Photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation of titanium in 12-tungstosilicic acid
Samo za registrovane korisnike
2012
Autori
Stojadinović, Stevan D.J.Radić, Nenad
Vasilić, Rastko
Petkovic, M.
Stefanov, P.
Zekovic, Lj.
Grbić, Boško
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
In this paper, we have investigated photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation (PEO) of titanium in 12-tungstosilicic acid water solution and compared with photocatalytic activity of pure TiO2 coatings. The photocatalytic activity of the coatings is evaluated by measuring the degradation of methyl orange under simulated sunlight conditions. Photocatalytic activity of TiO2/WO3 coatings varied with duration of PEO process and higher photoactivity is obtained for a shorter process time. Photocatalytic activity of TiO2/WO3 coatings is related to morphology and phase and elemental composition of coatings. The oxide coatings morphology is strongly dependent on PEO time. The elemental components of the coatings are Ti, W and O. The oxide coatings are partly crystallized and mainly composed of WO3 and anatase. Decrease in the number of microdischarge channels and agglomeration of particles on the surface leads to a decrease in photocatalytic activity.... The reduction of the photocatalytic activity with increased time of PEO process is accompanied with the increase of WO3 concentration on the coatings' surface. Diffuse reflectance spectroscopy has shown that coatings enriched with tungsten oxide exhibit significant red shift with respect to the pure TiO2 coatings. TiO2/WO3 coatings with improved catalytic activity, compared to pure TiO2 coatings, are grouped around energy band gap of 2.6 eV. The results of PL measurements of TiO2/WO3 coatings are in agreement with photocatalytic activities. The increase of PL intensity corresponds to decrease of photocatalytic activity of the coatings, indicating fast recombination of electron-hole pairs.
Ključne reči:
Photocatalysis / Plasma electrolytic oxidation / TiO2/WO3 / TiO2Izvor:
Applied Catalysis B-Environmental, 2012, 126, 334-341Izdavač:
- Elsevier
Finansiranje / projekti:
- Grafitne i neorganske nanostrukture niske dimenzionalnosti (RS-171035)
- Razvoj efikasnijih hemijsko-inženjerskih procesa zasnovan na istraživanjima fenomena prenosa i principima intenzifikacije procesa (RS-172022)
- Hemijsko i strukturno dizajniranje nanomaterijala za primenu u medicini i inženjerstvu tkiva (RS-172026)
DOI: 10.1016/j.apcatb.2012.07.031
ISSN: 0926-3373
WoS: 000309692900037
Scopus: 2-s2.0-84865295514
Institucija/grupa
IHTMTY - JOUR AU - Stojadinović, Stevan D.J. AU - Radić, Nenad AU - Vasilić, Rastko AU - Petkovic, M. AU - Stefanov, P. AU - Zekovic, Lj. AU - Grbić, Boško PY - 2012 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/1134 AB - In this paper, we have investigated photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation (PEO) of titanium in 12-tungstosilicic acid water solution and compared with photocatalytic activity of pure TiO2 coatings. The photocatalytic activity of the coatings is evaluated by measuring the degradation of methyl orange under simulated sunlight conditions. Photocatalytic activity of TiO2/WO3 coatings varied with duration of PEO process and higher photoactivity is obtained for a shorter process time. Photocatalytic activity of TiO2/WO3 coatings is related to morphology and phase and elemental composition of coatings. The oxide coatings morphology is strongly dependent on PEO time. The elemental components of the coatings are Ti, W and O. The oxide coatings are partly crystallized and mainly composed of WO3 and anatase. Decrease in the number of microdischarge channels and agglomeration of particles on the surface leads to a decrease in photocatalytic activity. The reduction of the photocatalytic activity with increased time of PEO process is accompanied with the increase of WO3 concentration on the coatings' surface. Diffuse reflectance spectroscopy has shown that coatings enriched with tungsten oxide exhibit significant red shift with respect to the pure TiO2 coatings. TiO2/WO3 coatings with improved catalytic activity, compared to pure TiO2 coatings, are grouped around energy band gap of 2.6 eV. The results of PL measurements of TiO2/WO3 coatings are in agreement with photocatalytic activities. The increase of PL intensity corresponds to decrease of photocatalytic activity of the coatings, indicating fast recombination of electron-hole pairs. PB - Elsevier T2 - Applied Catalysis B-Environmental T1 - Photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation of titanium in 12-tungstosilicic acid VL - 126 SP - 334 EP - 341 DO - 10.1016/j.apcatb.2012.07.031 ER -
@article{ author = "Stojadinović, Stevan D.J. and Radić, Nenad and Vasilić, Rastko and Petkovic, M. and Stefanov, P. and Zekovic, Lj. and Grbić, Boško", year = "2012", abstract = "In this paper, we have investigated photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation (PEO) of titanium in 12-tungstosilicic acid water solution and compared with photocatalytic activity of pure TiO2 coatings. The photocatalytic activity of the coatings is evaluated by measuring the degradation of methyl orange under simulated sunlight conditions. Photocatalytic activity of TiO2/WO3 coatings varied with duration of PEO process and higher photoactivity is obtained for a shorter process time. Photocatalytic activity of TiO2/WO3 coatings is related to morphology and phase and elemental composition of coatings. The oxide coatings morphology is strongly dependent on PEO time. The elemental components of the coatings are Ti, W and O. The oxide coatings are partly crystallized and mainly composed of WO3 and anatase. Decrease in the number of microdischarge channels and agglomeration of particles on the surface leads to a decrease in photocatalytic activity. The reduction of the photocatalytic activity with increased time of PEO process is accompanied with the increase of WO3 concentration on the coatings' surface. Diffuse reflectance spectroscopy has shown that coatings enriched with tungsten oxide exhibit significant red shift with respect to the pure TiO2 coatings. TiO2/WO3 coatings with improved catalytic activity, compared to pure TiO2 coatings, are grouped around energy band gap of 2.6 eV. The results of PL measurements of TiO2/WO3 coatings are in agreement with photocatalytic activities. The increase of PL intensity corresponds to decrease of photocatalytic activity of the coatings, indicating fast recombination of electron-hole pairs.", publisher = "Elsevier", journal = "Applied Catalysis B-Environmental", title = "Photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation of titanium in 12-tungstosilicic acid", volume = "126", pages = "334-341", doi = "10.1016/j.apcatb.2012.07.031" }
Stojadinović, S. D.J., Radić, N., Vasilić, R., Petkovic, M., Stefanov, P., Zekovic, Lj.,& Grbić, B.. (2012). Photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation of titanium in 12-tungstosilicic acid. in Applied Catalysis B-Environmental Elsevier., 126, 334-341. https://doi.org/10.1016/j.apcatb.2012.07.031
Stojadinović SD, Radić N, Vasilić R, Petkovic M, Stefanov P, Zekovic L, Grbić B. Photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation of titanium in 12-tungstosilicic acid. in Applied Catalysis B-Environmental. 2012;126:334-341. doi:10.1016/j.apcatb.2012.07.031 .
Stojadinović, Stevan D.J., Radić, Nenad, Vasilić, Rastko, Petkovic, M., Stefanov, P., Zekovic, Lj., Grbić, Boško, "Photocatalytic properties of TiO2/WO3 coatings formed by plasma electrolytic oxidation of titanium in 12-tungstosilicic acid" in Applied Catalysis B-Environmental, 126 (2012):334-341, https://doi.org/10.1016/j.apcatb.2012.07.031 . .