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Preparation method for iron, cobalt and nitrogen co-doped modified TiO2/SO42-visible light photocatalyst

A photocatalyst and co-doping technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of inability to increase the absorption intensity, achieve stable crystal form, mild reaction conditions, and low cost cheap effect

Inactive Publication Date: 2013-06-12
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN102407146 patent proposes TiO co-doped with nitrogen and cobalt 2 It can degrade organic pollutants under visible light, and the degradation effect is remarkable, but none of these patented technologies can effectively make it produce absorption edge red shift, increase absorption intensity, and control the combination of electrons and holes at the same time

Method used

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  • Preparation method for iron, cobalt and nitrogen co-doped modified TiO2/SO42-visible light photocatalyst
  • Preparation method for iron, cobalt and nitrogen co-doped modified TiO2/SO42-visible light photocatalyst
  • Preparation method for iron, cobalt and nitrogen co-doped modified TiO2/SO42-visible light photocatalyst

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example 1

[0026] Quickly stir 30.0 mL of n-propanol at room temperature, drop 10.0 mL of technical grade isopropyl titanate into n-propanol from a separatory funnel, stir and mix into a light yellow transparent solution, dropwise add 0.75 mL of concentrated sulfuric acid and 2.0 mL of acetylacetone hydrolysis inhibitor, then the reaction vessel was sealed to prevent the hydrolysis of isopropyl titanate, and the system was light yellow under sealing and stirring at room temperature for 6.0 h; then, according to Fe, Co, N and TiO 2 The weight ratio of Fe:TiO 2 =3.0wt%, Co:TiO 2 =1.0wt%, N:TiO 2 =1.5wt% Weigh out 0.4239g of ferric sulfate, 0.0601g of cobalt chloride, and 0.0876g of urea, and dissolve these three substances together in 15.0mL of high-purity water to form a yellow-brown transparent solution. The dissolved solution of the above three substances is added dropwise to the light yellow transparent solution, and the dropping speed is controlled to ensure that the isopropyl titan...

example 2

[0034] Quickly stir 30.0 mL of n-propanol at room temperature, drop 10.0 mL of technical grade isopropyl titanate into n-propanol from a separatory funnel, stir and mix into a light yellow transparent solution, dropwise add 0.75 mL of concentrated sulfuric acid and 2.0 mL of acetylacetone hydrolysis inhibitor, then the reaction vessel was sealed to prevent the hydrolysis of isopropyl titanate, and the system was light yellow under sealing and stirring at room temperature for 6.0 h; then, according to Fe, Co, N and TiO 2 The weight ratio of Fe:TiO 2 =2.0wt% Weigh out 0.2826g of ferric sulfate, Co:TiO 2 =2.0wt% Weigh 0.1202g of cobalt chloride, N:TiO 2 =1.5wt% 0.0876g of urea was weighed, and the three substances were dissolved together in 15.0mL of high-purity water to form a yellow-brown transparent solution. The dissolved solution was added dropwise to the light yellow transparent solution system, and the dropping rate was strictly controlled to ensure that the isopropyl ti...

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Abstract

The invention discloses a preparation method for an iron, cobalt and nitrogen co-doped modified TiO2 / SO42-visible light photocatalyst. The preparation method comprises the following steps of: (1) preparing a mixed liquor A; (2) preparing an ion mixed liquor B; (3) slowly dropping the mixed liquor B into the mixed liquor A under the condition of maintaining the room temperature, and continuously stirring in the dropping process to form bronzing sol; (4) putting aged sol into an oven for drying for 6-7 hours at 60-80 DEG C to obtain red particles; and (5) putting dried red particles into a mortar to be grinded to form fine powder, then putting the fine powder into a muffle for heating up to be at 400-550 DEG C at a speed of 1 DEG C per minute-15 DEG C per minute, and calcining for 3 hours so as to obtain the anatase type Fe-Co-N-TiO2 / SO42-visible light photocatalyst. The modififed TiO2 / SO42-visible light photocatalyst takes industrial grade metatitanic acid isopropyl ester as a titanium source, so that the cost is low; and the sol-gel process is conducted at the room temperature, and the reaction condition is mild. The visible light response range of the photocatalyst is greater than 600nm, thus meeting the industrial application requirements.

Description

technical field [0001] The invention belongs to the field of preparation of nano-titanium dioxide visible light catalysts, in particular to an iron, cobalt and nitrogen co-doping modified TiO 2 / SO 4 2- Preparation and application of visible light photocatalysts. Background technique [0002] Titanium dioxide (TiO 2 ) is widely used in the field of photocatalysis due to its low cost, non-toxicity, stable chemical properties, and high photocatalytic activity. 2 Photocatalysis is gradually playing an important role in the environment and energy. However, nano-titanium dioxide (3.2ev) has a relatively large band gap and can only absorb ultraviolet light <380nm, while ultraviolet light only accounts for about 4.0% of natural light, and the solar energy utilization rate is extremely low; in addition, the surface electrons and holes are extremely strong. The recombination effect has a serious influence on the photocatalytic performance of nano-titania. Therefore, the modi...

Claims

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Application Information

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IPC IPC(8): B01J27/053C02F1/30
Inventor 王剑峰王剑平董贺新卫冬燕张亚非韩丽张守恒赵金海张忠坤郭国伟王达菲
Owner ZHENGZHOU UNIV
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