Rose Bengal-doped modified titanium concentrate photocatalyst and preparation method thereof

A technology of photocatalyst and titanium concentrate, 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, low preparation cost, and improving photocatalytic activity

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

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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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  • Rose Bengal-doped modified titanium concentrate photocatalyst and preparation method thereof
  • Rose Bengal-doped modified titanium concentrate photocatalyst and preparation method thereof
  • Rose Bengal-doped modified titanium concentrate photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The present embodiment selects the composition of titanium concentrate raw material as TiO 2 47.01wt%, FeO 34.27wt%, Fe 2 o 3 10.55wt%, CaO 0.75wt%, SiO 2 2.89wt%, Al 2 o 3 1.34wt%, MnO0.65wt%, MgO2.54wt%.

[0034] Crush the massive ilmenite concentrate, screen the ilmenite concentrate powder with a diameter of 0.5-1mm, mix the tiger red with the crushed ilmenite concentrate powder, and the mixing ratio is 2.5wt% of the titanium concentrate powder with tiger red.

[0035] Use a ball mill to dry-mix the mixed powder of titanium concentrate and tiger bengal until the average particle size is 10 μm.

[0036] Compress the mixed powder into tablets with a tablet machine.

[0037] Put the compressed sample into a muffle furnace for roasting, the roasting temperature is 100°C, the heating rate is 5°C / min, the roasting time is 2h, after the roasting is finished, it is cooled to room temperature in the air, and then ground to an average particle size of 10 μm , Obtain a...

Embodiment 2

[0046] The present embodiment selects the composition of titanium concentrate raw material as TiO 2 47.93wt%, FeO 28.61wt%, Fe 2 o 3 16.68wt%, CaO 0.8wt%, SiO 2 2.27wt%, Al 2 o 3 1.07wt%, MnO0.07wt%, MgO2.57wt%.

[0047] Crush the massive ilmenite concentrate, screen the ilmenite concentrate powder with a diameter of 0.5-1mm, mix the tiger red with the crushed ilmenite concentrate powder, and the mixing ratio is 2.5wt% of the titanium concentrate powder with tiger red.

[0048] Use a ball mill to dry-mix the mixed powder of titanium concentrate and tiger bengal until the average particle size is 12 μm.

[0049] Compress the mixed powder into tablets with a tablet machine.

[0050] Put the compressed sample into a muffle furnace for roasting, the roasting temperature is 200°C, the heating rate is 10°C / min, the roasting time is 3h, after the roasting is finished, it is cooled to room temperature in the air, and then ground to an average particle size of 12 μm , Obtain t...

Embodiment 3

[0055] The present embodiment selects the composition of titanium concentrate raw material as TiO 2 48.93wt%, FeO 32.37wt%, Fe 2 o 3 14.86wt%, CaO 0.84wt%, SiO 2 1.05wt%, Al 2 o 3 1.08wt%, MnO0.23wt%, MgO0.64wt%.

[0056] Crush the massive titanium concentrate, screen the titanium concentrate powder with a diameter of 0.5-1mm, mix the tiger red with the crushed titanium concentrate powder, and the mixing ratio is 5wt% of the titanium concentrate powder with tiger red.

[0057] Use a ball mill to dry-mix the mixed powder of titanium concentrate and tiger bengal until the average particle size is 13 μm.

[0058] Compress the mixed powder into tablets with a tablet machine.

[0059] Put the compressed sample into a muffle furnace for roasting, the roasting temperature is 300°C, the heating rate is 5°C / min, and the roasting time is 4h. After the roasting is completed, it is cooled to room temperature in the air, and then ground to an average particle size of 13 μm. , Obtai...

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Abstract

The invention belongs to the field of photocatalytic chemistry, and in particular relates to a tiger red doped modified titanium concentrate photocatalyst and a preparation method thereof. The content range of each crystal phase of the catalyst: titanomagnetite 13-25wt%, ilmenite 38-48wt%, titanium dioxide 13-18wt%, titanium oxide 11-25wt%; the catalyst contains 0.9 -7wt%, the specific surface area is 390-480m2 / kg, and the average particle size is 10-15μm. The preparation process includes mixing the crushed titanium concentrate powder and tiger red according to the doping ratio, dry mixing by ball milling, and tableting. The obtained compound is activated by low-temperature roasting, and then ground after cooling. The tiger red 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 tiger red doped modified titanium concentrate photocatalyst and a preparation method thereof. Background technique [0002] In recent years, a large number of studies have proved that: due to its unique semiconductor properties, perovskite composite oxides can increase the photodegradation reaction rate of inorganic and organic pollutants under the irradiation of ultraviolet-visible light, and in a short reaction time It can achieve the ideal treatment effect of decomposing pollutants, so it becomes the most promising photocatalyst. The main problem at present is that the preparation of perovskite oxides is mostly done under strict experimental conditions with chemical reagents, the production volume is small, and the cost is high. In addition, the perovskite oxides absorb light when they catalyze Mainly in the ultraviolet region, the utilization rate of sol...

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 雷雪飞薛向欣杨合
Owner NORTHEASTERN UNIV LIAONING
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