MoSe2 nanosheet composite fireworks-shaped TiO2 nanorod array and preparation method thereof

A nanorod array and fireworks-like technology, which is applied in the field of MoSe2 nanosheet composite fireworks-like TiO2 nanorod array and its preparation, can solve the problems of inapplicability to large-scale industrial production, high production costs, and harsh reaction conditions, and achieve excellent optical performance. Catalytic degradation performance, low cost, and highly reproducible results

Inactive Publication Date: 2016-08-10
EAST CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, most of the existing preparation methods have harsh reaction conditions, complex sy

Method used

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  • MoSe2 nanosheet composite fireworks-shaped TiO2 nanorod array and preparation method thereof
  • MoSe2 nanosheet composite fireworks-shaped TiO2 nanorod array and preparation method thereof
  • MoSe2 nanosheet composite fireworks-shaped TiO2 nanorod array and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 prepares MoSe 2 Nanosheet Composite Firework-like TiO 2 nanorod array

[0040] The specific steps of preparation are as follows:

[0041] (1) Add 1mL of 35% hydrochloric acid to the prepared conical flask with a capacity of 20ml, and then add 2mL of tetrabutyl titanate, shake the conical flask slightly by hand to make the solution fully mix and react, and wait until the reaction heat is completely Disperse, slowly drop into 20mL of oleic acid, stir well.

[0042] (2) After stirring for more than 15 minutes, add the mixed solution into a 50mL reaction kettle, seal it, then put it into a vacuum oven and heat it at 180°C for 4 hours, and cool to room temperature after the reaction.

[0043] (3) Carefully collect and take out the milky white precipitate at the bottom of the reaction kettle and the milky white attachment on the inner wall, and wash it repeatedly with absolute ethanol water until the supernatant is completely clear.

[0044] (4) Pour off the ...

Embodiment 2

[0050] Example 2 MoSe of the present invention 2 Nanosheet Composite Firework-like TiO 2 Specific Surface Area Measurement of Nanorod Arrays

[0051] Utilize BET test method to the MoSe of the present invention that above-mentioned embodiment 1 prepares 2 Nanosheet Composite Firework-like TiO 2 The specific surface area of ​​the nanorod array is tested, including specific steps:

[0052] (1) Open the gas, open the nitrogen and helium of the system respectively, and control the air pressure at 0.25MPa.

[0053] (2) Weigh 0.5g and 0.3g of TiO respectively 2 Nanorod arrays and MoSe 2 Nanosheet Composite Firework-like TiO 2 The nanorod array is loaded into the U-shaped tube of the experimental equipment, and the sample is loaded.

[0054] (3) Pour a small amount of liquid nitrogen into a 200ml beaker to cool the beaker, and then add liquid nitrogen to a place 1cm away from the top of the beaker.

[0055] (4) Turn on the instrument switch, adjust the flow ratio of nitrogen ...

Embodiment 3

[0059] Example 3 MoSe of the present invention 2 Nanosheet Composite Firework-like TiO 2 Photocatalytic Degradation Ability Test of Nanorod Arrays

[0060] The MoSe of the present invention prepared in the above-mentioned embodiment 1 2 Nanosheet Composite Firework-like TiO 2 The nanorod array, according to Example 2, has a larger specific surface area. Due to the present invention MoSe 2 Nanosheet Composite Firework-like TiO 2 The specific surface area of ​​the nanorod array is significantly improved after compounding, and a p-n junction is formed at the junction, and the distribution of a large number of quantum dots is conducive to electronic excitation, which makes it compared with pure MoS 2 The photocatalytic performance of nanoflowers has been significantly improved. MoSe of the present invention 2 Nanosheet Composite Firework-like TiO 2 Nanorod arrays, pure TiO 2 Nanorod arrays with MoSe 2 Field emission performance test of nanosheets, including specific step...

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Abstract

The invention discloses a MoSe 2 Nanosheet Composite Firework-like TiO 2 Nanorod arrays, which include TiO 2 Nanorod arrays and MoSe 2 nanosheets; the MoSe 2 nanosheets are uniformly and massively distributed in the TiO 2 The surface of the nanorod array has good recombination on the array surface; the TiO 2 Nanorod arrays are made of TiO 2 self-assembled nanorods. The present invention also discloses that the MoSe 2 Nanosheet Composite Firework-like TiO 2 Fabrication of nanorod arrays using a two-step solvothermal method to make MoSe 2 Nanosheets uniformly grown on fireworks-like TiO 2 On the nanorod array, a material with good composite morphology is obtained. The prepared semiconductor material has increased spectral absorption range and specific surface area, reduced carrier recombination probability, good photocatalytic degradation performance, and has great application potential in the field of photocatalytic degradation. The preparation method of the invention has the advantages of simple operation, high yield, low preparation cost and the like.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic materials, semiconductor materials and devices, and specifically relates to a MoSe 2 Nanosheet Composite Firework-like TiO 2 Nanorod arrays and methods of making them. Background technique [0002] MoSe 2 It is a transition metal chalcogenide compound with a narrow band gap, and it is also a typical two-dimensional layered semiconductor material, and the layers are combined by weak van der Waals forces. In recent years, new two-dimensional semiconductor materials have rapidly become the research frontier in the field of materials science, and MoSe 2 Compared with other two-dimensional layered materials, it has a smaller band gap and excellent mobility characteristics, making MoSe 2 It has a wide range of applications in lithium-ion batteries, photocatalysis, and low-dimensional optoelectronic device platforms. On the other hand, the rutile TiO 2 It is a metal oxide with a wide band ga...

Claims

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Application Information

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IPC IPC(8): B01J27/057B01J35/08B01J35/10B01J37/10C02F1/30C02F101/38
CPCB01J27/0573B01J35/004B01J35/08B01J35/1004B01J37/10C02F1/30C02F2101/308C02F2101/40C02F2305/10
Inventor 雷祥郁可朱自强
Owner EAST CHINA NORMAL UNIVERSITY
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