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Mercury ion photo-electrochemical sensor working electrode and manufacturing method and application thereof

A working electrode and photoelectrochemical technology, which is applied in the field of chemical analysis and detection, can solve problems such as the difficulty in realizing the long-term stability of photosensitized materials and accurately control sensors, and achieve good development prospects, high selectivity, and good specificity recognition.

Active Publication Date: 2016-07-20
SHANGQIU NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes it difficult to achieve precise control of the photosensitizing material and maintain the long-term stability of the sensor

Method used

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  • Mercury ion photo-electrochemical sensor working electrode and manufacturing method and application thereof
  • Mercury ion photo-electrochemical sensor working electrode and manufacturing method and application thereof
  • Mercury ion photo-electrochemical sensor working electrode and manufacturing method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1: Preparation of photoelectrochemical sensor working electrode

[0035] Sonicate the FTO glass with acetone, isopropanol, ethanol, and deionized water in sequence, rinse with deionized water, and blow dry with nitrogen. Prepare the reaction solution for synthesizing titanium dioxide nanowires: 7.5mL deionized water, 6mL concentrated hydrochloric acid, 1.5mL saturated sodium chloride solution, 0.3mL n-butyl titanate. The reaction solution and the cleaned FTO glass substrate were placed in a muffle furnace and reacted at 180° C. for 12 hours to obtain a titania nanowire array. The prepared titanium dioxide nanowire array was placed in a solution of 100 μL of 3-aminopropyltriethoxysilane and 10 mL of isopropanol, and incubated at 100° C. for 1 hour to obtain an aminated titanium dioxide nanowire electrode. Then place the aminated titanium dioxide nanowire electrode in a DCM solution containing 0.3mM N3 dye molecules and equimolar amounts of DCC and HOBT, and r...

Embodiment 2

[0036] Embodiment 2: to the photoelectrochemical detection of mercury ion

[0037] The titanium dioxide nanowire array electrode modified by dye molecules prepared in Example 1 was used as the working electrode, the silver / silver chloride electrode was used as the reference electrode, and the platinum wire was used as the counter electrode to assemble a photoelectrochemical detection system for mercury ions. The working electrode was treated with different concentrations of mercury ion solutions, and its photoelectrochemical response was tested. The results are as follows: image 3 shown. The change value of photocurrent to Hg 2+ Concentration plotting, Hg 2+ Concentration at 0.5nmol·L -1 –50.0μmol·L -1 In the range, there is a good linear relationship between the two ( Figure 4 ), so Hg in this concentration range can be achieved 2+ quantitative detection. And the detection of mercury ions by the photoelectrochemical sensor is not affected by some other common cations...

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Abstract

The invention discloses a mercury ion photo-electrochemical sensor working electrode and a manufacturing method and an application thereof, and belongs to the technical field of chemical analysis detection. The manufacturing method of the photo-electrochemical sensor working electrode comprises the following steps: performing hydro-thermal synthesis on titanium dioxide nanowires on FTO conductive glass to form amination titanium dioxide nanowires; coupling photosensitive molecules with the amination titanium dioxide nanowires through chemical bonding to obtain the working electrode. The sensor working electrode has the advantages of high selectivity and high sensitivity to mercury ions, the response speed is high, the response range is 0.5nmol.L<-1>-50mumol.L<-1>, and the detection limit is up to 0.15nmol.L<-1>. Accurate control on mercury ion recognition by a mercury ion photo-electrochemical sensor is enhanced, a stable photosensitive dye molecular structure contributes to keeping of sensor stability, and the working electrode has a good development prospect.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis and detection, and in particular relates to a mercury ion photoelectrochemical sensor working electrode, a preparation method and its application in detecting mercury ions. Background technique [0002] Mercury ion (Hg 2+ ) is a highly toxic heavy metal ion. Ingestion of mercury can lead to a series of serious medical conditions, including kidney failure, brain damage, cognitive and motor impairment, etc. The mercury-containing emissions produced in the industry will be absorbed by various animals and plants in nature, and will be enriched in the food chain to produce more toxic methylmercury through biological reactions. Therefore, it is very necessary to develop a highly sensitive and effective method for detecting mercury ions for the monitoring of environmental safety. Traditional methods for detecting mercury ions mainly include atomic spectroscopy, inductively coupled plasma mas...

Claims

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Application Information

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IPC IPC(8): G01N27/30
CPCG01N27/305
Inventor 郝远强张银堂朱旭刘保霞常竹崔亚丽孙稳重刘书平瞿鹏徐茂田
Owner SHANGQIU NORMAL UNIVERSITY
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