Preparation method of nano-titanium dioxide modified microchannel 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, Problems such as low photocatalytic performance, to achieve the effect of promoting degradation rate and efficiency, high channel density, and large contact area
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Embodiment 1
[0028] 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
[0032] 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
[0036] 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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