Method for preparing Fe2O3/Ti-mesoporous composite material (MCM)-41

A technology of MCM-41 and ti-mcm-41, which is applied in the field of preparation of Fe2O3/Ti-MCM-41 mesoporous composite materials, can solve the problems of adsorption and selective catalysis, unresolved application research, and utilization of sunlight Low efficiency and other problems, to achieve the effect of improving photocatalytic reaction efficiency, high BET surface area and pore volume, and uniform pore structure

Inactive Publication Date: 2013-02-13
UNIV OF SHANGHAI FOR SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

But it also has its own limitations, such as TiO 2 Low adsorption capacity leads to low photocatalytic efficiency; band gap, only responds to ultraviolet light, and low utilization rate of sunlight
In December 2010, Jin Yongfei and others published a paper entitled "TiO 2 / ACF Composite Material Degradation of Formaldehyde Experimental Research "paper, the material described in the paper can remove formaldehyde up to 90%, but the material can only respond to ultraviolet light and cannot use sunlight
He Hongyun and others published a paper entitled "Synthesis and Structural Characterization of Ti-Fe-B Zeolite" in the Journal of Natural Sciences of Hunan Normal University, Volume 32, Issue 3, 2009. The synthesis of the material was studied in the paper, but There is no research on its application, especially the removal of formaldehyde, an indoor pollutant, and compared with MCM-41, which has been widely used, B zeolite is still insufficient in terms of adsorption and selective catalysis

Method used

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  • Method for preparing Fe2O3/Ti-mesoporous composite material (MCM)-41

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Weigh 5g of 100-mesh silica gel and add it to 90ml of 1.5mol / l sodium hydroxide solution, and stir vigorously at a constant speed for 30min;

[0024] 2. Measure 60ml of CTAB solution with a mass fraction of 10% and add it to the mixed solution prepared in step a, and stir vigorously at a constant speed for 30 minutes;

[0025] 3. Take 0.5ml of tetrabutyl titanate and add it to the mixture prepared in step b, and stir vigorously at a constant speed for 1 hour;

[0026] 4. Weigh 12g of ferric sulfate and add it to the mixed solution prepared in step c, and stir vigorously at a constant speed for 2 hours;

[0027] 5. Adjust the pH of the sample to 11.5 with 2mol / l HCl, and crystallize at 100°C for 48 hours;

[0028] 6. Wash the sample until neutral, and dry it in a blast drying oven at 100°C for 12 hours;

[0029] 7. Finally, put the dried sample into a muffle furnace and bake it at 300°C for 6 hours to obtain the Fe 2 o 3 / Ti-MCM-41 mesoporous composite.

Embodiment 2

[0031] 1. Weigh 8g of 100-mesh silica gel and add it to 90ml of 1.5mol / l sodium hydroxide solution, and stir vigorously at a constant speed for 35min;

[0032] 2. Measure 60ml of CTAB solution with a mass fraction of 10% and add it to the mixture prepared in step a, and stir vigorously at a constant speed for 35 minutes;

[0033] 3. Take 0.6ml of tetrabutyl titanate and add it to the mixture prepared in step b, and stir vigorously at a constant speed for 1 hour;

[0034] 4. Weigh 15g of ferric sulfate and add it to the mixed solution prepared in step c, and stir vigorously at a constant speed for 2h;

[0035] 5. Adjust the pH of the sample to 11.5 with 2mol / l HCl, and crystallize at 100°C for 45 hours;

[0036] 6. Wash the sample with water until neutral, and dry it in a blast drying oven at 100°C for 10 hours;

[0037] 7. Finally, put the dried sample into a muffle furnace and bake it at 300°C for 6 hours to obtain the Fe 2 o 3 / Ti-MCM-41 mesoporous composite.

Embodiment 3

[0039] 1. Weigh 5g of 200-mesh silica gel and add it to 90ml of 1.5mol / l sodium hydroxide solution, and stir vigorously at a constant speed for 35min;

[0040] 2. Measure 60ml of CTAB solution with a mass fraction of 10% and add it to the mixture prepared in step a, and stir vigorously at a constant speed for 35 minutes;

[0041] 3. Measure 0.8ml of tetrabutyl titanate and add it to the mixture prepared in step b, and stir vigorously at a constant speed for 2 hours;

[0042] 4. Weigh 12g of ferric sulfate and add it to the mixed solution prepared in step c, and stir vigorously at a constant speed for 3h;

[0043] 5. Adjust the pH of the sample to 11.5 with 2mol / l HCl, and crystallize at 100°C for 48 hours;

[0044] 6. Wash the sample until neutral, and dry it in a blast drying oven at 100°C for 12 hours;

[0045] 7. Finally, put the dried sample into a muffle furnace and bake it at 300°C for 6 hours to obtain the Fe 2 o 3 / Ti-MCM-41 mesoporous composite.

[0046] The mate...

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Abstract

The invention discloses a method for preparing a Fe2O3 / Ti-MCM-41 mesoporous composite material. In the method, ordered MCM-41 is used as a carrier, TiO2 is used as a catalyst and is modified by being doped with iron, the iron source is ferric sulfate, the ordered MCM-41 is synthesized by a hydrothermal process, metal titanium atoms are introduced in a framework forming process, and the molar ratio of elements, namely TiO2, SiO2 and cetyltrimethyl ammonium bromide (CTAB), in precursor solution is 0.02:1:0.2. The preparation method comprises the following preparation steps: adding 100 to 200-mesh silica gel into 1.5 mol / l solution of sodium hydroxide, and violently stirring at a constant speed; adding CTAB solution at a mass percentage concentration of 10 percent into the solution of sodium hydroxide, and violently stirring at a constant speed; adding tetrabutyl titanate into the mixed solution and violently stirring at a constant speed; adding ferric sulfate into the mixed solution and violently stirring at a constant speed; regulating the pH value to 11.5 with 2mol / l HCl regulating solution, and performing a crystallization reaction at 100 DEG C; washing a sample till the sample is neutral and drying in an oven at 100 DEG C; and taking the product out and baking in a muffle furnace at 300 DEG C. The obtained Fe2O3 / Ti-MCM-41 mesoporous composite material has high absorption and photocatalytic performance, high response to sun light and stable performance and can effectively treat a formaldehyde indoor air pollutant.

Description

technical field [0001] The present invention relates to a kind of Fe 2 o 3 / Ti-MCM-41 preparation method of mesoporous composite material, this kind of mesoporous composite material is used for controlling indoor air pollutant formaldehyde. Background technique [0002] With the popularity and popularity of interior decoration, the use of a large number of volatile decorative materials has increased the concentration of indoor pollutants. Formaldehyde is an important component of indoor air pollutants. It is one of the typical organic volatile compounds of aldehydes. It mostly exists in the deep part of the material in the form of resin binder, which is not easy to be released completely, and has the characteristics of long-term and latent. Formaldehyde is a toxic substance in the original plasma, which has stimulating and harmful effects on the human body. A certain concentration of formaldehyde also has carcinogenic and teratogenic effects, which is particularly harmful ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/76B01J35/10A62D3/10A62D101/28
Inventor 陶红蔡孝辉卑蕾蕾黑晓慧谷守扬许智华徐红燕刘静罗洁莹曾佳思丹张宇然
Owner UNIV OF SHANGHAI FOR SCI & TECH
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