CN105502589A - Cr-SrTiO3 modified Ti-based PbO2 electrode and preparation method thereof - Google Patents
Cr-SrTiO3 modified Ti-based PbO2 electrode and preparation method thereof Download PDFInfo
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- CN105502589A CN105502589A CN201510863863.6A CN201510863863A CN105502589A CN 105502589 A CN105502589 A CN 105502589A CN 201510863863 A CN201510863863 A CN 201510863863A CN 105502589 A CN105502589 A CN 105502589A
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- srtio3
- electrode
- modified
- strontium titanate
- pbo2
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- YADSGOSSYOOKMP-UHFFFAOYSA-N lead dioxide Inorganic materials O=[Pb]=O YADSGOSSYOOKMP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 229910002370 SrTiO3 Inorganic materials 0.000 title abstract description 11
- 238000004070 electrodeposition Methods 0.000 claims abstract description 4
- IGFJNGLVIGYVQM-UHFFFAOYSA-N [Cr].[Sr] Chemical compound [Cr].[Sr] IGFJNGLVIGYVQM-UHFFFAOYSA-N 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 239000002105 nanoparticle Substances 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical group [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 7
- 238000012986 modification Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 15
- 239000013078 crystal Substances 0.000 abstract description 2
- 238000007747 plating Methods 0.000 abstract 4
- 230000004298 light response Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 229910002367 SrTiO Inorganic materials 0.000 description 30
- 238000006555 catalytic reaction Methods 0.000 description 11
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 230000001699 photocatalysis Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000007146 photocatalysis Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 3
- 238000013019 agitation Methods 0.000 description 3
- 239000011941 photocatalyst Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- 239000005642 Oleic acid Substances 0.000 description 2
- 239000010405 anode material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 2
- 229940012189 methyl orange Drugs 0.000 description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 2
- 235000006408 oxalic acid Nutrition 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- CASUWPDYGGAUQV-UHFFFAOYSA-M potassium;methanol;hydroxide Chemical compound [OH-].[K+].OC CASUWPDYGGAUQV-UHFFFAOYSA-M 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- STZCRXQWRGQSJD-UHFFFAOYSA-M sodium;4-[[4-(dimethylamino)phenyl]diazenyl]benzenesulfonate Chemical compound [Na+].C1=CC(N(C)C)=CC=C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-UHFFFAOYSA-M 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 150000003608 titanium Chemical class 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 229910006654 β-PbO2 Inorganic materials 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 101100496858 Mus musculus Colec12 gene Proteins 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002659 electrodeposit Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 230000005616 pyroelectricity Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 0.000 description 1
Classifications
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/26—Chromium
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
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- C02F2001/46142—Catalytic coating
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Abstract
The invention discloses a Cr-SrTiO3 modified Ti-based PbO2 electrode and a preparation method thereof. The Cr-SrTiO3 modified Ti-based PbO2 electrode comprises a base and a plating, wherein the base is a Ti base; the plating is made of Cr-SrTiO3 modified PbO2; the content of Cr-SrTiO3 in the plating is 5 to 12 wt%; the thickness of the plating is 0.2 to 1 mm; Beta-PbO2 is adopted. Modified by Cr-SrTiO3, Beta-PbO2 crystal grains obtained via electrodeposition are refined, so that the electrocatalytic property is improved. Moreover, the Cr-SrTiO3 modified Ti-based PbO2 electrode has visible light response, and can degrade organic substances via a photo-electro cooperation effect under the action of visible light, so that the sunlight utilization ratio is improved.
Description
Technical field
The present invention relates to a kind of ti-supported lead dioxide electric pole and preparation method thereof mixed chromium strontium titanate and modify.
Background technology
Photocatalysis technology and electrocatalysis technology even realize permineralization as the compound that the organic pollutant degradation in water can be environmental sound by important advanced oxidation, therefore receive people more and more to pay close attention to, light anode is the core of photoelectro-catalytic oxidation technology research.
DSA electrode, TiO
2β-the PbO of modification
2electrodes etc. have been used as anode material and have been studied, and demonstrate obvious concerted catalysis effect.But above-mentioned adopted electrode does not have or do not have visible light-responded, does not have visible light photocatalysis active at all, for photoelectric catalysis degrading organic pollutant, the utilization ratio of sunlight is low.
