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Graphene-loaded iodate oxygen bismuth photocatalyst as well as preparation method and application thereof

A technology of bismuth oxyiodate and photocatalyst, which is applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of poor mercury removal effect in coal-fired flue gas, and broaden the photoresponse range , high repeatability, and extended life

Pending Publication Date: 2020-02-14
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a graphene-supported bismuth oxyiodate photocatalyst and its preparation method in view of the poor effect of mercury removal in coal-fired flue gas in the prior art

Method used

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  • Graphene-loaded iodate oxygen bismuth photocatalyst as well as preparation method and application thereof
  • Graphene-loaded iodate oxygen bismuth photocatalyst as well as preparation method and application thereof
  • Graphene-loaded iodate oxygen bismuth photocatalyst as well as preparation method and application thereof

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Embodiment 1

[0031] The present embodiment provides a kind of preparation method of graphene supported bismuth oxyiodate photocatalyst, concrete steps are as follows:

[0032] Step 1: 10mmol bismuth nitrate pentahydrate [Bi(NO 3 ) 3 ·5H 2 O] was dissolved in 80mL deionized water, and magnetically stirred for 30min to obtain solution A;

[0033] Step 2: 10mmol potassium iodate (KIO 3 ) was dissolved in the solution A prepared in step 1, and magnetically stirred for 30 minutes to obtain solution B;

[0034] Step 3: Put solution B in a 150mL hydrothermal reaction kettle, conduct a hydrothermal reaction at a temperature of 160°C for 12 hours, then wash with deionized water and absolute ethanol for 3 times, and dry in an oven at 80°C 12h, ground into powder in a mortar, obtained bismuth oxyiodate (BiOIO 3 )powder;

[0035] Step 4: Weigh 1 g of the bismuth oxyiodate powder prepared in Step 3 and dissolve it in 80 mL of deionized water, and stir it magnetically for 30 minutes to obtain solu...

Embodiment 2

[0040] This embodiment provides the application of the graphene-supported bismuth oxyiodate photocatalyst in the photocatalytic oxidation of elemental mercury, and the specific steps are as follows:

[0041] Step 1: Take by weighing the graphene-loaded bismuth oxyiodate photocatalyst obtained in the embodiment 1 of 30mg, be dissolved in the beaker that 10mL dehydrated alcohol is housed;

[0042]Step 2: After the beaker described in step 1 is subjected to ultrasonic vibration operation, the mixture is evenly coated on the quartz glass slide;

[0043] Step 3: Place the quartz glass slide described in step 2 in an oven at 80°C, and dry it for 10 minutes to obtain the quartz glass slide to be reacted;

[0044] Step 4: place the quartz glass slide to be reacted in step 3 in a heterogeneous photocatalytic reactor, conduct a photocatalytic oxidation experiment of elemental mercury and record the experimental data;

[0045] Step 4: take by weighing the pure bismuth oxyiodate (BiO10) ...

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Abstract

The invention provides a graphene-loaded iodate oxygen bismuth photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: adding bismuth nitrate pentahydrate into deionized water and continuously and magnetically stirring; weighing a certain amount of potassium iodate, putting potassium iodate into a mixture obtained in the former step, and continuously and magnetically stirring; putting the mixture into a hydrothermal reaction kettle, and carrying out hydrothermal reaction to obtain a reaction product; washing the reaction product with deionized water and absolute ethyl alcohol respectively, and drying to obtain a solid sample; and compounding the solid sample with graphene at a certain ratio to obtain the graphene-loaded iodate oxygen bismuth photocatalyst. The graphene-loaded iodate oxygen bismuth photocatalyst disclosed by the invention has a relatively high specific surface area and excellent photocatalytic performance.

Description

technical field [0001] The invention belongs to the field of bismuth-based composite materials, and in particular relates to a graphene-supported bismuth oxyiodate photocatalyst and a preparation method and application thereof. Background technique [0002] Economic development is inseparable from the input of energy, and my country's energy supply will be dominated by coal for a long time. Coal plays a pivotal role in the development of the national economy. At present, coal accounts for about 70% of the primary energy consumption. The combustion of coal is accompanied by the emission of a large amount of air pollutants. Taking thermal power plants as an example, common flue gas pollutants include sulfur dioxide, nitrogen oxides, dust and heavy metal pollutants. The discharge of these pollutants has a bad impact on the ecological environment and a threat to the human production and living environment. The development of high-efficiency and low-cost pollutant control tech...

Claims

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Application Information

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IPC IPC(8): B01J27/06B01D53/86B01D53/64
CPCB01J27/06B01D53/8665B01D2258/0283B01J35/39
Inventor 吴江凌杨罗非刘启贞毛旭王崇洋刘海龙何平马昕霞朱凤林
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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