Preparation method of sheet-shaped bismuth titanate and bismuth oxychloride composite material

A technology of bismuth titanate, bismuth oxychloride, and composite materials, which is applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of no sheet catalyst, complicated operation steps, and high cost. Achieve the effects of reducing the hole-electron recombination rate, simple process and flow, and regular morphology

Inactive Publication Date: 2017-09-01
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the complex operation steps, time-consuming and high cost existing in the prior art, and there is no technical defect of the sheet catalyst, and to provide a preparation of sheet-like bismuth titanate bismuth oxychloride composite photocatalyst with good photocatalytic activity. Catalyst and its method

Method used

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  • Preparation method of sheet-shaped bismuth titanate and bismuth oxychloride composite material
  • Preparation method of sheet-shaped bismuth titanate and bismuth oxychloride composite material
  • Preparation method of sheet-shaped bismuth titanate and bismuth oxychloride composite material

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Embodiment 1

[0024] Take 0.34g of bismuth oxide, 0.087g of titanium dioxide, 1.359g of potassium chloride and 1.067g of sodium chloride in a mortar, and their molar ratios are 2:3:50:50, and grind evenly. The ground powder was transferred to a quartz boat and calcined at 800° C. for 2 h to obtain flaky bismuth titanate. Then take the bismuth titanate powder prepared above in a beaker, add 1 mol / L dilute hydrochloric acid, and stir for 4 hours. Filtering, washing and drying to obtain bismuth titanate bismuth oxychloride composite photocatalyst.

[0025] figure 1 The XRD diffraction pattern of the prepared material, the peaks at each position in the figure belong to bismuth titanate or bismuth oxychloride, and compared with the standard JCPDS card (21-1272, 82-0485), it can be determined that the prepared one is good crystallinity Bismuth titanate bismuth oxychloride composite powder material; Figure 2 is a scanning and mapping photo. From the scanning picture, it can be seen that some sma...

Embodiment 2

[0027] Take 0.34g of bismuth oxide, 0.087g of titanium dioxide, 0.815g of potassium chloride and 0.640g of sodium chloride in a mortar, and their molar ratios are 2:3:30:30, and grind evenly. The ground powder was transferred to a quartz boat and calcined at 600° C. for 0.5 h to obtain bismuth titanate. Then take the bismuth titanate powder prepared above in a beaker, add 4 mol / L dilute hydrochloric acid, stir for 1 hour, filter, wash and dry.

Embodiment 3

[0029] Take 0.34g of bismuth oxide, 0.087g of titanium dioxide, 1.087g of potassium chloride and 0.853g of sodium chloride in a mortar, their molar ratios are 2:3:40:40, and grind evenly. The ground powder was transferred to a quartz boat and calcined at 700°C for 1 hour to obtain bismuth titanate. Then take the bismuth titanate powder prepared above in a beaker, add 2 mol / L dilute hydrochloric acid, stir for 2 hours, filter, wash and dry.

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Abstract

The invention provides a preparation method of a sheet-shaped bismuth titanate and bismuth oxychloride composite material and belongs to the technical field of preparation of chemical materials. The preparation method comprises the following steps: preparing sheet-shaped Bi4Ti3O12 through a calcination method and growing a bismuth oxychloride nano sheet on the surface through an ion exchange method; a dye photo-catalytic degradation experiment proves that a prepared sheet-shaped bismuth titanate and bismuth oxychloride composite catalyst has good photo-catalytic activity and is superior to a single bismuth titanate catalyst and a single bismuth oxychloride catalyst in properties; the preparation method provided by the invention is simple in preparation process, low in preparation cost, high in efficiency, strong in practicability, easy for large-scale production and good in economic benefits and environmental protection benefits.

Description

technical field [0001] The invention provides a preparation method of a sheet-like bismuth titanate bismuth oxychloride composite material, which belongs to the technical field of chemical material preparation. Background technique [0002] In the past few years, heterogeneous photocatalytic semiconductor materials have become an exciting and fast-growing research field. If the energy band structure of the two semiconductors satisfies a certain relationship, the photogenerated electrons and holes will be driven by factors such as built-in electric field or potential difference, and will be transferred to different materials, reducing the possibility of recombination and improving photocatalytic efficiency. Composite photocatalysts can improve the shortcomings of single semiconductor photocatalysts such as low quantum efficiency and low utilization rate of visible light in the photocatalytic process, and have potential application value in the field of photocatalysis. At the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18C02F1/30C02F101/30
CPCB01J23/18B01J35/004C02F1/30C02F2101/308
Inventor 钱坤谢吉民夏莉魏巍陈琳琳姜志峰
Owner JIANGSU UNIV
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