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MoS2/TiO2 two-dimensional composite nanometer photocatalyst and preparation method and application thereof

A nano-photocatalyst and nano-sheet technology, applied in the field of photocatalysis, can solve the problem of low quantum separation efficiency, and achieve the effects of enhanced photocatalytic performance, high production efficiency, and easy control of the preparation process.

Inactive Publication Date: 2016-07-27
WUHAN UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] But on the other hand, TiO 2 The quantum separation efficiency is relatively low, and the two-dimensional material MoS 2 is an ideal composite matrix, the {001} facet exposed TiO 2 Nanosheets and two-dimensional material MoS 2 Composite preparation of two-dimensional composite photocatalysts is expected to greatly improve their performance
[0006] Based on the above discussion, it can be seen that the preparation of two-dimensional composite photocatalysts is still a problem, especially so far, there is no literature report that can realize the technology and method of two-dimensional composite photocatalyst preparation

Method used

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  • MoS2/TiO2 two-dimensional composite nanometer photocatalyst and preparation method and application thereof
  • MoS2/TiO2 two-dimensional composite nanometer photocatalyst and preparation method and application thereof

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Embodiment 1

[0031] Mix tetrabutyl titanate and HF at a volume ratio of 10:1 to form a precursor solution, place the precursor solution in a hydrothermal reaction kettle for hydrothermal reaction, the temperature of the hydrothermal reaction is 160°C, and the constant temperature time is 15 hours; The solid-liquid mixture after the hydrothermal reaction is subjected to solid-liquid centrifugation, the liquid is discarded, the solid product is washed twice with deionized water, and then dried at 60°C for 6 hours; the dried product is ground into powder to obtain {001} facet exposed TiO 2 Nanoparticles; TiO with {001} faces exposed 2 Nanoparticles, sodium molybdate and thiourea were mixed into a precursor solution according to the mass ratio of 100:3:6, and placed in a hydrothermal reaction kettle for hydrothermal reaction. The temperature of the hydrothermal reaction was 150 ° C, and the constant temperature time was 15 hours; The solid-liquid mixture after the hydrothermal reaction is sub...

Embodiment 2

[0033]Tetrabutyl titanate and HF were mixed into a precursor solution at a volume ratio of 10:2, and the precursor solution was placed in a hydrothermal reaction kettle for hydrothermal reaction. The temperature of the hydrothermal reaction was 170°C, and the constant temperature time was 18 hours; The solid-liquid mixture after the hydrothermal reaction is subjected to solid-liquid centrifugation, the liquid is discarded, the solid product is washed 3 times with deionized water, and then dried at 70°C for 7 hours; the dried product is ground into powder to obtain {001} facet exposed TiO 2 Nanoparticles; TiO with {001} faces exposed 2 Nanoparticles, sodium molybdate and thiourea were mixed into a precursor liquid according to the mass ratio of 100:6:12, and placed in a hydrothermal reaction kettle for hydrothermal reaction. The hydrothermal reaction temperature was 160°C, and the constant temperature time was 20 hours; The solid-liquid mixture after the hydrothermal reaction ...

Embodiment 3

[0035] Tetrabutyl titanate and HF were mixed into a precursor solution at a volume ratio of 10:3, and the precursor solution was placed in a hydrothermal reaction kettle for hydrothermal reaction. The hydrothermal reaction temperature was 180°C, and the constant temperature time was 24 hours; The solid-liquid mixture after thermal reaction is subjected to solid-liquid centrifugal separation, the liquid is discarded, the solid product is washed 4 times with deionized water, and then dried at 80°C for 8 hours; the dried product is ground into powder to obtain { 001} facet exposed TiO 2 Nanoparticles; TiO with {001} faces exposed 2 Nanoparticles, sodium molybdate and thiourea were mixed into a precursor solution according to the mass ratio of 100:15:30, and placed in a hydrothermal reaction kettle for hydrothermal reaction. The hydrothermal reaction temperature was 170°C, and the constant temperature time was 25 hours; The solid-liquid mixture after the hydrothermal reaction is s...

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Abstract

The invention discloses a MoS2 / TiO2 two-dimensional composite nanometer photocatalyst and a preparation method and application thereof. Tetrabutyl titanate and HF are subjected to a hydrothermal reaction, and TiO2 nano particles with exposed {001} faces are prepared; then, the TiO2 nano particles with the exposed {001} faces, sodium molybdate and thiourea are subjected to a hydrothermal reaction together, wherein the mass ratio of sodium molybdate to thiourea is 1:2, the solid products are dried and ground into powder, and the MoS2 / TiO2 two-dimensional composite nanometer photocatalyst is obtained. The prepared MoS2 / TiO2 two-dimensional composite nanometer photocatalyst is small in particle size, the specific area can reach 110 m<2> / g, and very high photocatalytic activity is achieved. The preparation method is simple in process, easy to control and high in production efficiency, and has important application prospects in the environment pollution treatment field.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular to a MoS 2 / TiO 2 Two-dimensional composite nano photocatalyst and its preparation method and application. Background technique [0002] Photocatalysis refers to the use of semiconductors to absorb solar energy and convert it into chemical energy to degrade organic matter. This method is efficient and does not cause secondary pollution. It is a new direction for environmental governance, and the key to photocatalytic technology is suitable Catalyst selection and preparation. transition metal oxide TiO 2 It has the advantages of non-toxic and harmless, high catalytic efficiency, good stability, and low cost. It is an ideal photocatalyst material and has great application prospects. [0003] TiO 2 There are two stable crystal phases, anatase and rutile, and the more active anatase phase is generally used for photocatalysis. The surface energy of different crystal faces of anatase v...

Claims

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Application Information

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IPC IPC(8): B01J27/051C02F1/30C02F1/32B01D53/86C02F101/38
CPCB01D53/86C02F1/30C02F1/32B01J27/051B01J37/10C02F2101/308C02F2101/38C02F2305/10B01J35/39B01J35/615
Inventor 潘春旭张峻罗成志
Owner WUHAN UNIV
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