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Preparation method of metal phase molybdenum disulfide/two-dimensional carbon nitride photocatalytic material

A photocatalytic material, molybdenum disulfide technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of limited earth reserves, expensive platinum, etc., and achieve low cost and preparation Simple method, high activity effect

Inactive Publication Date: 2017-06-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the traditional photo-splitting water system, it is necessary to add noble metal platinum as a co-catalyst to achieve efficient hydrogen production. Platinum is expensive and the earth’s reserves are limited. Therefore, it is also an important research direction to explore cheap and stable photo-water-splitting co-catalysts that replace platinum.

Method used

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  • Preparation method of metal phase molybdenum disulfide/two-dimensional carbon nitride photocatalytic material
  • Preparation method of metal phase molybdenum disulfide/two-dimensional carbon nitride photocatalytic material
  • Preparation method of metal phase molybdenum disulfide/two-dimensional carbon nitride photocatalytic material

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Embodiment 1

[0025] Embodiment 1: The preparation of metallic phase (1T) molybdenum disulfide / two-dimensional thin layer carbon nitride visible light composite photocatalyst comprises the following steps:

[0026] (1) Put melamine in a ceramic crucible with a cover, heat up to 550°C in a muffle furnace at a rate of 2°C / min and calcinate for 4h to obtain a yellow substance that is ground into powder, and then spread 500mg of the yellow powder on the ark In a muffle furnace, the temperature was raised to 550° C. for 1 h at a rate of 5° C. / min, and then the temperature was raised to 550° C. for 1 h at a rate of 2° C. / min to obtain two-dimensional carbon nitride.

[0027] (2) Add 30ml of dimethylformamide into the beaker, then add 100mg of carbon nitride, 0.0003g of molybdenum pentachloride, and 2.25g of thioacetamide into the beaker, stir for 30min, and disperse by ultrasonication for 30min.

[0028] (3) Transfer the mixed solution to a high-pressure reactor, and place the reactor in an oven ...

Embodiment 2

[0029] Embodiment 2: the preparation of metallic phase (1T) molybdenum disulfide / two-dimensional carbon nitride visible light composite photocatalyst comprises the following steps:

[0030] (1) Put melamine in a ceramic crucible with a cover, heat up to 550°C for 4 hours in a muffle furnace at a rate of 2°C / min and calcinate to obtain a yellow substance that is ground into powder, and then spread 400 mg of the yellow powder in the ark In a muffle furnace, the temperature was raised to 550° C. for 1 h at a rate of 5° C. / min, and then the temperature was raised to 550° C. for 1 h at a rate of 2° C. / min to obtain two-dimensional carbon nitride.

[0031] (2) Add 30ml of dimethylformamide into the beaker, then add 100mg of carbon nitride, 0.0007g of molybdenum pentachloride, and 2.25g of thioacetamide into the beaker, stir for 30min, and disperse by ultrasonication for 30min.

[0032] (3) Transfer the mixed solution to a high-pressure reactor, and place the reactor in an oven at 20...

Embodiment 3

[0033] Embodiment 3: the preparation of metallic phase (1T) molybdenum disulfide / two-dimensional carbon nitride visible light composite photocatalyst comprises the following steps:

[0034] (1) Put melamine in a ceramic crucible with a cover, heat up to 550°C in a muffle furnace at a rate of 2°C / min and calcinate for 4h to obtain a yellow substance that is ground into powder, and then spread 500mg of the yellow powder on the ark In a muffle furnace, the temperature was raised to 550° C. for 1 h at a rate of 5° C. / min, and then the temperature was raised to 550° C. for 1 h at a rate of 2° C. / min to obtain two-dimensional carbon nitride.

[0035] (2) Add 30ml of dimethylformamide into the beaker, then add 100mg of carbon nitride, 0.0017g of molybdenum pentachloride, and 2.25g of thioacetamide into the beaker, stir for 30min, and disperse by ultrasonication for 30min.

[0036] (3) Transfer the mixed solution to a high-pressure reactor, and place the reactor in an oven at 200° C. ...

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Abstract

The invention discloses a composite photocatalyst of metal phase molybdenum disulfide and two-dimensional carbon nitride and a preparation method of the photocatalyst. The material is formed by compounding molybdenum disulfide and carbon nitride according to a mass ratio of (1 to 1000) to (5 to 1000), wherein the molybdenum disulfide is a metal phase 1T, and the carbon nitride has a two-dimensional thin layer structure. The preparation method of the material comprises the following steps: (1) dispersing two-dimensional thin-layer carbon nitride, molybdenum pentachloride and thioacetamide in DMF (Dimethyl Formamide), stirring, and ultrasonically dispersing; (2) adding an obtained mixed solution into a high-pressure reaction kettle for high-temperature processing; (3) washing the processed substance for multiple times by virtue of ethanol and deionized water; and (4) freeze drying the washed substance to obtain the prepared photocatalyst. The photocatalyst prepared by the invention has good performance of decomposing water to generate hydrogen under the visible light and does not need precious metal platinum serving as an assistant catalyst. The preparation process is simple, the energy consumption is low, the cost is low, and the photocatalyst is easy to realize.

Description

technical field [0001] The invention relates to a photocatalytic material, in particular to the preparation and application of a metal phase (1T) molybdenum disulfide / two-dimensional thin-layer carbon nitride visible light composite photocatalyst, and belongs to the technical field of composite materials and photolysis of water for hydrogen production. Background technique [0002] Since the 1970s, the traditional energy shortage and the development of new energy have been widely concerned by academic circles and society. As a green energy that can be obtained by splitting water, hydrogen energy has the potential to become an alternative to traditional energy. For a long time, the research on the photo-splitting of water based on titanium dioxide and other semiconductors has been very well developed, but the limited light utilization efficiency of traditional semiconductors, the low quantum efficiency of catalysts, and the excessive demand for the co-catalyst precious metal ...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/39
Inventor 佘小杰许晖李华明徐远国赵岩宋艳华宜坚坚
Owner JIANGSU UNIV
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