CN104707628A - Bi2S3/Bi2MoO6 compound visible-light-induced photocatalyst as well as preparation method and application thereof - Google Patents

Bi2S3/Bi2MoO6 compound visible-light-induced photocatalyst as well as preparation method and application thereof Download PDF

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CN104707628A
CN104707628A CN201510090291.2A CN201510090291A CN104707628A CN 104707628 A CN104707628 A CN 104707628A CN 201510090291 A CN201510090291 A CN 201510090291A CN 104707628 A CN104707628 A CN 104707628A
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moo
catalyst
bi2moo6
preparation
bi2s3
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张海涛
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University of Jinan
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University of Jinan
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

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Abstract

The invention discloses a visible-light response Bi2S3/Bi2MoO6 compound photocatalyst and a preparation method thereof. The compound photocatalyst is formed by compounding Bi2S3 and Bi2MoO6 according to the mass ratio of (1:1) to (1:99). The preparation method comprises the following steps: weighing bismuth nitrate, dissolving in deionized water, performing ultrasonic dispersion until all the bismuth nitrate dissolves, adding thioacetamide, then adding Bi2MoO6, continuing stirring, adopting ammonium hydroxide to adjust the pH of the system to be 6-8, then continuing stirring, leaving the reaction product to stand, performing centrifugal separation, using deionized water to wash, drying to obtain powder of the compound photocatalyst, putting the powder in a crucible, putting the crucible in a muffle furnace, in the nitrogen atmosphere, heating the muffle furnace from the room temperature to 100-200 DEG C at the rate of 5 DEG C per minute, keeping the temperature for 4 h, and then, naturally cooling to the room temperature to obtain the Bi2S3/Bi2MoO6 compound photocatalyst. The Bi2S3/Bi2MoO6 compound photocatalyst prepared through the preparation method has better application prospect and economic benefit in sewage treatment.

