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Preparation of quartz tube carried nanometer titanium dioxide film at its surface and use thereof

A nano-titanium dioxide, quartz tube technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems affecting the use of quartz tubes, etc., and achieve little change in sterilization rate and increase in sterilization rate. Effect

Inactive Publication Date: 2008-12-31
王显祥 +2
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AI Technical Summary

Problems solved by technology

Quartz tubes without special surface treatment are all transparent. Because the surface contains a certain amount of hydroxyl groups, they are hydrophilic, and water droplets and dust are easy to accumulate on the surface, which affects the use of quartz tubes.

Method used

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  • Preparation of quartz tube carried nanometer titanium dioxide film at its surface and use thereof

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Embodiment Construction

[0014] (1) TiO 2 Sol and TiO 2 and Fe(OH) 3 Preparation of mixed sols

[0015] Add 10ml of n-butyl titanate (analytically pure) into a beaker filled with 200ml of absolute ethanol, place it on a constant temperature (temperature 35-45°C) magnetic stirrer and stir at a low speed, and above the beaker is filled with 0.5mol / L nitric acid (HNO 3 ) acid burette, add 100ml drop by drop, you can get light blue TiO 2 Sol.

[0016] Add 100g of ferric chloride (FeCl 3 ), FeCl 3 Hydrolysis produces reddish-brown Fe(OH) 3 After the colloid was naturally cooled in the air, the precipitate was removed by filtration to obtain a pure reddish-brown colloid. By TiO 2 Sol and Fe(OH) 3 The sols are mixed in different volume ratios, such as 3:1, to obtain mixed sols.

[0017] (2) Coating nano-film or TiO doped with iron oxide on the outer surface of the quartz tube 2 film

[0018] Wash the quartz tube (300mm in length, 20mm in diameter) repeatedly with detergent and distilled water, so...

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Abstract

The invention relates to a new method for loading TiO2 film or the TiO2 film doped with Ag+, Cu2+, Co2+ and iron oxide on the inner surface or the outer surface of a quartz tube. The method comprises the following steps: firstly, preparing TiO2 sol of different concentrations by n-butyl titanate through hydrolysis; secondly, evenly coating the TiO2 sol on the outer surface or the inner surface of the quartz tube through the czochralski method or the impregnation method; then putting the quartz tube into a muffle furnace for calcining so as to get the quartz tube with even surface coating. By controlling the sol composition and the coating thickness, the quartz tubes which are provided with significant hydrophobic effect and high weatherability and vary from colorless to purple and golden yellow can be obtained. The method can be applied to a variety of industrial quartz tubes for surface modification and coloring and can make use of the excellent photocatalytic properties of nano-TiO2 for air purification and sewage sterilization.

Description

technical field [0001] The invention relates to coating nano-TiO on the outer surface or inner surface of a quartz tube by means of a spin pulling method or an impregnation method 2 film or doped Ag + , Cu 2+ ,Co 2+ and iron oxide TiO 2 A new membrane method is used for surface treatment and function expansion of quartz tubes, belonging to the field of chemical engineering. Background technique [0002] The main component of the quartz tube is SiO 2 , due to its stable emissivity, no deformation at high temperature, no harmful radiation, high temperature resistance, high corrosion resistance, good chemical stability, small thermal inertia, fast thermal response, high thermal conversion efficiency, and can also transmit 190~ Ultraviolet rays with a wavelength of 320nm, quartz tubes are widely used in medical equipment, water treatment, food hygiene and sterilization, and far-infrared heating elements. The quartz tube without special surface treatment is transparent in c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/23B01J21/06
Inventor 王显祥何娟苟慧詹学梅黄晓
Owner 王显祥
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