CN107469839A - A kind of preparation method of acid iodide oxygen bismuth photochemical catalyst - Google Patents

A kind of preparation method of acid iodide oxygen bismuth photochemical catalyst Download PDF

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Publication number
CN107469839A
CN107469839A CN201710691311.0A CN201710691311A CN107469839A CN 107469839 A CN107469839 A CN 107469839A CN 201710691311 A CN201710691311 A CN 201710691311A CN 107469839 A CN107469839 A CN 107469839A
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China
Prior art keywords
photochemical catalyst
acid iodide
oxygen bismuth
iodide oxygen
bismuth
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Pending
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CN201710691311.0A
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Chinese (zh)
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
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Shanghai University of Electric Power
University of Shanghai for Science and Technology
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Shanghai University of Electric Power
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/06Halogens; Compounds thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/8665Removing heavy metals or compounds thereof, e.g. mercury
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39Photocatalytic properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/60Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/61Surface area
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/60Heavy metals or heavy metal compounds
    • B01D2257/602Mercury or mercury compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Catalysts (AREA)

Abstract

The invention provides a kind of preparation method of acid iodide oxygen bismuth photochemical catalyst, five water bismuth nitrates is added in ethylene glycol solvent, stirring and dissolving;Potassiumiodate is added in above solution so that the mol ratio of the Potassiumiodate of addition and five water bismuth nitrates is 1:1, and continue to stir;The precursor solution of gained is put into centrifuge washing in supercentrifuge, centrifugation rate is 6,000 8000 rpm, is washed with deionized water and absolute ethyl alcohol, goes the removal of impurity;Centrifugation gained sample is put into baking oven and dried;Take out the sample dried to be put into Muffle furnace, calcined in air atmosphere, calcination time is 1 2h, and calcining heat is 250 350 DEG C, obtains acid iodide oxygen bismuth photochemical catalyst.The acid iodide oxygen bismuth photochemical catalyst that the present invention obtains photocatalysis performance under ultraviolet light and visible ray is superior, has good photocatalysis removing ability to power plant's gas phase nonvalent mercury.

