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Process for preparing nano structured titanium dioxide photocatalyst coating

A titanium dioxide and nanostructure technology, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of harsh process conditions, complex equipment, high cost, simplify the preparation process, promote application and reduce manufacturing. cost effect

Inactive Publication Date: 2003-10-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, these methods still have the disadvantages of harsh process conditions, complicated equipment, large investment, and high cost.

Method used

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  • Process for preparing nano structured titanium dioxide photocatalyst coating
  • Process for preparing nano structured titanium dioxide photocatalyst coating
  • Process for preparing nano structured titanium dioxide photocatalyst coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: see figure 1 . figure 1 It is a schematic diagram of a liquid flame spraying system for implementing the present invention. The spray gun is an axial liquid-feeding flame spray gun. Propane is used as the gas, the pressure is 0.1MPa, and the flow rate is 7.34L / min; oxygen is used as the atomizing gas and supporting gas, the pressure is 0.5, 0.3MPa, and the flow rate is 42.9, 42.0L / min; the liquid uses butyl titanate Anhydrous ethanol solution with a concentration of 20%. When spraying the coating, the spraying distance is 150mm.

Embodiment 2

[0030] Example 2: see figure 2 . figure 2 It is a schematic diagram of a liquid plasma spraying system for implementing the present invention. The spray gun is a plasma spray gun, and the liquid atomizing nozzle atomizes the liquid into fine droplets. Argon pressure is 0.8MPa, flow rate is 77.5L / min; hydrogen pressure is 0.5MPa, flow rate is 4.23L / min; current is 400A, voltage is 50V. When spraying the coating, the spraying distance is 80mm. The liquid is an ethanol solution of butyl titanate with a concentration of 10%.

Embodiment 3

[0031] Embodiment 3: see image 3 . According to the traditional thinking, the heat source of the spraying system is a heat source in the form of flame, electric arc, plasma, etc., which is a specially applied heat source. Although the combustible components in the liquid raw material burn in the flame flow, they are not used as a heat source, but a an incidental phenomenon. image 3 In the liquid thermal spraying system shown, the raw material liquid is directly used as both the fuel and the spraying raw material, and this embodiment is simpler. The liquid is atomized into fine droplets through the atomizing nozzle, and the flammable components in the liquid are burned under the action of the gas-supporting oxygen to provide the energy necessary for spraying, and the solute in the liquid is heated, and the solute in the liquid is heated under the action of heat change, become titanium dioxide, and deposit on the substrate to form the nanostructure titanium dioxide photocata...

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Abstract

The present invention uses organic salt containing titanium, inorganic salt, nano powder and nano amorphous titanium compound as raw material, and adopts liquid thermal spraying process to prepare TiO2 photocatalysis coating layer with nano structure on the base body. Said TiO2 coating layer has the excellent photocatalysis property, and its preparation process is simple and its production cost is low. In the liquid thermal spraying process the temp. of the base body can be controlled below 100 deg.C and it has no any undesirable affect to performance of said base body, said invention can be extensively used in the fields of chemical engineering environment and material processing technology.

Description

1. Technical field [0001] The invention relates to a method for preparing a coating in the fields of chemical industry, environment and material processing, in particular to a method for preparing a nanostructure titanium dioxide coating by a liquid spraying method. 2. Background technology [0002] Compared with ordinary titanium dioxide, nanostructured titanium dioxide has significantly improved and enhanced properties in terms of light, electricity, and chemical catalysis. Therefore, nanostructured titanium dioxide has broad application prospects in the fields of industry, civil use, and environmental protection. [0003] The existing nanostructured titanium dioxide powder preparation methods include vapor phase deposition, sol-gel method, spray pyrolysis method, nano powder sintering method and so on. The spray pyrolysis method needs a large-volume closed high-temperature chamber, and the vapor deposition method has strict requirements on the pressure, gas composition a...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/00
Inventor 李长久杨冠军
Owner XI AN JIAOTONG UNIV
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