CN104495972A - Application of arsenic sulfide - Google Patents

Application of arsenic sulfide Download PDF

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Publication number
CN104495972A
CN104495972A CN201410743232.6A CN201410743232A CN104495972A CN 104495972 A CN104495972 A CN 104495972A CN 201410743232 A CN201410743232 A CN 201410743232A CN 104495972 A CN104495972 A CN 104495972A
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CN
China
Prior art keywords
photocatalyst
arsenous
sulfuration
application
organic dye
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CN201410743232.6A
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Chinese (zh)
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CN104495972B (en
Inventor
汤建庭
李大塘
封朝霞
范超
袁芳芳
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Hunan University of Science and Technology
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Hunan University of Science and Technology
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Priority to CN201410743232.6A priority Critical patent/CN104495972B/en
Publication of CN104495972A publication Critical patent/CN104495972A/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
    • B01J27/04—Sulfides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/308—Dyes; Colorants; Fluorescent agents

Abstract

The invention discloses application of arsenic sulfide. Arsenic sulfide is used as a photocatalyst to degrade organic dye pollutants, thereby expanding the range of applications. The activity of arsenic sulfide in photocatalytic degradation of the organic dye pollutants, such as rhodamine B dye, is obviously higher than that of titanium dioxide P25 and is also higher than that of a high-activity Ag3PO4 photocatalyst. Arsenic sulfide disclosed by the invention has the advantages of high photocatalyst activity, simple preparation method and mild preparation conditions, and is conductive to popularization and application.

Description

The application of sulfuration arsenous
Technical field
The invention belongs to the photocatalysis technology field in environmental improvement, relate to sulfuration arsenous as the application of a kind of novel photocatalyst in degradating organic dye pollutent.
Background technology
At present, global printing and dyeing industry size constantly expands, a large amount of organic dye pollutant that this industry is discharged, and has become the important sources of whole world water pollutions.Photocatalitic Technique of Semiconductor can at room temperature directly utilize sunlight by dyestuff contaminant oxidative degradation efficiently or elimination.Therefore, by photocatalysis technology, make full use of sunlight and carry out the beneficial way that degradation of dye pollutent is current water pollution control.Because UV-light only accounts for about 4% of sunlight total energy, and visible ray accounts for about 46%, so utilize the key of sun power to be the visible ray utilized in sunlight by photocatalysis technology.Therefore, the photocatalyst (abbreviation visible light catalyst) that can absorb visible ray has important application prospect in current field of environmental improvement.
Because photo-generated carrier recombination rate high in photocatalytic process, adds the restriction of energy band structure, the activity of visible light catalyst degradation of dye pollutent is general lower.Document (Z.Yi, et al.Nature Materials, 2010,9,559 – 564) is reported, Ag 3pO 4can be used as the degraded of photocatalyst for organic dye pollutant under visible ray, its activity is far above BiVO 4, AgBr, AgI and N-TiO 2etc. common visible light catalyst.Development is active in Ag 3pO 4novel photocatalyst, there is larger challenge.
Sulfuration arsenous has another name called arsenic trisulfide, and chemical formula is As 2s 3, being yellow crystalline powder, is the main component of orpiment ore.Record according to Shennong's Herbal, Compendium of Material Medica, a kind of Chinese medicine of orpiment Zeng Zuowei, plays the effects such as desinsection, removing toxic substances, detumescence.In the modern times, As 2s 3mainly for the manufacture of arsenic and arsenic compound.At present, patent and bibliographical information is not yet had by As 2s 3the degraded of pollutent is used for as photocatalyst.
Summary of the invention
The object of the invention is to provide sulfuration arsenous (As 2s 3) at a kind of new opplication of field of environmental improvement, thus widen its range of application.
Technical scheme of the present invention is:
An application for sulfuration arsenous, sulfuration arsenous is as photocatalyst for degrading organic dye pollutant, and the step of embody rule is:
(1) under room temperature (20-25 DEG C), irradiating with visible ray, take organic dye pollutant as substrate, with sulfuration arsenous for photocatalyst carries out photocatalytic degradation;
(2) activity rating of sulfuration arsenous photocatalyst: the degradation rate measuring organic dye pollutant, weighed with its degradable required time.
The application of above-mentioned sulfuration arsenous, described organic dye pollutant is preferably rhodamine B.
The application of above-mentioned sulfuration arsenous, the wavelength of described visible ray is greater than 420nm.
Beneficial effect of the present invention is:
(1) experimental result shows, As 2s 3photocatalytic activity apparently higher than commercial titanium dioxide P25, also higher than highly active Ag 3pO 4photocatalyst, solves the active low problem of existing photocatalyst for degrading.
(2) As of the present invention 2s 3photocatalyst preparation method is simple, preparation condition is gentle, is conducive to applying.
Accompanying drawing explanation
As prepared by Fig. 1 embodiment of the present invention 2s 3the SEM figure of photocatalyst.
As prepared by Fig. 2 embodiment of the present invention 2s 3the powder X-ray RD figure of photocatalyst.
Fig. 3 is As prepared by the embodiment of the present invention 2s 3the UV-Vis DRS spectrogram of photocatalyst.
Fig. 4 is As prepared by the embodiment of the present invention 2s 3, and P25 and Ag 3pO 4the Activity Results figure of photocatalyst for degrading rhdamine B.Wherein, C 0for photocatalyst adds the starting point concentration of front rhodamine B, namely 12.0mg/L, C are the concentration of rhodamine B under any instant in photocatalytic process.
Embodiment
Here is As of the present invention 2s 3the specific embodiment of applied research, following examples are intended to further describe the present invention, and unrestricted the present invention.
(1) As 2s 3preparation:
Get the Na that 2mL concentration is 2.6mol/L 2hAsO 3solution mixes with 70mL deionized water, then adds the hydrochloric acid that 2mL concentration is 36wt%, obtains arsenic precursor solution; Get the Na of 1.9g 2s9H 2o is dissolved in the deionized water of 70mL, obtains sulphur precursor solution.At room temperature, mixed by arsenic precursor solution with sulphur precursor solution, centrifugation after lucifuge stirring 2h, is precipitated.At being deposited in 60 DEG C, dry 5h, obtains As 2s 3sample.
(2) As 2s 3sign:
As seen from Figure 1, As 2s 3there is the random granule-morphology being of a size of 1 – 20 μm.Fig. 2 shows, As 2s 3the crystalline phase of sample and the standard A s of JCPDS No.19-0084 in " powdery diffractometry card set " 2s 3crystalline phase is coincide, and this illustrates As 2s 3sample is successfully prepared.As seen from Figure 3, As 2s 3the energy of absorption edge of sample is at about 550nm, and this shows As 2s 3being a kind of semi-conductor that can absorb visible ray in essence, is a kind of potential visible light catalyst.
(3) As 2s 3activity rating as photocatalyst for degrading rhdamine B pollutent:
By gained As 2s 3sample for degraded substrate, carries out photocatalytic activity evaluation with rhodamine B (the representative dyestuff contaminant of difficult degradation), and by its Activity Results and P25 and Ag 3pO 4contrast.
Photocatalytic activity testing scheme is: 75mg photocatalyst is placed in the rhodamine B solution (splendid attire is in the uncovered beaker of 500mL) that 100mL concentration is 12mg/L, under room temperature, lucifuge stirs 40min, makes rhodamine molecule reach Xi Fu – desorption equilibrium in photocatalyst surface.Then open 500W xenon lamp (PLS-SXE300, Beijing Bo Feilai Science and Technology Ltd.), with the light of spectral filter elimination wavelength lower than 420nm, rhodamine B liquid level of solution is positioned at immediately below xenon lamp, and the distance between liquid level and fluorescent tube center is 14cm.Respectively in different time points sampling, after centrifugation, get supernatant liquor, supernatant liquor dilution is obtained sample.The absorbancy of sample at 553nm place is measured with ultraviolet spectrophotometer (Lambda 35, PerkinElmer company of the U.S.).The rhodamine B concentration of sample is finally calculated according to concentration-absorbance standard curve.
As seen from Figure 4, As 2s 3photocatalyst is degradable by rhodamine B within 15min, Ag 3pO 4degradablely need 25min, even if the efficiency of P25 rhodamine B degradation in 120min is also very low.As can be seen here, As 2s 3the activity of photocatalyst is apparently higher than P25 and Ag 3pO 4.Therefore, As 2s 3it is a kind of high-activity visible light catalyst of degradation of dye pollutent.

