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Hydrangea flower-cluster-shaped bismuth tungstate/biocarbon composite photocatalytic material, preparation method and application thereof

A technology of composite photocatalysis and biochar, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of limiting the industrialization process of materials, expensive raw materials, and complicated preparation processes, etc. Effects of catalytic activity, simplified process, and wide light absorption range

Inactive Publication Date: 2017-11-17
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the raw materials used in these methods are expensive, the preparation process is complicated, and the degradation efficiency still needs to be further improved, thus limiting the industrialization process of materials

Method used

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  • Hydrangea flower-cluster-shaped bismuth tungstate/biocarbon composite photocatalytic material, preparation method and application thereof
  • Hydrangea flower-cluster-shaped bismuth tungstate/biocarbon composite photocatalytic material, preparation method and application thereof
  • Hydrangea flower-cluster-shaped bismuth tungstate/biocarbon composite photocatalytic material, preparation method and application thereof

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preparation example Construction

[0032] The preparation method of the present invention comprises the following steps:

[0033] (1) Peel off the white floc layer of the inner layer of pomelo peel and put it in a vacuum tube furnace with Ar gas, and calcine it at 500°C to 800°C for 60min to 90min to carbonize grapefruit peel to obtain grapefruit peel biological carbon material.

[0034] (2) biochar, analysis of pure bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O) and sodium tungstate (Na 2 WO 4 2H 2 O), dissolved in a beaker of deionized water with magnetic stirring to make it fully dissolve, then add the surfactant cetyltrimethylammonium bromide (CTAB), and continue to dissolve with ultrasonic stirring; the precursor raw material Bi(NO 3 ) 3 ·5H 2 O, Na 2 WO 4 2H 2 The ratio between O, biochar and CTAB is (3~5)mmol: (1~3)mmol: (0.1~0.3)g: (1.2~1.8)mmol; Bi(NO 3 ) 3 ·5H 2 The ratio of O and water is (3-5) mmol: 40ml.

[0035] (3) Finally, adjust the pH range of the reaction precursor solution to 1-3 with ...

Embodiment 1

[0042] Hydrangea cluster Bi of the present invention 2 WO 6 / Biological charcoal composite photocatalytic material is based on pomelo peel as the raw material of biochar, with cationic surfactant cetyltrimethylammonium bromide (CTAB) as carrier or template agent, and bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O) and sodium tungstate (Na 2 WO 4 2H 2 O) interactions between self-assembled to form a hydrangea cluster Bi with rich porous structure characteristics 2 WO 6 / biochar composite photocatalytic material.

[0043] Wherein, the ratio between bismuth nitrate, sodium tungstate, biochar and CTAB is 4mmol:2mmol:0.2g:1.6mmol.

[0044] A kind of hydrangea cluster Bi 2 WO 6 The preparation method of biochar composite photocatalytic material comprises the following steps:

[0045] (1) Peel off the white flocculent layer of the inner layer of pomelo peel, that is, the inner white fiber, and put it in a vacuum tube furnace with Ar gas for calcination at 800 °C for 60 min. After c...

Embodiment 2

[0071] (1) Peel off the white floc layer of the inner layer of pomelo peel, that is, the inner white fiber, put it in a vacuum tube furnace with Ar gas and calcinate at 500 °C for 90 minutes, and obtain grapefruit peel biochar material after cooling.

[0072] (2) Weigh 0.1g of biochar, 3mmol of bismuth nitrate and 1mmol of sodium tungstate respectively, and dissolve them in a beaker of 40ml of deionized water with magnetic stirring to fully dissolve to obtain a brown-black solution, and then add 1.2mmol of surfactant to it Cetyltrimethylammonium bromide, continue ultrasonic stirring to fully dissolve.

[0073] (3) Finally, adjust the pH value of the precursor solution to 1 with 0.2mol / L NaOH solution.

[0074] (4) Put the above-mentioned reaction precursor solution into a polytetrafluoroethylene liner, seal the reaction hydrothermal kettle, and put it into a magnetic stirring microwave reactor MDS-10 for microwave hydrothermal reaction under the condition of 180°C for 90 minut...

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Abstract

The invention relates to a hydrangea flower-cluster-shaped bismuth tungstate / biocarbon composite photocatalytic material, a preparation method and an application thereof. The preparation method comprises the following steps: firstly adding biocarbon, Bi(NO3)3.5H2O and Na2WO4.2H2O into water, mixing uniformly, then adding a surface active agent to mix uniformly, and thus obtaining reaction precursor solution, wherein the proportion among Bi(NO3)3.5H2O, Na2WO4.2H2O, biocarbon and the surface active agent is (3-5)mmol:(1-3)mmol:(0.1-0.3)g:(1.2-1.8)mmol; adjusting the pH value of the reaction precursor solution to 1-3; carrying out hydrothermal reaction on the reaction precursor solution with adjusted pH value; and after the hydrothermal reaction is finished, taking out products, washing, drying and grinding to obtain the hydrangea flower-cluster-shaped bismuth tungstate / biocarbon composite photocatalytic material. The hydrangea flower-cluster-shaped bismuth tungstate / biocarbon composite photocatalytic material, the preparation method and the application have the advantages that by introduction of the biocarbon, not only can the cost be reduced and the process be simplified, but also the photocatalytic activity of the material can be improved and the degrading effect for organic pollutants is good.

Description

technical field [0001] The invention belongs to the field of inorganic functional materials, and in particular relates to a hydrangea cluster bismuth tungstate / biochar composite photocatalytic material and its preparation method and application. Background technique [0002] With the development of globalization, climate warming and environmental pollution are major problems faced by countries all over the world. It has become an important topic for researchers to develop an environmentally friendly, non-polluting, low-cost, and recyclable environmental purification treatment technology. research direction. [0003] Among many semiconductor materials, bismuth tungstate material has a narrow bandgap (~2.7eV), can be excited by ultraviolet light and visible light, has photostability, and does not have photocorrosion phenomenon, which is helpful for its research. Improve the utilization of visible light. In order to further improve its photocatalytic performance, researchers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/31B01J20/20B01J20/30C02F1/30C02F1/28C02F101/30C02F101/34
CPCB01J20/0259B01J20/20C02F1/281C02F1/283C02F1/30B01J23/31C02F2101/345C02F2101/308C02F2305/10B01J35/39
Inventor 刘丁菡刘运左浩强李晋阳马随艳赵敏竹王凯
Owner SHAANXI UNIV OF SCI & TECH
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