Preparation method for nano-TiO2 modified micro-channel reactor

A technology of microchannel reactor and nano-titanium dioxide, which is applied in the chemical/physical/physicochemical process of energy application, light water/sewage treatment, etc., can solve the problem of affecting the light utilization rate of titanium dioxide photocatalyst, the degradation rate of pollutants is not high, Insufficient use of light sources and other issues to achieve the effect of promoting degradation rate and efficiency, high channel density, and large contact area

Active Publication Date: 2015-09-30
QUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the titanium dioxide photocatalytic technology is still in the stage of laboratory and theoretical exploration, mainly because the catalytic activity of the titanium dioxide photocatalytic reactor, which is the main equipment of the photocatalytic

Method used

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Examples

Experimental program
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Example Embodiment

[0023] Example 1

[0024] Prepare a glass microchannel reactor with a channel diameter of 0.1mm and a length of 20m. First, clean the channel dust with water, then inject a 1wt% NaOH aqueous solution into the channel at a rate of 10g / min to wash away the dirt, and finally use deionized water Clean and spare. Using tetrabutyl titanate (170 g) as a titanium source, adding a 1 wt% sulfuric acid aqueous solution (500 mL) with a concentration of 1 wt%, and stirring at 50 rpm for 2 hours at 25° C. to form a nano-titanium dioxide sol. The prepared nano-titania sol was injected into the prepared micro-channel reactor channel at a rate of 10 g / min, stayed for 5 minutes, and then deionized water was injected into the micro-channel reactor channel at a rate of 10 g / min for cleaning, to obtain nano-titania Microchannel reactor modified by sol particles. The microchannel reactor modified with nanometer titania sol particles prepared above was placed under a 500W infrared light source, 20 cm...

Example Embodiment

[0027] Example 2

[0028] Prepare a glass microchannel reactor with a channel diameter of 1mm and a length of 40m. First, clean the channel dust with water, then inject a 3wt% NaOH aqueous solution into the channel at a rate of 25g / min to wash away the dirt, and finally clean with deionized water ,spare. Using tetraethyl titanate (228g) as the titanium source, adding a 2wt% nitric acid solution (1L), stirring at 60rpm for 4h at 35°C, to form a nanometer titanium dioxide sol. The prepared nano-titania sol was injected into the prepared micro-channel reactor channel at a rate of 30 g / min, stayed for 10 minutes, and then deionized water was injected into the micro-channel reactor channel at a rate of 30 g / min for cleaning, to obtain nano-titania Microchannel reactor modified by sol particles. The microchannel reactor modified with nano-TiO2 sol particles prepared above is placed under a 500W infrared light source, 20 cm away from the light source, and irradiated for 20 minutes. T...

Example Embodiment

[0031] Example 3

[0032] Prepare a glass microchannel reactor with a channel diameter of 2mm and a length of 60m. First, wash the channel dust with water, then inject a 5wt% NaOH aqueous solution into the channel at a rate of 50g / min to wash away the dirt, and finally clean with deionized water ,spare. Using titanium tetrachloride (190g) as a titanium source, adding ammonia water (800mL) with a concentration of 3wt%, stirring at 80 rpm for 6 hours at 40°C to form a nano titanium dioxide sol. The above-prepared nano titania sol was injected into the prepared microchannel reactor channel at a rate of 50g / min, stayed for 15min, and then deionized water was injected into the microchannel reactor channel at a rate of 50g / min for cleaning, to obtain nanometer titania Microchannel reactor modified by sol particles. The microchannel reactor modified with nanometer titanium dioxide sol particles prepared above is placed under a 1000W infrared light source, 30 cm away from the light sou...

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Abstract

The invention provides a preparation method for a nano-TiO2 modified micro-channel reactor. The preparation method comprises the following steps: preparing a micro-channel reactor made of a transparent material, and cleaning the micro-channel reactor for later use; adding a titanium source in an acidic water solution or ammonia water to obtain a mixture, and stirring the mixture to form nano-TiO2 sol; injecting the nano-TiO2 sol in a channel of the later-use micro-channel reactor, staying for 5-30 min, and injecting deionized water in the channel of the micro-channel reactor for cleaning to obtain a nano-TiO2 sol particle modified micro-channel reactor; placing the nano-TiO2 sol particle modified micro-channel reactor in a 500-1,000 W infrared source to be illuminated, ultrasonically cleaning the passage with an acidic cleaning solution and deionized water in sequence, and obtaining the nano-TiO2 modified micro-channel reactor. The preparation method has the characteristics of being simple in preparation process, and easy to achieve industrial production; the micro-channel reactor, prepared according to the preparation method, has the characteristics of being high in density, convenient and high in efficiency.

Description

(1) Technical field [0001] The invention relates to a preparation method of a nano-titanium dioxide-modified microchannel reactor, which can be used for photocatalytic sewage treatment, and belongs to the fields of inorganic material coating, microchannel reactor design and water treatment. (2) Background technology [0002] Due to its stable chemical properties, non-toxicity, good biocompatibility, excellent photoelectric and photocatalytic properties, and abundant resources, titanium dioxide has become the most potential photocatalytic material and has become a new research hotspot in sewage treatment. . However, the titanium dioxide photocatalytic technology is still in the stage of laboratory and theoretical exploration, mainly because the catalyst activity of the titanium dioxide photocatalytic reactor, which is the main equipment of the photocatalytic reaction, is not fully exerted, and the insufficient utilization of the light source directly affects the The light ut...

Claims

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Application Information

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IPC IPC(8): B01J19/12C02F1/30
Inventor 刘佳吴鸿健姜华陈丽群
Owner QUZHOU UNIV
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