Composite bismuth vanadium photocatalyst supported by cobalt oxide and preparation method thereof

A technology of bismuth vanadate and cobalt oxide, which is applied in the field of bismuth vanadate composite photocatalyst and its preparation, can solve the problems that the activity of bismuth vanadate is not suitable for practical application, etc., and achieve the goal of promoting practical application, reducing cost, and high-efficiency photocatalytic activity Effect

Inactive Publication Date: 2006-07-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of bismuth vanadate is a solid-state reaction, involving some ball milling equipment, etc., and does not involve the modification of bismuth vanadate, and the pure activity of bismuth vanadate is not suitable for practical application.

Method used

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  • Composite bismuth vanadium photocatalyst supported by cobalt oxide and preparation method thereof
  • Composite bismuth vanadium photocatalyst supported by cobalt oxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 9.5g of bismuth nitrate and 2.3396g of ammonium metavanadate, dissolve them with 25ml and 75ml of 1.84M nitric acid respectively, then mix them together, add 3.75g of urea, stir and dissolve, place in an oil bath at 90°C for 8 hours, the resulting precipitate was centrifuged, washed with deionized water until neutral, then washed three times with absolute ethanol, and dried in an oven at 80°C for 24 hours. Weigh 1 g of the bismuth vanadate powder prepared by the above method with a small evaporating dish, add 2 ml of 19.42 g / L cobalt nitrate prepared with deionized water, stir evenly, place in a constant temperature oven and dry at 80°C for 24 hours, then After being ground into powder, it was placed in a muffle furnace and baked at 300° C. for 2 hours to obtain a cobalt oxide-supported bismuth vanadate composite photocatalyst responding to visible light.

[0027] The morphology of the prepared composite photocatalyst under the transmission electron microscope is ...

Embodiment 2

[0031] Weigh 4.8507g of bismuth nitrate and 1.1698g of ammonium metavanadate, dissolve them with 25ml of 1.84M nitric acid respectively, then mix them together, add 1.875g of urea, stir and dissolve, place in an oil bath at 90°C for 8 hours at a constant temperature, The resulting precipitate was centrifuged, washed with deionized water until neutral, then washed three times with absolute ethanol, and dried in an oven at 60°C for 48 hours. Weigh 2 g of bismuth vanadate powder prepared by the above method with a small evaporating dish, add 4 ml of 19.42 g / L cobalt nitrate prepared with absolute ethanol, stir evenly, place in a constant temperature oven and dry at 80°C for 24 hours, then After being ground into powder, it was placed in a muffle furnace and baked at 200° C. for 2 hours to obtain a cobalt oxide-loaded bismuth vanadate composite photocatalyst responsive to visible light. The performance test results of phenol degradation: under the irradiation of visible light with...

Embodiment 3

[0033] Weigh 4.8507g of bismuth nitrate and dissolve it with 50ml of 1.84M nitric acid, then add 1.1698g of ammonium metavanadate, mix well, add 1.875g of urea, stir and dissolve, place in an oil bath at 90°C for 8 hours at a constant temperature to form The precipitate was centrifuged, washed with deionized water until neutral, washed three times with absolute ethanol, and dried in an oven at 80°C for 24 hours. Weigh 1 g of bismuth vanadate powder prepared by the above method with a small evaporating dish, add 4 ml of 19.42 g / L cobalt nitrate prepared with deionized water, stir evenly, place in a constant temperature oven and dry at 80°C for 12 hours, then After being ground into powder, it was placed in a muffle furnace and baked at 300° C. for 2 hours to obtain a cobalt oxide-loaded bismuth vanadate composite photocatalyst responsive to visible light. The performance test results of phenol degradation: under the irradiation of visible light with a wavelength greater than 40...

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Abstract

The invention relates the method for preparation of pucherite composite photocatalyst loaded on cobalt oxide. The photocatalyst comprises semi-conductor pucherite particle and cobalt oxide particle. The pucherite is monoclinic crystal system scheelite structure, and the diameter is 100nm-5mum. The grain diameter of cobalt oxide is 10nm-1mum. The mass ratio of cobalt oxide and pucherite is 1-100mg/g. The specific surface area of composite photocatalyst is 0.5-5m2/g. The said photocatalyst can effectively degrade the noxious and harmful chemical under the ultraviolet light, visible light and natural light radiating. And the photocatalyst is easy to separate and recover.

Description

technical field [0001] The invention relates to a bismuth vanadate composite photocatalyst supported by cobalt oxide and a preparation method thereof. The prepared photocatalyst has photocatalytic activity in a wide wavelength range and can efficiently photocatalyze degradation under ultraviolet light, visible light or natural light radiation Toxic and harmful chemicals. The invention belongs to the field of inorganic nanometer photocatalytic materials. Background technique [0002] The current environmental problems and energy crisis have become the two bottlenecks restricting human development. Photocatalytic technology has the potential to solve environmental and energy problems, because the photolysis water technology that converts solar energy into clean hydrogen energy will completely solve the crisis of fossil energy depletion. Photocatalytic decomposition of toxic organic pollutants will become a cheap and feasible way to solve environmental problems. Therefore, se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J37/02B01J37/03B01D53/38C02F1/30
Inventor 蔡伟民龙明策
Owner SHANGHAI JIAO TONG UNIV
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