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Core-shell spherical molybdenum trioxide/molybdenum disulfide and preparation method thereof

A spherical, core-shell technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of short photocatalytic degradation time, large amount of photocatalyst addition, long photocatalytic degradation time, etc. , to reduce the photocatalytic time, improve the photocatalytic effect, and increase the nucleation rate

Inactive Publication Date: 2017-06-09
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the TiO produced by the above technique 2 / MoS 2 In the process of photocatalytic degradation of organic dyes, core-shell microspheres still have the defects of long photocatalytic degradation time and high photocatalyst addition amount. Therefore, how to provide a photocatalyst with short photocatalytic degradation time and less photocatalyst addition amount It is a technical problem that needs to be solved urgently in this field

Method used

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  • Core-shell spherical molybdenum trioxide/molybdenum disulfide and preparation method thereof
  • Core-shell spherical molybdenum trioxide/molybdenum disulfide and preparation method thereof
  • Core-shell spherical molybdenum trioxide/molybdenum disulfide and preparation method thereof

Examples

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Embodiment 1

[0046] This embodiment provides a core-shell spherical MoO 3 / MoS 2 and its preparation method. Described preparation method comprises the steps:

[0047] (1) Weigh 0.4319g molybdenum trioxide (MoO 3 ) (3mmol) was added to the deionized water of 20ml, and under magnetic stirring, molybdenum trioxide suspension was obtained, and 0.07287g (0.2mmol) cetyltrimethylammonium bromide (CTAB) was added thereto, and magnetic stirring made It is completely dissolved in the molybdenum trioxide suspension to obtain a molybdenum source solution;

[0048] Weigh 0.8017g of potassium thiocyanate (KSCN) (8mmol) and add it to 20ml of deionized water, under magnetic stirring, to obtain a sulfur source solution;

[0049] (2) Add the sulfur source solution dropwise to the molybdenum source solution at 0.02ml / s, magnetically stir the two to mix evenly, and adjust the pH to 8 to obtain a mixed solution;

[0050] (3) Move the mixed solution to a 50ml autoclave for hydrothermal reaction, and contr...

Embodiment 2

[0058] This embodiment provides a core-shell spherical MoO 3 / MoS 2 and its preparation method. Described preparation method comprises the steps:

[0059] (1) The ammonium molybdate that takes 2mmol is added to the deionized water of 20ml, under magnetic stirring, obtains ammonium molybdate aqueous solution, and the cetyltrimethylammonium bromide (CTAB) that adds 0.2mmol wherein, magnetic force Stir to make it completely dissolved in the ammonium molybdate aqueous solution to obtain a molybdenum source solution;

[0060] Weigh 6mmol of thiourea and add it to 20ml of deionized water, under magnetic stirring, to obtain a sulfur source solution;

[0061] (2) Add the sulfur source solution dropwise to the molybdenum source solution at 0.05ml / s, magnetically stir the two to mix evenly, and adjust the pH to 9 to obtain a mixed solution;

[0062] (3) Move the mixed solution to a 50ml autoclave for hydrothermal reaction, and control the temperature of the hydrothermal reaction to ...

Embodiment 3

[0070] This embodiment provides a core-shell spherical MoO 3 / MoS 2 and its preparation method. Described preparation method comprises the steps:

[0071] (1) The ammonium molybdate that takes 4mmol is added to the deionized water of 20ml, under magnetic stirring, obtains ammonium molybdate aqueous solution, and the cetyltrimethylammonium bromide (CTAB) of wherein adding 0.8mmol, magnetic force Stir to make it completely dissolved in the ammonium molybdate aqueous solution to obtain a molybdenum source solution;

[0072] Weigh 2mmol of sodium thiosulfate and add it to 20ml of deionized water, and stir magnetically to prepare a sulfur source solution;

[0073] (2) Add the sulfur source solution dropwise to the molybdenum source solution at 0.008ml / s, magnetically stir the two to mix evenly, and adjust the pH to 12 to obtain a mixed solution;

[0074] (3) Move the mixed solution to a 50ml autoclave for hydrothermal reaction, and control the temperature of the hydrothermal re...

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Abstract

The invention discloses a core-shell spherical MoO3 / MoS2 and a preparation method thereof. The preparation method comprises the following steps: mixing a molybdenum source, deionized water and a cationic surfactant to obtain a molybdenum source solution; mixing a sulfur source and deionized water to obtain a sulfur source solution; mixing the molybdenum source solution and sulfur source solution to obtain a mixed solution, and regulating the pH value of the mixed solution to alkalinity; carrying out hydrothermal reaction on the mixed solution subjected to pH regulation to obtain a reaction product; and sequentially carrying out washing and drying on the reaction product to obtain the core-shell spherical MoO3 / MoS2. The prepared core-shell spherical MoO3 / MoS2 has excellent photocatalytic effects. A small amount of the core-shell spherical MoO3 / MoS2 can completely perform photocatalytic degradation on organic dyes in a short time.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a core-shell spherical MoO 3 / MoS 2 and its preparation method. Background technique [0002] Molybdenum disulfide (MoS) nanoparticles 2 ) has broad application prospects in electronic probes, petroleum catalysis, hydrogen storage materials, friction lubrication, and solar cells due to its high specific surface area and good optical, electrical, lubricating, and catalytic properties. Molybdenum disulfide is a direct narrow band gap semiconductor with a band gap of 1.29-1.9eV, which is close to the optimal band gap (1.45eV) of solar cell materials. Therefore, it is also widely used in the field of photocatalysis. [0003] Because the performance of inorganic nanomaterials is closely related to its preparation method, shape, and size, researchers continue to try various methods to prepare nano-molybdenum disulfide with different shapes and sizes in order to imp...

Claims

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Application Information

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IPC IPC(8): B01J27/051C02F1/30C02F101/30
CPCC02F1/30B01J27/051C02F2305/10C02F2101/308B01J35/51B01J35/40B01J35/39
Inventor 李文江李莹
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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