ساخت و مشخصه‌یابی نانوذرات دی‌اکسید تیتانیوم آلائیده شده با اتم‌های سریم با روش تخلیه الکتریکی

نویسندگان

1 1. دانشکده علوم پایه، گروه فیزیک، دانشگاه زنجان

2 2. دانشکده علوم پایه، گروه فیزیک، دانشگاه آزاد اسلامی ورامین

چکیده

نانوذرات دی­اکسید تیتانیوم (TiO2) به‌عنوان یک ماده فوتوکاتالیست پرکاربرد شناخته شده ­است. برای بهبود کارایی این نانوذرات باید بازترکیب زوج الکترون– حفره کاهش داده و همچنین میزان جذب به ناحیه مرئی گسترش داده شود. یک روش برای افزایش کارایی این نانوذرات، آلائیدن آنها با عناصر گروه لانتانیدها مانند سریم است. در تحقیق پیش رو نانوذرات TiO2 خالص و آلائیده شده با سریم از روش تخلیه الکتریکی ساخته شدند. تاثیر سریم بر خواص ساختاری، مورفولوژیکی و اپتیکی آنها با آنالیزهای پراش پرتو X (XRD)، میکروسکوپ الکترونی روبشی گسیل میدانی (FESEM)، طیف بازتاب پخشی (DRS) و فتولومینسانس (PL) مورد بررسی قرار گرفت. مطالعه ساختاری پراش پرتوایکس نشان داد که اندازه نانوذرات TiO2 با وجود Ce، تا 7/27 نانومتر کاهش می ­یابد. مورفولوژی سطح نانوذرات نشان داد که یکنواختی نانوذرات در نمونه با ناخالی سریم کاهش می­ یابد. نتایج طیف بازتابش پخشی نشان داد که گاف نواری با وجود سریم تا  24/2 الکترون‌ولت کاهش می­ یابد. نتایج آنالیز فتولومینسانس نشان داد که برای نمونه ناخالص، شدت فتولومینسانس کاسته می‌شود که این باعث کاهش بازترکیب زوج الکترون- حفره و افزایش فعالیت فتوکاتالیستی در نانوذرات می شود.

کلیدواژه‌ها


عنوان مقاله [English]

Preparation and Characterization of Cerium Doped Titanium Dioxide Nanoparticles by the Electrical Discharge Method

نویسندگان [English]

  • A. Jafari 1
  • S. Khademi 1
  • M. Farahmandjou 2
  • A. Darudi 1
  • R. Rasuli 1
1 1. Department of Physics, University of Zanjan, Zanjan, Iran.
2 2. Departments of Physics, Islamic Azad University, Varamin Pishva Branch, Varamin, Iran.
چکیده [English]

Titanium dioxide nanoparticles (TiO2) are known as a widely used photocatalyst. In order to improve the performance of these nanoparticles, the recombination of the electron-cavity pair must be reduced and the absorption rate of the visible region should be expanded. One way to increase the performance of these nanoparticles is using cerium doped TiO2. In the present study, pure and doped titanium dioxide nanoparticles were made by the electrical discharge method. The effect of cerium dopants on the structural, morphological and optical properties were studied by x-ray diffraction (XRD), scanning electron microscopy (FESEM), diffused reflection spectroscopy (DRS), photoluminescence (PL) and infrared fourier transform (FTIR) spectroscopy analyses. XRD analysis revealed that the size of TiO2 nanocrystals was decreased to 7.7 nm. The FESEM morphology of the samples also showed that the uniformity of the Ce doped TiO2 was decreased. Further, the DRS results indicated that the band gap energy of Ce-TiO2 was decreased to 2.24 eV. The photoluminescence results demonstrated that the intensity of PL was reduced for the Ce-TiO2 sample, which reduced the recombination of the electron-hole coupling and increased the photocatalytic activity in the doped sample.