In order to make full use of sunlight, numerous photocatalyst with visible light catalysis activity is developed in recent years, the photocatalysis degradation organic contaminant activity that partially catalyzed agent display is higher.But the research with the electrode materials of visible light catalysis activity still compares the time, the electrode materials with photocatalytic activity has very weak or does not possess visible light catalysis activity.Therefore develop the anode material namely with visible light catalysis activity and have application prospect.
Summary of the invention
The technical problem that the present invention solves is that photoelectrocatalysis anode of the prior art does not possess visible light-responded, or visible light-responded not strong.
Technical scheme of the present invention is, a kind of ti-supported lead dioxide electric pole mixed chromium strontium titanate and modify is provided, described electrode comprises substrate and coating, described substrate is titanium substrate, coating is made up of the plumbic oxide mixing the modification of chromium strontium titanate, the content mixing chromium strontium titanate in coating is 5-12wt%, and the thickness of coating is 0.2-1mm, and described plumbic oxide is β-PbO
2.
Further, the content mixing the middle chromium element of chromium strontium titanate described in is 1-6wt%; Wherein wt% all represents mass percent.
Further, galvanic deposit is adopted to deposit in titanium substrate by described coating; Pb in the deposit fluid of described galvanic deposit
2+concentration is 0.2-0.5M, and the concentration of mixing chromium strontium titanate nanoparticles is 5-15g/L.
Further, the Cu also containing 0.005-0.015M in the deposit fluid of described galvanic deposit
2+.
Further, in described electrodeposition process, current density is 20-60mA/cm
2, stirring velocity is 300-600rpm, and temperature is 25-35 DEG C, galvanic deposit 1-3h.
SrTiO
3it is typical perofskite type oxide, there is high-k, low-dielectric loss, and excellent ferroelectric, the character such as piezoelectricity, pyroelectricity, be the critical function material preparing the various devices such as laminated ceramic capacitor, Nonvolatile ferroelectric random access memory, pressure transmitter, thermistor.The energy gap of strontium titanate is 3.2eV, is the TiO that continues
2another kind ofly afterwards be hopeful most the photocatalyst semiconductor material realizing practical application.Further, SrTiO
3fermi level relatively high, have and compare TiO
2higher photoelectricity gesture.β-PbO
2because of its there is good conductivity, erosion resistance is strong, cost is low, oxygen evolution potential advantages of higher and be usually used in electrocatalysis anode.
The present invention adopts the method for codeposition to prepare Cr-SrTiO
3the titanium base β-PbO of modified by nano particles
2electrode, this electrode can reduce the quick compound of current carrier by photoelectric-synergetic effect, to improve light-catalyzed reaction efficiency; And by Cr-SrTiO
3be fixed on electrode, solve the problem that photocatalyst reclaims difficulty; Meanwhile, SrTiO is passed through
3the doping of nano particle, also can play and improve β-PbO
2the effect of electrode electro catalytic activity, crystal grain thinning, raising binding force of cladding material and rotproofness.
SrTiO
3calcium nutrition structure make it have ionic replacement characteristic widely, make it possible to utilize doped transition metal ions to replace Sr, form suitable donor level or acceptor level, the sensitivity of light of semi-conductor is expanded in visible-range.The present invention is by carrying out Cr-SrTiO to common anode oxide electrode ti-supported lead dioxide electric pole
3(mixing chromium strontium titanate) modifies, and coating is had visible light-responded.
The present invention uses and mixes chromium SrTiO
3the ti-supported lead dioxide electric pole modified, as photo cathode, under visible light, realizes the efficient degradation to tropeolin-D by photoelectric-synergetic interaction energy.
The invention has the beneficial effects as follows, pass through Cr-SrTiO
3modification, make galvanic deposit gained β-PbO2 grain refining, improve its electrocatalysis characteristic.In addition, Cr-SrTiO
3the ti-supported lead dioxide electric pole modified has visible light-responded, can cross under visible ray effect, be degraded by photoelectric-synergetic effect to organism, improve sunlight utilization ratio.
Accompanying drawing explanation
Fig. 1 represents that strontium titanate contrasts figure with the XRD mixing chromium strontium titanate.
