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Preparation method of conjugate polyvinyl alcohol modified nano molybdenum disulfide

A polyvinyl alcohol, molybdenum disulfide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of catalysis efficiency to be improved, acute poisoning, high cost, etc., and achieve good catalysis Reduced effect, good visible light absorption, improved photocatalytic effect

Active Publication Date: 2018-09-07
ANHUI UNIVERSITY
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Problems solved by technology

Hexavalent chromium ions have high biological toxicity and can cause acute poisoning. Long-term exposure can easily cause various cancers such as lung cancer and nasopharyngeal cancer, which is very harmful to the environment and human health.
[0005] Although the molybdenum disulfide-antimony sulfide composite material has a catalytic effect, the catalytic efficiency of the molybdenum disulfide-antimony sulfide composite material needs to be improved, the operation is complicated, and the cost is high

Method used

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  • Preparation method of conjugate polyvinyl alcohol modified nano molybdenum disulfide
  • Preparation method of conjugate polyvinyl alcohol modified nano molybdenum disulfide
  • Preparation method of conjugate polyvinyl alcohol modified nano molybdenum disulfide

Examples

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Embodiment 1

[0029] This embodiment prepares the conjugated polyvinyl alcohol / hydroxylated molybdenum disulfide complex according to the following steps:

[0030] 1. Preparation of lamellar molybdenum disulfide

[0031] Add 1g of molybdenum disulfide powder into a three-necked flask, then add 10mL of n-butyllithium, and stir for three days under a nitrogen atmosphere. The obtained product was dried in a constant temperature drying oven at 60°C for 4 hours, and the dried powder was dissolved in 250 mL of deionized water, ultrasonically dispersed for 12 hours, and then freeze-dried at -50°C for 24 hours to obtain lamellar molybdenum disulfide.

[0032] 2. Preparation of hydroxylated molybdenum disulfide

[0033] Disperse 0.7g lamellar molybdenum disulfide in 200mL deionized water, add 2mL mercaptoethanol, ultrasonicate for 48 hours, then freeze-dry at -50°C for 24 hours, wash and dry the freeze-dried product with ethanol to obtain hydroxylated disulfide molybdenum.

[0034] 3. Preparation...

Embodiment 2

[0037] In this example, the conjugated polyvinyl alcohol / hydroxylated molybdenum disulfide composite is prepared according to the same method as in Example 1, the only difference being that the mass ratio of the polyvinyl alcohol (0.0005 g) to the hydroxylated molybdenum disulfide in step 3 is 0.5%, the resulting conjugated polyvinyl alcohol / hydroxylated molybdenum disulfide complex is denoted as CPVA / MoS 2 -OH-0.5 wt%.

Embodiment 3

[0039] In this example, the conjugated polyvinyl alcohol / hydroxylated molybdenum disulfide composite was prepared according to the same method as in Example 1, the only difference being that the mass ratio of the polyvinyl alcohol (0.0010 g) to the hydroxylated molybdenum disulfide in step 3 was 1.0%, the resulting conjugated polyvinyl alcohol / hydroxylated molybdenum disulfide complex is denoted as CPVA / MoS 2 -OH-1wt%.

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Abstract

The invention discloses a preparation method of conjugate polyvinyl alcohol modified nano molybdenum disulfide. The preparation method comprises the following steps: adding mercaptoethanol into a molybdenum disulfide solution, ultrasonically uniformly dispersing, and freeze-drying to obtain hydroxylated molybdenum disulfide; mixing a polyvinyl alcohol solution and the hydroxylated molybdenum disulfide, and uniformly dispersing, thus obtaining a composite solution; and drying the mixed solution to remove the water, and performing the heat treatment, thus obtaining the conjugate polyvinyl alcohol / hydroxylated molybdenum disulfide complex. According to a composite catalyst obtained by the invention, the conjugate polyvinyl alcohol is introduced, so that the photocatalytic performance of the composite catalyst can be greatly improved.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of conjugated polyvinyl alcohol-modified nanometer molybdenum disulfide, which belongs to the technical field of catalysts. Background technique [0002] Chromium and its compounds are common industrial raw materials, widely used in metallurgy, electroplating, printing and dyeing, leather and other industries, resulting in a large amount of chromium-containing wastewater, and the content of hexavalent chromium ions seriously exceeds the standard. Hexavalent chromium ions are highly soluble and mobile in water and are not biodegradable. Hexavalent chromium ions have high biological toxicity and can cause acute poisoning. Long-term exposure can easily cause various cancers such as lung cancer and nasopharyngeal cancer, which is very harmful to the environment and human health. Traditional chromium-containing wastewater treatment methods are physical and ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J31/34
CPCB01J31/06B01J31/34B01J35/39
Inventor 周艺峰汪康陈鹏鹏聂王焰徐颖
Owner ANHUI UNIVERSITY
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