Vanadium Pentoxide (V2O5): Kev Qhia Txog Kev Tshawb Fawb US, Catalysts thiab Roj Teeb
V2O5: Ib Daim Ntawv Qhia Txog Kev Ua Haujlwm rau US Laboratories, Catalyst Programs thiab Roj Teeb R&D
Los ntawm cov qauv siv lead ua thiab spectral identification mus rau industrial catalysis, lithium{0}}ion cathodes, gas sensors, thiab OSHA/EPA-ua raws kev tuav thiab kev yuav khoom.
Teb ceev
Vanadium pentoxide (VV2O5)yog lub +5 oxide ntawm vanadium: ib qho orthorhombic, txheej daj - mus rau - txiv kab ntxwv khoom (mp ~ 690℃) siv industrially ua tus catalyst rau SO2→ TSO3nyob rau hauv sulfuric acid ntau lawm thiab nyob rau hauv V2O5/TiO2NH3-SCR denitrification, thiab tshawb fawb dav dav li lithium-intercalation cathode (theoretical muaj peev xwm 294 mAh g−1ob Li+). Nyob rau hauv Teb Chaws Asmeskas nws raug tswj raws li ib tug tshuaj lom inhalation txaus ntshai: OSHA PEL 0.5 mg / m³ (respirable plua plav) / 0.1 mg / m³ (fume) raws li qab nthab, thiab nws ships liDOT UN 2862, Chav Kawm 6.1.
Cov ntsiab lus
- Physical & Chemical Properties
- Production & Synthesis
- Muaj Catalysis
- Roj teeb & Sensors
- Kev nyab xeeb, pov tseg & Kev yuav khoom
- FAQ
- Tau txais ib qho Quote
Physical & Chemical Properties thiab Analytical Characterization
Vanadium pentoxide muaj vanadium nyob rau hauv +5 oxidation xeev. Qhov ruaj khov ambient theem yog orthorhombic -V2O5(space groupPmmn, Tsis yog . 59), ua los ntawm ntug- thiab kaum- sib koom [VO5] square pyramids teem rau hauv cov ntawv txheej tuav los ntawm cov tsis muaj zog van der Waals rog. Cov khoom lag luam zoo li daj-rau- txiv kab ntxwv hmoov lossis tsaus nti- grey flakes. Cov compound yog sparingly soluble hauv dej (~ 0.9 g / L) thiab paramagnetic ntawm chav tsev kub.
- Qhov ntom
- 3.36-3.65 g / cm³
- Melting point
- ~ 670-690 degree
- Decomposition
- saum toj no ~ 1,750 degree
- Band qhov sib txawv
- ~ 2.2–2.3 eV
- Interlayer sib nrug
- ~4.4 Å
Unit cell parameters feem ntau yog a ≈ 11.51 Å, b ≈ 3.56 Å, c ≈ 4.37 Å. Lub interlayer sib nrug (~ 4.4 Å) thiab redox hloov tau thoob plaws V5+/V4+/V3+underpin nws cov tshuaj versatility: reversible reversible tshwm sim nyob rau hauv kev tswj tej yam kev mob, thaum sib sib zog nqus txo tshaj V4+tuaj yeem ua rau kev hloov pauv tsis hloov pauv.
| Cov txheej txheem | Diagnostic feature | Yam nqi |
|---|---|---|
| Hmoov XRD (Cu K) | Main 2θ reflections, JCPDS 41-1426 | 15.4℃(200), 20.3℃(001), 21.7℃(101), 26.1℃(110), 31.0℃(301), 32.4℃(011), 34.3℃(310) |
| Raman | Terminal V=O stretch | ~ 992 cm−1 |
| Raman | V-O-V asymmetric / symmetric stretches | 525 thiab 410 cm−1 |
| Raman | O–V=O khoov | ~ 286 cm−1 |
| XPS | V 2p3/2 (V5+) | ~517 ib |
| XPS | O 1s | ~530 eV |
Kev tsim khoom, Synthesis Methods thiab Conversion Pathways
Industrial V2O5feem ntau yog los ntawm titanomagnetite ores los yog vanadium -cov kabmob steel slags. Hauv qhov tseem ceeb alkaline- txoj kev roasting, slag hauv av (<100 µm) is mixed with sodium salts and roasted at 700–850 °C under oxidizing conditions to form water-soluble sodium orthovanadate:
Dej leaching, acidification, thiab ammonium nag lossis daus tawm los ammonium metavanadate, uas yog calcined rau siab -purity V2O5flake. Kev ntsuam xyuas cov qhab nia 98–99%, thaum siab - purity granular khoom ncav cuag Ntau dua lossis sib npaug li 99.6%. Ci kub thiab oxidation tswj yog cov txheej txheem tseem ceeb hloov pauv.