Fig. 2 represents the XRD figure of mixing the plumbic oxide that chromium strontium titanate is modified.
Fig. 3 represents that various smooth anode is to the comparison diagram of tropeolin-D clearance.
Fig. 4 represents the catalytic performance under the lead dioxide electrode different condition of mixing the modification of chromium strontium titanate.
Fig. 5 represents the stability of mixing the lead dioxide electrode catalysis that chromium strontium titanate is modified.
Embodiment
Further illustrate flesh and blood of the present invention with example, but embodiment is not construed as limiting the invention.
Synthesis SrTiO
3nanoparticle powder: by 5mLSrCl
26H
2o solution adds 8mLTi (OC lentamente under the condition of Keep agitation
3h
7)
4aqueous isopropanol in, add the solution of the potassium hydroxide methanol solution of 10mL2M, 1mL oleic acid and 1mL water subsequently; Hydrothermal method is used to react 5h at 200 DEG C gained solution; After cooling, collected the SrTiO generated by centrifugation
3nano particle, uses distilled water and washing with acetone 3 times respectively, then under 60 DEG C of vacuum, is dried to drying, for subsequent use.
Synthesis Cr-SrTiO3 nanoparticle powder: by Cr (NO
3)
39H
2o and SrCl
26H
2o is (1:10) by a certain percentage, gets 5mL solution and add 8mLTi (OC lentamente under the condition of Keep agitation
3h
7)
4aqueous isopropanol in, add the solution of the potassium hydroxide methanol solution of 10mL2M, 1mL oleic acid and 1mL water subsequently; Hydrothermal method is used to react 5h at 200 DEG C gained solution; After cooling, collected the SrTiO generated by centrifugation
3nano particle, uses distilled water and washing with acetone 3 times respectively, then under 60 DEG C of vacuum, is dried to drying, for subsequent use.
The SrTiO3 nanoparticle powder obtained and Cr-SrTiO
3as shown in Figure 1, the characteristic peak of bi-material does not have significant difference to the XRD result of nanoparticle powder, but can find out, after Cr doping, and SrTiO
3peak position there is certain deviation, Cr is described
3+part replaces SrTiO
3in Sr
2+.
Galvanic deposit: then according to the following steps pre-treatment is carried out to the titanium substrate cutting into 120 × 70 × 0.5mm: through 200 orders and 600 object sand paperings light after titanium substrate is first, then be soaked in the sodium hydroxide solution of 40%, be heated to 60 DEG C, cleaning 2h, be soaked in the oxalic acid solution of 15% after washing is clean, be heated to micro-boiling, 2h is to forming even numb gray face for etching, finally be stored in the oxalic acid solution of 1%, for subsequent use.
Cr-SrTiO
3nano-particle modified titanium base PbO
2electrode adopts the method preparation of coelectrodeposition: electrodeposit liquid composition and engineering condition is as follows:
Pb(NO
3)
20.4M
HNO
30.1M
NaF0.05M
Cu(NO
3)20.01M
Cr-SrTiO
3nano particle 10g/L
Temperature 30 DEG C
Current density 40mA/cm
2
Electrodeposition time 2h
Magnetic agitation speed 400rpm
The coating that galvanic deposit obtains is dusty blue, and light is smooth.
Cr-SrTiO
3nano-particle modified titanium base PbO
2the XRD figure of electrode is as shown in Figure 2: XRD analysis result shows to obtain β-PbO through galvanic deposit
2coating, doped with Cr-SrTiO on the coating obtained
3.
(difference is only: by Cr-SrTiO under identical condition
3nano particle is replaced) prepare TiO respectively
2, SrTiO
3the ti-supported lead dioxide electric pole modified, as a comparison.Respectively with TiO
2/ β-PbO
2, SrTiO
3/ β-PbO
2, Cr-SrTiO
3/ β-PbO
2three kinds of electrodes carry out photoelectrocatalysis experiment under visible light as light anode, degraded tropeolin-D.Methyl orange degradation experiment is carry out in the single-cell of 100mL at volume, and negative electrode is stainless steel electrode.Electrolyzer one side is furnished with quartz window, for reaction system introduces visible ray.Visible light source is the xenon lamp of 500W.By D.C. regulated power supply, constant voltage 5V is applied to system.Be that the 10mg/L methyl orange solution of 5 is as degraded target using pH.Acquired results Fig. 3.TiO can be found out
2/ β-PbO
2, SrTiO
3/ β-PbO
2the effect of photoelectrocatalysis methyl orange degradation is similar, reacts two hours, and the clearance of tropeolin-D is about 72%; And Cr-SrTiO
3/ β-PbO
2the degradation effect of electrode photo electrocatalysis tropeolin-D obviously increases, and react two hours, tropeolin-D clearance is up to 92.7%.
