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Method for preparing carbon doped zinc oxide

A technology of zinc oxide and zinc gluconate, applied in the direction of zinc oxide/zinc hydroxide, etc., can solve the problems of harsh conditions, complicated process, unfavorable industrialization, etc., and achieve the effect of short reaction time, good repeatability and uniform particle size

Inactive Publication Date: 2014-01-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned preparation methods all need to add structure-directing agents to the reaction system or add substances such as urea and carbon source to participate in the synthesis. The conditions are harsh and the process is complicated, which is not conducive to industrialization.

Method used

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  • Method for preparing carbon doped zinc oxide
  • Method for preparing carbon doped zinc oxide
  • Method for preparing carbon doped zinc oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Dissolve zinc gluconate in water to obtain a zinc gluconate solution, and then use 0.2mol / L NaOH solution as a pH regulator to adjust the pH of the zinc gluconate solution to 6; among them, the gluconic acid in the zinc gluconate solution The concentration of zinc is 0.1mol / L;

[0023] 2) Add the pH-adjusted zinc gluconate solution into a microwave digestion tank, then move the microwave digestion tank into a microwave hydrothermal synthesizer, perform a synthesis reaction at 180°C for 3 hours, and then cool naturally to room temperature to obtain the product;

[0024] 3) Centrifuge the product to collect the solid, then wash the solid with deionized water and absolute ethanol, and dry it to obtain a brown zinc oxide precursor;

[0025] 4) The product was calcined in an air atmosphere at 200°C for 2 hours, and cooled naturally to room temperature to obtain carbon-doped zinc oxide.

[0026] The visible light absorption intensity of the carbon-doped zinc oxide obtaine...

Embodiment 2

[0028] 1) Dissolve zinc gluconate in water to obtain a zinc gluconate solution, and then use 1mol / L NaOH solution as a pH regulator to adjust the pH of the zinc gluconate solution to 8; among them, zinc gluconate in the zinc gluconate solution The concentration is 1mol / L;

[0029] 2) Add the pH-adjusted zinc gluconate solution into a microwave digestion tank, then move the microwave digestion tank into a microwave hydrothermal synthesizer, perform a synthesis reaction at 250°C for 1 hour, and then cool naturally to room temperature to obtain the product;

[0030] 3) Centrifuge the product to collect the solid, then wash the solid with deionized water and absolute ethanol, and dry it to obtain a brown zinc oxide precursor;

[0031] 4) The product was calcined at 400°C in an air atmosphere for 0.5 hours, and cooled naturally to room temperature to obtain carbon-doped zinc oxide.

[0032] The visible light absorption intensity of the carbon-doped zinc oxide obtained in this exam...

Embodiment 3

[0034] 1) Dissolve zinc gluconate in water to obtain a zinc gluconate solution, and then use 0.5mol / L NaOH solution as a pH regulator to adjust the pH of the zinc gluconate solution to 7; among them, the gluconic acid in the zinc gluconate solution The concentration of zinc is 0.5mol / L;

[0035] 2) Add the pH-adjusted zinc gluconate solution into a microwave digestion tank, then move the microwave digestion tank into a microwave hydrothermal synthesizer, perform a synthesis reaction at 200°C for 2 hours, and then cool naturally to room temperature to obtain the product;

[0036] 3) Centrifuge the product to collect the solid, then wash the solid with deionized water and absolute ethanol, and dry it to obtain a brown zinc oxide precursor;

[0037] 4) The product was calcined in an air atmosphere at 300°C for 1 hour, and cooled naturally to room temperature to obtain carbon-doped zinc oxide.

[0038] The visible light absorption intensity of the carbon-doped zinc oxide obtained...

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Abstract

The invention provides a method for preparing carbon doped zinc oxide. The method comprises the following steps: dissolving zinc gluconate in water to obtain a zinc gluconate solution, and then, regulating pH value of the zinc gluconate solution to be 6-8; adding the zinc gluconate solution, of which pH value is regulated, into a microwave hydrothermal synthesis instrument, performing a synthetic reaction at 180-250 DEG C, and then, cooling naturally to room temperature to get a product; centrifugally separating the product, collecting solid, and then, washing and drying the solid to obtain a brown zinc oxide precursor; and calcining the brown zinc oxide precursor to obtain the carbon doped zinc oxide. The method has the characteristics of short reaction time, high efficiency and excellent repeatability; the zinc gluconate is used as the raw material, thus, the method is environmental-friendly and pollution-free. The carbon doped zinc oxide prepared by the method has uniform granularity, has a loose and porous structure, and has the characteristics of high specific surface area, high purity, excellent carbon doping amount controllability and good visible light absorption.

Description

technical field [0001] The invention belongs to the technical field of semiconductor material preparation, and in particular relates to a preparation method of carbon-doped zinc oxide. Background technique [0002] ZnO is a new type of direct bandgap semiconductor material. Its forbidden band width is 3.2eV, and the exciton binding energy is 60meV. It has excellent photoelectric properties and can be widely used in light-emitting diodes, photocatalysis, solar cells, and gas sensors. , biosensors and other fields have attracted the attention of scientific and technological workers. In recent years, with the rapid development of nanotechnology, nano-ZnO with different shapes has been prepared by various methods, showing many unique physical and chemical properties. Among them, the photocatalytic properties of nano-ZnO are favored by researchers. At present, people have done a lot of research on it, but they mainly focus on controlling the morphology of ZnO, increasing its sp...

Claims

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Application Information

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IPC IPC(8): C01G9/02
Inventor 欧阳海波李翠艳黄剑锋曹丽云殷立雄费杰
Owner SHAANXI UNIV OF SCI & TECH
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