Synthesis of TiO2 nanoparticles containing Fe, Si, and V using multiple diffusion flames and catalytic oxidation capability of carbon-coated nanoparticles

Handle URI:
http://hdl.handle.net/10754/596854
Title:
Synthesis of TiO2 nanoparticles containing Fe, Si, and V using multiple diffusion flames and catalytic oxidation capability of carbon-coated nanoparticles
Authors:
Ismail, Mohamed ( 0000-0003-4078-288X ) ; Memon, Nasir K.; Hedhili, Mohamed N. ( 0000-0002-3624-036X ) ; Anjum, Dalaver H.; Chung, Suk-Ho ( 0000-0001-8782-312X )
Abstract:
Titanium dioxide (TiO2) nanoparticles containing iron, silicon, and vanadium are synthesized using multiple diffusion flames. The growth of carbon-coated (C–TiO2), carbon-coated with iron oxide (Fe/C–TiO2), silica-coated (Si–TiO2), and vanadium-doped (V–TiO2) TiO2 nanoparticles is demonstrated using a single-step process. Hydrogen, oxygen, and argon are utilized to establish the flame, with titanium tetraisopropoxide (TTIP) as the precursor for TiO2. For the growth of Fe/C–TiO2 nanoparticles, TTIP is mixed with xylene and ferrocene. While for the growth of Si–TiO2 and V–TiO2, TTIP is mixed with hexamethyldisiloxane (HMDSO) and vanadium (V) oxytriisopropoxide, respectively. The synthesized nanoparticles are characterized using high-resolution transmission electron microscopy (HRTEM) with energy-filtered TEM for elemental mapping (of Si, C, O, and Ti), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), nitrogen adsorption BET surface area analysis, and thermogravimetric analysis. Anatase is the dominant phase for the C–TiO2, Fe/C–TiO2, and Si–TiO2 nanoparticles, whereas rutile is the dominant phase for the V–TiO2 nanoparticles. For C–TiO2 and Fe/C–TiO2, the nanoparticles are coated with about 3-5-nm thickness of carbon. The iron-based TiO2 nanoparticles significantly improve the catalytic oxidation of carbon, where complete oxidation of carbon occurs at a temperature of 470 °C (with iron) compared to 610 °C (without iron). Enhanced catalytic oxidation properties are also observed for model soot particles, Printex-U, when mixed with Fe/C-TiO2. With regards to Si–TiO2 nanoparticles, a uniform coating of 3 to 8 nm of silicon dioxide is observed around the TiO2 particles. This coating mainly occurs due to variance in the chemical reaction rates of the precursors. Finally, with regards to V–TiO2, vanadium is doped within the TiO2 nanoparticles as visualized by HRTEM and XPS further confirms the formation of V4+ and V5+ oxidation states.
KAUST Department:
Clean Combustion Research Center; Imaging and Characterization Core Lab
Citation:
Synthesis of TiO2 nanoparticles containing Fe, Si, and V using multiple diffusion flames and catalytic oxidation capability of carbon-coated nanoparticles 2016, 18 (1) Journal of Nanoparticle Research
Publisher:
Springer Science + Business Media
Journal:
Journal of Nanoparticle Research
Issue Date:
19-Jan-2016
DOI:
10.1007/s11051-016-3332-2
Type:
Article
ISSN:
1388-0764; 1572-896X
Additional Links:
http://link.springer.com/10.1007/s11051-016-3332-2
Appears in Collections:
Articles; Advanced Nanofabrication, Imaging and Characterization Core Lab; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorIsmail, Mohameden
dc.contributor.authorMemon, Nasir K.en
dc.contributor.authorHedhili, Mohamed N.en
dc.contributor.authorAnjum, Dalaver H.en
dc.contributor.authorChung, Suk-Hoen
dc.date.accessioned2016-02-21T10:08:38Zen
dc.date.available2016-02-21T10:08:38Zen
dc.date.issued2016-01-19en
dc.identifier.citationSynthesis of TiO2 nanoparticles containing Fe, Si, and V using multiple diffusion flames and catalytic oxidation capability of carbon-coated nanoparticles 2016, 18 (1) Journal of Nanoparticle Researchen
dc.identifier.issn1388-0764en
dc.identifier.issn1572-896Xen
dc.identifier.doi10.1007/s11051-016-3332-2en
dc.identifier.urihttp://hdl.handle.net/10754/596854en
dc.description.abstractTitanium dioxide (TiO2) nanoparticles containing iron, silicon, and vanadium are synthesized using multiple diffusion flames. The growth of carbon-coated (C–TiO2), carbon-coated with iron oxide (Fe/C–TiO2), silica-coated (Si–TiO2), and vanadium-doped (V–TiO2) TiO2 nanoparticles is demonstrated using a single-step process. Hydrogen, oxygen, and argon are utilized to establish the flame, with titanium tetraisopropoxide (TTIP) as the precursor for TiO2. For the growth of Fe/C–TiO2 nanoparticles, TTIP is mixed with xylene and ferrocene. While for the growth of Si–TiO2 and V–TiO2, TTIP is mixed with hexamethyldisiloxane (HMDSO) and vanadium (V) oxytriisopropoxide, respectively. The synthesized nanoparticles are characterized using high-resolution transmission electron microscopy (HRTEM) with energy-filtered TEM for elemental mapping (of Si, C, O, and Ti), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), nitrogen adsorption BET surface area analysis, and thermogravimetric analysis. Anatase is the dominant phase for the C–TiO2, Fe/C–TiO2, and Si–TiO2 nanoparticles, whereas rutile is the dominant phase for the V–TiO2 nanoparticles. For C–TiO2 and Fe/C–TiO2, the nanoparticles are coated with about 3-5-nm thickness of carbon. The iron-based TiO2 nanoparticles significantly improve the catalytic oxidation of carbon, where complete oxidation of carbon occurs at a temperature of 470 °C (with iron) compared to 610 °C (without iron). Enhanced catalytic oxidation properties are also observed for model soot particles, Printex-U, when mixed with Fe/C-TiO2. With regards to Si–TiO2 nanoparticles, a uniform coating of 3 to 8 nm of silicon dioxide is observed around the TiO2 particles. This coating mainly occurs due to variance in the chemical reaction rates of the precursors. Finally, with regards to V–TiO2, vanadium is doped within the TiO2 nanoparticles as visualized by HRTEM and XPS further confirms the formation of V4+ and V5+ oxidation states.en
dc.language.isoenen
dc.publisherSpringer Science + Business Mediaen
dc.relation.urlhttp://link.springer.com/10.1007/s11051-016-3332-2en
dc.rightsThe final publication is available at Springer via http://dx.doi.org/10.1007/s11051-016-3332-2en
dc.subjectFlame synthesisen
dc.subjectMultiple diffusion flamesen
dc.subjectTitanium dioxideen
dc.subjectCarbon oxidationen
dc.subjectNanoscale coatingen
dc.titleSynthesis of TiO2 nanoparticles containing Fe, Si, and V using multiple diffusion flames and catalytic oxidation capability of carbon-coated nanoparticlesen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentImaging and Characterization Core Laben
dc.identifier.journalJournal of Nanoparticle Researchen
dc.eprint.versionPost-printen
dc.contributor.institutionQatar Environment and Energy Research Institute (QEERI), HBKU, Qatar Foundation, Doha, Qataren
dc.contributor.institutionCollege of Science and Engineering, HBKU, Doha, Qataren
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorIsmail, Mohameden
kaust.authorHedhili, Mohamed N.en
kaust.authorAnjum, Dalaver H.en
kaust.authorChung, Suk-Hoen
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