Ultrasonic spray pyrolysis of surface modified TiO2 nanoparticles with dopamine
Nema prikaza
Autori
Dugandžić, IvanJovanović, Dragana J.
Mančić, Lidija
Milošević, Olivera
Ahrenkiel, Scott Phillip
Šaponjić, Zoran
Nedeljković, Jovan
Članak u časopisu
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Spherical, submicronic TiO2 powder particles were prepared in the low temperature process of ultrasonic spray pyrolysis (150 °C) by using as a precursor aqueous colloidal solutions consisting of surface modified 45 Å TiO2 nanoparticles with dopamine. Detailed structural and morphological characterization of colored submicronic TiO2 spheres was performed by X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), laser particle size analysis and FTIR techniques. Also, optical characterization of both dopamine-modified TiO2 precursor nanoparticles and submicronic TiO2 powder particles was performed using absorption and diffuse reflectance spectroscopy, respectively. A significant decrease of the effective band gap (1.9 eV) in dopamine-modified TiO2 nanoparticles compared to the band gap of bulk material (3.2 eV) was preserved after formation of submicronic TiO2 powder particles in the process of ultrasonic spray pyrolysis under mild exp...erimental conditions. Due to the nanostructured nature, surface-modified assemblage of TiO2 nanoparticles preserved unique ability to absorb light through charge transfer complex by photoexcitation of the ligand-to-TiO2 band, conventionally associated with extremely small TiO2 nanoparticles (d < 20 nm) whose surface Ti atoms, owing to the large curvature, have penta-coordinate geometry.
Ključne reči:
electron microscopy (STEM, TEM and SEM) / Fourier transform infrared spectroscopy / FTIR / ultrasonic techniques / TiO2Izvor:
Materials Chemistry and Physics, 2013, 233-239Finansiranje / projekti:
- Materijali redukovane dimenzionalnosti za efikasnu apsorpciju svetlosti i konverziju energije (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Dugandžić, Ivan AU - Jovanović, Dragana J. AU - Mančić, Lidija AU - Milošević, Olivera AU - Ahrenkiel, Scott Phillip AU - Šaponjić, Zoran AU - Nedeljković, Jovan PY - 2013 UR - http://dais.sanu.ac.rs/123456789/344 UR - https://vinar.vin.bg.ac.rs/handle/123456789/7409 AB - Spherical, submicronic TiO2 powder particles were prepared in the low temperature process of ultrasonic spray pyrolysis (150 °C) by using as a precursor aqueous colloidal solutions consisting of surface modified 45 Å TiO2 nanoparticles with dopamine. Detailed structural and morphological characterization of colored submicronic TiO2 spheres was performed by X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), laser particle size analysis and FTIR techniques. Also, optical characterization of both dopamine-modified TiO2 precursor nanoparticles and submicronic TiO2 powder particles was performed using absorption and diffuse reflectance spectroscopy, respectively. A significant decrease of the effective band gap (1.9 eV) in dopamine-modified TiO2 nanoparticles compared to the band gap of bulk material (3.2 eV) was preserved after formation of submicronic TiO2 powder particles in the process of ultrasonic spray pyrolysis under mild experimental conditions. Due to the nanostructured nature, surface-modified assemblage of TiO2 nanoparticles preserved unique ability to absorb light through charge transfer complex by photoexcitation of the ligand-to-TiO2 band, conventionally associated with extremely small TiO2 nanoparticles (d < 20 nm) whose surface Ti atoms, owing to the large curvature, have penta-coordinate geometry. T2 - Materials Chemistry and Physics T1 - Ultrasonic spray pyrolysis of surface modified TiO2 nanoparticles with dopamine SP - 233 EP - 239 UR - https://hdl.handle.net/21.15107/rcub_vinar_7409 ER -
@article{ author = "Dugandžić, Ivan and Jovanović, Dragana J. and Mančić, Lidija and Milošević, Olivera and Ahrenkiel, Scott Phillip and Šaponjić, Zoran and Nedeljković, Jovan", year = "2013", abstract = "Spherical, submicronic TiO2 powder particles were prepared in the low temperature process of ultrasonic spray pyrolysis (150 °C) by using as a precursor aqueous colloidal solutions consisting of surface modified 45 Å TiO2 nanoparticles with dopamine. Detailed structural and morphological characterization of colored submicronic TiO2 spheres was performed by X-ray powder diffraction (XRPD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), laser particle size analysis and FTIR techniques. Also, optical characterization of both dopamine-modified TiO2 precursor nanoparticles and submicronic TiO2 powder particles was performed using absorption and diffuse reflectance spectroscopy, respectively. A significant decrease of the effective band gap (1.9 eV) in dopamine-modified TiO2 nanoparticles compared to the band gap of bulk material (3.2 eV) was preserved after formation of submicronic TiO2 powder particles in the process of ultrasonic spray pyrolysis under mild experimental conditions. Due to the nanostructured nature, surface-modified assemblage of TiO2 nanoparticles preserved unique ability to absorb light through charge transfer complex by photoexcitation of the ligand-to-TiO2 band, conventionally associated with extremely small TiO2 nanoparticles (d < 20 nm) whose surface Ti atoms, owing to the large curvature, have penta-coordinate geometry.", journal = "Materials Chemistry and Physics", title = "Ultrasonic spray pyrolysis of surface modified TiO2 nanoparticles with dopamine", pages = "233-239", url = "https://hdl.handle.net/21.15107/rcub_vinar_7409" }
Dugandžić, I., Jovanović, D. J., Mančić, L., Milošević, O., Ahrenkiel, S. P., Šaponjić, Z.,& Nedeljković, J.. (2013). Ultrasonic spray pyrolysis of surface modified TiO2 nanoparticles with dopamine. in Materials Chemistry and Physics, 233-239. https://hdl.handle.net/21.15107/rcub_vinar_7409
Dugandžić I, Jovanović DJ, Mančić L, Milošević O, Ahrenkiel SP, Šaponjić Z, Nedeljković J. Ultrasonic spray pyrolysis of surface modified TiO2 nanoparticles with dopamine. in Materials Chemistry and Physics. 2013;:233-239. https://hdl.handle.net/21.15107/rcub_vinar_7409 .
Dugandžić, Ivan, Jovanović, Dragana J., Mančić, Lidija, Milošević, Olivera, Ahrenkiel, Scott Phillip, Šaponjić, Zoran, Nedeljković, Jovan, "Ultrasonic spray pyrolysis of surface modified TiO2 nanoparticles with dopamine" in Materials Chemistry and Physics (2013):233-239, https://hdl.handle.net/21.15107/rcub_vinar_7409 .