Nano TiO2-diatomite composite photocatalyst and preparation method thereof

A diatomite and composite light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low utilization rate of visible light, low degradation ability of organic pollutants, etc., to improve visible light utilization, avoidance of competing adsorption problems, tight binding effects

Active Publication Date: 2016-07-06
CHINA BUILDING MATERIALS ACAD
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Problems solved by technology

[0003] The embodiment of the present application provides a nano-TiO 2 -Diatomite composite photocatalyst and its preparation method solve the problems of low utilization rate of visible light and low degradation ability of organic pollutants in composite photocatalysts in the prior art, and improve the utilization rate of composite photocatalysts to visible light and organic pollutants Degradability of Pollutants

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  • Nano TiO2-diatomite composite photocatalyst and preparation method thereof
  • Nano TiO2-diatomite composite photocatalyst and preparation method thereof

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Embodiment 1

[0029] Diatomite raw ore is removed silt and dried, and prepared diatomite raw soil is standby; 17kg titanium tetrachloride is mixed with the titanium tetrachloride solution that mass fraction is 50%, is made into the mass concentration of 5.61kg ammonium sulfate 200g / L ammonium sulfate solution, titanium tetrachloride solution and ammonium sulfate solution are slowly added to 600LpH respectively in the hydrochloric acid solution of 3 and vigorously stirred for 30min to obtain an acidic mixed solution containing titanium tetrachloride and ammonium sulfate, the The pH of the acidic mixed solution is still 3, wherein the mass concentration of titanium tetrachloride is 26.0g / L; 10 kg of diatomite raw soil is added to the acidic mixed solution, and vigorously stirred for 30 minutes to obtain a slurry; Add ammonium carbonate solution with a mass concentration of 100g / L, adjust the pH value of the slurry to 6, and then age the slurry at a temperature of 28°C for 3 hours; filter the a...

Embodiment 2

[0031] Diatomite raw ore is removed silt and dried, and prepared diatomite raw soil is standby; 22kg titanium tetrachloride is mixed with the titanium tetrachloride solution that mass fraction is 50%, is made into the mass concentration of 7.26kg ammonium sulfate 200g / L of ammonium sulfate solution, titanium tetrachloride solution and ammonium sulfate solution are slowly added to 600LpH respectively in the hydrochloric acid solution of 2 and vigorously stirred for 30min to obtain an acidic mixed solution containing titanium tetrachloride and ammonium sulfate. The pH of the acidic mixed solution is still 2, wherein the mass concentration of titanium tetrachloride is 32.8g / L; 10 kg of diatomite raw soil is added to the acidic mixed solution, and vigorously stirred for 30 minutes to obtain a slurry; Add the ammonium carbonate solution whose mass concentration is 250g / L, adjust the pH value of this slurry to 7, then carry out aging, the aging temperature is 20 ℃, and the aging time...

Embodiment 3

[0033] Diatomite raw ore is removed silt and dried, and diatomite raw soil is prepared for subsequent use; 12kg titanium tetrachloride is mixed with the titanium tetrachloride solution that mass fraction is 50%, is made into the mass concentration of 2.64kg ammonium sulfate 200g / L of ammonium sulfate solution, titanium tetrachloride solution and ammonium sulfate solution are slowly added to 600LpH respectively in the hydrochloric acid solution of 2 and vigorously stirred for 30min to obtain an acidic mixed solution containing titanium tetrachloride and ammonium sulfate. The pH of the acidic mixed solution is still 2, wherein the mass concentration of titanium tetrachloride is 19.0g / L; 10 kg of diatomite raw soil is added to the acidic mixed solution, and vigorously stirred for 30 minutes to obtain a slurry; Add ammonium carbonate solution with a mass concentration of 190g / L, adjust the pH value of the slurry to 8, and then age, the aging temperature is 25°C, and the aging time ...

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Abstract

The invention discloses a nano TiO2-diatomite composite photocatalyst and a preparation method thereof. The nano TiO2-diatomite composite photocatalyst is prepared from the following raw materials: raw diatomite, titanium tetrachloride, ammonium sulfate and iron salt, wherein the mass ratio of the raw materials is that the ratio of the raw diatomite to the titanium tetrachloride is 100 to (80-200), and the ratio of the titanium tetrachloride to the ammonium sulfate to the iron salt is 100 to (17-66) to (0-0.7). With the adoption of the composite photocatalyst, the problems in the prior art that the visible light utilization rate of the composite photocatalyst is low and the degradation capability on organic pollutants is low are solved, the visible light utilization rate of the composite photocatalyst is improved, and the degradation capability on the organic pollutants is improved.

Description

technical field [0001] The invention relates to the field of catalytic materials, in particular to a nano-TiO 2 -Diatomite composite photocatalyst and preparation method thereof. Background technique [0002] Various harmful gases inevitably exist around the buildings where people work and live, mainly total volatile organic compounds (TVOCs) such as radon, ammonia, benzene, and formaldehyde. These harmful gases have different degrees of harm to the human body. The removal and degradation of these harmful pollutants has always been a matter of great concern. Due to its unique ordered microporous structure, high porosity, large pore volume, light weight, large specific surface area, strong adsorption and good activity, diatomite can be used as an adsorbent for harmful pollutants to improve indoor environment. However, there is a certain degree of saturation in the adsorption of diatomite to harmful pollutants. When the maximum adsorption capacity of diatomite is reached, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/16B01J21/06
CPCB01J21/063B01J21/16B01J35/004
Inventor 冀志江张琎珺王静王晓燕侯国艳王继梅
Owner CHINA BUILDING MATERIALS ACAD
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