Preparation method of silver nano prism for improving capability of titanium dioxide in photocatalytic degradation of organic pollutants in wastewater
A technology of organic pollutants and titanium dioxide, applied in water pollutants, catalyst activation/preparation, oxidized water/sewage treatment, etc., can solve problems such as low photocatalytic efficiency
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Embodiment 1
[0010] (1) prepare the methylene blue solution of mass fraction 0.001%, the titanium dioxide solution of mass fraction 0.2%,
[0011] (2) Take 1mL of the silver nanoprism solution with a clean disposable plastic dropper, put it in a small transparent glass bottle, then add 1mL of titanium dioxide solution, oscillate and shake well, cover the bottle cap, and seal it with a parafilm , put them into a beaker filled with distilled water, put the beaker into an ultrasonic cleaner, and take it out after ultrasonic mixing for 30 minutes.
[0012] (3) Set No. bottle "1" of the blank control group without catalyst, add 4mL methylene blue solution, 2mL ultrapure water in the bottle; set No. "2" bottle of the control group without silver solution, add 4mL methylene blue solution, 1mL titanium dioxide in the bottle solution and 1mL of ultrapure water, the "3" bottle of the experimental group was taken out in (2), and then added 4mL of methylene blue solution, and stood in the dark for 1h ...
Embodiment 2
[0022] Other reaction parameters are consistent with the operation steps. Change the initial concentration of the methylene blue solution, expand the mass fraction by ten times, prepare a methylene blue solution with a mass fraction of 0.01%, or reduce it by ten times, prepare a methylene blue solution with a mass fraction of 0.0001%, and compare the initial concentration of the methylene blue solution. The influence of different concentrations on the photocatalytic efficiency of titanium dioxide modified with silver nanoprisms. In actual production, the concentration of organic matter in wastewater is either high or low. Photocatalysts have different photocatalytic effects on wastewater with different concentrations of organic matter. degradation effect.
Embodiment 3
[0024] Other reaction parameters are consistent with the operating steps, changing the mass fraction of titanium dioxide, the nano-titanium dioxide used in the photocatalytic experiment is commercial Degussa P25 titanium dioxide, which is a mixed phase of anatase crystal and rutile crystal with an average particle size of 25 nanometers Titanium dioxide is a nano-scale white powder, and the hydroxyl groups on the surface make it hydrophilic.
[0025] Double the mass fraction to prepare a titanium dioxide solution with a mass fraction of 0.4%, or double the size to prepare a titanium dioxide solution with a mass fraction of 0.1%. Compared with the different mass fractions of titanium dioxide, the impact on the photocatalytic efficiency of titanium dioxide modified by silver nanoprisms In actual production, different dosages of photocatalysts have different photodegradation effects on organic matter in wastewater.
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