CN105688925A - Visible-light response photocatalyst LiCu3SbMoO9 and preparing method thereof - Google Patents

Visible-light response photocatalyst LiCu3SbMoO9 and preparing method thereof Download PDF

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Publication number
CN105688925A
CN105688925A CN201610119281.1A CN201610119281A CN105688925A CN 105688925 A CN105688925 A CN 105688925A CN 201610119281 A CN201610119281 A CN 201610119281A CN 105688925 A CN105688925 A CN 105688925A
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photocatalyst
sbmoo
licu
visible
powder
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方清
方亮
孙宜华
李东升
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China Three Gorges University CTGU
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China Three Gorges University CTGU
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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
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85Chromium, molybdenum or tungsten
    • B01J23/88Molybdenum
    • B01J23/887Molybdenum containing in addition other metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/8876Arsenic, antimony or bismuth
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62DCHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D3/00Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
    • A62D3/10Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by subjecting to electric or wave energy or particle or ionizing radiation
    • A62D3/17Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by subjecting to electric or wave energy or particle or ionizing radiation to electromagnetic radiation, e.g. emitted by a laser
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/002Mixed oxides other than spinels, e.g. perovskite
    • B01J35/39
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2523/00Constitutive chemical elements of heterogeneous catalysts

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Abstract

The invention discloses a visible-light response photocatalyst LiCu3SbMoO9 wide in frequency and efficient and a preparing method of the visible-light response photocatalyst. The chemical constitution formula of the photocatalyst is LiCu3SbMoO9. The invention further discloses the preparing method of the material. The obtained photocatalyst has the advantages of being wide in spectral response range, high in light conversion efficiency, good in stability and the like, and has the effects of decomposing harmful chemical substances and organic biomass and carrying out disinfection under irradiation of visible light; in addition, the preparing method is simple, low in synthesis temperature and cost and suitable for industrial production and application.

