Phosphor doping type nano titanium dioxide having efficient sunlight catalytic capability and preparation method thereof
A nano-titanium dioxide, catalytic performance technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of poor photocatalytic activity of nitrogen-doped titanium dioxide, and achieve the effect of increasing the phase transition temperature
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[0032] In Example 1, tetrabutyl titanate was used as the titanium source and phosphoric acid was used as the phosphorus source, and P-doped titanium dioxide nanoparticles were prepared at room temperature.
[0033] In molar ratio [H 3 PO 4 ] / [Ti(OC 4 H 9 ) 4 ] = 0.044 / 1 sampling, a typical preparation method is to first take 20mL anhydrous C 2 H 5 OH in a 50mL Erlenmeyer flask, add 4mL Ti(OC 4 H 9 ) 4 , Then add 4mL ice CH 3 COOH, stir and mix with a magnetic stirrer, the solution obtained is A solution; another 20mL conical flask, measure 20mL anhydrous C 2 H 5 Put OH in an Erlenmeyer flask, then measure 5mL of HCl aqueous solution with pH 2 in the Erlenmeyer flask, then add 30μL of analytical pure H 3 PO 4 , The solution obtained by shaking and mixing is liquid B; transfer liquid B into the dropping funnel and slowly drop it into liquid A, keep magnetic stirring, and the dripping is completed in about 2 hours, and a stable transparent sol is obtained, and then the sol is obtained ...
Example Embodiment
[0034] Example 2 Catalytic degradation of rhodamine B by P-doped samples calcined at different temperatures under sunlight
[0035] Weigh 5mg of P-doped samples calcined at different temperatures (400℃, 500℃, 600℃, 700℃, 800℃) into 5 quartz cups, and then add 25mL of 0.01g / L rhodamine B solution to avoid After 15 minutes of optical ultrasound, 5 quartz cups were exposed to outdoor sunlight for 30 minutes at the same time, and 3 mL of the degraded turbid liquid was taken out of the 5 quartz cups, centrifuged, and the supernatant was taken to measure the absorbance A value at the peak position of 553nm. According to the formula D%=(1-A t / A 0 )×100 to calculate the decolorization rate.
Example Embodiment
[0036] Example 3 Different types of titanium dioxide degrade rhodamine B under sunlight
[0037] Weigh 5mg of undoped titanium dioxide, P-doped titanium dioxide, and P25 into the same quartz cup, and then add 25mL of 0.01g / L rhodamine B solution into 3 quartz cups, and take another one after 15 minutes of ultrasound in the dark Add the same concentration of rhodamine B solution to the same quartz cup, put the four quartz cups under outdoor sunlight for 40 minutes, take samples every 10 minutes, centrifuge, take the supernatant liquid to test the absorption spectrum, sample four times and stop the light , Read the absorption A value at 553nm peak position, according to the formula D% = (1-A t / A 0 )×100 Calculate the decolorization rate and get Figure 5 .
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