SnO2/ZnO nanocomposite and preparation method thereof

A nanocomposite material and nanorod technology, applied in the field of SnO2/ZnO nanocomposite material and its preparation, can solve the problems of limited material properties and applications, cumbersome preparation process, chaotic and disordered ZnO hetero-nano branch structure, etc. Effects of lifetime and carrier concentration, simple process, and high yield

Inactive Publication Date: 2016-08-10
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a large number of scientific researchers have been working on ZnO and SnO 2 Combination of materials and achieved corresponding results, such as Chinese patent CN200810116624 discloses a one-dimensional SnO 2 -Preparation method of ZnO heterogeneous nano-branch structure, using gas transport, two-step thermal evaporation method on Al 2 o 3 SnO 2 is the axis, ZnO is the branched SnO 2 -ZnO heterogeneous nano-branch structure, the preparation process is relatively cumbersome and requires a high temperature environment, and the obtained SnO 2 -ZnO heterogeneous nano-branch structure is disordered and disordered, which limits the properties and applications of materials

Method used

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  • SnO2/ZnO nanocomposite and preparation method thereof
  • SnO2/ZnO nanocomposite and preparation method thereof
  • SnO2/ZnO nanocomposite and preparation method thereof

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Experimental program
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Embodiment 1

[0031] Step 1: Pour 1.4mol / L NaOH solution into 0.1mol / L Zn(CH 3 COOH) 2 2H 2 O solution (volume ratio is 1:1), after fully stirring to obtain the precursor solution, move 30ml of the precursor solution into the TFM-lined reaction kettle (the volume of the lining is 100ml), seal it and place it under a microwave power of 400W After the reaction, the reaction product was centrifuged and washed several times with deionized water until the pH of the filtrate = 7, and then the obtained product was dried in an oven at 60 °C to obtain ZnO The nanorod has a length of 5-10 μm and a diameter of about 0.5-1 μm.

[0032] Step 2, the SnCl of 0.05mol / L 4 ·5H 2 O solution is dripped in the NaOH solution of 0.3mol / L, after the titration is finished, add the ZnO nanorod prepared in step 1 of 0.01mol / L and keep stirring for 30min (the molar ratio of the three is [SnCl 4 ]:[NaOH]:[ZnO]=5:30:1) to obtain the precursor solution, take 30ml of the precursor solution and move it into the reacti...

Embodiment 2

[0035] Step 1: Same as Embodiment 1.

[0036] Step two: the SnCl of 0.1mol / L 4 ·5H 2 The O solution was dripped into the 0.9mol / L NaOH solution dropwise, and after the titration was completed, 0.02mol / L of ZnO was added and continued to stir for 30min (the molar ratio of the three was [SnCl 4 ]:[NaOH]:[ZnO]=5:45:1) to obtain the precursor solution, take 30ml of the precursor solution and move it into the reaction kettle of the TFM lining (the volume of the lining is 100ml), and place it in a microwave power of 400W After the reaction, the reaction product was centrifuged and washed with deionized water for several times until the pH of the filtrate = 7, and then the obtained product was dried in an oven at 60°C. Get SnO 2 / ZnO nanocomposites.

[0037] The X-ray diffraction pattern of the product is as figure 2 As shown in the scanning electron micrograph Figure 5 shown; figure 2 Illustrate that the product of embodiment two is SnO 2 / ZnO complex, Figure 5 Illustra...

Embodiment 3

[0039] Step 1: Same as Embodiment 1.

[0040] Step two: the SnCl of 0.3mol / L 4 ·5H 2 The O solution was dripped into the 1.8mol / L NaOH solution dropwise, and after the titration was completed, 0.05mol / L of ZnO was added and continued to stir for 30min (the molar ratio of the three was [SnCl 4 ]:[NaOH]:[ZnO]=6:36:1) to obtain the precursor solution, take 30ml of the precursor solution and move it into the reaction kettle of the TFM lining (the volume of the lining is 100ml), and place it in a microwave power of 400W After the reaction, the reaction product was centrifuged and washed with deionized water for several times until the pH of the filtrate = 7, and then the obtained product was dried in an oven at 60°C. Get SnO 2 / ZnO nanocomposites.

[0041] The X-ray diffraction pattern of the product is as image 3 As shown in the scanning electron micrograph Image 6 shown; image 3 Illustrate that the product of embodiment three is SnO 2 / ZnO complex, Image 6 Illustrate...

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Abstract

The invention discloses SnO2/ZnO nanocomposite and a preparation method thereof. The SnO2/ZnO nanocomposite comprises a ZnO nanorod and an SnO2 nanorod growing on the ZnO nanorod, and is characterized in that the two-level structure SnO2 nanorod directly grows on the main structure ZnO nanorod, the ZnO nanorod in a wurtzite structure is prepared through a microwave-assisted hydrothermal method, the SnO2 nanorod of a rutile structure grows on the ZnO nanorod through a microwave-assisted hydrothermal method, and templates and catalysts are not needed in the microwave-assisted hydrothermal process. The speed is high, the process is simple, the yield is high, cost is low, the SnO2/ZnO nanocomposite is suitable for batch production, and the prepared nanocomposite is uniform in form and tight in coating, and can be used as a radar infrared compatible camouflage material, a photocatalysis material, a solar cell material, a gas sensor material and a lithium ion battery cathode material.

Description

technical field [0001] The invention belongs to the field of nanomaterials and relates to a SnO 2 / ZnO nanocomposite material and its preparation method. Background technique [0002] ZnO and SnO 2 It is two important direct wide bandgap semiconductor functional materials. ZnO has a band gap of 3.37eV and an exciton binding energy of 60meV. SnO 2 The band gap is 3.6eV, the exciton binding energy is 130meV, ZnO and SnO 2 Composite materials are widely used in gas sensors, solar cells, photocatalysis, lithium-ion battery anode materials and radar wave absorbing materials. Combining ZnO with SnO 2 These two materials are combined to form SnO 2 / ZnO material, compared with a single material, has significantly improved gas sensitivity and photocatalytic performance, so it is better to control ZnO and SnO during the growth process. 2 The growth of nanomaterials to obtain nanocomposites with good quality and specific hierarchical structure is of great significance in applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02C01G9/02B82Y30/00
CPCC01G19/02C01P2002/72C01P2004/03C01P2004/61C01P2004/62C01P2004/84
Inventor 张志勇许曼章闫军锋贠江妮赵武翟春雪王雪文阮雄飞
Owner NORTHWEST UNIV(CN)
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