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Preparation method of visible-light response type attapulgite-BiOX-TiO2 compound photo-catalyst

An attapulgite and catalyst technology, which is applied in the field of preparation of attapulgite-BiOX-TiO2 composite photocatalyst, can solve the problems of large forbidden band width, low quantum efficiency, easy recombination of photogenerated electrons and holes, and achieves low cost , good coating effect, excellent visible light catalytic performance

Active Publication Date: 2013-07-24
江苏诚丰新材料股份有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] TiO 2 It is one of the research hotspots of photocatalytic materials at present, but nano-TiO 2 It has a large band gap (3.2eV), only responds to ultraviolet light with a wavelength λ≤387.5nm, and has low quantum efficiency, and photogenerated electrons and holes are easy to recombine

Method used

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  • Preparation method of visible-light response type attapulgite-BiOX-TiO2 compound photo-catalyst
  • Preparation method of visible-light response type attapulgite-BiOX-TiO2 compound photo-catalyst
  • Preparation method of visible-light response type attapulgite-BiOX-TiO2 compound photo-catalyst

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Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: ATT-BiOBr-TiO is synthesized according to the following steps 2 -0.83 composite photocatalyst:

[0020] a) Weigh 5 g of attapulgite and add it to 200 mL of deionized water, stir to promote its dissolution, use the pouring method to remove the sediment settled at the bottom, then sonicate for 1 hour, remove the sediment again, and make attapulgite suspension;

[0021] b) Weigh m(Bi(NO 3 ) 3 ·5H 2 (O)= 4.855g, it was dissolved in 5mL of 2mol L -1 HNO 3 After being completely dissolved, slowly add it dropwise to the attapulgite suspension, stir and mix well, then slowly add 2 mol·L -1 Ammonium bromide aqueous solution 10mL, stir for 30min after adding, then add concentrated ammonia water dropwise to it, adjust pH=6~7, stir for 4h, let stand and age overnight, filter with suction, wash with deionized water 2-3 times, 80 ℃ drying, after grinding, put it into a muffle furnace and bake at 200 ℃ for 2h to get ATT-BiOBr semi-finished product;

[0022] c) Ad...

Embodiment 2

[0035] Embodiment 2: ATT-BiOCl-TiO is synthesized according to the following steps 2 -0.75 composite photocatalyst:

[0036] a) Weigh 5 g of attapulgite and add it to 200 mL of deionized water, stir to promote its dissolution, use the pouring method to remove the sediment settled at the bottom, then sonicate for 1 hour, remove the sediment again, and make attapulgite suspension;

[0037] b) Weigh m(Bi(NO 3 ) 3 ·5H 2 (O)= 4.855g, it was dissolved in 10mL of 2mol L -1 In the HCl aqueous solution, after it is completely dissolved, add it dropwise to the attapulgite suspension, stir for 30 minutes, then add concentrated ammonia water dropwise to it, adjust the pH=6~7, stir for 6 hours, let stand and age overnight, filter with suction, remove Wash with ion water for 2-3 times, dry at 60°C, grind and roast in a muffle furnace at 250°C for 4 hours to obtain ATT-BiOCl semi-finished product;

[0038] c) Add 10.21 g of n-butyl titanate to the ATT-BiOCl semi-finished product in step...

Embodiment 3

[0039] Embodiment 3: ATT-BiOI-TiO is synthesized according to the following steps 2 -0.67 composite photocatalyst:

[0040] a) Weigh 5 g of attapulgite and add it to 200 mL of deionized water, stir to promote its dissolution, use the pouring method to remove the sediment settled at the bottom, then sonicate for 1 hour, remove the sediment again, and make attapulgite suspension;

[0041] b) Weigh m(Bi(NO 3 ) 3 ·5H 2 O)= 4.855g, it is dissolved in 5ml of 2mol L -1 HNO 3 After being completely dissolved, slowly add it dropwise to the attapulgite suspension, stir and mix well, then slowly add 2 mol·L -1 Potassium iodide aqueous solution 10mL, stir for 30min after adding, then add concentrated ammonia water dropwise to it, adjust pH = 6~7, stir for 8h, let stand and age overnight, filter with suction, wash with deionized water 2-3 times, and dry at 60°C , roasted in a muffle furnace at 150°C for 6h after grinding to obtain ATT-BiOI semi-finished products;

[0042] c) Add 6....

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Abstract

The invention discloses a preparation method of a visible-light response type attapulgite-BiOX-TiO2 compound photo-catalyst. The preparation method of the visible-light response type attapulgite-BiOX-TiO2 compound photo-catalyst comprises the following steps of: dispersing attapulgite into deionized water with the amount being 40-50 times that of the attapulgite; stirring and removing deposited mud, carrying out ultrasonic dispersion on the treated attapulgite, and removing mud against, so as to obtain a attapulgite suspension; dropping a Bi(NO3)3.5H2O acid solution to the attapulgite suspension, stirring the mixture, dropping a halogen inorganic salt water solution into the stirred mixture, stirring for 30 minutes, then adjusting the pH value to be 6-7 by strong ammonia water, stirring for 4-5 hours, standing and aging for one night, extracting and filtering, drying at 60-100 DEG C, grinding, and baking the ground mixture in a muffle furnace at 150-350 DEG C for 2-6 hours, so as to obtain an ATT-BiOX semi-finished product; and adding certain amount of titanium tetrabutoxide in the ATT-BiOX semi-finished product, stirring uniformly, adding 100mL of deionized water, stirring for 4-8 hours, standing and aging or one night, extracting and filtering, washing by the deionized water, drying at 60 DEG C-100 DEG C, grinding, and baking the ground mixture in the muffler furnace at 150-350 DEG C for 4-8 hours, so as to obtain an ATT-BiOX-TiO2 compound photo-catalyst. The ATT-BiOX-TiO2 compound photo-catalyst provided by the invention has a favorable visible light degrading effect, also can lower the cost, reduces the pollution, and has a favorable application prospect and an economical benefit on the aspect of sewage treatment.

Description

technical field [0001] The invention belongs to using attapulgite as a carrier, and loading BiOX (X=Cl, Br, I)-TiO with visible light response activity on its surface through an in-situ deposition process 2 Composite oxides to prepare attapulgite-BiOX-TiO 2 Composite photocatalyst, specifically related to attapulgite-BiOX-TiO 2 Preparation method of composite photocatalyst. Background technique [0002] Photocatalytic oxidation technology is one of the most effective and environmentally friendly technologies for advanced treatment of organic pollution in wastewater. Although the photocatalytic oxidation technology has a broad-spectrum degradation ability (the degradation rate of organic pollutants is as high as 90-99.9%), and there are few by-products, no secondary pollution, low energy consumption, and easy operation, it has attracted more and more attention. . However, after nearly forty years of research, photocatalytic technology has not played an important role in p...

Claims

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Application Information

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IPC IPC(8): B01J27/135
Inventor 张莉莉张佳慧刘建全周守勇赵宜江仲慧张维光
Owner 江苏诚丰新材料股份有限公司
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