TiO2 nano-array film and preparation method thereof

A nano-array and thin-film technology, applied in the field of photocatalysis, can solve the problems of complex preparation process, long preparation period, and large solvent pollution, and achieve the effect of simple and controllable preparation process.

Inactive Publication Date: 2019-04-23
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, methods such as liquid phase chemical method and sol-gel method are mostly used to prepare TiO 2 Thin film, its preparation process is relatively complicated, the preparation cycle is long, and there are disadvantages such as high cost of raw materials, large pollution of solvents used, etc.

Method used

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  • TiO2 nano-array film and preparation method thereof
  • TiO2 nano-array film and preparation method thereof

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preparation example Construction

[0034] A kind of TiO 2 A method for preparing a nano-array film, comprising the following steps:

[0035] Step 1: Put 20×20mm 2 Titanium foils of large and small areas were ultrasonically cleaned in 99.7 wt% ethanol and deionized water for 15 minutes, and then placed in 40wt% HF, 65-68wt% HNO 3 and H 2 Mixed acid solution of O (the volume ratio is HF:HNO 3 :H 2 O=1:1:2) Immerse for 15-20s to remove the oxide layer on the surface of the titanium foil to obtain a new titanium surface. After taking it out, rinse it repeatedly with deionized water, and then put the titanium foil into deionized water for ultrasonic cleaning for 10- After 15 minutes, the mixed acid solution was completely removed to obtain a cleaned titanium foil;

[0036] Step 2: Put the cleaned titanium foil in Step 1 into an oven and dry it at 60-80°C for 1-2 hours, then put it into an 80mL reaction kettle;

[0037] Step 3: Add 50mL 2mol / L NaCl solution to 10mL 30wt% H 2 o 2 , stirred for 30min to obtain ...

Embodiment 1

[0042] 20×20mm 2 Titanium foils of different sizes were ultrasonically cleaned in 99.7wt% ethanol and deionized water for 15 minutes respectively; then cleaned with 40wt% HF and 65wt% HNO 3 and H 2 Mixed acid solution of O (the volume ratio is HF:HNO 3:H 2 O=1:1:2) soak for 20s, take it out and rinse it repeatedly with deionized water, then put the titanium foil in deionized water and ultrasonically clean it for 10 minutes to get the cleaned titanium foil; put the cleaned titanium foil in the oven After drying at 70°C for 2 hours, put it into an 80mL reaction kettle; add 5.844g NaCl into deionized water, stir until completely dissolved, and prepare a 50mL NaCl solution with a concentration of 2mol / L; add 10mL of 30wt% H 2 o 2 Add it to the above NaCl solution, stir for 30 minutes until completely dissolved to obtain a mixed solution; transfer the mixed solution to an 80mL reactor, and conduct a hydrothermal reaction at 140°C for 4 hours; after the reactor is cooled to room...

Embodiment 2

[0048] 20×20mm 2 Titanium foils of different sizes were ultrasonically cleaned in 99.7wt% ethanol and deionized water for 15 minutes respectively; then cleaned with 40wt% HF and 68wt% HNO 3 and H 2 Mixed acid solution of O (the volume ratio is HF:HNO 3 :H 2 O=1:1:2) Immerse for 15s, take it out and rinse it repeatedly with deionized water, then put the titanium foil in deionized water and ultrasonically clean it for 15 minutes to get the cleaned titanium foil; put the cleaned titanium foil in the oven After drying at 60°C for 1 hour, put it into an 80mL reaction kettle; add 5.844g NaCl into deionized water, stir until completely dissolved, and prepare a 50mL NaCl solution with a concentration of 2mol / L; add 10mL of 30wt% H 2 o 2 Add it to the above NaCl solution, stir for 30 minutes until it is completely dissolved to obtain a mixed solution; transfer the mixed solution to an 80mL reactor, and conduct a hydrothermal reaction at 140°C for 6 hours; after the reactor is coole...

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Abstract

The invention provides a TiO2 nano-array film and a preparation method thereof. The preparation method includes the following steps: putting a chemically polished metal titanium foil (20*20mm<2>) intoan 80mL reaction kettle; adding sodium chloride (NaCl) into deionized water, stirring the deionized water until the sodium chloride is completely dissolved, adding hydrogen peroxide (H2O2), and continuing to stir for 30 minutes; transferring the mixed solution into the reaction kettle, and performing hydrothermal reaction at 140 DEG C for 6 hours; taking out the titanium foil after the reaction kettle is cooled to room temperature, flushing the surface of the titanium foil by the deionized water, and drying the titanium foil in an oven; subjecting the dried titanium foil to heat treatment ina muffle furnace at 450 DEG C for 2 hours to obtain the TiO2 nano-array film. The surface of the prepared TiO2 nano-array film is composed of nano-sheets perpendicular to a substrate, and the preparation process is simple and easy to control.

Description

technical field [0001] The present invention is a TiO 2 A nano-array film and a preparation method thereof belong to the technical field of photocatalysis. Background technique [0002] TiO 2 Due to its excellent safety, catalytic performance and stability, thin films have been widely studied in the fields of photocatalytic treatment of sewage and air purification. The photogenerated electrons and holes under simple photocatalytic conditions are easy to recombine, and the activity is low. By external forward bias, the separation efficiency of photogenerated electrons and holes can be significantly improved, so photoelectric synergistic catalysis can significantly increase the degradation rate of organic pollutants. The structure of photocatalytic thin film electrodes is very important to the photoelectric synergistic effect, and the electrode structure and charge transport properties determine the effect of photocatalysis. An ideal photoelectrocatalytic photoanode should...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G23/047C01P2004/20C01P2004/50C01P2004/64
Inventor 鄂磊赖柳媛赵丹赵巍李天昊
Owner TIANJIN CHENGJIAN UNIV
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