Статья

Structure phase-dependent dielectric and photodegradation properties of Co-doped TiO2 nanoparticles synthesized via co-precipitation route

Kashif SafeenDepartment of Physics, Abdul Wali Khan University Mardan 23200, PakistanRehan UllahDepartment of Physics, Abdul Wali Khan University Mardan 23200, PakistanAkif SafeenDepartment of Physics, University of Poonch Rawalakot, AJK, Pakistan 12350Syed ZulfiqarDepartment of Physics, Abdul Wali Khan University Mardan 23200, PakistanMuhammad KabeerDepartment of Physics, Abdul Wali Khan University Mardan 23200, PakistanSattam Al OtaibiDepartment of Physics, University of Lakki Marwat, PakistanHayat UllahMaterial Modeling and Simulation Laboratory, Department of Physics, Women University of Azad Jammu & Kashmir, Bagh, PakistanAbid ZamanDepartment of Physics, Riphah International University Islamabad 44000, PakistanKhawaja Shafique AhmadDepartment of Botany, University of Poonch Rawalakot, AJK, 12350, PakistanMuhammad Zia Ullah ShahFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaHosam O. ElansaryDepartment of Plant Production, College of Food & Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi ArabiaIhab Mohamed MoussaDepartment of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi ArabiaRyan CasiniSchool of Public Health, University of California, Berkeley, 2121 Berkeley Way, Berkeley, CA 94704, USAEman A. MahmoudDepartment of Food Industries, Faculty of Agriculture, Damietta University, Damietta, Egypt

2023en

ABI

Аннотация

This research pursued the effect of various calcination temperatures (300-1000 °C) on developing structural phases and the optical, dielectric, and photodegradation characteristics of cobalt-doped titanium dioxide nanoparticles (TiO2 NPs). The prepared NPs were characterized using X-ray diffraction (XRD), scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM-EDX), Fourier transform infrared (FTIR) spectroscopy analysis, ultraviolet-visible light (UV-VIS) spectroscopy, and photodegradation of methylene blue in the presence of visible light. XRD analysis revealed the formation of a tetragonal anatase phase for the samples calcined at 300-600 °C, while the Co-doped samples calcined at 800 °C and 1000 °C displayed a tetragonal rutile phase. The optical band gap analysis indicated that doping in the host matrix produced lower band gap energy for all the prepared samples. Dielectric measurements showed that the rutile phase heated at 800 °C had a larger dielectric constant and dielectric loss than the un-doped TiO2 and the other cobalt-doped samples. Finally, the anatase Co-doped TiO2 exhibited a maximum MB degradation of 93 % in 90 minutes compared to un-doped TiO2, which only degraded 14 % and rutile-TiO2 NPs (62 % degradation). The underlying mechanism responsible for the diverse photodegradation performance displayed by the anatase and rutile phases of TiO2 NPs is discussed. Overall, these results demonstrate that cobalt doping and the crystalline phase of TiO2 NPs are vital parameters involved in optimizing the photocatalytic activity of TiO2.

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Идентификаторы

DOI: 10.1016/j.jscs.2023.101711

Цитирования и источники

Цитирований: 5Использованных источников: 0

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