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Preparation method of bismuth oxyiodate photocatalyst

A photocatalyst, bismuth oxyiodate technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of difficult removal of zero-valent mercury, complicated removal process, etc., and achieves excellent photocatalytic performance. The effect of enriching pore structure and reducing energy consumption

Inactive Publication Date: 2017-12-15
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For the above-mentioned technical problems in the prior art, the invention provides a kind of preparation method of oxybismuth iodate photocatalyst, the preparation method of described this oxybismuth iodate photocatalyst will solve the problem of power plant flue gas in the prior art The zero-valent mercury in is not easy to remove, and the removal process is complicated technical problems at the same time

Method used

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  • Preparation method of bismuth oxyiodate photocatalyst
  • Preparation method of bismuth oxyiodate photocatalyst
  • Preparation method of bismuth oxyiodate photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Measure 80ml of ethylene glycol into the beaker, weigh 0.97g of bismuth nitrate pentahydrate into the solution, and keep stirring for 30 minutes. Weigh 0.428g of potassium iodate and add it into the above solution, and continue to stir for 2 hours to form a uniformly mixed emulsion. The above emulsion was centrifugally washed three times with deionized water at a speed of 6000 rad / min, and three times with absolute ethanol at a speed of 8000 rad / min. The washed samples were dried in an oven, the drying temperature was set at 80°C, and the drying time was 8 hours. The dried samples were ground and then put into a muffle furnace for calcination, the calcination temperature was 300 degrees Celsius, and the calcination time was 1 hour. Cool naturally to normal temperature to obtain bismuth oxyiodate photocatalyst.

[0023] figure 1 It is an SEM picture of the prepared bismuth oxyiodate photocatalyst. It can be seen from the figure that the prepared bismuth oxyiodate phot...

Embodiment 2

[0035] The bismuth oxyiodate photocatalyst prepared in embodiment 1 is tested for its activity by removing zero-valent mercury from power plant flue gas:

[0036] The photocatalytic test was carried out at normal temperature and pressure. Take 50 mg of the catalyst sample and put it into a beaker, add 10 ml of ethanol pentahydrate, and ultrasonicate for 5 minutes with an ultrasonic disperser to obtain a uniformly dispersed ethanol pentahydrate solution of bismuth oxyiodate. The above solution was coated on a ground glass slide through a syringe, and the size of the glass slide was 80*80mm. Put the coated glass sheet into an oven to dry for 20 minutes to ensure that the catalyst adheres to the surface of the glass sheet.

[0037] Put the above-mentioned dried glass pieces into the mercury removal experimental platform, start co-adsorption equilibrium for 30 minutes, and then turn on the light to test the adsorption performance of the catalyst.

[0038] After 120 minutes of pho...

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Abstract

The invention provides a preparation method of a bismuth oxyiodate photocatalyst. The preparation method comprises the following steps: adding bismuth nitrate pentahydrate into a glycol solvent, stirring and dissolving to obtain a solution; adding potassium iodate into the solution so that a molar ratio of the added potassium iodate to the bismuth nitrate pentahydrate is 1: 1, and continuing to stir; placing an obtained precursor into a high-speed centrifuge for centrifugal washing at a centrifugation rate of 6000-8000 rpm, washing with deionized water and absolute ethanol to remove impurities; placing samples obtained by centrifugation into an oven for drying; taking out the dried samples and placing into a muffle furnace, calcining in an air atmosphere for 1-2 h at 250-350 DEG C to obtain the bismuth oxyiodate photocatalyst. The bismuth oxyiodate photocatalyst obtained by the preparation method provided by the invention has excellent photocatalytic performance under ultraviolet light and visible light and has good photocatalytic removal ability on gas-phase zero-valent mercury in power plants.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a catalyst, in particular to a preparation method of a bismuth oxyiodate photocatalyst. Background technique [0002] In China, coal accounts for more than 70% of primary energy consumption. During the combustion of coal, heavy metal mercury can be released. Mercury is highly toxic, volatile and bioaccumulative. The removal of mercury from power plant flue gas has attracted increasing attention. Photocatalytic technology is an emerging clean, environmentally friendly, pollution-free technology for removing pollutants. Photocatalytic technology mainly uses sunlight to provide energy, through which light excites semiconductor photocatalysts to generate photogenerated electron holes, and then oxidizes O 2 , H 2 O, etc. form active ions with strong oxidizing effects such as superoxide radicals and free hydroxyl groups. These strong oxidizing active ions can oxidize the zero-valent me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06B01J35/02B01J35/10B01D53/86B01D53/64
CPCB01D53/8665B01J27/06B01D2257/602B01D2258/0283B01J35/00B01J35/30B01J35/61B01J35/39
Inventor 吴江孙小明纪政路程徐凯潘卫国朱良君李庆伟赵丽丽朱凤林施颖燕
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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