Description

A kind of preparation method of acid iodide oxygen bismuth photochemical catalyst
Technical field
The invention belongs to chemical field, is related to a kind of catalyst, specifically a kind of system of acid iodide oxygen bismuth photochemical catalyst Preparation Method.
Background technology
In China, coal accounts for more than the 70% of primary energy consumption.Coal can release heavy metal during burning Mercury, mercury have hypertoxicity, volatility and bioaccumulation, and removing power-plant flue gas mercury is increasingly subject to the attention of people.Photocatalysis skill Art be it is a kind of it is emerging clean, be environmentally friendly, the technology of pollution-free removing pollutant.Photocatalysis technology mainly provides energy using sunshine Amount, by photo-excited semiconductor photochemical catalyst, photo-generate electron-hole is produced, then aoxidizes O2, H2O etc. formed superoxide radical, from There is the active ion of strong oxidation by hydroxyl etc., the oxidable absorption of active ion of these strong oxidizing properties is in catalyst surface Nonvalent mercury, its catalysis oxidation is converted into bivalent mercury, so as to be removed by the existing air pollution control devices of power plant.
The content of the invention
For above-mentioned technical problem of the prior art, the invention provides a kind of preparation side of acid iodide oxygen bismuth photochemical catalyst Method, the preparation method of described this acid iodide oxygen bismuth photochemical catalyst will solve nonvalent mercury in power-plant flue gas of the prior art not Easily remove, while remove the technical problem of complex process.
The invention provides a kind of preparation method of acid iodide oxygen bismuth photochemical catalyst, comprise the following steps:
(1) five water bismuth nitrates are added in ethylene glycol solvent, the material ratio of five described water bismuth nitrates and ethylene glycol is 0.01~0.1 mole:80 milliliters, stir 20~50 minutes;
(2) Potassiumiodate is added in above solution so that the mol ratio of the Potassiumiodate of addition and five water bismuth nitrates is 1:1, And continue to stir 1-3 hours;
(3) precursor solution of gained is put into centrifuge washing in supercentrifuge, centrifugation rate 6000-8000rpm, Washed with deionized water and absolute ethyl alcohol, go the removal of impurity;
(4) centrifugation gained sample is put into baking oven and dried;
(5) take out the sample dried to be put into Muffle furnace, calcined in air atmosphere, calcination time 1-2h, calcined Temperature is 250-350 DEG C, obtains acid iodide oxygen bismuth photochemical catalyst.
Acid iodide oxygen bismuth produced by the present invention is sclay texture, and this structure has larger specific surface area, to flue gas zero Valency mercury has good adsorptivity, and can at utmost absorb visible ray, improves the efficiency of light energy utilization.
The acid iodide oxygen bismuth of the present invention has advantages below:
1) preparation method is simple, can be prepared on a large scale, and single single bottle preparation amount is up to gram level scale;
2) there is the pore structure compared with horn of plenty, can effectively adsorb pollutant, then be catalytically conveted to innocuous substance;
3) energy gap is suitable, can effectively utilize sunshine, reduces energy resource consumption;
4) self-forming internal polar power plant, comprising dication, there is good photo-generate electron-hole separation effect.
5) it is an object of the invention to provide a kind of preparation method of acid iodide oxygen bismuth photochemical catalyst, and it is applied to this hair Bright to be compared with prior art, its technological progress is significant.The acid iodide oxygen bismuth photochemical catalyst that the present invention obtains is in ultraviolet light and can See that photocatalysis performance is superior under light, there is good photocatalysis removing ability to power plant's gas phase nonvalent mercury, can be applied to photocatalysis Remove power-plant flue gas nonvalent mercury.
Brief description of the drawings
Fig. 1 is that the SEM of the product of the embodiment of the present invention 1 schemes.
Fig. 2 is that the TEM of the product of the embodiment of the present invention 1 schemes.
Fig. 3 is that the UV-vis of the product of the embodiment of the present invention 1 schemes.
Fig. 4 is the photocatalytic mechanism figure of the product of the embodiment of the present invention 1.
Embodiment
Embodiment 1