Description

Visible light-responded photocatalyst Li Cu3SbMoO9And preparation method thereof
Technical field
The present invention relates to a kind of visible light-responded photocatalyst Li Cu3SbMoO9And preparation method thereof, belong to inorganic field of photocatalytic material。
Background technology
Along with socioeconomic development, people increasingly pay close attention to for the energy and ecological environment, solve energy shortage and problem of environmental pollution be realize sustainable development, improve people's living standard and safeguard national security in the urgent need to。
From phase late 1970s, there has been proposed and utilize in photocatalyst decomposition water and the Organic substance such as pesticide in air and odorant, and scribble the application example such as self-cleaning of the surface of solids of photocatalyst。The principle of light-catalyzed reaction is that photocatalyst is absorbing after higher than the photon of its band-gap energy, generates hole and electronics, and these holes and electronics carry out oxidation reaction and reduction reaction respectively, reaches to decompose the purpose of harmful chemical, organic-biological matter and sterilization。Photocatalyst has many kinds, and wherein most representative is titanium dioxide (TiO2), utilize titanium dioxide that the Organic substances such as the pesticide in water and in air and odorant are decomposed, but the band gap of titanium dioxide is 3.2eV, under the ultraviolet irradiation shorter than 400nm, only just can show activity, can only at indoor or the local work having uviol lamp, being little to utilize visible ray, this greatly limits the use of titanium dioxide optical catalyst。
Considering photocatalyst practicality in decomposing harmful substances, it is indispensable for utilizing sunlight as light source。Irradiate the sunlight medium wavelength maximum intensity of visible ray near 500nm to earth's surface, the energy that wavelength is the visible region of 400nm~750nm is about the 43% of sunlight gross energy, so for efficient utilization, the R and D of bismuth series photocatalyst have been achieved for a series of great achievement, bismuthous complex such as BiVO4、Bi2MoO6、Bi2Mo2O9、Bi2Mo3O12And Bi2WO4It is in the news and there is good absorption under visible light。A series of niobiums (tantalum) hydrochlorate photocatalyst is widely studied owing to having higher photocatalytic activity。Such as, niobate photocatalyst Pb3Nb4O13、BiNbO4And Bi2MNbO7(M=Al, Ga, In, Y, rare earth element and Fe) etc. and niobium potassium compound oxide photocatalyst such as KNbO3、KNb3O8、K4Nb6O17And K6Nb10.6O30Deng all having good photocatalysis performance, but its intrinsic photocatalytic effect is very weak or do not have activity in visible-range。
Although photocatalysis research has been carried out the several years, major part of exploring and develop to visible light-responded photocatalyst is the summary of experience drawn by great many of experiments at present, in theory also cannot from the crystal structure of compound, composition, the physicochemical properties such as molecular weight are predicted its photocatalysis performance, therefore at present report to have visible light-responded photocatalyst kind still very limited, and it is low to there is light conversion efficiency, synthesis difficulty, poor stability and the problem such as spectral response range is narrow, research and develop that new preparation method is simple and to have the visible light-responded high efficiency photocatalyst of wideband be that this area scientific and technical personnel thirst for solving always but are difficult to the difficult problem succeeded all the time, which greatly limits the extensive use of photocatalyst and development。We are to consisting of LiMg3SbMoO9、LiZn3SbMoO9And LiCu3SbMoO9Sample carried out Photocatalytic Performance Study。Found that LiCu3SbMoO9Band gap is 2.61eV, has the visible light-responded photocatalysis performance of excellence;LiMg3SbMoO9And LiZn3SbMoO9For insulator, under ultraviolet irradiation, do not show activity yet。
Summary of the invention
It is an object of the invention to provide and a kind of there is visible light-responded photocatalyst Li Cu3SbMoO9And preparation method thereof。
The chemical constitution formula with visible light-responded photocatalyst that the present invention relates to is: LiCu3SbMoO9
The preparation method of above-mentioned visible light-responded photocatalyst concretely comprises the following steps:
(1) by 99.9% analytically pure chemical raw material Li2CO3、CuO、Sb2O5And MoO3Starting powder press LiCu3SbMoO9Composition weigh dispensing。
(2) raw material mixing step (1) prepared, puts in ball grinder, adds zirconia ball and dehydrated alcohol, ball milling 8 hours, be mixed and finely ground, take out and dry, cross 200 mesh sieves。
(3) by the powder of step (2) mix homogeneously 950~1000 DEG C of pre-burnings, and it is incubated 6 hours, naturally cools to room temperature, then pass through ball mill pulverizing and make average diameter of particles diminish, lower than 2 μm, namely obtain LiCu3SbMoO9Powder。
Advantages of the present invention: LiCu3SbMoO9The visible light-responded wide frequency range of photocatalyst, light conversion efficiency height and good stability, have the effect decomposing harmful chemical, organic-biological matter and sterilization under visible light illumination;Additionally preparation method is simple, synthesis temperature is low, and cost is low, is suitable for commercial production and application。
Detailed description of the invention
Present invention will be described in detail below:
1, in order to obtain the composite oxides used in the present invention, prepare powder first by solid-phase synthesis, namely various oxides or the carbonate as raw material is measured ratio according to target constitutional chemistry and mixes, then synthesize in air atmosphere at ambient pressure。
2 in order to effectively utilize light, and the size of the photocatalyst in the present invention is preferably in micron level, or even nanoparticle, and specific surface area is bigger。The oxide powder prepared with solid-phase synthesis, its particle is relatively big and surface area is less, but can be by ball mill and pulverize means and make particle diameter diminish。
3, the photocatalysis experiment of the present invention is using methyl orange as simulation organic pollution, and its concentration is 20mg/L;Photocatalyst Li Cu3SbMoO9Addition be 1g/L;Light source uses the xenon lamp of 300W, and reactive tank uses the vessel that pyrex is made, and obtains the wavelength light more than 420nm by wave filter, then irradiates photocatalyst;Catalysis time is set as 60 minutes。
Embodiment 1:
(1) by 99.9% analytically pure chemical raw material Li2CO3、CuO、Sb2O5And MoO3Starting powder press LiCu3SbMoO9Composition weigh dispensing。
(2) raw material mixing step (1) prepared, puts in ball grinder, adds zirconia ball and dehydrated alcohol, ball milling 8 hours, be mixed and finely ground, take out and dry, cross 200 mesh sieves。
(3) by the powder of step (2) mix homogeneously 950 DEG C of pre-burnings, and it is incubated 6 hours, naturally cools to room temperature, then pass through ball mill pulverizing and make average diameter of particles diminish, lower than 2 μm, namely obtain LiCu3SbMoO9Powder。
Prepared photocatalyst, under the wavelength radiation of visible light more than 420nm, reaches 97.7% to methyl orange clearance in 60 minutes。
Embodiment 2:
(1) by 99.9% analytically pure chemical raw material Li2CO3、CuO、Sb2O5And MoO3Starting powder press LiCu3SbMoO9Composition weigh dispensing。
(2) raw material mixing step (1) prepared, puts in ball grinder, adds zirconia ball and dehydrated alcohol, ball milling 8 hours, be mixed and finely ground, take out and dry, cross 200 mesh sieves。
(3) by the powder of step (2) mix homogeneously 975 DEG C of pre-burnings, and it is incubated 6 hours, naturally cools to room temperature, then pass through ball mill pulverizing and make average diameter of particles diminish, lower than 2 μm, namely obtain LiCu3SbMoO9Powder。
Prepared photocatalyst, under the wavelength radiation of visible light more than 420nm, reaches 98.7% to methyl orange clearance in 60 minutes。
Embodiment 3:
(1) by 99.9% analytically pure chemical raw material Li2CO3、CuO、Sb2O5And MoO3Starting powder press LiCu3SbMoO9Composition weigh dispensing。
(2) raw material mixing step (1) prepared, puts in ball grinder, adds zirconia ball and dehydrated alcohol, ball milling 8 hours, be mixed and finely ground, take out and dry, cross 200 mesh sieves。
(3) by the powder of step (2) mix homogeneously 1000 DEG C of pre-burnings, and it is incubated 6 hours, naturally cools to room temperature, then pass through ball mill pulverizing and make average diameter of particles diminish, lower than 2 μm, namely obtain LiCu3SbMoO9Powder。
Prepared photocatalyst, under the wavelength radiation of visible light more than 420nm, methyl orange clearance is reached 98.3% by 60min。
The present invention is never limited to above example。The bound of each temperature, interval value can realize the present invention, embodiment numerous to list herein。
The made photocatalyst powder of above inventive embodiments can be carried on multiple matrix surface。Matrix can be glass, pottery, activated carbon or quartz sand etc., and photocatalyst can be carried on matrix surface in the form of a film。

