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Application of Au/ZnO composite material in photoelectrochemical sensor electrode

A sensor electrode, photoelectrochemical technology, applied in the direction of material electrochemical variables, scientific instruments, analytical materials, etc., can solve the problems of potential safety hazards, difficult to achieve online detection, large equipment and other problems, to improve detection sensitivity and save detection time. , Improve the effect of photoelectric performance

Pending Publication Date: 2022-06-03
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, PNP has stable chemical properties, long half-life, and will exist in the environment for a long time. Therefore, because people use PNP in large quantities in production, it has caused serious damage to the environment. EPA and EEA successively listed PNP as a priority in 1980 and 2000. In the list of monitored industrial wastewater pollutants
[0003] At present, the conventional detection methods of PNP are gas chromatography, high performance liquid chromatography, and surface-enhanced Raman scattering method. Due to the large and expensive instruments and equipment used in these methods, and high operating costs, there are potential safety hazards and the detection timeliness is not strong. Difficult to achieve online detection
Although some researchers have developed detection methods such as fluorescence, electrochemistry, and electrophoresis, these methods also have the disadvantages of insufficient detection limit and insufficient transient response. Therefore, it is necessary to develop another transient detection method with high sensitivity and low detection limit.

Method used

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  • Application of Au/ZnO composite material in photoelectrochemical sensor electrode
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  • Application of Au/ZnO composite material in photoelectrochemical sensor electrode

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Embodiment 1

[0030] refer to figure 1 , this embodiment proposes a photoelectrochemical sensor electrode, the preparation method of which includes the following steps:

[0031] (1) in the selenium powder solution that concentration is 0.02mol / L (dissolve 0.4mmol Se powder in 20mL 80wt% hydrazine hydrate solution and obtain), drip the zinc chloride aqueous solution (0.2mmol ZnCl) that concentration is 0.01mol / L 2 Dissolved in 20 mL of ultrapure water), stirred and mixed for 1 hour, and then hydrothermally reacted at 180 ° C for 12 hours. After the end, the precipitate was washed with hydrazine hydrate centrifugation 3 times to remove excess selenium powder, and then the precipitate was centrifuged with water until neutral. Finally, the precipitate was washed twice with ethanol to remove water, yielding ZnSe 0.5N 2 H 4 nanoribbons;

[0032] (2) 0.2mmol ZnSe·0.5N 2 H 4 The nanobelts were dissolved in 70 mL of ethanol solution, and after stirring for 10 min, 400 μL of HAuCl with a concent...

Embodiment 2

[0038] This embodiment proposes a photoelectrochemical sensor electrode, and the preparation method includes the following steps:

[0039] (1) in the selenium powder solution that concentration is 0.02mol / L (dissolve 0.4mmol Se powder in 20mL 80wt% hydrazine hydrate solution and obtain), drip the zinc chloride aqueous solution (0.2mmol ZnCl) that concentration is 0.01mol / L 2 Dissolved in 20 mL of ultrapure water), stirred and mixed for 1 hour, and then hydrothermally reacted at 180 ° C for 12 hours. After the end, the precipitate was first centrifuged with hydrazine hydrate for 3 times to remove excess selenium powder, and then the precipitate was centrifuged with water until neutral. Finally, the precipitate was washed twice with ethanol to remove water, resulting in white ZnSe 0.5N 2 H 4 nanoribbons;

[0040] (2) 0.2mmol ZnSe·0.5N 2 H 4 The nanoribbons were dissolved in 70 mL of ethanol solution, and after stirring for 10 min, 200 μL of HAuCl with a concentration of 5 mm...

Embodiment 3

[0046] This embodiment proposes a photoelectrochemical sensor electrode, and the preparation method includes the following steps:

[0047] (1) in the selenium powder solution that concentration is 0.02mol / L (dissolve 0.4mmol Se powder in 20mL 80wt% hydrazine hydrate solution and obtain), drip the zinc chloride aqueous solution (0.2mmol ZnCl) that concentration is 0.01mol / L 2 Dissolved in 20 mL of ultrapure water), stirred and mixed for 1 hour, and then hydrothermally reacted at 180 ° C for 12 hours. After the end, the precipitate was first centrifuged with hydrazine hydrate for 3 times to remove excess selenium powder, and then the precipitate was centrifuged with water until neutral. Finally, the precipitate was washed twice with ethanol to remove water, resulting in white ZnSe 0.5N 2 H 4 nanoribbons;

[0048] (2) 0.2mmol ZnSe·0.5N 2 H 4 The nanobelts were dissolved in 70 mL of ethanol solution, and after stirring for 10 min, 600 μL of HAuCl with a concentration of 5 mmol...

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Abstract

The invention provides an application of an Au / ZnO composite material in a photoelectrochemical sensor electrode, the Au / ZnO composite material comprises Au nanoparticles and a porous ZnO nanobelt, and the Au nanoparticles are uniformly loaded on the surface of the porous ZnO nanobelt. According to the application of the Au / ZnO composite material in the photoelectrochemical sensor electrode, the wavelength of absorbed light of a wide bandgap semiconductor ZnO is widened through localized surface plasmon resonance of Au nanoparticles, so that the photoelectric property of the ZnO material is improved, and after the Au / ZnO composite material is applied to a photoelectrochemical sensor, the photoelectric property of the ZnO material is improved. And specific response and high-sensitivity detection on 4-nitrophenol (PNP) can be realized.

Description

technical field [0001] The invention relates to the technical field of photoelectrochemical detection, in particular to the application of an Au / ZnO composite material in a photoelectrochemical sensor electrode. Background technique [0002] 4-Nitrophenol (PNP) is an important intermediate raw material, which plays a very important role in chemical production such as pesticides and medicines. However, PNP has stable chemical properties, long half-life, and will exist in the environment for a long time. Therefore, due to the large-scale use of PNP in production, which has caused serious damage to the environment, EPA and EEA successively listed PNP in 1980 and 2000. Inventory of monitored industrial wastewater pollutants. [0003] At present, the conventional detection methods of PNP are gas chromatography, high performance liquid chromatography, and surface-enhanced Raman scattering method. Because the instruments and equipment used in these methods are large and expensive,...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/403
CPCG01N27/30G01N27/403Y02W10/37
Inventor 王卓郭正
Owner ANHUI UNIVERSITY
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