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Zinc oxide/tin dioxide photoelectrode with diamond structure and its preparation method and application

A diamond-shaped structure and tin dioxide technology, which is applied in chemical instruments and methods, separation methods, light water/sewage treatment, etc., can solve the problems of cleanliness, energy saving, efficient preparation of photocatalytic films, unfavorable photocatalytic degradation of film structures, The degree of substrate bonding is not firm, etc., to achieve the effect of less defects, orderly arrangement of bonding height, and strong bonding force

Active Publication Date: 2019-09-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each method has its own advantages and disadvantages, and the preparation cost is also an important factor that must be considered
The thin film structure prepared by the existing method is not conducive to photocatalytic degradation, the repeatability is not high, the environmental pollution is large, and the degree of bonding with the substrate is not strong, etc., there are more or less problems in the preparation of "clean, energy-saving and efficient photocatalytic thin films". "This concept

Method used

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  • Zinc oxide/tin dioxide photoelectrode with diamond structure and its preparation method and application
  • Zinc oxide/tin dioxide photoelectrode with diamond structure and its preparation method and application
  • Zinc oxide/tin dioxide photoelectrode with diamond structure and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Configuration of ZnO precursor solution:

[0038] Add NH to deionized water 4 F, then add Zn(NO 3 ) 2 ·6H 2 O, stirred at room temperature for 10 min until clear, then added NaOH solution, adjusted the pH to 6.0, and stirred for 10 min until clear to obtain a ZnO precursor; 4 F and Zn(NO 3 ) 2 ·6H 2 The molar ratio of O is 5:1; the concentration of Zn element in the ZnO precursor solution is 0.040mol / L;

[0039] 2) Functionalization of the substrate:

[0040] SnO 2 / The glass substrate was placed in water, acetone, and absolute ethanol for 10 minutes of ultrasonic cleaning. The washed SnO 2 / The glass substrate is irradiated with 184.9nm ultraviolet light for 30min to make SnO 2 / The surface of the glass substrate forms a hydroxyl monolayer, that is, the glass / SnO 2 -OH - hydroxyl layer;

[0041] 3) Self-assembly of thin films:

[0042] Glass / SnO 2 -OH - The hydroxyl layer was suspended on the surface of the ZnO precursor solution at 70°C for self-...

Embodiment 2

[0048] 1) Configuration of ZnO precursor solution:

[0049] Add NH to deionized water 4 F, then add Zn(NO 3 ) 2 ·6H 2 O, stirred at room temperature for 15min until clear, then added NaOH solution, adjusted the pH to 5.0, and stirred for 15min until clear to obtain a ZnO precursor; 4 F and Zn(NO 3 ) 2 ·6H 2 The molar ratio of O is 6:1; the concentration of Zn element in the ZnO precursor solution is 0.050mol / L;

[0050] 2) Functionalization of the substrate:

[0051] SnO 2 / The glass substrate was placed in water, acetone, and absolute ethanol for 10 minutes of ultrasonic cleaning. The washed SnO 2 / The glass substrate is irradiated with 184.9nm ultraviolet light for 20min to make the SnO 2 / The surface of the glass substrate forms a hydroxyl monolayer, that is, the glass / SnO 2 -OH - hydroxyl layer;

[0052] 3) Self-assembly of thin films:

[0053] Glass / SnO 2 -OH - The hydroxyl layer was suspended on the surface of the ZnO precursor solution at 55°C for sel...

Embodiment 3

[0059] 1) Configuration of ZnO precursor solution:

[0060] Add NH to deionized water 4 F, then add Zn(NO 3 ) 2 ·6H 2 O, stirred at room temperature for 20min until clear, then added NaOH solution, adjusted the pH to 7.0, and stirred for 20min until clear to obtain a ZnO precursor; 4 F and Zn(NO 3 ) 2 ·6H 2 The molar ratio of O is 7:1; the concentration of Zn element in the ZnO precursor solution is 0.060mol / L;

[0061] 2) Functionalization of the substrate:

[0062] SnO 2 / The glass substrate was placed in water, acetone, and absolute ethanol for 10 minutes of ultrasonic cleaning. The washed SnO 2 / The glass substrate is irradiated with 184.9nm ultraviolet light for 40min to make SnO 2 / The surface of the glass substrate forms a hydroxyl monolayer, that is, the glass / SnO 2 -OH - hydroxyl layer;

[0063] 3) Self-assembly of thin films:

[0064] Glass / SnO 2 -OH - The hydroxyl layer was suspended on the surface of the ZnO precursor solution at 85°C for self-ass...

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Abstract

The invention provides a zinc oxide / tin dioxide photoelectrode with a diamond structure, a preparation method of the photoelectrode and an application. ZnO precursor solution is prepared, a SnO2 / glass substrate is irradiated by ultraviolet light, a hydroxy monomolecular layer is formed on the surface of the SnO2 / glass substrate, reverse induced small molecules [(ZnO)2+NO3-]+ are self-assembled layer by layer by the aid of electrostatic adsorption of the hydroxy monomolecular layer and [(ZnO)2+NO3-]+ in the ZnO precursor solution, an amorphous glass / SnO2-O-ZnO composite film is prepared, and finally, insulated crystallization is performed at the temperature of 500 DEG C to obtain the periodic arranged zinc oxide / tin dioxide photoelectrode with the diamond structure. The technological process is simple and easy to control, experimental condition requirements are low, the prepared ZnO / SnO2 photoelectrode is high in light utilization rate and current density and suitable for photocatalytic degradation of organic pollutants in water or air, and has a wide application prospect in the field of photocatalysis.

Description

technical field [0001] The invention belongs to the field of functional materials, and specifically relates to a molecular recognition adsorption layer-by-layer self-assembly technology to prepare a diamond-shaped zinc oxide / tin dioxide photoelectrode, a preparation method and an application thereof. Background technique [0002] Energy crisis and environmental pollution are two potential challenges restricting the sustainable development of human society and economy in the 21st century. It has become a broad consensus in the world today to develop clean new energy technologies to deal with the challenges. It is considered to be one of the effective ways to solve the energy crisis and environmental pollution problems. In recent decades, the scientific and technological community has continued to invest huge research resources in the field of photocatalysis, and related research on the application of semiconductor materials to photocatalysis has become the focus and focus of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23C02F1/30B01D53/86
Inventor 谈国强张昕蕾许驰任慧君夏傲邵丹
Owner SHAANXI UNIV OF SCI & TECH