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Preparation method of burred BiOI/ZnO microspheres

A burr-like, microsphere technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of low photon quantum efficiency, narrow spectral response range, reduced catalyst activity, etc. Low cost, simple equipment and low cost

Active Publication Date: 2013-05-22
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the following problems still exist in practical applications: low photon quantum efficiency and narrow spectral response range
However, in heterostructures, where one material is supported on another, it is important to control the loading and uniform distribution, since complete coverage or very little coverage will reduce the activity of the catalyst.

Method used

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  • Preparation method of burred BiOI/ZnO microspheres
  • Preparation method of burred BiOI/ZnO microspheres
  • Preparation method of burred BiOI/ZnO microspheres

Examples

Experimental program
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Effect test

Embodiment 1

[0018] 0.1g Bi (NO 3 ) 3 and 0.2g Zn(Ac) 2 Dissolve in 25mL of alcohol, wait for Bi(NO 3 ) 3 Completely dissolved, 0.2 g KI was added and stirred to obtain a pale yellow solution. The above solution was poured into an autoclave and hydrothermally heated at 100 °C for 36 h. After the reaction, the product was washed with distilled water, filtered and dried to obtain orange-yellow burr-shaped BiOI / ZnO microspheres.

Embodiment 2

[0020] 0.5g Bi (NO 3 ) 3 and 2g Zn(Ac) 2 Dissolve in 100mL of alcohol, wait for Bi(NO 3 ) 3 Completely dissolved, 0.5 g of KI was added and stirred to obtain a pale yellow solution. The above solution was poured into an autoclave and hydrothermally heated at 130°C for 24h. After the reaction, the product was washed with distilled water, filtered and dried to obtain orange-yellow burr-shaped BiOI / ZnO microspheres.

Embodiment 3

[0022] 0.5g Bi (NO 3 ) 3 and 3g Zn(Ac) 2 Dissolve in 150mL of alcohol, wait for Bi(NO 3 ) 3 Completely dissolved, 1.0 g of KI was added and stirred to obtain a pale yellow solution. The above solution was poured into an autoclave and hydrothermally heated at 160°C for 20h. After the reaction, the product was washed with distilled water, filtered and dried to obtain orange-yellow burr-shaped BiOI / ZnO microspheres.

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Abstract

The invention relates to BiOI / ZnO microspheres, particularly a preparation method of burred BiOI / ZnO microspheres, which comprises the following steps: dissolving Bi(NO3)3 and Zn(Ac)2 in alcohol, adding KI, stirring to obtain a light yellow solution, pouring into a high-pressure kettle, carrying out hydrothermal reaction, washing, filtering, and drying to obtain the orange burred BiOI / ZnO microspheres. The bismuth nitrate, KI and Zn(Ac)2 used as raw materials are subjected to a low-temperature hydrothermal one-step method in alcohol to prepare the burred BiOI / ZnO microspheres. Compared with other shapes, the burred BiOI / ZnO microspheres are formed by forming ZnO nanorod array burr on the surface of the BiOI / ZnO composite microspheres, thereby increasing the surface area and enhancing the adsorbability. The photocatalytic activity is obviously enhanced. The low-temperature hydrothermal method can be easily controlled by the hydrothermal medium, hydrothermal temperature and hydrothermal time, and has the advantages of low operating temperature, simple equipment, low cost and no pollution.

Description

technical field [0001] The invention relates to a BiOI / ZnO microsphere, in particular to a preparation method of a burr-shaped BiOI / ZnO microsphere. Background technique [0002] Photocatalytic reaction is a process in which semiconductor materials are degraded by redox reactions by converting light energy into chemical energy under the irradiation of light. The advantages of photocatalysis without adding additives and producing no by-products have become a research hotspot in the field of environment and energy. However, the following problems still exist in practical applications: low photon efficiency and narrow spectral response range. At present, research and development of low-cost and high-efficiency photocatalysts is an important development direction. [0003] At present, bismuth oxyhalide BiOI is a new direction of photocatalysis research, with high visible light activity and application potential. However, the single-phase BiOI can easily recombine the photogen...

Claims

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Application Information

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IPC IPC(8): B01J27/138B01J35/08
Inventor 周忠华吴玉萍黄悦
Owner XIAMEN UNIV