Bismuth titanate catalyst with sunlight photocatalytic activity

A photocatalytic activity and photocatalyst technology, applied in the field of photocatalysis, can solve problems such as reducing the band gap energy, and achieve the effects of cheap raw materials, easy availability of raw materials, and simple production process

Inactive Publication Date: 2014-08-20
NANJING UNIV OF TECH
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Problems solved by technology

[0004] The above research results show that despite the shape control and the development of composite materials, the Bi 4 Ti 3 o 12 After the material is modified, its band gap energy can be further reduced, so that it can achieve visible light activity, but so far, there are few literature reports involving the direct use of sunlight to study the photocatalytic activity of such materials

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  • Bismuth titanate catalyst with sunlight photocatalytic activity
  • Bismuth titanate catalyst with sunlight photocatalytic activity

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Embodiment 1

[0011] (1) Bismuth titanate (Bi 4 Ti 3 o 12 )Synthesis

[0012] 0.97g of Bi(NO 3 ) 3 ·5H 2 O is uniformly dispersed in 0.5mol / L nitric acid solution, and 0.0015mol of P25 is added thereto, stirred until uniformly dispersed, adjusted to pH 9-12 with 0.2mol / L caustic soda solution, left standing, suction filtered, and Calcined at 600 °C for 1 h in a muffle furnace to obtain a light yellow solid Bi 4 Ti 3 o 12 ; Product XRD see attached figure 1 , compared with the orthosymmetric Aurivillius 4 Ti 3 o 12 (card JCPDS35-0795) match. Measure its acid content as 0.08mmol / L, measure its specific surface area as 8.8694m 2 / g.

[0013] (2) Preparation of acid bismuth titanate photocatalyst

[0014] Weigh 1g Bi 4 Ti 3 o 12 , add it to 20ml of concentrated nitric acid, stir at a constant temperature of 60°C for 40min, let it stand and pour off the supernatant, wash the precipitate with deionized water until neutral, filter it with suction, and dry it at a constant temper...

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Abstract

The invention provides a preparation method of a acidic bismuth titanate photocatalyst with photocatalytic activity under sunlight. The invention adopts a chemical solution decomposition method (CSD), and uses bismuth nitrate and P25 as the main raw materials to prepare bismuth titanate (Bi4Ti3Oi2), which is then subjected to acid treatment to obtain the bismuth titanate photocatalyst with sunlight photocatalytic activity. The photocatalyst has excellent methyl orange (MO) degradation performance in the sunlight irradiation. The production process involved in the invention is simple and has cheap and easily available raw materials; the obtained powder has efficient light response degree, and widens the application range of bismuth titanate in photocatalysis field.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis and relates to the preparation of a photocatalyst with high activity for degrading organic pollutants under sunlight. More specifically, it is an acidified modified bismuth titanate (Bi 4 Ti 3 o 12 ) Preparation of photocatalyst. Background technique [0002] With the development of today's society, a large amount of domestic and industrial organic wastewater is produced, especially in the printing and dyeing industry, a large amount of water-soluble azo dyes are discharged (the most representative of which is methyl orange), which makes the ecological environment worsening. How to deal with it? These polluted wastewater has become one of the current hot spots. In recent years, the application and development of semiconductor photocatalysis technology has made it possible to photodegrade organic pollutants in water. Especially the development and manufacture of catalytic materials with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18B01J35/10C02F1/30C02F101/34C02F101/38
CPCY02W10/37
Inventor 陈静梅伟钢侯文华张荣华庆芳杨惠黄前进胡晨晖江春涛李猛
Owner NANJING UNIV OF TECH
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