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A kind of preparation method of conjugated polyvinyl alcohol modified nano molybdenum disulfide

A technology of polyvinyl alcohol and molybdenum disulfide, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems such as complicated operation, acute poisoning, and catalytic efficiency to be improved

Active Publication Date: 2020-12-11
ANHUI UNIVERSITY
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  • Claims
  • Application Information

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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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  • A kind of preparation method of conjugated polyvinyl alcohol modified nano molybdenum disulfide
  • A kind of preparation method of conjugated polyvinyl alcohol modified nano molybdenum disulfide
  • A kind of preparation method of conjugated polyvinyl alcohol modified nano molybdenum disulfide

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Effect test

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 method for preparing conjugated polyvinyl alcohol-modified nanometer molybdenum disulfide. First, mercaptoethanol is added to a molybdenum disulfide solution and dispersed evenly by ultrasonic, and then freeze-dried to obtain hydroxylated molybdenum disulfide; and then the polyvinyl alcohol solution is added Mix it with hydroxylated molybdenum disulfide and disperse it evenly to obtain a composite solution; dry the resulting mixed solution to remove moisture, and then heat-treat to obtain a conjugated polyvinyl alcohol / hydroxylated molybdenum disulfide composite. Since the composite catalyst prepared by the invention introduces conjugated polyvinyl alcohol, the photocatalytic performance of the composite catalyst is 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 Patents(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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