Select Cr-SrTiO
3/ β-PbO
2as anode, pH be 5 10mg/L methyl orange solution as degraded target, by contrast photochemical catalysis, electrocatalysis, photoelectric catalysis degrading effect, probe into Cr-SrTiO
3/ β-PbO
2the photoelectric-synergetic effect played.Experiment is carry out in the single-cell of 100mL at volume, and negative electrode is stainless steel electrode.Electrolyzer one side is furnished with quartz window, thinks that reaction system introduces visible ray.Visible light source is the xenon lamp of 500W.By D.C. regulated power supply, constant voltage 5V is applied to system.Result as shown in Figure 4, from result, gained Cr-SrTiO of the present invention
3/ β-PbO
2the independent photocatalysis performance of anode is not good, and the tropeolin-D photochemical catalysis clearance of 2h is only about 10%; Electrode electrocatalysis characteristic is better, and 2h tropeolin-D clearance can reach 82.3%; And under both acting in conjunction optical, electrical, Cr-SrTiO
3/ β-PbO
2electrode shows good photoelectric-synergetic effect, to the clearance of tropeolin-D at two hours up to 92.7%.
In addition, tested by the stability of six circulation experiments to the Cr-SrTiO3/ β-PbO2 light anode obtained by the present invention, (each experiment condition is consistent, and each group experiment is carried out continuously, and light anode is no longer lived again) result shows, Cr-SrTiO3/ β-PbO
2light anode uses 720 minutes continuously, and it still can maintain more than 90% to the clearance of tropeolin-D, has good stability.
Claims (5)
1. the ti-supported lead dioxide electric pole mixed chromium strontium titanate and modify, described electrode comprises substrate and coating, it is characterized in that, described substrate is titanium substrate, coating is made up of the plumbic oxide mixing the modification of chromium strontium titanate, the content mixing chromium strontium titanate in coating is 5-12wt%, and the thickness of coating is 0.2-1mm, and described plumbic oxide is β-PbO
2.
2. electrode as claimed in claim 1, is characterized in that, described in mix the middle chromium element of chromium strontium titanate content be 1-6wt%.
3. a preparation method for electrode as claimed in claim 1 or 2, is characterized in that, adopts galvanic deposit to deposit in titanium substrate by described coating; Pb in the deposit fluid of described galvanic deposit
2+concentration is 0.2-0.5M, and the concentration of mixing chromium strontium titanate nanoparticles is 5-15g/L.
4. preparation method as claimed in claim 3, is characterized in that, the Cu also containing 0.005-0.015M in the deposit fluid of described galvanic deposit
2+.
5. preparation method as claimed in claim 3, it is characterized in that, in described electrodeposition process, current density is 20-60mA/cm
2, stirring velocity is 300-600rpm, and temperature is 25-35 DEG C, galvanic deposit 1-3h.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417831A (en) * | 2008-11-11 | 2009-04-29 | 北京师范大学 | Novel ti-supported lead dioxide electric pole and preparation method thereof |
| CN102603037A (en) * | 2012-04-01 | 2012-07-25 | 南京工业大学 | Sunlight-assisted electro-catalysis organic wastewater treatment membrane reactor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417831A (en) * | 2008-11-11 | 2009-04-29 | 北京师范大学 | Novel ti-supported lead dioxide electric pole and preparation method thereof |
| CN102603037A (en) * | 2012-04-01 | 2012-07-25 | 南京工业大学 | Sunlight-assisted electro-catalysis organic wastewater treatment membrane reactor |
Non-Patent Citations (1)
| Title |
|---|
| 舒诗文等: "钛酸锶粉体功能材料的合成和应用研究进展", <材料导报> * |
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