Tổng hợp vật liệu F-TiO2/Bent và đánh giá hoạt tính quang xúc tác trong vùng ánh sáng khả kiến
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DOI:
https://doi.org/10.15625/0866-7144.2017-00419Keywords:
Titanium dioxide, fluoride, bentonite, photocatalysis, visible lightAbstract
Flouride doped TiO2 loaded on bentonite support (F-TiO2/Bent) has been emerged as an effective catalyst for improving the activity of F-TiO2. F-doped TiO2/Bent material was prepared by sol-gel route from Binh Dinh ilmenite ore using KF as a dopant precursor. The experimental results revealed that F-TiO2/Bent material exhibited a quite unique spherical structure as compared to F-TiO2. The absorption in the visible light of the F-TiO2/Bent was found to be improved and was shifted to longer wavelength (visible region). Compared with F-TiO2, the as-prepared photocatalysts exhibit enhanced photocatalytic performance treatment of methylene blue (MB) under visible light.
Keywords. Titanium dioxide, fluoride, bentonite, photocatalysis, visible light.Downloads
References
N. Paulino, V. M. M. Salim, N. S. Resende. Zn-Cu promoted TiO2 photocatalyst for CO2 reduction with H2O under UV light, Applied Catalysis B: Environmental, 185, 362-370 (2016).
R. Gusain, P. Kumar, O.P. Sharma, S.L. Jain, O.P. Khatri. Reduced graphene oxide-CuO nanocomposites for photocatalytic conversion of CO2 into methanol under visible light irradiation, Applied Catalysis B: Environmental, 181, 352-362 (2016).
Y. Liu, Q. Li, J. Zhang, W. Sun, S. Gao, J. K. Shang. PdO loaded TiO2 hollow sphere composite photocatalyst with a high photocatalytic disinfection efficiency on bacteria, Chemical Engineering Journal, 249, 63-71 (2014).
M. F. Ehsan, T. He. In situ synthesis of ZnO/ZnTe common cation heterostructure and its visible-light photocatalytic reduction of CO2 into CH4, Applied Catalysis B: Environmental, 166-167, 345-352 (2015).
M. Li, L. Zhang, M. Wu, Y. Du, X. Fan, M. Wang, L. Zhang, Q. Kong, J. Shin. Mesostructured CeO2/g-C3N4 nanocomposites: Remarkably enhanced photocatalytic activity for CO2 reduction by mutual component activations, Nano Energy, 19, 145-155 (2016).
X. Sun, C. Li, L. Ruan, Z. Peng, J. Zhang, J. Zhao, Y. Li. Ce-doped SiO2@TiO2 nanocomposite as an effective visible light photocatalyst, Journal of Alloys and Compounds, 585, 800-804 (2014).
X. Hu, Q. Zhu, X. Wang, N. Kawazoe, Y. Yang. Nonmetal - metal - semiconductor - promoted P/Ag/Ag2O/Ag3PO4/TiO2 photocatalyst with superior photocatalytic activity and stability, Journal of Materials Chemistry A, 3, 17858-17865 (2015).
R. Jaiswal, J. Bharambe, N. Patel, A. Dashora, D.C. Kothari, A. Miotello. Copper and Nitrogen co-doped TiO2 photocatalyst with enhanced optical absorption and catalytic activity, Applied Catalysis B: Environmental, 168-169, 333-341 (2015).
R. Jaiswal, N. Patel, D.C. Kothari, A. Miotello. Improved visible light photocatalytic activity of TiO2 co-doped with Vanadium and Nitrogen, Applied Catalysis B: Environmental, 126, 47-54 (2012).
T. Liu, B. Liu, J. Wang, L. Yang, X. Ma, H. Li, Y. Zhang, S. Yin, T. Sato,T. Sekino, and Y. Wang. Smart window coating based on F-TiO2-KxWO3 nanocomposites with heat shielding, ultraviolet isolating, hydrophilic and photocatalytic performance, Sci. Rep., 6, 27373-27382 (2016).
T. Ohno, M. Akiyoshi, T. Umebayashi, K. Asai, T. Mitsui, and M. Matsumura. Preparation of S-doped TiO2 photocatalysts and their photocatalytic activities under visible light, Applied Catalysis A, 1(265), 115-121 (2004).
T. Tachikawa, S. Tojo, K. Kawai, Masayuki Endo, Mamoru Fujitsuka, Teruhisa Ohno, Kazumoto Nishijima, Zenta Miyamoto and Tetsuro Majima. Photocatalytic oxidation reactivity of holes in the sulphur-and carbon-doped TiO2 powders studied by time-resolved diffuse reflectance spectroscopy, Journal of Physical Chemistry B, 50(108), 19299-19306 (2004).
H. Park and W. Choi. Effects of TiO2 surface fluorination on photocatalytic reactions and photoelectrochemical behaviors, Journal of Physical Chemistry B, 13(108), 4086-4093 (2004).
