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Preparation method for carbon-tantalum co-doped bismuth oxychloride powder

A technology of co-doping and bismuth oxychloride is applied in the field of photocatalytic materials to achieve the effects of degradation, less experimental procedures and wide sources of raw materials

Active Publication Date: 2019-04-02
XIAN UNIV OF TECH
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Problems solved by technology

However, there are still relatively few reports on the co-doping of metal ions and non-metal ions. Therefore, it is necessary to develop a BiOCl material co-doped with metal ions and non-metal ions that has high degradation efficiency for organic pollutants such as dyes under visible light. especially important

Method used

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  • Preparation method for carbon-tantalum co-doped bismuth oxychloride powder
  • Preparation method for carbon-tantalum co-doped bismuth oxychloride powder
  • Preparation method for carbon-tantalum co-doped bismuth oxychloride powder

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preparation example Construction

[0020] The invention relates to a preparation method of bismuth oxychloride powder co-doped with carbon and tantalum. The bismuth oxychloride powder co-doped with carbon and tantalum is prepared by a one-step hydrothermal method of bismuth nitrate pentahydrate, tantalum chloride and an organic solvent. Specifically follow the steps below:

[0021] Step 1: Weigh bismuth nitrate pentahydrate and tantalum chloride at a molar ratio of 1:1-3, add them to organic solvents for dissolution, and disperse evenly by ultrasonication for 15-30 minutes.

[0022] The mass-volume ratio of bismuth nitrate pentahydrate to the organic solvent is 0.02-0.04 g / ml, and the mass-volume ratio of the tantalum chloride to the organic solvent is 0.004-0.006 g / ml.

[0023] The organic solvent is any one of ethylene glycol, ethanol, glycerol, and isopropanol.

[0024] Step 2: Add the two solutions into a polytetrafluoroethylene high-pressure reaction kettle, stir and mix evenly, and place in an oven, heat...

Embodiment 1

[0027] Weigh bismuth nitrate pentahydrate and tantalum chloride according to the molar ratio of 1:1, add them to ethylene glycol respectively, and ultrasonically dissolve them completely for 15 minutes. The mass-volume ratio of bismuth nitrate pentahydrate and organic solvent is 0.02g / ml The mass volume ratio of tantalum oxide to organic solvent is 0.004g / ml. Then, the bismuth nitrate pentahydrate and the tantalum chloride solution were mixed in a clean polytetrafluoroethylene autoclave lining under strong magnetic stirring, and the mixed solution was stirred strongly magnetically for 30 minutes. Finally, cover the high-pressure reaction kettle with the uniform mixed solution with a matching stainless steel shell, move it into an oven and keep it warm at 160°C for 12 hours for hydrothermal reaction. After air-cooling in the furnace, the solid-liquid mixture was centrifuged and washed three times with deionized water and absolute ethanol respectively, and then dried in an oven ...

Embodiment 2

[0033] Weigh bismuth nitrate pentahydrate and tantalum chloride according to the molar ratio of 1:2, add them to ethylene glycol respectively, and ultrasonically dissolve them completely for 20 minutes. The mass-volume ratio of bismuth nitrate pentahydrate and organic solvent is 0.03g / ml The mass volume ratio of tantalum oxide to organic solvent is 0.005g / ml. Then, bismuth nitrate pentahydrate and tantalum chloride solution were mixed in a clean polytetrafluoroethylene autoclave lining under strong magnetic stirring, and the mixed solution was stirred strongly magnetically for 25 minutes. Finally, cover the high-pressure reaction kettle with the uniform mixed solution with a matching stainless steel shell, move it into an oven and keep it warm for 12 hours at 150°C for hydrothermal reaction. After air-cooling in the furnace, the solid-liquid mixture was centrifuged and washed three times with deionized water and absolute ethanol respectively, and then dried in an oven at 55°C ...

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Abstract

The invention discloses a preparation method for carbon-tantalum co-doped bismuth oxychloride powder. The preparation method comprises the following steps: separately dissolving bismuth nitrate pentahydrate and tantalum chloride into an organic solvent, then mixing two solutions, carrying out a hydrothermal reaction, and after the reaction is completed, carrying out washing and drying so as to obtain the carbon-tantalum co-doped bismuth oxychloride powder. According to the invention, the carbon-tantalum co-doped bismuth oxychloride powder is prepared from common green raw materials by modification of BiOCl through a hydrothermal method. The bismuth oxychloride powder obtained by using the preparation method provided by the invention can realize visible light response, has good dispersity and size uniformity, improves the photocatalytic activity of a material by enlarging the specific surface area of a photocatalyst, increasing reaction active sites and changing the energy band structure and the forbidden band width of the material, and has a significant degradation effect on organic pollutants like a dye at the same time.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a preparation method of carbon-tantalum co-doped bismuth oxychloride powder. Background technique [0002] Photocatalytic technology is a green technology with important application prospects in the fields of energy and the environment. Under the irradiation of light, organic pollutants can be completely degraded into carbon dioxide and water. At the same time, the photocatalytic material itself has no loss. Century's revolutionary breakthrough in the field of environmental purification, known as "the most ideal environmental purification technology in the world today". [0003] BiOCl photocatalyst has become a research hotspot in the past ten years because of its special layered structure. Compared with traditional photocatalyst TiO 2 Compared to its [Bi 2 o 2 ] 2+ The lamellar structure formed by the alternating arrangement of layers and double...

Claims

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Application Information

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IPC IPC(8): B01J27/06
CPCB01J27/06B01J35/39
Inventor 孙少东陶莎莎梁淑华崔杰杨卿
Owner XIAN UNIV OF TECH
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