Description

A kind of Bi 2s 3/ Bi 2moO 6composite visible light catalyst and preparation method and application
Technical field
The invention belongs to the technical field of material preparation and visible light photocatalysis, specifically relate to Bi 2s 3/ Bi 2moO 6the preparation of the composite visible light catalyst formed and the application of catalytic degradation organic pollutants under visible light thereof.
Background technology
Current environmental problem is day by day serious, causes the extensive attention in global range.Photocatalysis technology is then the potential desirable route of one solving environmental problem.Utilize photocatalysis technology environment purification to be one " green technology ", become the study hotspot of academia of various countries and industrial circle.Photochemical catalyst effectively can remove harmful substance and sterilization in air under ultraviolet or radiation of visible light, by pollutants such as VOCs(formaldehyde, benzene homologues, nitrogen oxide in air) direct oxidation resolves into water, carbon dioxide or other nontoxic material, can organic pollution (phenol, dyestuff etc.) in degradation water solution.At present with the titanium dioxide (TiO of stable chemical nature 2) be main study subject, its widely commercial Application be subject to very big restriction, main Problems existing is that solar energy utilization ratio is low, due to TiO 2band structure determine it and can only absorb ultraviolet part in sunshine, can not visible ray be absorbed.Enter the sunshine on earth's surface, be reach maximum radiant intensity near 500nm at visible wavelength, the energy of the visible-range of wavelength 400 ~ 750nm is 43% of whole solar energy.And the energy in the ultraviolet of below wavelength 400nm is less than 5%.Simultaneously because the separative efficiency in light induced electron-hole is lower, so therefore pure TiO 2often there is the lower problem of efficiency in actual applications.
Therefore, in order to effectively utilize sunshine spectrum, need exploitation also to have the photochemical catalyst of catalytic activity under visible light.Exploitation can utilize the photochemical catalyst of the visible light energy in solar spectrum, is the key solving a difficult problem in current photocatalysis technology.Present research method is transformed to from the catalysis material of design single-phase structure the composite construction constructing multiple semiconductor.
Summary of the invention
The object of the invention is to, overcome the deficiencies in the prior art, provide a kind of Bi 2s 3/ Bi 2moO 6the preparation method of composite visible light catalyst, and the catalytic performance studying its degradable organic pollutant under visible light.
By Bi 2moO 6effectively catch body and conductor as photo-generated carrier, and then improve the separative efficiency in light induced electron-hole, thus improve the activity of composite photo-catalyst.
The technical solution realizing the object of the invention is a kind of visible light-responded Bi 2s 3/ Bi 2moO 6composite photo-catalyst, its preparation process is as follows
The first step, bismuth nitrate is placed in deionized water for ultrasonic dispersion, its mass ratio 0.1:100-99:100, ultrasonic disperse is even.
Second step, adds ultrasonic disperse in the dispersion liquid of first step gained by bismuth molybdate, with the mass ratio 0.1:100-10:100 of deionized water, ultrasonic disperse is even.
3rd step, adds thioacetamide in the reaction system of second step, is 0.1:100-0.5:100 with the mass ratio of deionized water.
4th step, joins in the mixed liquor of the 3rd step gained by ammoniacal liquor, regulating pH to 6-8, and stir, is 0.1:100-1.5:100 with the mass ratio of deionized water.
5th step, centrifugation after the product of the 4th step gained is left standstill, spend deionized water, dry after powder under nitrogen atmosphere, calcine in Muffle furnace, Bi 2s 3/ Bi 2moO 6composite photo-catalyst.
The ultrasonic disperse time of described step 1 is 20-90 min.
The ultrasonic disperse time of described step 2 is 20-40 min
The mixing time of described step 4 is 20-30 min
The time of repose of described step 5 is 0.5 h-1 h.
The baking temperature of described step 5 is 30-50 DEG C, and drying time is 2-6 h.
The calcining heat of described step 5 is 100-200 DEG C, and calcination time is 2-4 h.
The present invention is compared with modern technologies, and its remarkable advantage is
(1) B is adopted i2moO 6for backing material, at its surface deposition Bi 2s 3particle, reduces Bi 2s 3the reunion probability of particle, provides larger specific area and more activated centre, thus improves light induced electron and be separated with the effective of hole, and then improves the activity of photochemical catalyst.
(2) Bi 2s 3/ Bi 2moO 6by simple heat treatment process, can be compounded to form heterojunction structure, its SEM is as shown in Fig. 1, and the having of heterojunction structure is beneficial to being separated of light induced electron and hole.
