Preparation method of neodymium-doped tin dioxide photocatalytic material

A technology of photocatalytic materials and tin dioxide, applied in the field of photocatalytic materials, can solve the problems of low catalytic efficiency and achieve the effects of improving catalytic efficiency, promoting photocatalytic reaction, and good photocatalytic activity

Pending Publication Date: 2020-11-13
XI'AN POLYTECHNIC UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of neodymium-doped tin dioxide photocatalytic material, which solves the problem of low catalytic efficiency existing in the prior art

Method used

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  • Preparation method of neodymium-doped tin dioxide photocatalytic material
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  • Preparation method of neodymium-doped tin dioxide photocatalytic material

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preparation example Construction

[0021] The preparation method of neodymium-doped tin dioxide photocatalytic material of the present invention specifically includes the following steps:

[0022] Step 1. Mix the stannous chloride, citric acid and CTAB and add them to deionized water. After stirring, a mixed solution is obtained. Add hydrated neodymium nitrate to the mixed solution, and stir for 0.5h-1h to obtain a mixed solution; stannous chloride, The molar ratio of citric acid, CTAB and hydrated neodymium nitrate is 2:3:4:0.015-2:3:4:0.035.

[0023] SnO 2 It can be obtained by hydrolysis of tin salt solution, the specific reaction is as follows:

[0024] S n 2+ +2H 2 O→S n (OH) 2 +2H +

[0025]

[0026]

[0027] S n (OH) 4 +2OH-→S n (OH) 6 2-

[0028] S n (OH) 6 2- →S n O 2 +2OH - +2H 2 O

[0029] Among them, citric acid and CTAB can play a role in morphology control. Cationic surfactant CTAB in SnO 2 The formation of the structure plays a vital role. On the one hand, the presence of CTAB can reduce the surface tens...

Embodiment 1

[0034] Step 1. Mix 0.113g of stannous chloride, 0.631g of citric acid, and 0.4g of CTAB, then add deionized water, stir to obtain a mixed solution, add 0.0049g of hydrated neodymium nitrate to the mixed solution, and stir for 0.5h to obtain a mixed solution ;

[0035] Step 2. Place the mixed solution in a polytetrafluoroethylene reactor for hydrothermal reaction. The reaction temperature is 200°C and the reaction time is 24 hours. After cooling to room temperature, take out the bottom product of the reaction vessel and centrifuge it. Get a sample

[0036] Step 3. Wash the sample with deionized water and ethanol in sequence to obtain the neodymium-doped tin dioxide photocatalytic material. See the SEM picture figure 1 , See the high magnification SEM image figure 2 , See the EDS diagram image 3 . by figure 1 figure 2 It can be seen that the prepared product is composed of a large amount of hollow spherical materials, and the SnO prepared in Example 1 2 The diameter of the spher...

Embodiment 2

[0038] Step 1. Mix 0.115g of stannous chloride, 0.638g of citric acid, and 0.5g of CTAB, then add deionized water, stir to obtain a mixed solution, add 0.0082g of hydrated neodymium nitrate to the mixed solution, and stir for 0.8h to obtain a mixed solution ;

[0039] Step 2. Place the mixed solution in a polytetrafluoroethylene reactor for a hydrothermal reaction. The reaction temperature is 180°C, and the reaction time is 20 hours. After cooling to room temperature, take out the bottom product of the reaction vessel and centrifuge it. Get a sample

[0040] Step 3. Wash the sample in the centrifuge tube with deionized water first, and repeat three times; then, wash the sample in the centrifuge tube with ethanol, and repeat three times to obtain the neodymium-doped tin dioxide photocatalytic material.

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Abstract

The invention discloses a preparation method of a neodymium-doped tin dioxide photocatalytic material. The preparation method comprises the following steps: mixing stannous chloride, citric acid and CTAB, adding the formed mixture into deionized water, carrying out stirring to obtain a mixed solution, adding neodymium nitrate hydrate into the mixed solution, and conducting stirring to obtain mixedliquid; putting the mixed liquid into a polytetrafluoroethylene reaction kettle, carrying out a hydrothermal reaction, performing cooling, and carrying out centrifugal separation on a kettle-bottom product to obtain a sample; and washing the sample with deionized water and ethanol in sequence to obtain the neodymium-doped tin dioxide photocatalytic material. With the neodymium-doped tin dioxide photocatalytic material, recombination of electrons and holes inside or on the surface of stannic oxide can be reduced, reductive oxidation reaction of the electrons and the holes with respective receptors is accelerated, and a photocatalytic reaction is promoted.

Description

Technical field [0001] The invention belongs to the technical field of photocatalytic materials and relates to a preparation method of neodymium-doped tin dioxide photocatalytic materials. Background technique [0002] Due to the rapid development of modern society, the rapid rise of China's light and heavy industries has brought huge economic benefits to the country but also brought huge harm. Due to people's inadequate anticipation of the negative effects of highly developed industries and unfavorable prevention, there are three major global crises: resource shortage, environmental pollution, and ecological destruction. The main factor causing environmental pollution is the discharge of the three wastes. According to data, there are currently more than 100,000 commercial dyes, and the global annual output of dyes is 800,000-900,000 tons. Approximately 280,000 tons of synthetic dyes are discharged into the environment through industrial wastewater each year. Their complex arom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14B01J37/10C02F1/30C02F101/30
CPCB01J23/14B01J35/004B01J37/10C02F1/30C02F2305/10C02F2101/308
Inventor 刘斌陈宁张鹏杜燕萍常薇
Owner XI'AN POLYTECHNIC UNIVERSITY
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