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Preparation method of micro-channel vertical-growth TiO2-clading ZnO nano rod array

A nanorod array and vertical growth technology, which is applied in the intersection of nanotechnology and microfluidic technology, can solve the problems of reducing the solid-liquid contact area between the catalyst and the reaction liquid, the separation and regeneration of nanocatalysts, and the widespread use of nanocatalysts. The effect of surface area

Inactive Publication Date: 2010-07-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows creation of tiny structures called zinc oxide (ZNO) nanosheets that can hold small molecules like water or oxygen inside them without being affected when they are introduced into another material's interior through channels made up from this modified microsystem. These modifications make it easier to handle these materials while still maintain their effectiveness at producing chemical transformations such as decomposition of organics.

Problems solved by technology

Technological Problem: Current methods for separating or recirculating nanospheres from liquid solutions require large areas of space, which limit its usefulness in small scale chemistry processes where they may occupy most part of volume. Therefore there has arisen an urgent technical challenge how to develop efficient ways to grow titanium oxide onto surfaces without compromising the desired properties like enhancing light absorption ability at certain wavelength ranges.

Method used

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  • Preparation method of micro-channel vertical-growth TiO2-clading ZnO nano rod array
  • Preparation method of micro-channel vertical-growth TiO2-clading ZnO nano rod array
  • Preparation method of micro-channel vertical-growth TiO2-clading ZnO nano rod array

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Embodiment 1

[0032] Preparation of Lotion I (V 浓硫酸 :V 双氧水 :V 蒸馏水 =4:1:20) and lotion II (V 氨水 :V 双氧水 :V 蒸馏水 =1:4:20). Soak the microchannel in lotion I at 110°C for 10 minutes, rinse it with deionized water, then soak the microchannel in lotion II at 70°C for 10 minutes, rinse it with deionized water, and dry it for later use. Prepare 0.01M ethanol solution of zinc acetate dihydrate, 0.04M ethanol solution of sodium hydroxide, 0.05M solution of zinc nitrate hexahydrate, and 0.05M solution of hexamethylenetetramine. Inhale the ethanol solution of zinc acetate dihydrate and the ethanol solution of sodium hydroxide into two 10mL syringes respectively, set the push speed of the microinjection pump at 25 μL / min, and deliver them simultaneously to the microchannel pre-placed in a 60°C oven. After the microchannel is filled, the transportation is stopped, and after 2 hours of reaction, the temperature of the oven is raised to 150°C for 1 hour for annealing. The microchannel is washed succe...

Embodiment 2

[0034] Preparation of Lotion I (V 浓硫酸 :V 双氧水 :V 蒸馏水 =4:1:20) and lotion II (V 氨水 :V 双氧水 :V 蒸馏水 =1:4:20). Soak the microchannel in lotion I at 110°C for 30 minutes, rinse with deionized water, then soak the microchannel in lotion II at 60°C for 30 minutes, rinse with deionized water, and dry for later use. Prepare 0.01M ethanol solution of zinc acetate dihydrate, 0.04M ethanol solution of sodium hydroxide, 0.025M solution of zinc nitrate hexahydrate, and 0.025M solution of hexamethylenetetramine. Inhale the ethanol solution of zinc acetate dihydrate and the ethanol solution of sodium hydroxide into two 10mL syringes respectively, set the push speed of the microinjection pump at 50 μL / min, and deliver them simultaneously to the microchannel pre-placed in an oven at 30°C. After the microchannel is filled, the transport is stopped, and after 1 hour of reaction, the temperature of the oven is raised to 180°C for 1 hour of annealing. The microchannel is washed successively wi...

Embodiment 3

[0036] Preparation of Lotion I (V 浓硫酸 :V 双氧水 :V 蒸馏水 =4:1:20) and lotion II (V 氨水 :V 双氧水 :V 蒸馏水 =1:4:20). Soak the microchannel in lotion I at 130°C for 10 minutes, rinse it with deionized water, then soak the microchannel in lotion II at 80°C for 10 minutes, rinse it with deionized water, and dry it for later use. Prepare 0.001M ethanol solution of zinc acetate dihydrate, 0.004M ethanol solution of sodium hydroxide, 1M solution of zinc nitrate hexahydrate, and 1M solution of hexamethylenetetramine. Inhale the ethanol solution of zinc acetate dihydrate and the ethanol solution of sodium hydroxide into two 10mL syringes respectively, set the push speed of the microinjection pump to 10 μL / min, and deliver them simultaneously to the microchannel pre-placed in an oven at 80°C. After the microchannel is filled, the transportation is stopped, and after 2 hours of reaction, the temperature of the oven is raised to 150°C for 2 hours for annealing. The microchannel is washed succ...

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Abstract

The invention relates to a preparation method of micro-channel vertical-growth TiO2-clading ZnO nano rod array, which comprises the following steps: capillary glass tube is adopted as a micro-channel, and firstly the micro-channel is cleaned; alcoholic solution of 0.001 to 0.01M zinc salt is prepared, alcoholic solution of .004 to 0.04M alkali is prepared, the alcoholic solution of zinc salt and alkali is simultaneously conveyed by a micro injection pump to a micro-channel of a drying box, and a layer of ZnO crystal film is obtained on the surface of the micro-channel; then a zinc salt solution of 0.025 to 2M is prepared, ammonia solution of 0.025 to 2M is prepared, and the zinc salt solution and the ammonia solution are simultaneously conveyed into the drying box, and the vertically-grown ZnO nano rod array is prepared in the micro-channel with the inner surface being prefabricated with ZnO crystal; and finally TiO2 sol with the concentration of 2 to 5 mg/mL and the pH value of 3.8 to 4.2 is convyed into the micro-channel with the vertically-grown ZnO nano rod array, and the vertically-grown TiO2-cladding ZnO nano rod array is obtained on the inner surface of the micro-channel.

Description

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Claims

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Application Information

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Owner DONGHUA UNIV
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