Preparation method of cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction photocatalytic composite material with urchin-like structure and application of cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction photocatalytic composite material

A composite material and sea urchin-like technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, inorganic chemistry, etc., can solve the problems of activity decline, low activity of hydrogen production by photo-splitting water, and achieve good application prospects and industrialization potential. The effect of excellent photocatalytic performance

Pending Publication Date: 2018-02-09
INST OF NEW MATERIALS & IND TECH WENZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the surface of CdS is not modified and modified, the activity of photo-splitting water to produce hydrogen is not high, and d...

Method used

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  • Preparation method of cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction photocatalytic composite material with urchin-like structure and application of cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction photocatalytic composite material
  • Preparation method of cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction photocatalytic composite material with urchin-like structure and application of cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction photocatalytic composite material
  • Preparation method of cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction photocatalytic composite material with urchin-like structure and application of cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction photocatalytic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] S1: To an appropriate amount of organic solvent ethylene glycol, add cadmium diethyldithiocarbamate (CED), molybdenum diethyldithiocarbamate (Mo(dedc) 5 ) and tungsten diethyldithiocarbamate (W(dedc) 6 ), fully stir with a magnetic stirrer, mix evenly, and obtain the precursor reaction solution;

[0047] S2: The precursor reaction solution is subjected to a two-stage microwave heating constant temperature reaction to obtain a cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction photocatalytic composite material, specifically:

[0048] S2-1: under the microwave power of 200W, heat the precursor reaction solution obtained in step S1 from room temperature to 90°C, and keep at this temperature for 10 minutes to obtain the first reaction solution;

[0049] S2-2: Continue heating the first reaction solution to 160°C under a microwave power of 500W, and keep it at this temperature for 10 minutes to obtain a second reaction solution;

[0050] S2-3: naturally coo...

Embodiment 2-5

[0051] Embodiment 2-5: the investigation of raw material consumption ratio

[0052] In addition to using different mass ratios of cadmium diethyldithiocarbamate (CED) and molybdenum diethyldithiocarbamate (Mo(dedc) 5 ) and tungsten diethyldithiocarbamate (W(dedc) 6 ) except that other operations are the same as in Example 1, so that Embodiment 2-5 has been carried out, and the used raw material consumption ratio and composite material nomenclature are shown in Table 1 below.

[0053] Table 1. Composite materials prepared under different raw material dosage ratios

[0054]

Embodiment 6-9

[0055] Example 6-9: Investigation of the end temperature of two-stage microwave heating

[0056] Embodiment 6-9: Except using the endpoint temperature shown in the following table 3 in step S3-3, other operation is all the same as embodiment 1, thereby carried out embodiment 6-9, the endpoint used and composite material nomenclature see Table 3 below.

[0057] Table 3. Composites prepared at different endpoint temperatures

[0058]

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Abstract

The invention discloses a preparation method of a cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction photocatalytic composite material with an urchin-like structure. The method comprises the following steps: S1, adding a cadmium source precursor, a molybdenum source precursor and a tungsten source precursor into an organic solvent, sufficiently stirring and uniformly mixing to obtain a precursor reaction solution; S2, carrying out two-stage microwave heating thermostatic reaction on the precursor reaction solution, thus obtaining the cadmium sulfide-molybdenum sulfide-tungstensulfide heterojunction photocatalytic composite material with the urchin-like structure. According to the preparation method, the cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction photocatalytic composite material with excellent hydrogen production performance and the urchin-like structure is obtained by selecting and combining specific process steps and process parameters; the cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction photocatalytic composite material can be applied to the field of hydrogen production by photocatalytic water splitting and has a good application prospect and industrialized potential.

Description

technical field [0001] The invention provides a heterojunction composite material of various semiconductor sulfides and its preparation method and application, more specifically, it provides a cadmium sulfide-molybdenum sulfide-tungsten sulfide heterojunction composite material with a sea urchin-like structure and its The preparation method and application belong to the field of inorganic semiconductor materials. Background technique [0002] In the field of inorganic semiconductor materials, CdS is a typical semiconductor. The CdS photocatalyst has a band gap of 2.4eV at room temperature, and the conduction band potential (-0.87eVvsTHE) and valence band potential (1.5 eV) can meet the conditions for complete photolysis of water. Therefore, CdS can improve the utilization rate of sunlight and become one of the semiconductor catalysts that has attracted much attention in the sulfide system. However, when the surface of CdS is not modified and modified, the activity of photo-...

Claims

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Application Information

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IPC IPC(8): B01J27/051C01B3/04
CPCB01J27/051B01J35/004B01J35/02C01B3/042Y02E60/36
Inventor 刘爱丽凌鹏生霍锐金辉乐王舜王继昌毛心楠
Owner INST OF NEW MATERIALS & IND TECH WENZHOU UNIV
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