electrode prepared in step (1) into a standard solution containing chloride ions for pretreatment. Then, the pretreated photoelectric sensing electrode is used as the working electrode, and a three-electrode system is constructed with the auxiliary electrode and the reference electrode. Concentrations were linearly fitted to draw a standard curve.

[0045] (3) Photoelectrochemical detection of chloride ions in water

[0046] Putting the photoelectric sensing electrode prepared in step (1) into the solution to be tested containing chloride ions for pretreatment. The photorespon...

Embodiment 1

[0069] Bi 2 o 3 Fabrication of Thin Film Electrode and Its Photoelectrochemical Detection of Chloride Ion Concentration in Water

[0070] In the method for rapid photoelectrochemical detection of chloride ion concentration in water 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:

[0071] (1) Preparation of photoelectric sensing electrodes

[0072] ① Pretreatment of conductive substrate

[0073] 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.

[0074] ② Preparation of photoelectric sensing electrode materials

[0075] Weigh 2.91g of bismuth nitrate in a beaker, add 2mL of concentrated nitric acid to it, and then...

Embodiment 2

[0089] Preparation of BiOI thin film electrode and its photoelectrochemical detection of chloride ion concentration in water

[0090] The method for fast photoelectrochemical detection of chloride ion concentration in water body provided by Embodiment 2 of the present invention takes electrodeposited BiOI as a working electrode as an example, and mainly includes the following steps:

[0091] (1) Preparation of photoelectric sensing electrodes

[0092] ① Pretreatment of conductive substrate

[0093] The method of Example 1 is used to pretreat the substrate.

[0094] ② Preparation of photoelectric sensing electrode materials

[0095] Dissolve 3.32g KI in 50mL deionized water to prepare 0.4M KI solution, then add 0.97g Bi(NO 3 ) 3 ·5H 2 O prepare bismuth nitrate solution, add dilute HNO dropwise 3 The pH was adjusted to 1.7 and the solution was stirred until clear and reddish orange to give Solution 1. Dissolve 0.4968g p-benzoquinone in 20mL ethanol to prepare a 0.23M p-be...

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Abstract

The invention discloses a photoelectrochemical detection method for the concentration of chloride ions in a water body. According to the chloride ion photoelectrochemical detection method provided bythe invention, a bismuth-based compound film is used as a working electrode, a three-electrode system is constructed by the bismuth-based compound film, an auxiliary electrode and a reference electrode, and a heterostructure formed by BiOCl generated on the surface of an electrode material in situ and an original electrode material has enhanced photoresponse current under illumination. The determination of the concentration of the chloride ions in the water body is realized by utilizing the one-to-one correspondence relationship between the photoresponse current and the concentration of the chloride ions in the water body. The chloride ion detection method provided by the invention is environment-friendly, simple to prepare, low in cost, high in sensitivity, strong in selectivity and widein detection range, and can be widely applied to detection of the concentration of chloride ions in media such as water bodies and human blood.

Description

technical field [0001] The invention relates to the field of photoelectrochemical analysis and detection, in particular to a photoelectrochemical detection method for chloride ion concentration in water. Background technique [0002] The quantitative analysis of chloride ions plays an extremely important role in clinical medicine, biochemistry, environmental detection and other fields. First of all, both chloride ions and sodium ions are the most common ions in the extracellular fluid of the human body, of which chloride ions account for 70% of the total, and chloride ions are also involved in many physiological functions of the human body, so the determination of chloride ions is an important in clinical analysis. index. Secondly, chlorine gas is usually used in the disinfection of tap water. If the residual chlorine in the water is not treated, it will flow to domestic water, which will affect people's health. Therefore, the quantitative analysis and detection of chlorid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/333G01N27/36
CPCG01N27/305G01N27/333G01N27/36
Inventor 蒋良兴彭阳汪齐王君刘芳洋陈家威贾明赖延清李劼
Owner CENT SOUTH UNIV
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