Lab-scale sol-gel raws tu qauv (piav qhia)
# Expected yield: ~75-90% phase-pure alpha-V2O5 1. Dissolve ammonium metavanadate in deionized water at 70 C 2. Acidify with oxalic acid ->tsaus -blue vanadium sol forms3. Tso nyiaj los ntawm spin- txheej (los yog cam khwb cia rau hauv gel) 4. Anneal hauv huab cua ntawm 450 C rau 2-3 teev
Hydrothermal synthesis (180-200 degree, 12-24 h) ua raws li annealing ua nanorods los yog nanosheets nrog txhim kho qhov chaw. Tswj pH, precursor concentration, thiab annealing ramp tus nqi yog qhov tseem ceeb rau lub hom phiaj particle loj thiab theem purity.
Thermal txo txoj kev
500-700 degree
800-1,000 degree
Doping nrog Cu, Fe, los yog Mn thiab tswj calcination cua tune crystallite loj, cheeb tsam nto, thiab defect ntom -tsis uas tswj downstream catalytic thiab electrochemical kev ua tau zoo. Calcination huab cua yuav tsum oxidizing kom tswj tau V5+oxidation xeev.
Muaj Catalytic Siv thiab Mechanistic Performance Data
V2O5yog lub hauv paus rau sulfuric acid ntau lawm ntawm SO2oxidation thiab xaiv catalytic txo (SCR) ntawm NOxnrog NH3.
| Txheej txheem | Catalyst | Qhov rai kub | Kev ua tau zoo |
|---|---|---|---|
| YOG2→ TSO3(kev sib cuag) | Alkali- txhawb V2O5silica/TiO2 | 400-600 degree | >95% hloov dua siab tshiab nyob rau hauv ntau- kis converters (ruaj ntseg) |
| NH3-SCR denitrification | V2O5/TiO2, 1–3 wt%V2O5, WO3/MoO3- txhawb nqa | 300-450 degree | 80-95% NOxhloov dua siab tshiab; N2 selectivity >95% (piv txwv: 500 ppm NO, 500 ppm NH3, 5% O2, GHSV ≈ 40,000 h−1) |
Nyob rau hauv txoj kev sib cuag, lub mechanism yuav redox cycling ntawm nto V5+thiab V4+hom, nrog lattice oxygen oxidizing adsorbed SO2thiab tom qab ntawd ntxiv los ntawm cov pa roj-theem O2.
Deactivation thiab regeneration.Txoj hauv kev ua kom tsis muaj zog tseem ceeb suav nrog alkali- hlau lom (K, Na los ntawm cov tshauv ya), arsenic deposition, sulfate tsub zuj zuj, thiab thermal sintering saum 500 degree. Regeneration ntawm acid ntxuav lossis tswj oxidation tuaj yeem rov ua haujlwm ib nrab; kev lag luam SCR catalyst lub neej feem ntau yog 2-5 xyoo ua ntej hloov lossis rov tsim dua tshiab.
Txhim kho kev ua si.Nanostructuring thiab kev txhawb nqa engineering nce active site ntom thiab redox kinetics. Dopants xws li Sb lossis Ce txuas rau qis -kub kev ua haujlwm thiab txhim kho SO2kam rau ua, uas yog qhov tseem ceeb rau siab -sulfur flue- roj siv.
Electrochemical, Roj Teeb thiab Kev Ntsuas Daim Ntawv Thov (Nanostructures & Thin Films)
Cov txheej txheem txheej ntawm -V2O5, nrog rau qhov sib nrug ntawm qhov sib txawv ntawm 4.4 Å, ua kom rov qab tau Li+intercalation, ua rau nws yog ib qho ntawm cov ntaub ntawv cathode feem ntau kawm dhau LiCoO2. Thaum tso tawm los ntawm 4.0 V, cov khoom hloov pauv raws li ε-Li0.5V2O5, δ-LiV2O5, and -Li2V2O5theem. Kev tso tawm hauv qab 2.0 V tsim ib qho kev hloov tsis tau ω-Li3V2O5theem, yog li lub tswv yim cycling qhov rais feem ntau txwv rau 4-2 V.
