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Immobilized titanium dioxide nanowires on substrate and method for fabricating the same and water treatment method using the immobilized titanium dioxide nanowires on substrate

A technology of titanium dioxide and manufacturing methods, applied in the direction of titanium oxide/hydroxide, titanium dioxide, chemical instruments and methods, etc., can solve the problems of nanoporous surface pollution, non-continuous operation, etc.

Active Publication Date: 2013-03-06
KOREA INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In Korean Patent No. 886906, a titanium separation membrane with a nanoporous titanium dioxide surface and its manufacturing method are proposed, but its disadvantage is that fouling on the nanoporous surface makes it impossible to operate continuously and requires regular cleaning

Method used

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  • Immobilized titanium dioxide nanowires on substrate and method for fabricating the same and water treatment method using the immobilized titanium dioxide nanowires on substrate
  • Immobilized titanium dioxide nanowires on substrate and method for fabricating the same and water treatment method using the immobilized titanium dioxide nanowires on substrate
  • Immobilized titanium dioxide nanowires on substrate and method for fabricating the same and water treatment method using the immobilized titanium dioxide nanowires on substrate

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Example 1 Manufacture and Characteristic Analysis of Titanium Dioxide Nanowires Fixed on Substrate

[0044] Mix 4 ml of glacial acetic acid, 14 ml of ethanol, 1 g of polymer binder PVP to adjust viscosity, and 2 g of titanium dioxide precursor TTIP, and stir at 50° C. for 30 minutes to prepare a precursor mixed solution.

[0045] After forming a 100nm titanium film on a quartz substrate by an electron beam evaporation machine, 2 ml of the precursor solution was electrosprayed at a speed of 50 μm / min to plate titanium dioxide nanowires on the substrate. Then, the substrate was pressed by a punch press at a temperature of 120° C. and a pressure of 15 MPa for 10 minutes to perform hot pressing treatment to fix the titanium dioxide nanowires on the substrate.

[0046] image 3 Each shows that when manufacturing substrate-fixed titanium dioxide nanowires, post-heat treatment is performed directly without hot pressing ( image 3 (A)) and the sample subjected to autoclave treatment a...

Embodiment 2

[0049] Example 2 Analysis of photocatalytic activity according to crystal form ratio

[0050] The decomposition efficiency of the organic pollutants of the substrate-immobilized titanium dioxide nanowires manufactured in Example 1 was observed. Image 6 It is a graph showing the change in the photocatalytic decomposition rate of ranitidine caused by the temperature change of the post-heat treatment. The quartz substrate used in the experiment is 2cm in length and width, and ranitidine is an organic pollutant. Moreover, the initial concentration of ranitidine was 100 µM, and the light source used for the photolysis experiment was a 4W BLB lamp (emission wavelength: 350 to 400 nm, Philips Co.).

[0051] reference Image 6 It can be seen that the photocatalytic decomposition effect of ranitidine is best when post-heat treatment at 600°C, and the decomposition rate is different at different post-heat treatment temperatures. As observed before, it can be confirmed that the post-heat tr...

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Abstract

The invention provides a substrate fixing titanium dioxide nano-wires, a method for manufacturing the same, and a water treating method using the same. The method for manufacturing a substrate fixing titanium dioxide nano-wires includes the following steps: the titanium dioxide are fixed on the substrate through a thermal compressing operation and need no separation and recycling in water treating processes; the titanium dioxide crystal phase ratios of the titanium dioxide are adjusted to obtain a maximum of photocatalytic activity.

Description

Technical field [0001] The invention relates to a substrate-fixed titanium dioxide nanowire and a manufacturing method thereof, and a water treatment method using the substrate-fixed titanium dioxide nanowire. Specifically related to the electrospray method and hot pressing method to fix the titanium dioxide on the substrate, so that the titanium dioxide does not need to be separated and recovered during water treatment, and at the same time, the titanium dioxide crystal form ratio can be adjusted to the best ratio, so that the photocatalytic activity can reach the maximum A substrate-fixed titanium dioxide nanowire and a manufacturing method thereof, and a water treatment method using the substrate-fixed titanium dioxide nanowire. Background technique [0002] Photocatalyst is a substance that causes a catalytic reaction under light (300~400nm) irradiation. The photocatalytic reaction is derived from the formation of electron pairs by semiconductors by absorbing band gap energy ...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J21/08B01J35/02C01G23/053C02F1/30C02F1/32
CPCB82Y40/00C01G23/047C25D9/04
Inventor 洪锡垣崔炅镇李相协李在祥崔时爀权初荣金熙燦
Owner KOREA INST OF SCI & TECH
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