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Preparation method of SnO2 nanometer particle photocatalyst with controllable size

A nanoparticle and photocatalyst technology, applied in the direction of tin oxide, etc., can solve the problems of wide product particle size distribution, discontinuous preparation process, poor particle size controllability, etc., and achieve narrow particle size distribution and strong controllability of reaction conditions , the effect of short synthesis time

Inactive Publication Date: 2012-09-19
SHANGHAI NORMAL UNIVERSITY
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  • Description
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  • Application Information

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Problems solved by technology

However, judging from the current preparation methods, there are basically disadvantages such as discontinuous preparation process, wide product particle size distribution, large energy consumption and poor particle size controllability.

Method used

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  • Preparation method of SnO2 nanometer particle photocatalyst with controllable size
  • Preparation method of SnO2 nanometer particle photocatalyst with controllable size
  • Preparation method of SnO2 nanometer particle photocatalyst with controllable size

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 3.5mmol of SnCl 2 2H 2 O, ultrasonically dissolved in 10 mL of tert-butanol, added 5.00 mL of glycerin and 2.25 mL of cyclohexane, stirred until the solution was clear and transparent, put it in a kettle, and put it in an oven at 200 ° C for 18 hours. Naturally cool to room temperature, wash repeatedly with deionized water and ethanol, centrifuge, vacuum-dry at 80°C, and roast at 500°C for 4 hours to obtain the sample.

[0026] figure 1 It is the field emission electron microscope picture of the sample in Example 1, it can be seen from the figure that the sample particle size is small, and the dispersion and uniformity are also good. figure 2 with image 3 As shown, the particle size distribution corresponding to the transmission electron microscope figure clearly indicates that the average particle size is 19.6nm respectively. Figure 4 The X-ray diffraction pattern of the synthesized SnO can be seen 2 The sample presents a tetragonal rutile structure (JCPD...

Embodiment 2

[0029] The operation steps of Example 1 were repeated, except that 1.00 mL of glycerin was added, the result was similar to that of Example 1, but the nanoparticles became smaller.

Embodiment 3

[0031] The operation steps of Example 1 were repeated, except that 5.00 mL of ethylene glycol was added, and the result was similar to that of Example 1, but the nanoparticles became larger.

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Abstract

The invention discloses a preparation method of a SnO2 nanometer particle photocatalyst with a controllable size. The preparation method comprises the following steps: (1). weighing a certain amount of SnC12, 2H2O; dissolving the SnC12 and the 2H2O into tertiary butanol in an ultrasonic manner; adding glycerol (or glycol) and cyclohexane; and stirring until the solution is clear and transparent; (2). loading a precursor liquid into a 50mL hydrothermal reactor, and putting the hydrothermal reactor into an oven to perform alcohol heat reaction for a certain time; (3). taking out the reactor; after cooling naturally, wash repeatedly the reactor by using de-ionized water and ethanol, centrifugating and vacuum drying at 80 DEG C; and (4). performing heat treatment in a muffle furnace for a certain time to obtain a sample product. With the adoption of the method, one-step alcohol heat method is adopted to prepare the SnO2 nanometer particle photocatalyst. The method has the advantages of being simple in preparation process, strong in controllability of the reaction condition and short in synthesis time; and the obtained catalyst has narrow particle size distribution, good dispersion performance and controllable size. The method has potential application value in environment treatment, especially dyes wastewater treatment.

Description

technical field [0001] The invention relates to a method for preparing a semiconductor nanoparticle photocatalyst, specifically size-controllable SnO 2 Preparation method of nanoparticle photocatalyst. Background technique [0002] Metal oxide semiconductor nanoparticles have aroused great interest among researchers due to their importance and potential applications in nanodevices, among which SnO 2 Nanoparticles are a very important wide bandgap n-type semiconductor material (the forbidden band width is 3.62eV). SnO 2 It has good catalytic activity under ultraviolet light. As an effective method for removing organic matter, its photocatalytic oxidation is widely used in the field of cleaning and purification of organic pollutants in water and air. It is considered to be the most promising green catalyst. one. [0003] Currently preparing SnO 2 There are many methods, such as microemulsion method, sol-gel method, solvothermal method, hydrolysis method, precipitation met...

Claims

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Application Information

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IPC IPC(8): B01J23/14C01G19/02
Inventor 李贵生吴玲张岩琛徐鹏鹏李和兴
Owner SHANGHAI NORMAL UNIVERSITY
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