- Theoretical peev (1 Li+)
- 147 mAh g−1
- Theoretical peev (2 Li+)
- 294 mAh g−1
- Cycling qhov rais
- 4.0–2.0 V
- Tus nqi rau kev kuaj
- 0.1C (kev qhia)
Tsis zoo hluav taws xob conductivity thiab sluggish Li+diffusion limit bulk V2O5, tsav kev tshawb fawb rau hauv nanostructuring (nanowires, nanotubes, nanosheets), carbon composites (CNT, rGO), thiab nyias zaj duab xis tso los ntawm sputtering, pulsed laser deposition, CVD, los yog electrochemical deposition. Tshaj tawm nanostructured electrodes feem ntau xa tawm kwv yees li 150-300 mAh g−1ntawm tus nqi qis (0.1C), muaj peev xwm tuav tau nyob ib ncig ntawm 70-90% tshaj 100 cycles thiab Coulombic efficiency ze li ntawm 99% (piv txwv li los ntawm cov ntaub ntawv). Nanostructuring kuj pab kom haum raws li qhov ntim hloov pauv uas nrog kev rov ua dua thiab kev rho tawm, ntxiv txhim kho cov qauv kev ruaj ntseg.
V2O5nanostructures kuj ua hauj lwm raws li chemiresistive gas sensors. Adsorbed oxygen hom modulate nto conductivity; raug rau txo cov pa roj (NH3) los yog oxidizing gases (NO2) hloov tsis kam ntsuas ntawm ppb- mus rau -ppm concentrations. Cov khoom siv ib txwm ua haujlwm ntawm 150-300 degree, txawm hais tias qee qhov nanosheet sensors ua haujlwm ntawm chav tsev kub, ua kom cov zaub mov- lwj thiab tso tawm- saib xyuas daim ntawv thov.
Kev nyab xeeb, kev tswj hwm, kev cia khoom, pov tseg thiab kev qhia txog kev yuav khoom
| Txoj cai | Limit (as V2O5/vanadium) | Hom |
|---|---|---|
| OSHA PEL | 0.5 mg / m³ (ua pa tawm) / 0.1 mg / m³ (fume) | Qab nthab - yuav tsum tsis pub tshaj txhua lub sijhawm |
| NIOSH REL | 0.05 mg / m³ (raws li vanadium) | 15-feeb qab nthab |
| ACGIH TLV | 0.05 mg / m³ (qhov nqus tau feem) | 8-teev TWB |
| NIOSH IDLH | 35 mg/m³ | Tam sim ntawd txaus ntshai rau lub neej lossis kev noj qab haus huv |
Txhaum thiab raug.Rau kev nchuav, txwv kev nkag mus thiab ntxuav nrog HEPA lub tshuab nqus tsev lossis cov txheej txheem ntub dej -yeej tsis qhuav cheb. Txav mus rau cov neeg ua haujlwm raug mob rau huab cua ntshiab thiab nrhiav kev kho mob; vim muaj kev pheej hmoo ntawm kev ncua sij hawm pulmonary edema, kev soj ntsuam kev kho mob tom qab raug qhia tseem ceeb.Cia:khaws cov thawv kaw kom nruj rau hauv qhov chaw txias, qhuav kom deb ntawm cov khoom siv hluav taws xob thiab txo qis (V2O5yog incompatible nrog muaj zog acids, halogens, thiab alkali hlau).
Thauj thiab pov tseg. V2O5yog DOT cov khoom siv phom sij (UN 2862, Chav Kawm 6.1, ERG Guide 151). Cov khib nyiab yog tswj hwm los ntawm RCRA; V2O5Nws tseem yog CERCLA cov khoom muaj kev phom sij nrog 1,000-lb cov lus ceeb toom thiab raug rau EPCRA Tshooj 313 qhia. Nco ntsoov sab laj nrog SDS tam sim no thiab cov ntaub ntawv OSHA thiab EPA, raws li cov kev txwv tau hloov kho ib ntus.
Kev tsim khoom thiab QC.Cov qib lag luam feem ntau yog li ntawm 98% mus rau 99.6% purity. Thov COA npog cov khoom tsis huv, qhov loj me, thiab BET thaj chaw, thiab qhia meej meej purity, ntim, thiab ntim txhua hli thaum thov nqe lus.
Cov lus nug nquag
Paub meej tias orthorhombic -V2O5los ntawm hmoov XRD, nrog rau qhov tseem ceeb Cu K reflections ze 15.4 degree, 20.3 degree, thiab 26.1℃2θ (JCPDS 41-1426). Raman qhia lub davhlau ya nyob twg V=O ncab ze 992 cm−1; XPS muab V 2p3/2peak ze 517 eV.
Yuav ua li cas vanadium pentoxide feem ntau tsim nyob rau hauv industrial scale thiab dab tsi lab- nplai yields muaj tseeb?
