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CdS-MoS2 nanoparticle co-doped black porous titanium dioxide photocatalyst

A nanoparticle, co-doping technology, applied in physical/chemical process catalysts, inorganic chemistry, hydrogen/syngas production, etc., can solve the problem of no reports on photocatalytic water splitting, and achieve the effect of high catalytic activity

Inactive Publication Date: 2017-07-28
ANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in situ preparation of CdS-MoS 2 Nanoparticles co-doped black porous TiO 2 Photocatalysts and studies on their photocatalytic water splitting properties have not been reported

Method used

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  • CdS-MoS2 nanoparticle co-doped black porous titanium dioxide photocatalyst
  • CdS-MoS2 nanoparticle co-doped black porous titanium dioxide photocatalyst
  • CdS-MoS2 nanoparticle co-doped black porous titanium dioxide photocatalyst

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Experimental program
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Effect test

Embodiment 1

[0025] The molar ratio of embodiment 1 is 3%CdS-3%MoS 2 Nanoparticle co-doped black porous TiO 2 Synthesis of photocatalyst:

[0026] Add 1.5 mL of tetrabutyl titanate to a solution containing 1.5 mL of glacial acetic acid, 3 mL of deionized water and 10 mL of ethanol, and keep the above solution at 60°C for 12 hours to form a sol. Add 300mg of polystyrene balls, 35.2mg of cadmium acetate and 23.3mg of ammonium paramolybdate to the above sol-gel, and stir for 30min, then transfer to the reactor, and keep the temperature at 70°C for 12h to promote the formation of sol-gel again , and then the newly prepared sol-gel was calcined at 450°C for 6h under the condition of oxygen to obtain porous 3% MoO 3 -3%CdO-TiO 2 Intermediate product; 3% MoO will be prepared 3 -3%CdO-TiO 2 The intermediate product was added to an aqueous solution containing 300 mg of sodium borohydride and 30 mL of ethylenediamine, ultrasonicated for 30 minutes, then transferred to a reaction kettle, kept at...

Embodiment 2

[0028] Prepared according to the method described in Example 1 to obtain different MoS 2 -Black porous TiO with CdS doping 2 The results of photocatalyst and hydrogen production rate are shown in Table 1.

[0029] Table 1

[0030] Numbering Sample (MoS 2 molar ratio)

Embodiment 3

[0031] Example 3 MoS 2 -CdS nanoparticles co-doped black porous TiO 2 Characterization of photocatalyst complexes

[0032] (1) X-ray powder diffraction (XRD) characterization

[0033] The XRD test was carried out by a D8ADVANCE X-ray diffractometer produced by Germany Bruker Company. The test conditions are: the Kα radiation excited by the Cu target is the ray source, the Ni filter, the light source wavelength λ is 0.15406nm, the working voltage is 40kV, the current is 40mA, the scanning range is 20-80°, and the scanning speed is 4° / min .

[0034](2) Scanning electron microscope (SEM) characterization

[0035] It is mainly used to observe the microscopic morphology and particle size of the photocatalytic materials prepared in the experiment. The LEO1530VP field emission scanning electron microscope produced by Germany LEO Company was used for testing. Instrument parameters: resolution: 1nm (20kV); magnification: 20X-900,000X; acceleration voltage: 0.1-30kV. Due to the p...

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Abstract

The invention relates to a TiO2 photocatalyst and in particular relates to a CdS-MoS2 nanoparticle co-doped black porous TiO2 photocatalyst and a preparation method thereof and a performance study by producing hydrogen by water photolysis, and belongs to the field of semiconductor materials. The catalyst is prepared by the steps: firstly, synthesizing porous MoO3-CdO-TiO2; hydrogenating the porous MoO3-CdO-TiO2 under the supporting action of ethidene diamine to obtain black MoO3-CdO-TiO2; and then performing in-situ vulcanization in a solvothermal condition to obtain black MoS2-CdS-TiO2. As CdS can absorb visible light, MoS2 can effectively transfer photon-generated carriers and black TiO2 can effectively enhance the photon-to-electron conversion efficiency, the catalyst shows an excellent performance of producing hydrogen by photo-catalytic decomposition of water. The speed of producing hydrogen by water photolysis reaches 4527 umol.h<-1>g<-1>. Therefore, a novel path for preparing a novel photocatalyst under visible lights can be provided.

Description

technical field [0001] The present invention relates to TiO 2 Photocatalyst, in particular to a CdS-MoS 2 Nanoparticle co-doped black porous TiO 2 The photocatalyst and its preparation method and the research on the hydrogen production performance of photo-splitting water belong to the field of semiconductor materials. Background technique [0002] As a semiconductor material, titanium dioxide has attracted much attention because of its low cost, good hydrophilicity, high catalytic activity, non-toxicity and pollution-free. However, titanium dioxide has a wide band gap (3.2eV), a narrow spectral response range and can only absorb ultraviolet light accounting for 4% of sunlight. The photocatalytic application of titanium dioxide is greatly limited. Therefore, in order to improve the photocatalytic activity of titanium dioxide, many researchers have carried out a lot of research work to improve its catalytic activity, such as metal ion doping, rare earth ion doping, noble ...

Claims

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Application Information

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IPC IPC(8): B01J27/051C01B3/04B01J35/10
CPCC01B3/042B01J27/051C01B2203/0277B01J35/39B01J35/613B01J35/633Y02E60/36
Inventor 刘雷雷杜记民余彩霞王慧鸣杨梦可
Owner ANYANG NORMAL UNIV
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