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Bismuth-based photocatalytic material as well as preparation method and application thereof

A photocatalytic material and bismuth-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems that cuprous oxide cannot be fully applied and the photocatalytic efficiency is not high, and achieve photocatalytic The effect of catalytic degradation is excellent, the operation method is easy to operate, and the effect of increasing the specific surface area

Pending Publication Date: 2022-04-29
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Studies have shown that Cu 2 O has considerable photocatalytic properties, and composite catalysis is superior to single catalysis, but the current photocatalytic efficiency is still not high, and photocorrosion is also the reason why cuprous oxide cannot be fully applied.

Method used

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  • Bismuth-based photocatalytic material as well as preparation method and application thereof
  • Bismuth-based photocatalytic material as well as preparation method and application thereof
  • Bismuth-based photocatalytic material as well as preparation method and application thereof

Examples

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Embodiment 1

[0027] The invention provides a method for preparing a bismuth-based photocatalytic material. The specific steps include: under the protection of nitrogen, feed cuprous nitrate and bismuth nitrate according to the Cu / Bi molar ratio of 0.1, and dissolve them in 100mL with a volume fraction of 10%. Prepare a solution in acetic acid in ethylene glycol; add 100 mL of ethylene glycol solution containing 0.1 mol / L hexadecyltrimethylammonium bromide to the above solution; react at 180°C for 10 h and freeze-dry. The resulting sample is designated 10-CB.

Embodiment 2

[0029] The invention provides a method for preparing a bismuth-based photocatalytic material. The specific steps include: under the protection of nitrogen, feed cuprous nitrate and bismuth nitrate according to the Cu / Bi molar ratio of 0.2, and dissolve them in 100 mL of 10% Prepare a solution in acetic acid in ethylene glycol; add 100 mL of ethylene glycol solution containing 0.1 mol / L hexadecyltrimethylammonium bromide to the above solution; react at 180°C for 10 h and freeze-dry. The resulting sample is designated 20-CB.

Embodiment 3

[0031] The invention provides a method for preparing a bismuth-based photocatalytic material. The specific steps include: under the protection of nitrogen, feed cuprous nitrate and bismuth nitrate according to the Cu / Bi molar ratio of 0.4, and dissolve them in 100mL with a volume fraction of 10%. Prepare a solution in acetic acid in ethylene glycol; add 100 mL of ethylene glycol solution containing 0.1 mol / L hexadecyltrimethylammonium bromide to the above solution; react at 180°C for 10 h and freeze-dry. The resulting sample is designated 40-CB.

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Abstract

The invention provides a preparation method of a bismuth photocatalytic material, which comprises the following steps: dissolving cuprous salt and bismuth salt in an organic solvent, and uniformly mixing to obtain a solution A; and adding a bromine source into the solution A, reacting for a period of time at high temperature, and freeze-drying to obtain the product. According to the bismuth-based photocatalytic material prepared by the invention, Cu2O is introduced into a BiOBr catalytic material, so that the photocatalytic effect can be greatly improved, the specific surface area of the catalytic material can be increased, and the adsorption performance of the catalytic material can be enhanced. The preparation method is simple and easy to implement, raw materials are easy to obtain, the cost is low, and the practical application possibility is large. The prepared bismuth-based photocatalytic material has a very excellent photocatalytic degradation effect in the presence of hydrogen peroxide.

Description

technical field [0001] The invention relates to the technical field of catalytic materials, in particular to a bismuth-based photocatalytic material and its preparation method and application. Background technique [0002] Dye wastewater is a common industrial wastewater, which has the characteristics of complex chemical composition, high hardness and difficult to achieve complete degradation. The expected effect has not been achieved by general treatment methods. In recent years, the rapid development of photocatalytic technology in the treatment of such pollution provides an effective way for the degradation of dye wastewater. Among them, the degradation effect of bismuth-based oxides is particularly significant, and more importantly, bismuth-based oxides have a narrow band gap, which can fully absorb photons under visible light, resulting in a wider absorption range of visible light, so the photocatalytic activity under visible light more prominent. Due to these charact...

Claims

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Application Information

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IPC IPC(8): B01J27/06C02F1/30C02F1/72C02F101/34C02F101/38
CPCB01J27/06C02F1/30C02F1/722C02F2305/10C02F2101/34C02F2101/38C02F2101/40B01J35/39
Inventor 李忠群汤东升张世浪龙国庆何辉杨永飞
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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