Method for preparing ring-shaped bismuth oxyiodide (BiOI) microspheres

A ring-shaped, microsphere technology, applied in chemical instruments and methods, inorganic chemistry, bismuth compounds, etc., can solve problems such as limiting practical applications, and achieve the effects of low cost, high performance, and simple equipment

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, TiO 2 The photoresponse only occurs in the ultraviolet region, which greatly limits its practical application

Method used

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  • Method for preparing ring-shaped bismuth oxyiodide (BiOI) microspheres
  • Method for preparing ring-shaped bismuth oxyiodide (BiOI) microspheres
  • Method for preparing ring-shaped bismuth oxyiodide (BiOI) microspheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 0.1g Bi(NO 3 ) 3 Dissolve in 50mL alcohol to obtain solution A; mix 0.2g KI with 5mL oleic acid to obtain solution B; then mix solution A and solution B and stir to obtain a uniformly distributed solution. Pour the above solution into an autoclave and heat it with water at a temperature of 100°C for 36h. After the reaction, the product was washed with distilled water, filtered, and dried to obtain reddish-brown circular BiOI microspheres.

Embodiment 2

[0019] 0.5g Bi(NO 3 ) 3 Dissolve in 75mL alcohol to obtain solution A; mix 0.5g KI with 10mL oleic acid to obtain solution B; then mix solution A and solution B and stir to obtain a uniformly distributed solution. Pour the above solution into an autoclave, and heat it with water at a temperature of 130° C. for 24 hours. After the reaction, the product was washed with distilled water, filtered, and dried to obtain reddish-brown circular BiOI microspheres.

Embodiment 3

[0021] 1.0g Bi(NO 3 ) 3 Dissolve in 100mL alcohol to obtain solution A; mix 0.5g KI with 20mL oleic acid to obtain solution B; then mix solution A and solution B and stir to obtain a uniformly distributed solution. Pour the above solution into an autoclave and heat it with water at a temperature of 160°C for 20h. After the reaction, the product was washed with distilled water, filtered, and dried to obtain reddish-brown circular BiOI microspheres.

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Abstract

The invention discloses a method for preparing ring-shaped bismuth oxyiodide (BiOI) microspheres and relates to a photocatalyst. The method comprises the following steps of: dissolving Bi(NO3)3 into alcohol to obtain a solution A, and mixing KI with oleic acid to obtain a solution B; and mixing the solution A with the solution B to obtain a mixed solution, stirring, then pouring the mixed solution into an autoclave, performing a hydrothermal reaction on the mixed solution, cleaning, filtering and drying to obtain rufous ring-shaped BiOI microspheres. According to the method, the Bi(NO3)3 and the KI are used as raw materials for preparing the ring-shaped BiOI microspheres in the mixed solution of alcohol and oleic acid by using a low-temperature hydrothermal one-step method. Compared with BiOI microspheres of other shapes, the ring-shaped BiOI microspheres are defined by a group of nano-sheets which are parallel and arranged into a circle, and the ring-shaped BiOI microspheres have a porous structure, so that the adsorption performance is improved, and then the photo-catalytic activity is obviously improved. The low-temperature hydrothermal one-step method is easy to control through hydrothermal media, hydrothermal temperature and hydrothermal time and is a simple and feasible method with application potentiality for preparing high-catalytic-activity BiOI. The method for preparing the ring-shaped BiOI microspheres has the advantages that cost is low, operation temperature is low and equipment is simple.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a method for preparing a ring-shaped BiOI microsphere. Background technique [0002] TiO 2 Photocatalytic technology is a new field that has emerged in the past ten years. Due to its low cost, high activity, photostability and non-toxicity, it is widely used in the fields of pollution control and energy development, and has attracted great attention. However, TiO 2 The photoresponse occurs only in the ultraviolet region, which greatly limits its practical application. Therefore, seeking high-performance visible light photocatalytic materials will be an inevitable trend for the further development of photocatalytic technology. One of the important development directions is to develop a new type of photocatalyst. [0003] BiOI is a new type of semiconductor material with a forbidden band width of 1.79eV, which can be excited by most of the visible light. At the same time, it has a unique crys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B01J27/06B01J35/08
Inventor 周忠华吴玉萍黄悦
Owner XIAMEN UNIV
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