کلیدواژه‌ها [English]

  • titanium dioxide
  • Nanocrystal
  • Electrical discharge method
  • Cerium dopant
1. Shadrokh, S., Farahmandjou, M., and Firozabadi, T. P., “Fabrication and Characterization of Nanoporous Co Oxide (Co3O4) Prepared by Simple Sol-Gel Synthesis”, Physical Chemistry Research, Vol. 4, pp. 153-160, 2016.
2. Farahmandjou, M., Honarbakhsha, S., and Behrouziniab, S., “PVP-Assisted Synthesis of Cobalt Ferrite (CoFe2O4) Nanorods”, Physical Chemistry Research, Vol. 4, pp. 655-662, 2016.
3. Dastpak, M., Farahmandjou, M., and Firoozabadi, T. P., “Synthesis and Preparation of Magnetic Fe-Doped CeO2 Nanoparticles Prepared by Simple Sol-Gel Method”, Journal of Superconductivity and Novel Magnetism, Vol. 29, pp. 2925-2929, 2016.
4. Farahmandjou, M., and Soflaee, F., “Polymer-Mediated Synthesis of Iron Oxide (Fe2O3) Nanorods”, Chinese Journal of Physics, Vol. 53, pp. 080801-9, 2015.
5. Jurablu, S., Farahmandjou, M., and Firoozabadi, T. P., “Multiple-Layered Structure of Obelisk-Shaped Crystalline Nano-ZnO Prepared by Sol-Gel Route”, Journal of Theoretical and Applied Physics, Vol. 9, pp. 261-266, 2015.
6. Farahmandjou, M., and Soflaee, F., “Synthesis and Characterization of α-Fe2O3 Nanoparticles by Simple Co-precipitation Method”, Physical Chemistry Research, Vol. 3, pp. 193-198, 2015.
7. Zarinkamar, M., Farahmandjou, M., and Firoozabadi, T. P., “Diethylene Glycol-Mediated Synthesis of Nano-Sized Ceria (CeO2) Catalyst”, Journal of Nanostructures, Vol. 6, pp. 114-118, 2016.
8. Sebt, S. A., Parhizgar, S. S., Farahmandjou, M., Aberomand, P., and Akhavan. M., “The Role of Ligands in the Synthesis of FePt Nanoparticles”, Journal of Superconductivity and Novel Magnetism, Vol. 22, pp. 849-854, 2009.
9. Ramazani, M., Farahmandjou, M., and Firoozabadi, T. P., “Fabrication and Characterization of Rutile TiO2 Nanocrystals by Water Soluble Precursor”, Physical Chemistry Research, Vol. 3, pp. 293-298, 2015.
10. Farahmandjou, M., and Khalili, P., “Morphology Study of Anatase Nano-TiO2 for Self-Cleaning Coating”, International Journal of Fundamental Physical Sciences, Vol. 3, pp. 54-56, 2013.
11. Ramazani, M., Farahmandjou, M., and Firoozabadi, T. P., “Effect of Nitric Acid on Particle Morphology of the Nano-TiO2”, International Journal of Nanoscience and Nanotechnolgy, Vol. 11, pp. 115-122, 2015.
12. Farahmandjou, M., and Khalili, P., “Study of Nano SiO2/TiO2 Superhydrophobic Self-Cleaning Surface Produced by Sol-Gel”, Australian Journal of Basic and Applied Sciences, Vol. 7, pp. 462-465, 2013.
13. Farahmandjou, M., “Self-Cleaning Measurement of Nano-Sized Photoactive TiO2”, Journal of Computer & Robotics, Vol. 5, pp. 15-19, 2014.
14. Khoshnevisan, B., Marami, M. B., and Farahmandjou, M., “Fe3+-Doped Anatase TiO2 Study Prepared by New Sol-Gel Precursors”, Chinese Physics Letter, Vol. 35, pp. 027501-5, 2018.
15. Marami, M. B., Farahmandjou, M., and Khoshnevisan, B., “Sol-Gel Synthesis of Fe-doped TiO2 Nanocrystals” Journal of Electronic Materials, Vol. 47, pp. 3741-3749, 2018.