Kev lag luam roasts vanadium- bearing slag nrog sodium ntsev ntawm 700-850℃, ces leaches, precipitates ammonium metavanadate, thiab calcines ntawm 500-700℃; Cov qhab nia kev xeem 98–99%. Lab sol-gel txoj kev feem ntau ncav cuag 75-90% yields (piav qhia).
Cov kauj ruam twg -los ntawm -PPE thiab cov txheej txheem xwm txheej ceev yuav tsum ua raws li lub chaw soj nstuam thaum tuav V2O5hmoov av los yog nchuav?
Ua hauj lwm nyob rau hauv lub hood fume nrog nitrile hnab looj tes thiab ib tug coverall; siv lub tshuab ua pa N100/P100 yog tias muaj plua plav tsim tau. Rau kev nchuav, txwv kev nkag mus thiab ntxuav nrog HEPA lub tshuab nqus tsev lossis cov txheej txheem ntub dej -tsis txhob qhuav cheb. Nrhiav kev kho mob rau qhov mob tsis tu ncua.
Yuav ua li cas V2O5ua raws li cov catalyst rau SO2oxidation thiab NH3-SCR, thiab kuv yuav tsum ceeb toom dab tsi?
Multi-pass SO2converters ua tiav 95% kev hloov pauv ntawm 400-600 degree; V2O5/TiO2SCR catalysts feem ntau ncav cuag 80-95% TSIS TAUxKev hloov pauv ntawm 300-450 degree. Qhia qhov ntsuas kub, GHSV, inlet concentrations, conversion, thiab N2xaiv xaiv.
Can V2O5siv lithium-ion roj teeb cathode thiab dab tsi yog cov peev txheej, lub neej voj voog, thiab cov qauv electrode?
Yog lawm. Lub peev xwm theoretical yog 294 mAh g−1ob Li+intercalations; Kev caij tsheb kauj vab feem ntau txwv rau 4-2 V kom tsis txhob hloov pauv hloov pauv. Nanostructured thiab carbon-composite electrodes feem ntau xa 150-300 mAh g−1ntawm tus nqi qis nrog 70-90% tuav tshaj li ntawm 100 lub voj voog (ib txwm), sib xyaw nrog cov pa roj carbon monoxide thiab PVDF binder.
Yuav tsum V2O5Cov khib nyiab raug muab cais tawm thiab muab pov tseg hauv Tebchaws Meskas, thiab kuv yuav tsum sab laj txog cov kev cai dab tsi?
V2O5yog CERCLA cov khoom muaj kev phom sij (1,000-lb cov lus ceeb toom kom muaj nuj nqis) raws li EPCRA Tshooj 313 qhia, nrog kev pov tseg tswj hwm los ntawm RCRA cov cai tswj hwm. Nrog koj tus SDS, EPA thiab DOT (UN 2862) qhov chaw, thiab lub xeev cov cai, txheeb xyuas cov ntaub ntawv raug cai tshiab.
Tau txais daim ntawv tso cai rau koj V2O5Kev xav tau
Xaiv qhov yog V2O5-txawm yog rau qhov kev pab cuam catalyst, kev tshawb fawb roj teeb, lossis kev lag luam khoom lag luam- nqes mus rau qib sib piv, qhov loj me, thiab qhov tshwj xeeb rau koj daim ntawv thov. Rub tawm peb daim ntawv ceev -cov ntaub ntawv hais txog cov khoom siv lub cev, cov yam ntxwv spectral peaks, thiab cov xwm txheej ntsuas catalytic, nrog rau kev npaj tau-rau- siv SDS template.
- Daim ntawv ceev -reference sheet: khoom, spectral peaks, catalytic test condition
- Npaj-rau- siv SDS template
- Kev sab laj kev cai rau lub rooj ntev zaum - kev tshawb fawb ntsuas, pilot batch, thiab bulk supply
Qhia rau peb koj cov kev txwv rau qhov kev tsocai tseeb:
Tsis paub meej tias qib twg haum rau koj cov txheej txheem? Xa koj daim ntawv thov lub hom phiaj, kev ua haujlwm, thiab cov kev xeem yuav tsum tau ua, thiab peb pab pawg kws tshaj lij yuav pom zoo ib qho kev qhia tshwj xeeb, kev xaiv ntim khoom, thiab cov phiaj xwm npaj khoom noj -nrog rau kev xa khoom raws (UN 2862) ua hauv.
Tiv tauj peb© 2026 Ferro Vanadium. Txhua txoj cai. Kev tswj hwm qhov tseem ceeb uas tau hais los ntawm kev tshaj tawm -ib txwm txheeb xyuas tawm tsam SDS tam sim no thiab cov ntaub ntawv raug cai.