Measure 80ml ethylene glycol to add in beaker, weigh the water bismuth nitrates of 0.97g five and add solution, persistently stir 30 minutes. Weigh 0.428g Potassiumiodates to add in above-mentioned solution, persistently stir 2 hours, form well mixed emulsion.By above-mentioned milkiness Liquid carries out centrifuge washing, three times deionized water centrifuge washing, rotating speed 6000rad/min, three times absolute ethyl alcohol centrifuge washing, turns Speed is 8000rad/min.Sample after washing is put into baking oven and dried, drying temperature is set as 80 DEG C, and drying time 8 is small When.Dried sample is ground processing, is then placed in Muffle furnace and calcines, calcining heat is 300 degrees Celsius, during calcining Between be 1 hour.Normal temperature is naturally cooled to, obtains acid iodide oxygen bismuth photochemical catalyst.
Fig. 1 is the SEM figures of the acid iodide oxygen bismuth photochemical catalyst prepared, it can be seen that prepared acid iodide oxygen bismuth light Catalyst is plumage flocculent structure, and length is 0.9~1.1 micron, and width is 0.2~0.4 micron.Show the acid iodide oxygen of this structure Bismuth photochemical catalyst has abundant pore structure, and specific surface area is larger, has good absorption property to gas phase nonvalent mercury, and compared with Big specific surface area also has more preferable utilization ratio to ultraviolet and visible ray.
Fig. 2 is the HRTEM figures of the acid iodide oxygen bismuth photochemical catalyst prepared, it can be seen that prepared acid iodide oxygen bismuth Photochemical catalyst has more lattice defect, shows this acid iodide oxygen bismuth photochemical catalyst photo-generate electron-hole good separating effect, resists Photoetch sexuality is strong, has photocatalysis stability, is advantageous to commercial Application.
Fig. 3 is the UV-vis figures of the acid iodide oxygen bismuth photochemical catalyst prepared, it can be seen that prepared acid iodide oxygen bismuth The energy gap of photochemical catalyst is 2.9eV, shows that this acid iodide oxygen bismuth photochemical catalyst has suitable energy gap, will can inhale Attached water photocatalytic conversion is free hydroxyl, and then nonvalent mercury is oxidized into bivalent mercury.
The present invention prepares acid iodide oxygen bismuth photochemical catalyst by the method for co-precipitation-calcining, and preparation method is simple, suitable big rule Mould produces.Prepared acid iodide oxygen bismuth photochemical catalyst energy gap is suitable, can effectively utilize ultraviolet light and visible ray.Lattice defect Abundant, photocatalysis property is stable, resistance to photoetch.With abundant pore structure, pollutant, and then photocatalysis can be effectively adsorbed It is converted into innocuous substance.
The present invention reaction principle be:The process of photocatalysis removing power plant nonvalent mercury is an absorption-photochemical catalytic oxidation Process.As shown in formula 1-6 and Fig. 4, the property based on semiconductor light-catalyst, gas phase nonvalent mercury is adsorbed in acid iodide oxygen bismuth light and urged Agent surface, it is changed into ADSORPTION STATE nonvalent mercury, when light irradiation acid iodide oxygen bismuth photochemical catalyst, is excited by illumination, in acid iodide oxygen bismuth light Catalyst surface forms photo-generate electron-hole separation.Due to the presence of acid iodide oxygen bismuth Surface absorption water, can produce a large amount of hydrogen from Son and hydroxide ion, hydroxide ion and free hydroxyl of the photohole reaction generation with strong oxidizing property, free hydroxyl can Surface adsorption state nonvalent mercury is converted into oxidation state mercury, and hydrogen ion can generate ADSORPTION STATE water with oxygen reaction.
BiOIO3+hv→BiOIO3+h++e- (2)
OH-+h+→·OH (4)
O2+4H++4e-→2H2O (6)
Embodiment 2
Acid iodide oxygen bismuth photochemical catalyst prepared by embodiment 1 is tested into its activity by removing power-plant flue gas nonvalent mercury:
Photocatalysis test is carried out at normal temperatures and pressures, takes 50mg catalyst samples to be put into beaker, adds the water of 10ml five Ethanol, with ultrasonic disperse instrument ultrasound 5min, obtain the finely dispersed hydrous ethanol solution of acid iodide oxygen bismuth five.Above-mentioned solution is passed through into note For emitter coated on frosted glass plate, sheet glass size is 80*80mm.Coated sheet glass is put into baking oven and dries 20min, Ensure that catalyst is attached to glass sheet surface.
Above-mentioned dried sheet glass is put into demercuration experiment porch, starts to carry out eutectoid content balance, Ran Houkai in 30 minutes The absorption property of lamp test catalyst.
Test and find by photocatalysis in 120 minutes, acid iodide oxygen bismuth photochemical catalyst prepared by the present invention has preferable flue gas Nonvalent mercury removes performance, to mercury removal efficiency up to 65% in normal temperature and pressure nitrogen environment, and is sent out by test in 120 minutes Existing, removing performance does not decline significantly.

