Photochemical preparation method of chitosan loaded metal sulfide photocatalyst
A technology of supporting metals and photocatalysts, applied in the direction of catalyst activation/preparation, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem that the improvement of photocorrosion performance is not obvious and affects the sulfidation of semiconductor metals Photocatalytic properties of materials, unfavorable in-situ compounding of organic polymer materials, etc., to achieve the effect of low equipment requirements, mild reaction conditions, and no pollution to the environment
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[0037] The embodiment of the present invention provides a preparation method of a chitosan-loaded metal sulfide photocatalyst, which uses the adsorption performance of chitosan on metal ions to prepare a chitosan-loaded metal sulfide photocatalyst through a photochemical reaction. The metal sulfides were generated in situ between chitosan molecules and distributed in nanometer state. The catalyst preparation method specifically comprises the following steps: preparing a chitosan metal ion complex, making a precursor solution with an aqueous solution containing a sulfur source, performing a photocatalytic reaction, filtering, washing, and drying the reaction product to obtain a chitosan-loaded metal Sulfide photocatalyst.
[0038] Above-mentioned preparation method comprises the steps:
[0039] (1) prepare chitosan solution: the chitosan of certain weight part is dissolved in the acidic solution that 100~500 parts by weight concentration is 0.2~5% (weight ratio), adjust pH val...
Embodiment 1
[0053] The present embodiment provides a kind of preparation method of chitosan-loaded CdS photocatalyst, is to utilize photochemical method to prepare the method for chitosan-loaded CdS photocatalyst, specifically carry out according to the following steps:
[0054] Take by weighing 5g molecular weight respectively and be 400,000, the chitosan that deacetylation degree is 85.5% and 4.664g cadmium acetate dihydrate (17.5mmol) join in the acetic acid solution that 200g concentration is 2.5wt%, preparation concentration is 25g / L Chitosan solution, stirred at 50°C for 2.5h to obtain chitosan Cd 2+ Complex solution; under stirring condition, in above-mentioned complex solution, drip the NaOH solution that concentration is 0.3mol / L, adjust solution pH value to near 7.3, the chitosan Cd that will separate out 2+ The complex particles were filtered and washed to obtain chitosan Cd 2+ Complex particles; the above-mentioned complex particles are dispersed in 100g deionized water, and ...
Embodiment 2
[0056] The present embodiment provides a kind of preparation method of chitosan-loaded CuS photocatalyst, is to utilize photochemical method to prepare the method for chitosan-loaded CuS photocatalyst, specifically carry out according to the following steps:
[0057] Weighing 3g of chitosan with a molecular weight of 100,000 and a degree of deacetylation of 95% and 3.0836g of copper nitrate monohydrate (15mmol) were added to 150g of hydrochloric acid solution with a mass concentration of 0.2wt%, and the preparation concentration was 20g / L Chitosan solution, stirred at 30°C for 1 h to obtain chitosan Cu 2+ Complex solution; under stirring condition, in above-mentioned complex solution, drip the NaOH solution that concentration is 5mol / L, adjust solution pH value to near 7.3, the chitosan Cu that separates out 2+ The complex particles were filtered and washed to obtain chitosan Cu 2+ Complex particles; the above complex particles are dispersed in 300g deionized water, while add...
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