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Method for preparing nanometer ZnS/cellulose complex film with photocatalytic activity

A photocatalytic activity, cellulose technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, chemical/physical processes, etc., can solve problems such as easy agglomeration and poor stability of inorganic nano-ZnS particles , to achieve the effect of improving catalytic activity, simple equipment, low consumption of chemical raw materials and low energy consumption

Inactive Publication Date: 2015-09-02
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Selecting organic polymer cellulose membranes as carrier materials for inorganic nanomaterials is beneficial to improve the poor stability and easy aggregation of inorganic nano ZnS particles, improve the catalytic activity of catalysts, and facilitate the separation and recovery of catalysts

Method used

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  • Method for preparing nanometer ZnS/cellulose complex film with photocatalytic activity
  • Method for preparing nanometer ZnS/cellulose complex film with photocatalytic activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Preparation of Cellulose Membrane

[0034] One of the 2g cotton pulp cellulose, wood pulp cellulose or straw pulp cellulose after pulverization is added to the NMMO solvent and 0.02g ascorbic acid (mass approx. 1% of the element weight) in a beaker, prepare a casting solution with a cellulose content of about 6%, and stir evenly; after swelling for 2 hours, put it in a vacuum drying oven at 110°C to dissolve completely, and wait until the solution is amber and uniform When the solution is transparent, place it at 80°C for vacuum defoaming for 4 hours, and scrape the film; then, treat it with a coagulation bath (about 25°C deionized water) and a water bath (about 25°C deionized water) to obtain wet pure cotton pulp fibers plain film.

[0035] 2. Preparation of nano-ZnS / cellulose composite membrane material with photocatalytic activity

[0036] Cut the above wet film into a film with a size of 10cm×15cm, soak it in 0.1M zinc sulfate precursor solution, react for 5h, ...

Embodiment 2

[0038] 1. Preparation of Cellulose Membrane

[0039] The preparation of the cellulose film was the same as in Example 1.

[0040] 2. Preparation of nano-ZnS / cellulose composite membrane material with photocatalytic activity

[0041] Cut the above wet film into a film with a size of 10cm×15cm, soak it in 0.1M zinc sulfate precursor solution, react for 5h, take it out and rinse it with deionized water; then put it into 0.1M sodium sulfide After reacting for 5 hours in the precursor solution, take it out and rinse it with deionized water. The above process is a cycle, and then the second cycle of impregnation experiment is carried out. After the impregnation is completed, the sample film is naturally dried at room temperature to obtain a nano-ZnS / cellulose composite membrane material with photocatalytic activity that is impregnated twice.

Embodiment 3

[0043] 1. Preparation of Cellulose Membrane

[0044] The preparation method of the cellulose film is the same as that of Example 1.

[0045] 2. Preparation of nano-ZnS / cellulose composite membrane material with photocatalytic activity

[0046]Cut the above wet film into a film with a size of 10cm×15cm, soak it in 0.1M zinc sulfate precursor solution, react for 5h, take it out and rinse it with deionized water; then put it into 0.1M sodium sulfide After reacting for 5 hours in the precursor solution, take it out and rinse it with deionized water. The above process is a cycle, and then repeat the impregnation experiment twice. After the impregnation is completed, the sample film is naturally dried at room temperature to obtain a nano-ZnS / cellulose composite membrane material with photocatalytic activity that has been impregnated three times.

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Abstract

The invention discloses a method for preparing a nanometer ZnS / cellulose complex film with photocatalytic activity. The method comprises the following steps: adopting an NMMO process to prepare a pure cotton pulp cellulose film, and then adopting a liquid impregnation method to prepare the nanometer ZnS / cellulose complex film; renewable resources which are rich in source, safe, nontoxic, and low in cost are utilized as raw materials to prepare a cellulose based composite. The process flow is simple, the preparation process is environment-friendly and pollution-free, and the obtained nanometer ZnS / cellulose complex film has excellent performance of degrading water body pollutant by ultraviolet absorption and photocatalysis; the property of the pure cellulose film, such as excellent chemical resistance stability and heat stability, are retained; the nanometer ZnS / cellulose complex film also has excellent photoelectric and photocatalytic performance, and can be widely applied to photoelectric devices, luminous materials, wastewater treatment materials, biomedical materials and the like.

Description

technical field [0001] The invention relates to the combination of inorganic nano-semiconductor ZnS particles and natural organic polymer cellulose film to prepare a nano-ZnS / cellulose composite film with photocatalytic function, which can effectively photocatalyze and degrade organic dyes in sewage, and can be widely used in chemical industry, Biomedical and environmental protection and other fields. Background technique [0002] Inorganic nano-ZnS particles are an important metal chalcogenide semiconductor material, which has unique properties such as quantum size effect, volume effect, surface effect and quantum tunneling effect. Excellent performance, has broad application prospects. [0003] Inorganic nano-ZnS is safe and non-toxic, has a wide bandgap between 3.6 and 3.8eV, strong absorption and excellent photoelectric catalytic performance, and is widely used as a luminescent material, nonlinear optical material and photocatalytic material. However, due to the small ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D69/12B01D67/00B01D71/12B01J31/26C02F1/44C02F1/32
Inventor 余群燕李文江蒋一正
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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