Claims (3)

1. an application for sulfuration arsenous, is characterized in that, sulfuration arsenous is as photocatalyst for degrading organic dye pollutant, and the step of embody rule is:
(1) at room temperature, irradiating with visible ray, take organic dye pollutant as substrate, with sulfuration arsenous for photocatalyst carries out photocatalytic degradation;
(2) activity rating of sulfuration arsenous photocatalyst: the degradation rate measuring organic dye pollutant, weighed with its degradable required time.
2. the application of sulfuration arsenous according to claim 1, is characterized in that: described organic dye pollutant is rhodamine B.
3. the application of sulfuration arsenous according to claim 1, is characterized in that: the wavelength of described visible ray is greater than 420nm.
CN201410743232.6A 2014-12-08 2014-12-08 The application of sulfuration arsenous Expired - Fee Related CN104495972B (en)

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CN104495972B CN104495972B (en) 2016-08-17

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5866752A (en) * 1997-09-29 1999-02-02 Goozner; Robert E. Destruction of volatile organic carbons
CN1613750A (en) * 2004-09-24 2005-05-11 武汉大学 Preparation for metal sulfide
WO2010000798A1 (en) * 2008-07-04 2010-01-07 Unilever Plc Waste water treatment
CN101863524A (en) * 2010-06-11 2010-10-20 苏州大学 Photocatalytic oxidation degradation method of wastewater containing dye
WO2014099842A1 (en) * 2012-12-20 2014-06-26 Sunpower Technologies Llc Photo-catalytic systems for the production of hydrogen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5866752A (en) * 1997-09-29 1999-02-02 Goozner; Robert E. Destruction of volatile organic carbons
CN1613750A (en) * 2004-09-24 2005-05-11 武汉大学 Preparation for metal sulfide
WO2010000798A1 (en) * 2008-07-04 2010-01-07 Unilever Plc Waste water treatment
CN101863524A (en) * 2010-06-11 2010-10-20 苏州大学 Photocatalytic oxidation degradation method of wastewater containing dye
WO2014099842A1 (en) * 2012-12-20 2014-06-26 Sunpower Technologies Llc Photo-catalytic systems for the production of hydrogen

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