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High activaty 24 photocatalyst Caln2O4 and its preparation process

A photocatalyst, cain2o4 technology, applied in the field of photocatalytic materials and preparation, can solve the problems of uneven distribution of components, affecting performance, time-consuming and energy consumption, etc., and achieve the effect of low sample synthesis temperature, low product impurity content and low cost

Inactive Publication Date: 2006-01-25
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is not only time-consuming and energy-consuming, but also the distribution of each component is not uniform
In addition, the samples that have been fired for a long time may be partially sintered to form agglomerates, which need to be reground to obtain powder, which will inevitably be mixed with the container and abrasive impurities, thereby affecting its performance
No other method has been found to prepare CaIn 2 o 4 report

Method used

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  • High activaty 24 photocatalyst Caln2O4 and its preparation process
  • High activaty 24 photocatalyst Caln2O4 and its preparation process
  • High activaty 24 photocatalyst Caln2O4 and its preparation process

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) Weigh 2.362 grams of Ca(NO 3 ) 2 4H 2 O, 7.638 grams 3.336 g organic fuel C 2 h 5 NO 2 , after putting into the container, add 50ml of deionized water, stir for 30 minutes to make it fully mixed;

[0023] (2) Take about 20 ml of the solution and place it in a 100 ml container, and cover the mouth of the container with two layers of wire mesh to prevent the material from splashing out during combustion. Keep the container at 200°C for 30 minutes;

[0024] (3) Then slowly heat up to 300°C at a rate of 3°C / min to fully burn the solution in the container to obtain fluffy CaIn 2 o 4 Powder. figure 1 It is an electron micrograph of the powder. It can be clearly seen from the figure that the powder is a nano-rod structure, and its length dimension is about 2 to 5 times that of the radial dimension.

[0025] (4) The above-mentioned combustion powder is baked at 1100° C. for 12 hours. figure 2 It is an electron microscope photo of the powder. It can be clearly s...

Embodiment 2

[0029] (1) Weigh 3.308 grams of Ca(NO 3 ) 2 4H 2 O, 10.693 grams 4.670 g C 2 h 5 NO 2 , add 70 ml of deionized water to make a solution, stir for 20 minutes to make it evenly mixed;

[0030] (2) Take 30 ml of the solution and place it in a 100 ml container, cover the mouth of the container with two layers of wire mesh, and keep the container at 250°C for 20 minutes at a constant temperature;

[0031] (3) Then slowly heat up to 300°C at 2°C / min to fully burn the solution in the container to obtain fluffy CaIn 2 o 4 Powder, the powder was fired at 1200°C for 8 hours to obtain a long and thin rod-shaped structure of CaIn 2 o 4 .

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Abstract

A high-activity photo-catalyst CaIn2O4 is prepared through mixing calcium nitrate, indium nitrate, amino-acetic acid as organic fuel and water to obtain solution, stirring, heating at 200-250 dig. C for 20-30 min, slow heating to 300 deg.C, burning while synthesizing to obtain rod-shaped CaIn2O4 nano-particles, calcination at 1100-1200 deg. C for 8-12 hr and natural cooling to obtain slender rod shaped powder. It has high photo-catalytic degradation performance.

Description

technical field [0001] The invention relates to a photocatalyst material for controlling environmental pollution and its preparation, and also relates to a low-temperature combustion synthesis technology. Background technique [0002] Photocatalysis refers to the process of decomposing organic matter or decomposing water by using the energy of light absorbed by photocatalysts. The mechanism is that photocatalysts with semiconducting properties absorb the energy of photons to generate non-equilibrium electron-hole pairs. These non-equilibrium electrons and holes have strong reduction and oxidation capabilities, and they diffuse to the surface of the photocatalyst. It can oxidize and reduce pollutants into non-polluting small molecules, or decompose water into H 2 and O 2 . Because photocatalysis can use natural light (such as sunlight) to work for a long time, it has a very broad application prospect in the fields of environmental pollution control and hydrogen energy. ...

Claims

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Application Information

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IPC IPC(8): B01J23/08B01J37/00
Inventor 高琛鲍骏丁建军罗震林
Owner UNIV OF SCI & TECH OF CHINA
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