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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 reaction, is not fully exerted and the insufficient utilization of the light source directly affects the The light utilization rate of titanium dioxide photocatalyst leads to low photocatalytic performance, so the degradation rate of pollutants is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 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, and 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. Wash and set aside. Using tetrabutyl titanate (170 g) as the titanium source, add sulfuric acid aqueous solution (500 mL) with a concentration of 1 wt %, and stir at 50 rpm for 2 h at 25° C. to form nano-titanium dioxide sol. Inject the nano-titanium dioxide sol prepared above into the prepared microchannel reactor channel at a rate of 10g / min, stay for 5min, and then inject deionized water into the microchannel reactor channel at a rate of 10g / min for cleaning to obtain nano-titanium dioxide Sol particle modified microchannel reactor. The nano-titanium dioxide sol particle-modified microchannel reactor prepared above was placed under a 500W infrared light source, 20 cm away from the light source, and ...

Embodiment 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, wash away the dirt, and finally clean it with deionized water. ,spare. Using tetraethyl titanate (228 g) as titanium source, nitric acid solution (1 L) with a concentration of 2 wt % was added, and stirred at 60 rpm for 4 h at 35° C. to form nano-titanium dioxide sol. Inject the nano-titanium dioxide sol prepared above into the prepared microchannel reactor channel at a rate of 30g / min, stay for 10min, and then inject deionized water into the microchannel reactor channel at a rate of 30g / min for cleaning to obtain nano-titanium dioxide Sol particle modified microchannel reactor. The nano-titanium dioxide sol particle-modified microchannel reactor prepared above was placed under a 500W infrared light source, 20 cm away from the light source, and illuminated for 2...

Embodiment 3

[0032] Prepare a glass microchannel reactor with a channel diameter of 2mm and a length of 60m. First, clean the channel dust with water, then inject a 5wt% NaOH aqueous solution into the channel at a rate of 50g / min, wash away the dirt, and finally clean it with deionized water. ,spare. Titanium tetrachloride (190 g) was used as a titanium source, ammonia water (800 mL) with a concentration of 3 wt % was added, and stirred at 80 rpm for 6 h at 40° C. to form a nano-titanium dioxide sol. Inject the nano-titanium dioxide sol prepared above into the prepared microchannel reactor channel at a rate of 50g / min, stay for 15min, and then inject deionized water into the microchannel reactor channel at a rate of 50g / min for cleaning to obtain nano-titanium dioxide Sol particle modified microchannel reactor. The nano-titanium dioxide sol particle-modified microchannel reactor prepared above was placed under a 1000W infrared light source, 30 cm away from the light source, and illuminate...

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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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