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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

Inactive Publication Date: 2010-04-07
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under sunlight irradiation, the photocatalytic activity of nitrogen-doped titania is not as good as that of P25

Method used

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  • Phosphor doping type nano titanium dioxide having efficient sunlight catalytic capability and preparation method thereof
  • Phosphor doping type nano titanium dioxide having efficient sunlight catalytic capability and preparation method thereof
  • Phosphor doping type nano titanium dioxide having efficient sunlight catalytic capability and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Example 1 Using tetrabutyl titanate as the titanium source and phosphoric acid as the phosphorus source, 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 take 20mL of anhydrous C 2 h 5 OH in a 50mL Erlenmeyer flask, add 4mL Ti(OC 4 h 9 ) 4 , then add 4 mL ice CH 3 COOH, stir and mix with a magnetic stirrer, the obtained solution is A solution; take another 20mL Erlenmeyer flask, measure 20mL of anhydrous C 2 h 5 OH in the conical flask, then measure 5mL of HCl aqueous solution with a pH value of 2 in the conical flask, then add 30μL of analytically pure H 3 PO 4 , the solution obtained by oscillating and mixing is B solution; transfer B solution into the dropping funnel and slowly drop it into A solution, keep magnetic stirring, and drop it for about 2 hours to obtain a stable transparent sol, and then rotate the sol to obtain ...

Embodiment 2

[0034] Example 2 Catalytic Degradation of Rhodamine B in P-doped Samples Calcined at Different Temperatures under Sunlight

[0035] Weigh 5 mg of P-doped samples calcined at different temperatures (400 °C, 500 °C, 600 °C, 700 °C, 800 °C) into 5 quartz cups, and then add 25 mL of 0.01 g / L rhodamine B solution to avoid After 15 minutes of photo-ultrasound, 5 quartz cups were irradiated under outdoor sunlight for 30 minutes at the same time, and 3 mL of degraded turbid liquid was taken out from the 5 quartz cups, centrifuged, and the supernatant was taken to measure the absorbance A value at the peak position of 553 nm. According to the formula D%=(1-A t / A 0 )×100 to calculate the decolorization rate.

Embodiment 3

[0036] Example 3 Different types of titanium dioxide degrade rhodamine B under sunlight

[0037] Weigh 5 mg of undoped titanium dioxide, P-doped titanium dioxide, and P25 into the same quartz cups, and then add 25mL 0.01g / L Rhodamine B solution to the three quartz cups, avoid light and ultrasonically for 15 minutes, and then take another The same concentration of rhodamine B solution was also added to the same quartz cup, and the four quartz cups were placed in the outdoor sunlight for 40 minutes, and samples were taken every 10 minutes, centrifuged, and the supernatant was taken to test the absorption spectrum, and the light was taken after four samples. , read the absorption A value at the 553nm peak position, according to the formula D%=(1-A t / A 0 )×100 to calculate the decolorization rate, get Figure 5 .

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Abstract

The invention relates to phosphor doping type nano titanium dioxide having efficient sunlight catalytic capability and a preparation method thereof. The average grain size of the phosphor doping type nano titanium dioxide is no more than15nm, and the specific surface of the nano titanium dioxide is 126.9m<2> / g. The preparation method is: taking tetrabutyl titanate as titanium source and phosphoric acid as phosphorus source, and using sol-gel method to synthesize phosphor doping type nano titanium dioxide grains; and grinding the obtained solid to be fine, and calcining at 400-900 DEG C to obtain P doping nano titanium dioxide grains. The best calcination temperature is 500 DEG C. The invention only requires to add phosphoric acid in alcoholic solution of tetrabutyl titanate to obtain phosphor doping nano titanium dioxide grains. When the nano grains are used for performing photocatalytic degradation on dye rhodamine B, sunlight can be directly adopted as the light source, and under the same conditions, the efficiency of photocatalytic degradation can exceed the commercial P25.

Description

technical field [0001] The invention relates to a non-metal element phosphorus-doped nano-titanium dioxide, in particular to a phosphorus-doped nano-titanium dioxide with high-efficiency solar photocatalysis performance, and a preparation method of the nano-titanium dioxide. Background technique [0002] Heterogeneous photocatalysis is an excellent technology for the removal of organic and inorganic pollutants in wastewater, however, most of the practical photocatalytic systems that people pay attention to now focus on the application of renewable solar energy resources. Catalytic degradation of organic pollutants using solar light excitation has better commercial prospects than artificial ultraviolet light excitation processes that require high energy input (Angew. Chem. Int. Ed., 2003, 42, 4908-4911.). [0003] The molecular structure of anatase titanium dioxide is an efficient photocatalytic material, which can play a great role in air purification, water pollution treatm...

Claims

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Application Information

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IPC IPC(8): B01J27/18B01J21/06B01J37/00C02F1/30C02F1/58C02F101/30
CPCY02W10/37
Inventor 冯玉英吕英英周家宏黄鹤勇
Owner NANJING NORMAL UNIVERSITY
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