Claims (1)

1. photocatalyst one kind visible light-responded, it is characterised in that the chemical constitution formula of described photocatalyst is LiCu3SbMoO9
The preparation method of described photocatalyst concretely comprises the following steps:
(1) by 99.9% analytically pure chemical raw material Li2CO3、CuO、Sb2O5And MoO3Starting powder press LiCu3SbMoO9Composition weigh dispensing;
(2) raw material mixing step (1) prepared, puts in ball grinder, adds zirconia ball and dehydrated alcohol, ball milling 8 hours, be mixed and finely ground, take out and dry, cross 200 mesh sieves;
(3) by the powder of step (2) mix homogeneously 950~1000 DEG C of pre-burnings, and it is incubated 6 hours, naturally cools to room temperature, then pass through ball mill pulverizing and make average diameter of particles lower than 2 μm, namely obtain LiCu3SbMoO9Powder。
CN201610119281.1A 2016-03-03 2016-03-03 Visible-light response photocatalyst LiCu3SbMoO9 and preparing method thereof Pending CN105688925A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63256531A (en) * 1987-04-15 1988-10-24 Natl Inst For Res In Inorg Mater Compound having hexagonal layer structure represented by infezn4o7 and production thereof
CN103111285A (en) * 2013-03-24 2013-05-22 桂林理工大学 Visible-light response vanadium composite oxide photocatalyst LiBiMo2O8 and preparation method thereof
CN104888760A (en) * 2015-05-23 2015-09-09 桂林理工大学 Visible-light-responded photocatalyst BaLiBiMo2O9 and preparation method thereof
CN105195128A (en) * 2015-10-10 2015-12-30 桂林理工大学 Visible-light response photocatalyst Li4Eu3Sb3O14 and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63256531A (en) * 1987-04-15 1988-10-24 Natl Inst For Res In Inorg Mater Compound having hexagonal layer structure represented by infezn4o7 and production thereof
CN103111285A (en) * 2013-03-24 2013-05-22 桂林理工大学 Visible-light response vanadium composite oxide photocatalyst LiBiMo2O8 and preparation method thereof
CN104888760A (en) * 2015-05-23 2015-09-09 桂林理工大学 Visible-light-responded photocatalyst BaLiBiMo2O9 and preparation method thereof
CN105195128A (en) * 2015-10-10 2015-12-30 桂林理工大学 Visible-light response photocatalyst Li4Eu3Sb3O14 and preparation method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HAIHANG CHEN ET AL.: "Enhanced Visible-Light Photoactivity of CuWO4 through a Surface Deposited CuO", 《J. PHYS. CHEM. C》 *
XIAOMING GAO ET AL.: "3D Hierarchical Microspheres of Cu-Doped Bi2WO6:Synthesis, Characterization, and Enhanced Photocatalytic Activity", 《JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE》 *

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Application publication date: 20160622