A superhydrophobic self-cleaning surface with photocatalytic activity and self-repairing function and its preparation method
A self-cleaning, super-hydrophobic technology, applied in chemical instruments and methods, light-resistant fibers, water treatment of special compounds, etc., can solve the problems of damage to substrate materials and surface hydrophobic properties, difficulty in multi-functional integration, loss of surface hydrophobic properties, etc. , to achieve excellent hydrophobic performance, excellent durability, and the effect of increasing the force
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Embodiment 1
[0061] Example 1: Preparation of composite cotton with NDM-Ag@PDA-Ag@CdS surface
[0062] This example provides a superhydrophobic self-cleaning surface with photocatalytic activity, in which the heterojunction photocatalyst is Ag@PDA-Ag@CdS grafted cotton fabric, and the hydrophobic group is dodecyl mercaptan (NDM), The solvent is ethanol. Concrete preparation method comprises the following steps:
[0063] 1. Preparation of silver-modified heterojunction photocatalyst:
[0064] (1) Weigh 0.6056g of Tris-base, 2g of dopamine hydrochloride, 0.1248g of copper sulfate pentahydrate and 60μL of hydrogen peroxide, add water to obtain 100mL of Tris-HCl buffer solution with a pH of 8.5, place the base The polydopamine was deposited on the surface of the substrate by immersing and reacting in the buffer solution for 4 hours.
[0065] (2) Weigh 0.1211g of Tris-base and 0.0606g of L-cysteine, add water to obtain 100mL of Tris-HCl buffer solution with a pH of 8.0, place the substrate t...
Embodiment 2
[0070] Example 2: Preparation of composite cotton with 1H, 1H, 2H, 2H-perfluorodecanethiol-Ag@PDA-Ag@CdS surface
[0071] This example provides a photocatalytically active superhydrophobic self-cleaning surface, in which the heterojunction photocatalyst is Ag@PDA-Ag@CdS grafted cotton fabric, and the hydrophobic groups are 1H, 1H, 2H, 2H-perfluoro Decanethiol, the solvent is ethanol. Concrete preparation method comprises the following steps:
[0072] 1. Preparation of silver-modified heterojunction photocatalysts
[0073] (1) Weigh 0.6056g of Tris-base, 2g of dopamine hydrochloride, 0.1248g of copper sulfate pentahydrate and 60μL of hydrogen peroxide, add water to obtain 100mL of Tris-HCl buffer solution with a pH of 8.5, place the base The polydopamine was deposited on the surface of the substrate by immersing and reacting in the buffer solution for 4 hours.
[0074] (2) Weigh 0.1211g of Tris-base and 0.0606g of L-cysteine, add water to obtain 100mL of Tris-HCl buffer solu...
Embodiment 3
[0079] Example 3: Preparation of composite cotton with 1H, 1H, 2H, 2H-perfluorodecanethiol-Ag@PDA-ZnS surface
[0080] This example provides a photocatalytically active superhydrophobic self-cleaning surface, in which the heterojunction photocatalyst is Ag@PDA-ZnS grafted cotton fabric, and the hydrophobic group is 1H, 1H, 2H, 2H-perfluorodecylsulfide Alcohol, the solvent is ethanol. Concrete preparation method comprises the following steps:
[0081] 1. Preparation of heterojunction photocatalyst:
[0082] (1) Weigh 0.6056g of Tris-base, 2g of dopamine hydrochloride, 0.1248g of copper sulfate pentahydrate and 60μL of hydrogen peroxide, add water to obtain 100mL of Tris-HCl buffer solution with a pH of 8.5, place the base The polydopamine was deposited on the surface of the substrate by immersing and reacting in the buffer solution for 4 hours.
[0083] (2) Weigh 0.1211g of Tris-base and 0.0606g of L-cysteine, add water to obtain 100mL of Tris-HCl buffer solution with a pH o...
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