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Titanium dioxide film for photocatalyst and preparation method thereof

A technology of titanium dioxide and photocatalyst, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of complex preparation process and inability to realize practical application, and achieve simple preparation process, low cost, The effect of long service life

Active Publication Date: 2017-06-20
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it has not yet been practically realized, and there is still room for improvement.
Subsequently, it was reported that noble metal Pd was loaded onto TiO by low-temperature electrostatic adsorption. 2 Nano-membrane (Chemical Engineering Journal, 2014, 252, 337-345), to improve its catalytic performance, but the preparation process is relatively complicated

Method used

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  • Titanium dioxide film for photocatalyst and preparation method thereof
  • Titanium dioxide film for photocatalyst and preparation method thereof
  • Titanium dioxide film for photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The titanium sheet (manufactured by Baoji Shengrong Titanium Corporation, purity 99.5%, 240mm×100mm×0.15mm) was ultrasonically cleaned in ethanol to remove organic matter on the surface. Then put the cleaned titanium flakes into a boiling oxalic acid aqueous solution for pretreatment for 0.5 h for etching, and then clean with deionized water and dry. After that, provide a mixed solution of 200 mL of pure water and 200 mL of isopropanol, and then add an aqueous hydrogen fluoride solution to it to make a 0.02 mol / L hydrogen fluoride mixed solution. The total volume of the mixed solution is 400 ml, and then put the titanium sheet and the hydrogen fluoride mixed solution Put it into a 500ml polytetrafluoroethylene reactor, the titanium piece is completely immersed in the hydrogen fluoride mixed solution, hydrothermally reacted at 170℃ for 2h, when the temperature in the reactor returns to room temperature, take out the titanium piece and use it Rinse with ionized water, then...

Embodiment 2

[0045] The titanium sheet (manufactured by Baoji Shengrong Titanium Corporation, purity 99.5%, 240mm×100mm×0.15mm) was ultrasonically cleaned in ethanol to remove organic matter on the surface. The cleaned titanium flakes were put into boiling oxalic acid aqueous solution for pretreatment for 1.5 hours for etching, and then washed with deionized water and dried. After that, provide a mixed solution of 125 mL of pure water and 275 mL of isopropanol, and then add an aqueous hydrogen fluoride solution to it to make a 0.03 mol / L hydrogen fluoride mixed solution, the total volume of the mixed solution is 400 ml, and then put the titanium sheet and the hydrogen fluoride mixed solution Put it into a 500ml polytetrafluoroethylene reactor, the titanium piece is completely immersed in the hydrogen fluoride mixed solution, hydrothermally reacted at 180℃ for 3h, when the temperature in the reactor returns to room temperature, take out the titanium piece and use it Simply rinse with ionized...

Embodiment 3

[0050] The titanium sheet (manufactured by Baoji Shengrong Titanium Corporation, purity 99.5%, 240mm×100mm×0.15mm) was ultrasonically cleaned in ethanol to remove organic matter on the surface. The cleaned titanium flakes were put into boiling oxalic acid aqueous solution for pretreatment for 1.5 hours for etching, and then washed with deionized water and dried. After that, provide a mixed solution of 125 mL of pure water and 275 mL of isopropanol, and then add an aqueous hydrogen fluoride solution to it to make a 0.05 mol / L hydrogen fluoride mixed solution, the total volume of the mixed solution is 400 ml, and then put the titanium sheet and the hydrogen fluoride mixed solution Put it into a 500ml polytetrafluoroethylene reactor, the titanium piece is completely immersed in the hydrogen fluoride mixed solution, hydrothermally reacted at 180℃ for 3h, when the temperature in the reactor returns to room temperature, take out the titanium piece and use it Simply rinse with ionized...

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Abstract

The invention provides a method for preparing a titanium dioxide film for photocatalyst, comprising the following steps: providing a titanium metal substrate, and cleaning and removing the dirt attached to the surface of the titanium metal substrate; putting the cleaned titanium metal substrate into boiling oxalic acid Etching treatment in aqueous solution to properly roughen its surface; put the etched titanium metal substrate into a hydrothermal tank filled with a mixed solution of water, isopropanol and hydrofluoric acid, and heat it at 170°C~190°C after sealing Under hydrothermal reaction: the titanium metal substrate obtained through the hydrothermal reaction is washed with water, and then fired at 300°C to 900°C to obtain a titanium dioxide film for photocatalyst. The present invention also provides a titanium dioxide film for photocatalyst, which has a rectangular crystal plane, and the rectangular crystal plane has a plurality of holes. The titanium dioxide film for catalyst of the invention has long service life, high exposure rate of {001} crystal plane and holes, simple preparation method and low cost.

Description

Technical field [0001] The invention relates to a titanium dioxide film for photocatalyst and a preparation method thereof. Background technique [0002] Titanium dioxide is a kind of semiconductor oxide with stable chemical properties and low cost. It has been widely used in photocatalysis, photovoltaic cells, sensors and other fields. In the past 20 years, sol-gel method, hydrothermal method, solvothermal method, chemical vapor deposition, anodic oxidation method have been applied to try to prepare different nanostructured TiO 2 Materials, research and preparation of titanium dioxide with high photocatalytic activity is a hot spot in recent decades. [0003] Research shows that anatase TiO 2 The surface energy of {001}, {100} and {101} are 0.90J / m respectively 2 , 0.53J / m 2 , 0.44J / m 2 , {001} crystal plane with higher surface energy has higher photocatalytic activity. However, the usually prepared anatase TiO 2 The material mainly shows {101} faces. In 2008, some researchers s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06
Inventor 张彭义郑红徐同舟关口裕实子
Owner TSINGHUA UNIV
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