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Rhodamine B-doped modified titanium concentrate photocatalyst and preparation method thereof

A technology of photocatalyst and titanium concentrate, which is applied in the field of photocatalytic chemistry, can solve the problems of high investment in degradation equipment and high cost of degradation operation, and achieve the effects of improving visible light catalytic activity, simple process, and improving photocatalytic activity

Inactive Publication Date: 2013-01-02
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, the energy of ultraviolet radiation in sunlight is low, accounting for only about 4% of the total solar radiation. If semiconductor photocatalysts excited by ultraviolet light are used to degrade inorganic and organic pollutants and their complex systems, the investment in degradation equipment and the degradation operation cost will be high

Method used

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  • Rhodamine B-doped modified titanium concentrate photocatalyst and preparation method thereof
  • Rhodamine B-doped modified titanium concentrate photocatalyst and preparation method thereof
  • Rhodamine B-doped modified titanium concentrate photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In the present embodiment, the composition of the titanium concentrate raw material is: TiO 2 52.25wt%, FeO 35wt%, Fe 2 o 3 8.72wt%, CaO 0.46wt%, SiO 2 1.01wt%, Al 2 o 3 1.23wt%, MnO1.15wt%, MgO0.18wt%.

[0037] The titanium concentrate is crushed and screened to obtain titanium concentrate powder with a diameter of 1 mm.

[0038] Rhodamine B is mixed with the crushed titanium concentrate powder to form a mixed powder, and the mixing ratio accounts for 2.5wt% of the titanium-containing concentrate powder according to Rhodamine B;

[0039] Add 20ml of absolute ethanol to the above mixed powder, and ultrasonically disperse for 10 minutes to form a mixed slurry;

[0040] Use a ball mill to wet mix the mixed slurry of titanium concentrate and rhodamine B into a ball mill tank, and ball mill until the average particle size is 10 μm;

[0041] Put the ball mill jar into the drying oven, dry at 70 °C for 24 h, and dry the mixed slurry into mixed powder;

[0042] Grind...

Embodiment 2

[0051] In this embodiment, select titanium concentrate raw material to be composed of: TiO 2 50.94wt%, FeO 28.59wt%, Fe 2 o 3 15.22wt%, CaO 0.75wt%, SiO 2 1.64wt%, Al 2 o 3 1.70wt%, MnO1.43wt%, MgO0.1wt%.

[0052] Crush the titanium concentrate, and obtain titanium concentrate powder with a diameter of 0.5 mm after screening;

[0053] Rhodamine B is mixed with the crushed titanium concentrate powder to form a mixed powder, and the mixing ratio accounts for 2.5wt% of the titanium-containing concentrate powder according to Rhodamine B;

[0054] Add 30ml of absolute ethanol to the mixed powder, and ultrasonically disperse for 15 minutes to form a mixed slurry;

[0055] Put the mixed slurry of titanium concentrate and rhodamine B into a ball mill tank with a ball mill, and wet-mix ball mill until the average particle size is 12 μm;

[0056] Put the ball mill jar into a drying oven and dry at 70 °C for 24 h to dry the mixed slurry into a mixed powder;

[0057] Grind the d...

Embodiment 3

[0063] In this embodiment, select titanium concentrate raw material to be composed of: TiO 2 54.5wt%, FeO 25.23wt%, Fe 2 o 3 14.3wt%, CaO 0.42wt%, SiO 2 1.95wt%, Al 2 o 3 1.98wt%, MnO1.53wt%, MgO0.09wt%.

[0064] Crushing the titanium concentrate, and obtaining titanium concentrate powder with a diameter of 0.7 mm after screening;

[0065] Rhodamine B is mixed with the crushed titanium concentrate powder to form a mixed powder, and the mixing ratio accounts for 5wt% of the titanium-containing concentrate powder according to Rhodamine B;

[0066] Add 40ml of absolute ethanol to the mixed powder, and ultrasonically disperse for 20 minutes to form a mixed slurry;

[0067] Put the mixed slurry of titanium concentrate and rhodamine B into a ball mill tank with a ball mill, and wet-mix ball mill until the average particle size is 13 μm;

[0068] Put the ball mill jar into a drying oven and dry at 70 °C for 24 h to dry the mixed slurry into a mixed powder;

[0069] Grind the...

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Abstract

The invention belongs to the field of photocatalytic chemistry, and in particular relates to a rhodamine B-doped modified titanium concentrate photocatalyst. The crystal phase composition of the catalyst is 15~20wt% of titanomagnetite, 30~40wt% of ilmenite, 20~-30wt% of titanium dioxide, and 20~35wt% of titanium oxide; wherein the undecomposed rhodamine B is 0.9~ 7wt%, the specific surface area is 351~528m2 / kg, and the average particle size is 10~16μm. The preparation process includes crushing large pieces of titanium concentrate, mixing it with rhodamine B according to different doping ratios, ultrasonically dispersing the mixed powder, ball milling wet mixing, drying, and grinding, and the obtained compound is activated by low-temperature roasting, and then ground after cooling . The rhodamine B-doped modified titanium concentrate photocatalyst has strong light absorption and light response under visible light excitation, is used for catalytic photodegradation of organic and inorganic pollutants and complex systems in water, and has good social and economic benefits.

Description

technical field [0001] The invention belongs to the field of photocatalytic chemistry, and in particular relates to a rhodamine-doped modified titanium concentrate photocatalyst and a preparation method thereof. Background technique [0002] With the development of the world economy, energy and environmental problems have become increasingly severe, so the application of semiconductor photocatalytic degradation technology in environmental protection has received extensive attention. At present, the most researched semiconductor photocatalytic materials are TiO 2 , ZnO, CdS, WO 3 , Fe 2 o 3 , PBs, SnO 2 、In 2 o 3 , ZnS, SrTiO 3 and SiO 2 Wait for more than a dozen. These semiconductor oxides all have certain photocatalytic activity, but most of them are prone to chemical or photochemical corrosion. Among them, TiO 2 It has good chemical stability, non-toxicity, no secondary pollution, and high catalytic activity. It is a good photocatalytic material, but pure TiO ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38C02F1/30
CPCY02W10/37
Inventor 薛向欣雷雪飞杨合
Owner NORTHEASTERN UNIV LIAONING
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