Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites
Само за регистроване кориснике
2016
Аутори
Marković, SmiljaRajić, Vladimir B.
Stanković, Ana
Veselinović, Ljiljana
Belošević Čavor, Jelena
Batalović, Katarina
Abazović, Nadica
Škapin, Srečo Davor
Uskoković, Dragan
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
ZnO spheroidal nanoparticles, synthesized by microwave processing, were used for preparation of composites with polyethylene oxide (PEO). The phase purity and crystal structure of the composites were investigated by X-ray diffraction (XRD) and Raman spectroscopy. The composites’ particles morphology and size distributions were studied by FE-SEM and laser diffraction particle size analyzer, respectively. The optical properties were studied using UV–Vis diffuse reflectance and photoluminescence spectroscopy. It is found that in the wavelength range 550–800 nm, ZnO and ZnO/PEO composites absorb about 50% of the incident light intensity. Also red-shift of band gap energy (0.12–0.15 eV) compared to bulk ZnO was determined. The effect of PEO molecular weights, 200,000, 600,000 and 900,000 g/mol, on photocatalytic activity of ZnO/PEO composites were examined via de-colorization of methylene blue (MB) under direct sunlight irradiation. A large efficiency of MB de-colorization was found after 6... h of irradiation. The enhanced photocatalytic activity of ZnO/PEO composites is attributed to the: (1) lattice defects introduced in ZnO crystal structure by rapid microwave processing, and (2) presence of PEO as a source of oxygen interstitials. In order to confirm and further clarify the experimental results ab initio calculations based on density functional theory (DFT) were performed.
Кључне речи:
zinc oxide / microwave processing / PEO / heterogeneous photocatalysis / sunlight irradiation / methylene blueИзвор:
Solar Energy, 2016, 127, 124-135Издавач:
- Elsevier
Финансирање / пројекти:
- Молекуларно дизајнирање наночестица контролисаних морфолошких и физичко-хемијских карактеристика и функционалних материјала на њиховој основи (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45004)
- Наноструктурни мултифункционални материјали и нанокомпозити (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45018)
DOI: 10.1016/j.solener.2016.01.026
ISSN: 0038-092X
WoS: 000371942400012
Scopus: 2-s2.0-84956641632
Институција/група
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - JOUR AU - Marković, Smilja AU - Rajić, Vladimir B. AU - Stanković, Ana AU - Veselinović, Ljiljana AU - Belošević Čavor, Jelena AU - Batalović, Katarina AU - Abazović, Nadica AU - Škapin, Srečo Davor AU - Uskoković, Dragan PY - 2016 UR - https://dais.sanu.ac.rs/123456789/2317 AB - ZnO spheroidal nanoparticles, synthesized by microwave processing, were used for preparation of composites with polyethylene oxide (PEO). The phase purity and crystal structure of the composites were investigated by X-ray diffraction (XRD) and Raman spectroscopy. The composites’ particles morphology and size distributions were studied by FE-SEM and laser diffraction particle size analyzer, respectively. The optical properties were studied using UV–Vis diffuse reflectance and photoluminescence spectroscopy. It is found that in the wavelength range 550–800 nm, ZnO and ZnO/PEO composites absorb about 50% of the incident light intensity. Also red-shift of band gap energy (0.12–0.15 eV) compared to bulk ZnO was determined. The effect of PEO molecular weights, 200,000, 600,000 and 900,000 g/mol, on photocatalytic activity of ZnO/PEO composites were examined via de-colorization of methylene blue (MB) under direct sunlight irradiation. A large efficiency of MB de-colorization was found after 6 h of irradiation. The enhanced photocatalytic activity of ZnO/PEO composites is attributed to the: (1) lattice defects introduced in ZnO crystal structure by rapid microwave processing, and (2) presence of PEO as a source of oxygen interstitials. In order to confirm and further clarify the experimental results ab initio calculations based on density functional theory (DFT) were performed. PB - Elsevier T2 - Solar Energy T1 - Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites SP - 124 EP - 135 VL - 127 DO - 10.1016/j.solener.2016.01.026 UR - https://hdl.handle.net/21.15107/rcub_dais_2317 ER -
@article{ author = "Marković, Smilja and Rajić, Vladimir B. and Stanković, Ana and Veselinović, Ljiljana and Belošević Čavor, Jelena and Batalović, Katarina and Abazović, Nadica and Škapin, Srečo Davor and Uskoković, Dragan", year = "2016", abstract = "ZnO spheroidal nanoparticles, synthesized by microwave processing, were used for preparation of composites with polyethylene oxide (PEO). The phase purity and crystal structure of the composites were investigated by X-ray diffraction (XRD) and Raman spectroscopy. The composites’ particles morphology and size distributions were studied by FE-SEM and laser diffraction particle size analyzer, respectively. The optical properties were studied using UV–Vis diffuse reflectance and photoluminescence spectroscopy. It is found that in the wavelength range 550–800 nm, ZnO and ZnO/PEO composites absorb about 50% of the incident light intensity. Also red-shift of band gap energy (0.12–0.15 eV) compared to bulk ZnO was determined. The effect of PEO molecular weights, 200,000, 600,000 and 900,000 g/mol, on photocatalytic activity of ZnO/PEO composites were examined via de-colorization of methylene blue (MB) under direct sunlight irradiation. A large efficiency of MB de-colorization was found after 6 h of irradiation. The enhanced photocatalytic activity of ZnO/PEO composites is attributed to the: (1) lattice defects introduced in ZnO crystal structure by rapid microwave processing, and (2) presence of PEO as a source of oxygen interstitials. In order to confirm and further clarify the experimental results ab initio calculations based on density functional theory (DFT) were performed.", publisher = "Elsevier", journal = "Solar Energy", title = "Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites", pages = "124-135", volume = "127", doi = "10.1016/j.solener.2016.01.026", url = "https://hdl.handle.net/21.15107/rcub_dais_2317" }
Marković, S., Rajić, V. B., Stanković, A., Veselinović, L., Belošević Čavor, J., Batalović, K., Abazović, N., Škapin, S. D.,& Uskoković, D.. (2016). Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites. in Solar Energy Elsevier., 127, 124-135. https://doi.org/10.1016/j.solener.2016.01.026 https://hdl.handle.net/21.15107/rcub_dais_2317
Marković S, Rajić VB, Stanković A, Veselinović L, Belošević Čavor J, Batalović K, Abazović N, Škapin SD, Uskoković D. Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites. in Solar Energy. 2016;127:124-135. doi:10.1016/j.solener.2016.01.026 https://hdl.handle.net/21.15107/rcub_dais_2317 .
Marković, Smilja, Rajić, Vladimir B., Stanković, Ana, Veselinović, Ljiljana, Belošević Čavor, Jelena, Batalović, Katarina, Abazović, Nadica, Škapin, Srečo Davor, Uskoković, Dragan, "Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites" in Solar Energy, 127 (2016):124-135, https://doi.org/10.1016/j.solener.2016.01.026 ., https://hdl.handle.net/21.15107/rcub_dais_2317 .