Claims (1)

1. a kind of preparation method of acid iodide oxygen bismuth photochemical catalyst, it is characterised in that comprise the following steps:
(1)Five water bismuth nitrates are added in ethylene glycol solvent, the material ratio of five described water bismuth nitrates and ethylene glycol for 0.01 ~ 0.1 mole:80 milliliters, stir 20 ~ 50 minutes;
(2)Potassiumiodate is added in above solution so that the mol ratio of the Potassiumiodate of addition and five water bismuth nitrates is 1:1, and hold Continuous stirring 1-3 hours;
(3)The precursor solution of gained is put into centrifuge washing in supercentrifuge, centrifugation rate is 6000-8000 rpm, is used Deionized water and absolute ethyl alcohol washing, go the removal of impurity;
(4)Centrifugation gained sample is put into baking oven and dried;
(5)Take out the sample dried to be put into Muffle furnace, calcined in air atmosphere, calcination time 1-2h, calcining heat For 250-350 DEG C, acid iodide oxygen bismuth photochemical catalyst is obtained.
CN201710691311.0A 2017-08-14 2017-08-14 A kind of preparation method of acid iodide oxygen bismuth photochemical catalyst Pending CN107469839A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108249403A (en) * 2018-01-19 2018-07-06 上海电力学院 A kind of preparation method of the flower-shaped acid iodide oxygen bismuth of highlight catalytic active
CN108479816A (en) * 2018-04-02 2018-09-04 常州大学 A kind of preparation method of high-effect iodine vacancy bismuth oxygen iodine catalysis material and the application in poisoning treatment of Organic Wastewater
CN108483494A (en) * 2018-02-27 2018-09-04 南京信息工程大学 A kind of nanometer thin sheet BiOI and the purposes as electrode material
CN108479817A (en) * 2018-03-13 2018-09-04 江苏建筑职业技术学院 A kind of preparation method for the high efficiency photocatalyst that width area of light absorbs
CN108786859A (en) * 2018-06-11 2018-11-13 上海电力学院 A kind of preparation method of carbon doping iodine oxygen bismuth acid iodide oxygen bismuth heterojunction structure
CN109160489A (en) * 2018-09-06 2019-01-08 新疆大学 A kind of method of solid state reaction synthesis acid iodide oxygen bismuth nanometer sheet
CN110586139A (en) * 2019-09-24 2019-12-20 湖南大学 Fe (III) cluster/bismuth oxyiodate composite photocatalytic material and preparation method and application thereof
CN110694667A (en) * 2019-11-08 2020-01-17 上海电力大学 BiOIO3/g-C3N4Heterojunction photocatalyst and preparation method and application thereof
CN110787817A (en) * 2019-11-08 2020-02-14 上海电力大学 Graphene-loaded bismuth oxyiodide photocatalyst and preparation method and application thereof
CN112264054A (en) * 2020-11-27 2021-01-26 上海电力大学 Preparation method of lamellar bismuth oxyiodate crystal material with high photocatalytic activity

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CN103435010A (en) * 2013-08-23 2013-12-11 山东大学 Preparation method of high-gloss catalytic-activity bismuth oxyiodide crystal
CN104801321A (en) * 2015-05-04 2015-07-29 上海电力学院 Preparation method of supported BiOIO3 photo-catalyst

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CN103435010A (en) * 2013-08-23 2013-12-11 山东大学 Preparation method of high-gloss catalytic-activity bismuth oxyiodide crystal
CN104801321A (en) * 2015-05-04 2015-07-29 上海电力学院 Preparation method of supported BiOIO3 photo-catalyst

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108249403A (en) * 2018-01-19 2018-07-06 上海电力学院 A kind of preparation method of the flower-shaped acid iodide oxygen bismuth of highlight catalytic active
CN108483494A (en) * 2018-02-27 2018-09-04 南京信息工程大学 A kind of nanometer thin sheet BiOI and the purposes as electrode material
CN108479817A (en) * 2018-03-13 2018-09-04 江苏建筑职业技术学院 A kind of preparation method for the high efficiency photocatalyst that width area of light absorbs
CN108479816A (en) * 2018-04-02 2018-09-04 常州大学 A kind of preparation method of high-effect iodine vacancy bismuth oxygen iodine catalysis material and the application in poisoning treatment of Organic Wastewater
CN108786859A (en) * 2018-06-11 2018-11-13 上海电力学院 A kind of preparation method of carbon doping iodine oxygen bismuth acid iodide oxygen bismuth heterojunction structure
CN109160489A (en) * 2018-09-06 2019-01-08 新疆大学 A kind of method of solid state reaction synthesis acid iodide oxygen bismuth nanometer sheet
CN109160489B (en) * 2018-09-06 2022-02-15 新疆大学 Method for synthesizing bismuth oxyiodate nanosheet through solid-phase chemical reaction
CN110586139A (en) * 2019-09-24 2019-12-20 湖南大学 Fe (III) cluster/bismuth oxyiodate composite photocatalytic material and preparation method and application thereof
CN110694667A (en) * 2019-11-08 2020-01-17 上海电力大学 BiOIO3/g-C3N4Heterojunction photocatalyst and preparation method and application thereof
CN110787817A (en) * 2019-11-08 2020-02-14 上海电力大学 Graphene-loaded bismuth oxyiodide photocatalyst and preparation method and application thereof
CN112264054A (en) * 2020-11-27 2021-01-26 上海电力大学 Preparation method of lamellar bismuth oxyiodate crystal material with high photocatalytic activity

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Application publication date: 20171215