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A method for selective detection of iodide ions in halide salts by photoelectrochemical technology

A photoelectrochemical and selective technology, applied in the direction of electrochemical variables of materials, can solve the problems of unstable signal and cumbersome operation, and achieve the effects of convenient operation, simple equipment and stable photoelectrode performance.

Inactive Publication Date: 2016-07-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the invention is to disclose a kind of photoelectrochemical technology detection I - method, by overcoming the problems of signal instability and cumbersome operation in the prior art

Method used

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  • A method for selective detection of iodide ions in halide salts by photoelectrochemical technology
  • A method for selective detection of iodide ions in halide salts by photoelectrochemical technology
  • A method for selective detection of iodide ions in halide salts by photoelectrochemical technology

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Embodiment 1

[0020] The reagent used in the implementation of the method of the present invention includes the following components: a support solution for the photocatalytic reaction, made of molybdenum-doped bismuth vanadate (Mo:BiVO 4 ) modified fluorine-doped tin oxide (FTO) conductive glass as photoelectrode. The devices used included a potentiostat and a photoelectrochemical analysis device. Using the above-mentioned photoelectrode as the working electrode, when the analyte exists, a certain potential is applied to the working electrode through the potentiostat, and at the same time, the excitation light is turned on to irradiate the photoelectrode to generate a photocurrent signal, and the photocurrent signal is detected by the potentiostat.

[0021] at 0.1molL -1 Na 2 SO 4 As a support solution, use 25molL -1 KF, 25molL -1 KCl, 25molL -1 KBr and 25molL -1 The mixture of KI is the solution to be tested, and the potential of the working electrode is set to 0.1 volts (three-ele...

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Abstract

The invention discloses a method for detecting iodide ions by photoelectrochemical technology. In the method, an electrode modified by a photoelectric active substance is used as a photoelectrode (working electrode). Under a certain potential (or voltage), the photoelectrode generates The photogenerated holes oxidize iodide ions and generate photocurrent signals. Then iodide ion is detected. The method of the invention has stable electrodes, reliable signals, and a large optional range of exciting light wavelengths, and can realize portable analysis.

Description

technical field [0001] The invention relates to photoelectrochemical technology, which is a kind of selective detection of iodide ion (I) in halide salt using photoelectric technology. - )Methods. Background technique [0002] f - , Cl - 、Br - , I - Their chemical properties are close, and they are often mixed with each other. Selective detection of iodide ions has always been a research topic. In the fields of environmental detection and drug analysis, selective detection of I -1 is of great significance. [0003] Traditional iodide ion detection methods include ion chromatography, volumetric analysis, ion selective electrode method, etc. These methods are cumbersome to operate, have limited anti-interference ability, and have high requirements for analysts. [0004] The photoelectrochemical process refers to the generation of photogenerated electrons and photogenerated holes by photoelectrically active materials after absorbing photons, and the photogenerated holes u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26
Inventor 潘建斌徐静娟陈洪渊
Owner NANJING UNIV
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