(3) this preparation method's process is simple, reagent cheap, can be used for a large amount of preparation.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope (SEM) photograph of catalyst described in embodiment 1.
Fig. 2 is Bi obtained by embodiment 2 2s 3/ Bi 2moO 6the activity figure of composite photo-catalyst.
Fig. 3 is Bi obtained by embodiment 3 2s 3/ Bi 2moO 6xRD figure before and after composite photo-catalyst reaction.
Below in conjunction with embodiment, the present invention is described in further details.
Detailed description of the invention
embodiment 1
A kind of visible-light response type Bi of the present invention 2s 3/ Bi 2moO 6composite photo-catalyst and preparation method thereof, comprises the following steps:
The first step, is placed in the dispersion of 50ml deionized water for ultrasonic, ultrasonic disperse 30 minutes by 0.379 bismuth nitrate.
Second step, adds ultrasonic disperse in the dispersion liquid of first step gained by 2.9g bismuth molybdate, ultrasonic disperse 20 minutes.
3rd step, adds in the dispersion liquid of second step by 0.093g thioacetamide, ultrasonic disperse 20 minutes.
4th step, just mass concentration is that the commerical grade ammoniacal liquor of 25-28% adds ammoniacal liquor and joins in the mixed liquor of the 3rd step gained, and constantly stirs, and tests pH, be adjusted to 7 with glass bar.
5th step, centrifugation after the product of the 4th step gained is left standstill 1h, spend deionized water, 30 degree of dryings after, gained powder under nitrogen atmosphere, 150 degree of calcinings in Muffle furnace, Bi 2s 3/ Bi 2moO 6composite photo-catalyst.
The Bi of Fig. 1 prepared by this example 1 2s 3/ Bi 2moO 6the SEM photo of composite photo-catalyst, as can be seen from Figure 1, Bi 2s 3uniform particles is distributed in Bi 2moO 6surface, defines good contact.And then improve the separative efficiency in light induced electron-hole, thus improve the activity of composite photo-catalyst.
embodiment 2
A kind of visible-light response type Bi of the present invention 2s 3/ Bi 2moO 6composite photo-catalyst and preparation method thereof, comprises the following steps
The first step, is placed in the dispersion of 50ml deionized water for ultrasonic, ultrasonic disperse 30 minutes by 0.793 bismuth nitrate.
Second step, adds ultrasonic disperse in the dispersion liquid of first step gained by 2.5g bismuth molybdate, ultrasonic disperse 20 minutes.
3rd step, adds in the dispersion liquid of second step by 0.33g thioacetamide, ultrasonic disperse 20 minutes.
4th step, just mass concentration is that the commerical grade ammoniacal liquor of 25-28% adds ammoniacal liquor and joins in the mixed liquor of the 3rd step gained, and constantly stirs, and tests pH, be adjusted to 7 with glass bar.
5th step, centrifugation after the product of the 4th step gained is left standstill 1h, spend deionized water, 35 degree of dryings after, gained powder under nitrogen atmosphere, 150 degree of calcinings in Muffle furnace, Bi 2s 3/ Bi 2moO 6composite photo-catalyst.
The Bi of Fig. 2 prepared by this example 2 2s 3/ Bi 2moO 6composite photo-catalyst is used for the Visible Light Induced Photocatalytic of the red B of Luo Ming in the aqueous solution, is the Luo Ming red B photocatalytic degradation curve map of 15mg/L to concentration; As can be seen from the figure, this composite photo-catalyst is after 8h irradiates, and the degradation rate of this photochemical catalyst to the red B of Luo Ming reaches 80%.Meanwhile, Bi 2moO 6under visible light conditions to concentration be the degradation rate of the red B of Luo Ming of 10 mg/L greatly about 30%, as can be seen here, the composite photo-catalyst synthesized by this example improves Bi significantly 2moO 6photocatalysis performance.
embodiment 3
A kind of visible-light response type Bi of the present invention 2s 3/ Bi 2moO 6composite photo-catalyst and preparation method thereof, comprises the following steps
The first step, is placed in the dispersion of 50ml deionized water for ultrasonic, ultrasonic disperse 30 minutes by 0.06g bismuth nitrate.
Second step, adds ultrasonic disperse in the dispersion liquid of first step gained by 3.9g bismuth molybdate, ultrasonic disperse 20 minutes.
3rd step, adds in the dispersion liquid of second step by 0.03g thioacetamide, ultrasonic disperse 20 minutes.
4th step, just mass concentration is that the commerical grade ammoniacal liquor of 25-28% adds ammoniacal liquor and joins in the mixed liquor of the 3rd step gained, and constantly stirs, and tests pH, be adjusted to 7 with glass bar.
5th step, centrifugation after the product of the 4th step gained is left standstill 1h, spend deionized water, 35 degree of dryings after, gained powder under nitrogen atmosphere, 200 degree of calcinings in Muffle furnace, Bi 2s 3/ Bi 2moO 6composite photo-catalyst.
Fig. 3 is Bi obtained by embodiment 3 2s 3/ Bi 2moO 6xRD collection of illustrative plates before and after composite photo-catalyst reaction; Bi can be found from figure 2moO 6characteristic peak, Bi 2s 3diffraction maximum very weak, may be because its content in composite photo-catalyst lower, reaction before and after xrd there is no significant change, prove that catalyst is more stable.