16. Farahmandjou, M., “Synthesis of ITO Nanoparticles Prepared by Degradation of Sulfide Method”, Chinese Physics Letters, Vol. 29, pp. 077306-9, 2012.
17. Farahmandjou, M., “Synthesis and Structural Study of L10- FePt Nanoparticles”, Turkish Journal of Engineering and Environmental Sciences, Vol. 34, pp. 265-270, 2010.
18. Farahmandjou, M., Honarbakhsh, S., and Behrouzinia, S., “FeCo Nanorods Preparation using New Chemical Synthesis, Journal of Superconductivity and Novel Magnetism, Vol. 31, pp. 4147-4152, 2018.
19. Farahamndjou, M., “The Study of Electro-Optical Properties of Nanocomposite ITO Thin Films Prepared by E-Beam Evaporation”, Revista Mexicana De Física, Vol. 59, pp. 205-207, 2013.
20. Farahmandjou, M., Motaghi, S., “Sol-Gel Synthesis of Ce-Doped α-Al2O3: Study of Crystal and Optoelectronic Properties”, Optics Communications, Vol. 441, pp. 1-7, 2019.
21. Zarinkamar, M., Farahmandjou, M., and Firoozabadi, T. P., “One-Step Synthesis of Ceria (CeO2) Nano-Spheres by a Simple Wet Chemical Method”, Journal of Ceramic Processing Research, Vol. 17, pp. 166-169, 2016.
22. Farahmandjou, M., and Golabiyan, N., “New Pore Structure of Nano-Alumina (Al2O3) Prepared by Sol- Gel Method”, Journal of Ceramic Processing Research, Vol. 16, pp. 237-240, 2015.
23. Jafari, A., Khademi, S., and Farahmandjou, M., “Nano-Crystalline Ce-Doped TiO2 Powders: Sol-Gel Synthesis and Optoelectronic Properties”, Materials Research Express, Vol. 5, pp. 095008-18, 2018.
24. Jafari, A., Khademi, S., Farahmandjou, Darudi, A., and Rasuli, R., “Structural and Optical Properties of Ce3+-doped TiO2 Nanocrystals Prepared by Sol-Gel Precursors”, Journal of Electronic Materials, Vol. 47, pp. 6901-6908, 2018.
25. Scherrer, P., “Göttinger Nachrichten Gesell”, Mathematisch-Physikalische Klasse, Vol. 2 pp. 98-100, 1918.
26. Farahmandjou, M., “Effect of Oleic Acid and Oleylamine Surfactants on the Size of FePt Nanoparticles”, Journal of Superconductivity and Novel Magnetism, Vol. 25, pp. 2075-2079, 2012.
27. Akhtari, F., Zorriasatein, S., Farahmandjou, M., and Elahi, S. M., “Structural, Optical, Thermoelectrical, and Magnetic Study of Zn1-xCoxO (0 ≤ x ≤ 0.10) Nanocrystals”, International Journal of Applied Ceramic Technology, Vol. 15, pp. 723-733, 2018.
28. Akhtari, F., Zorriasatein, S., Farahmandjou, M., and Elahi, S. M., “Synthesis and Optical Properties of Co2+-doped ZnO Network Prepared by New Precursors”, Material Research Express, Vol. 5, pp. 065015-24, 2018.
29. Khodadadi, A., Farahmandjou, M., Yaghoubi, M., and Amani, A. R., “Structural and Optical Study of Fe3+-Doped Al2O3 Nanocrystals Prepared by New Sol-Gel Precursors”, International Journal of Applied Ceramic Technology, Vol. 16, pp. 718-726, 2019.
30. Zarinkamar, M., Farahmandjou, M., and Firoozabadi, T. P., “Diethylene Glycol-Mediated Synthesis of Nano-Sized Ceria (CeO2) Catalyst”, Journal of Nanostructures, Vol. 6, pp. 116-120, 2016.

تحت نظارت وف ایرانی