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Preparation method of tantalate photocatalytic material

A photocatalytic material, tantalate technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low activity, poor stability and long synthesis time, and achieve hydrogen production. The effect of high speed, good stability and shortened preparation time

Inactive Publication Date: 2012-08-08
HARBIN INST OF TECH
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Problems solved by technology

[0003] The invention is to solve the technical problems of long synthesis time, low activity and poor stability of the existing hydrothermal preparation method of tantalate photocatalytic materials, and to provide a preparation method of tantalate photocatalytic materials

Method used

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  • Preparation method of tantalate photocatalytic material
  • Preparation method of tantalate photocatalytic material
  • Preparation method of tantalate photocatalytic material

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specific Embodiment approach 1

[0012] Specific embodiment 1: The preparation method of a tantalate photocatalytic material of this embodiment is carried out in the following steps:

[0013] 1. According to the molar ratio of NaCl and KCl of 0.45:0.55, weigh NaCl and KCl and ball mill them to a particle size ≤10μm to obtain eutectic molten salt powder;

[0014] 2. Press Na 2 CO 3 , K 2 CO 3 And Ta 2 O 5 The molar ratio is 1:1:1, weighing Na 2 CO 3 , K 2 CO 3 And Ta 2 O 5 And mix evenly, and then grind to a particle size ≤10μm to obtain raw material powder;

[0015] 3. The raw material powder obtained in step 2 and the eutectic molten salt powder obtained in step 1 are uniformly mixed in a mass ratio of 1: (1 to 3) to obtain a mixed powder;

[0016] 4. Place the mixed powder obtained in step 3 in a corundum crucible, then put the crucible in a high-temperature furnace, and fire at 700-850℃ for 1 to 4 hours. The product obtained is washed with deionized water and centrifuged. After drying, the tantalate photocatalytic...

specific Embodiment approach 2

[0018] Specific embodiment two: this embodiment is different from specific embodiment one in that in step three, the mass ratio of the raw material powder and the eutectic molten salt powder is 1: (1.5-2.8). Others are the same as the first embodiment.

specific Embodiment approach 3

[0019] Specific embodiment three: This embodiment is different from specific embodiment one in that the mass ratio of the raw material powder and the eutectic molten salt powder in step three is 1:2. Others are the same as the first embodiment.

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Abstract

A tantalate photocatalytic material and a preparation method thereof. The invention relates to a preparation method of a photocatalytic material. The present invention aims to solve a technical problem that an existing hydrothermal preparation method of tantalate photocatalytic material has long synthesis time, low activity and weak stability. The method comprises steps of: 1. mixing and grinding NaCl and KCl to obtain a eutectic fused salt powder; 2. mixing and grinding Na2CO3, K2CO3 and Ta2O5 to obtain a raw material powder; 3. evenly mixing the raw material powder and the eutectic fused salt powder to obtain a mixed powder; 4. calcining the mixed powder at a temperature of 700-850 DEG C for 1-4 hours, and washing and drying the products to obtain the tantalate photocatalytic material. The tantalate photocatalytic material of the present invention can reach hydrogen production rate up to 5-8 mmol / h and activity attenuation less than 3% after 20 h reaction and can be used in fields of hydrogen production by photocatalytic water splitting and water treatment.

Description

Technical field [0001] The invention relates to a preparation method of a photocatalytic material. technical background [0002] In the 21st century, environmental pollution and energy shortage have become two major problems that plague the sustainable development of human society. Currently, the energy and chemical raw materials that humans can use are mainly coal, petroleum, natural gas and other traditional non-renewable energy materials. However, with the rapid development of economy and the continuous progress of human society, these fossil energy materials will be gradually exhausted, which makes people have to find and develop new alternative energy sources, as well as low-cost, environmentally friendly environmental pollutant treatment technologies . At present, governments and scientific researchers around the world have carried out a lot of work dedicated to the treatment of environmental pollution and the development of new energy. In these researches, solar photoca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20B01J37/00C01B3/04
CPCY02E60/364Y02E60/36
Inventor 陈刚孙净雪董红军裴健金仁成熊桂洪
Owner HARBIN INST OF TECH
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