Claims (4)

1. a Bi 2s 3/ Bi 2moO 6composite visible light catalyst, is characterized in that: Bi in catalyst 2s 3/ Bi 2moO 6mass ratio be 1:1-1:99.
2. prepare the Bi as described in claim 1 for one kind 2s 3/ Bi 2moO 6the method of composite visible light catalyst, is characterized in that: comprise the following steps:
Take bismuth nitrate, be dissolved in deionized water, ultrasonic disperse, until all dissolve, adds Bi 2moO 6continue to stir, add appropriate thioacetamide, and regulate the pH value of this system to 6-8 with ammoniacal liquor;
Then continue to stir, product leaves standstill rear centrifugation, spends deionized water, after drying the powder of composite photo-catalyst puts into crucible, then crucible is put into Muffle furnace, in the atmosphere of nitrogen, 100-200 DEG C is raised to by room temperature with the speed of 5 DEG C/min, constant temperature 4 h, naturally cools to room temperature afterwards, obtains Bi 2s 3/ Bi 2moO 6composite photo-catalyst.
3. according to the Bi described in claim 2 2s 3/ Bi 2moO 6the preparation method of composite visible light catalyst, is characterized in that: in step (1), calcining heat is 100-200 DEG C.
4. the Bi as described in claim 1 2s 3/ Bi 2moO 6the application of composite visible light catalyst, is characterized in that: described catalyst is used for the visible light photocatalytic degradation of target contaminant in water.
CN201510090291.2A 2015-02-27 2015-02-27 Bi2S3/Bi2MoO6 compound visible-light-induced photocatalyst as well as preparation method and application thereof Pending CN104707628A (en)

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CN109395746A (en) * 2018-11-09 2019-03-01 济南大学 A kind of flexible-paper-base photochemical catalyst and preparation method thereof
CN109772369A (en) * 2019-02-27 2019-05-21 黑龙江大学 A kind of preparation method of bismuth molybdate/bismuth sulfide/molybdenum disulfide ternary photoelectrocatalysithin thin film material electrodes
CN111420681A (en) * 2020-04-16 2020-07-17 苏州大学 BMO/Bi2S3Composite photocatalyst, preparation method thereof and application thereof in reduction of hexavalent chromium
CN111558382A (en) * 2020-04-20 2020-08-21 齐齐哈尔大学 Preparation method and application of bismuth sulfide/bismuth molybdate oxygen-deficient hollow sphere composite photocatalyst
CN114602515A (en) * 2022-03-28 2022-06-10 王美珍 Photocatalyst for removing heavy metal in sewage and preparation method and application thereof
CN114939423A (en) * 2022-06-24 2022-08-26 武汉科技大学 Bi 4 Ti 3 O 12 /Bi 2 S 3 Piezoelectric photocatalyst and preparation method thereof
CN115350702A (en) * 2022-09-19 2022-11-18 中南大学 High-efficiency photocatalyst mullite bismuth manganate and preparation method and application thereof

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109395746A (en) * 2018-11-09 2019-03-01 济南大学 A kind of flexible-paper-base photochemical catalyst and preparation method thereof
CN109772369A (en) * 2019-02-27 2019-05-21 黑龙江大学 A kind of preparation method of bismuth molybdate/bismuth sulfide/molybdenum disulfide ternary photoelectrocatalysithin thin film material electrodes
CN109772369B (en) * 2019-02-27 2021-06-18 黑龙江大学 Preparation method of bismuth molybdate/bismuth sulfide/molybdenum disulfide ternary photoelectrocatalysis film material electrode
CN111420681A (en) * 2020-04-16 2020-07-17 苏州大学 BMO/Bi2S3Composite photocatalyst, preparation method thereof and application thereof in reduction of hexavalent chromium
CN111558382A (en) * 2020-04-20 2020-08-21 齐齐哈尔大学 Preparation method and application of bismuth sulfide/bismuth molybdate oxygen-deficient hollow sphere composite photocatalyst
CN111558382B (en) * 2020-04-20 2023-06-27 齐齐哈尔大学 Preparation method and application of bismuth sulfide/bismuth molybdate oxygen defect hollow sphere composite photocatalyst
CN114602515A (en) * 2022-03-28 2022-06-10 王美珍 Photocatalyst for removing heavy metal in sewage and preparation method and application thereof
CN114939423A (en) * 2022-06-24 2022-08-26 武汉科技大学 Bi 4 Ti 3 O 12 /Bi 2 S 3 Piezoelectric photocatalyst and preparation method thereof
CN115350702A (en) * 2022-09-19 2022-11-18 中南大学 High-efficiency photocatalyst mullite bismuth manganate and preparation method and application thereof

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Application publication date: 20150617