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Method for preparing nitrogen-doped photo-catalytic material containing gallium oxide at low temperature

A photocatalytic material, a technology of gallium oxide, applied in the field of low-temperature preparation of nitrogen-doped gallium-containing oxide photocatalytic materials, can solve the problems of mesoporous structure collapse and difficulty in preparing mesopores, and improve solar energy utilization rate and photocatalytic activity Effect

Inactive Publication Date: 2013-03-20
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the nitridation of oxides usually requires a higher temperature (generally higher than 600 °C), and the higher heat treatment temperature usually leads to the collapse of the mesoporous structure, which means that it is difficult to prepare nitrogen-doped mesoporous ZnGa 2 o 4 and Ga 2 o 3 Visible light-responsive photocatalytic materials

Method used

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  • Method for preparing nitrogen-doped photo-catalytic material containing gallium oxide at low temperature
  • Method for preparing nitrogen-doped photo-catalytic material containing gallium oxide at low temperature
  • Method for preparing nitrogen-doped photo-catalytic material containing gallium oxide at low temperature

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Effect test

Embodiment 1

[0032] Nitrogen doped mesoporous ZnGa 2 o 4 Preparation: Dissolve 0.2494g of sodium gallate powder in 15mL of deionized water, weigh 0.0145g of nickel nitrate and 0.2680g of zinc nitrate, dissolve in 15mL of deionized water, then pour 15mL of nickel nitrate and nitric acid solution into 15mL of gallium Sodium acid sodium solution, the mixed solution was stirred and reacted at room temperature for 0.5h, put into a 40mL hydrothermal kettle, and hydrothermally treated at 200°C for 3h, naturally cooled to room temperature, centrifuged and dried, and placed in a muffle furnace for 400 °C heat treatment for 30min to obtain nitrogen-doped mesoporous ZnGa 2 o 4 photocatalytic material. X-ray powder diffraction results show that the obtained sample is a spinel phase ZnGa 2 o 4 . TEM image showing ( image 3 a), the resulting ZnGa 2 o 4 The sample has a worm-like mesoporous structure, and the mesoporous structure is formed by the accumulation of 5-10nm nanoparticles. High-reso...

Embodiment 2

[0034] Nitrogen doped mesoporous ZnGa 2 o 4 Preparation: Dissolve 0.2494g of sodium gallate powder in 15mL of deionized water, weigh 0.0291g of nickel nitrate and 0.2673g of zinc nitrate, dissolve in 15mL of deionized water, then pour 15mL of nickel nitrate and nitric acid solution into 15mL of gallium Sodium acid sodium solution, the mixed solution was stirred and reacted at room temperature for 0.5h, put into a 40mL hydrothermal kettle, and hydrothermally treated at 200°C for 3h, naturally cooled to room temperature, centrifuged and dried, and placed in a muffle furnace for 400 °C heat treatment for 30min to obtain nitrogen-doped mesoporous ZnGa 2 o 4 photocatalytic material.

Embodiment 3

[0036] Nitrogen doped mesoporous ZnGa 2 o 4 Preparation: Dissolve 0.2494g of sodium gallate powder in 15mL of deionized water, weigh 0.0291g of nickel nitrate and 0.2673g of zinc nitrate, dissolve in 15mL of deionized water, then pour 15mL of nickel nitrate and nitric acid solution into 15mL of gallium Sodium acid sodium solution, the mixed solution was stirred at room temperature for 1 hour, put it into a 40mL hydrothermal kettle, and treated it at 180°C for 5 hours, cooled naturally to room temperature, centrifuged and dried, and placed in a muffle furnace at 450° C heat treatment for 30min to obtain nitrogen-doped mesoporous ZnGa 2 o 4 photocatalytic material.

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Abstract

The invention discloses a method for nitrogenizing a photo-catalytic material containing gallium oxide at a low temperature. The method comprises the following steps: mixing an acetic acid solution with a sodium gallate solution which is a raw material, carrying out hydrothermal treatment of the obtained solution mixture at 180-220DEG C for 2-4h, centrifuging, and drying to obtain hydroxy gallium oxide nano-sheets; and dissolving nickel nitrate, sodium gallate and sodium nitrate powders in deionized water to obtain a mixed solution, carrying out hydrothermal treatment of the mixed solution at 180-220DEG C for 4-6h, catalyzing the nitrate radical nitrogenization by NiGa2O4, centrifuging, drying, and carrying out thermal treatment of the obtained powder sample in a muffle furnace at 300-500DEG C to obtain the nitrogen-doped meso-porous Ga2O3 photo-catalytic material. The material prepared in the invention can be applied as a photo-catalyst in a photo-catalytic reaction.

Description

technical field [0001] The invention relates to a preparation method of a visible light photocatalytic material and its application in the field of photocatalysis, in particular to a low-temperature preparation method of a nitrogen-doped oxide photocatalytic material with a mesoporous structure. Background technique [0002] Photocatalytic technology has important applications in photocatalytic environmental purification, photocatalytic water splitting to produce hydrogen, and photocatalytic conversion of carbon dioxide into renewable fuels. In recent years, ZnGa 2 o 4 and Ga 2 o 3 As an important photocatalytic material, it has attracted much attention. It has been experimentally confirmed that ZnGa 2 o 4 and Ga 2 o 3 In the degradation of organic pollutants, water splitting and photocatalytic CO 2 Reduction has a good effect, and these two materials have good application prospects in the field of photocatalysis. But ZnGa 2 o 4 and Ga 2 o 3 Photocatalytic mate...

Claims

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Application Information

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IPC IPC(8): B01J27/24C07C9/04C07C1/02
Inventor 闫世成吴兆春邹志刚
Owner NANJING UNIV
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