Gold-supported bismuth subcarbonate material for photocatalysis and preparation method

A technology of bismuth oxycarbonate and photocatalysis, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of being unable to be used as photocatalytic materials and limited quantum efficiency, and achieve good catalytic effects Effect

Active Publication Date: 2015-12-09
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are many preparation methods, there are still some shortcomings, and its quantum efficiency is limited, so it cannot be used as a suitable photocatalytic material

Method used

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  • Gold-supported bismuth subcarbonate material for photocatalysis and preparation method
  • Gold-supported bismuth subcarbonate material for photocatalysis and preparation method
  • Gold-supported bismuth subcarbonate material for photocatalysis and preparation method

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Embodiment

[0019] Weigh 0.46g sodium carbonate [Na 2 CO 3 ], 1.6g ammonium bismuth citrate [C 6 h 13 BiN 2 o 7 ·H 2 O] was added to 70ml of water and stirred at room temperature until the solution was a suspension.

[0020] The above suspension was transferred into a 100ml polytetrafluoroethylene reactor for reaction, reacted at 160°C for 24 hours, cooled naturally, and the obtained precipitate was centrifuged, washed and dried to obtain bismuth oxycarbonate microspheres.

[0021] Weigh 0.5g bismuth oxycarbonate, add 1.26g urea into 50ml water, add 2.6mM chloroauric acid at the same time, put them together into a round bottom flask, stir magnetically, and react at 80°C for 4h under the condition of heating in a water bath.

[0022] After the reaction, cool naturally, centrifuge, wash and dry the precipitate, and finally put the sample into a muffle furnace at 350° C. for 2 hours to obtain gold-supported bismuth oxycarbonate.

[0023] Photocatalytic performance test of materials

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Abstract

The invention relates to a gold-supported bismuth subcarbonate material for photocatalysis and a preparation method thereof, and belongs to the field of inorganic nano-materials. The preparation method of gold-supported bismuth subcarbonate microspheres comprises the steps that firstly, ammonium bismuth citrate and sodium carbonate are added in water and stirred to obtain an even supernatant solution; secondly, the solution is placed in a hydrothermal reaction kettle for a hydrothermal reaction at 160 DEG C for 24 h; thirdly, precipitate obtained through the reaction is centrifuged, washed and dried to obtain bismuth subcarbonate nanospheres. The gold supporting method comprises the steps that the prepared bismuth subcarbonate reacts with urea, chloroauric acid and water on the water bath condition at 80 DEG C for 4 h, washing and drying are performed after natural cooling is performed, and then the gold-supported bismuth subcarbonate nanospheres are obtained. According to the prepared gold-supported bismuth subcarbonate nanospheres, the physical phase is orthorhombic-phase bismuth subcarbonate of which the JCPDS number is 84-1752, the nanospheres are in the shape of a sphere, the diameter is 2-5 micrometers, and the size of gold particles on the surfaces is 5-10 nm.

Description

technical field [0001] The invention belongs to the technical field of inorganic nanometer materials and environmental pollution control, and specifically relates to a gold-loaded bismuth oxycarbonate material with high-efficiency photocatalytic activity that can be used to degrade pollutants (dye) and a preparation method. Background technique [0002] With the rapid expansion of population and the rapid development of industry, the problem of environmental pollution has become the primary problem affecting human production and life. Governments of various countries have listed environmental pollution control as a top priority at this stage and in the next few years. In particular, the massive discharge of methyl orange and other water-soluble azo dyes in the printing and dyeing industry has deteriorating the water quality on which human beings depend. These pollutants are difficult to biodegrade. Once they enter the water body, due to the slow natural degradation process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232C02F1/30C02F101/30
Inventor 刘碧桃陈源莫琼花闫雪莲李璐
Owner CHONGQING UNIV OF ARTS & SCI
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