Efficient NO Photodegradation of Hydrothermally Synthesized TiO2 Nanotubes under Visible Light
DOI:
https://doi.org/10.18063/msmr.v2i2.636Keywords:
TiO2 nanotubes, NO removal, Photocatalysis, Trapping, ESRAbstract
In this study, TiO2 nanotubes (TNTs) were synthesized via a hydrothermal process and characterized by high-resolution transmission electron microscopy (HR-TEM) images, selected area electron diffraction (SAED) pattern, and photoluminescence (PL) analysis. The NO removal photocatalytic activity of the hydrothermally synthesizedTNTs was surveyed systematically. The hydrothermally synthesizedTNTs have shown an efficient NO photodegradation which is approximately 4 times higher than that of P25 and an excellent photostability under visible light after 5 cycles. Furthermore, reactive radicals mainly involved in the photocatalytic reaction were identified by electron spin resonance (ESR) study, leading to a better understanding of the photocatalytic mechanism of the hydrothermally synthesized TNTs.
References
Hangjuan Ren, Pramod Koshy, Wen-Fan Chen., et al, 2017, Photocatalytic materials and technologies for air purification. J Hazard Mater, 325, 340-366. DOI: 10.1016/j.jhazmat.2016.08.072.
Joana Ângelo, Luísa Andrade, Luís M.Madeira., et al, 2013, An overview of photocatalysis phenomena applied to NOx abatement, J Environ Manage, 129, 522-39. DOI: 10.1016/j.jenvman.2013.08.006.
Janusz Lasek, Yi-Hui Yu, Jeffrey Wu, 2013, Removal of NOx by photocatalytic processes, J Photoch Photobio C, 14, 29-52. DOI: 10.1016/j.jphotochemrev.2012.08.002.
WHO, 2010, WHO Guidelines for Indoor Air Quality: Selected Pollutants, in WHO Regional Office for Europe, Copenhagen.
Yinping Zhang, Jinhan Mo, Yuguo Li., et al, 2011, Can commonly-used fan-driven air cleaning technologies improve indoor air quality? A literature review. Atmos Environ, 45(26), 4329-4343. DOI: 10.1016/j.atmosenv.2011.05.041.
Bolashikov, Z.D. A.K. Melikov, 2009, Methods for air cleaning and protection of building occupants from airborne pathogens, Build Environ, 44(7), 1378-1385. DOI: 10.1016/j.buildenv.2008.09.001.
Danilo Spasiano, Raffaele Marotta, Sixto Malato., et al, 2015, Solar photocatalysis: Materials, reactors, some commercial, and pre-industrialized applications. A comprehensive approach, Appl Catal B: Environ, 170-171, 90-123. DOI: 10.1016/j.apcatb.2014.12.050.
Zhou, X., N. Liu, P. Schmuki, 2017, Photocatalysis with TiO2 Nanotubes: “Colorful” Reactivity and Designing Site-Specific Photocatalytic Centers into TiO2 Nanotubes, ACS Catal, 7(5), 3210-3235. DOI: 10.1021/acscatal.6b03709.
Manmadha Rao, Somnath Roy, 2014, Water assisted crystallization, gas sensing and photo-electrochemical properties of electrochemically synthesized TiO2 nanotube arrays, RSC Adv, 4(90), 49108-49114. DOI: 10.1039/C4RA06842D.
Van Viet Pham, Hong Huy Tran, Xuan Sang Nguyen., et al, 2018, One-step hydrothermal synthesis and characterisation of SnO2 nanoparticle-loaded TiO2 nanotubes with high photocatalytic performance under sunlight, J Mater Sci, 53(5), 3364-3374. DOI: 10.1007/s10853-017-1762-6.
Van Viet Pham, Dai Phat Bui, Hong Huy Tran., et al, 2018, Photoreduction route for Cu2O/TiO2 nanotubes junction for enhanced photocatalytic activity, RSC Adv, 8(22), 12420-12427. DOI: 10.1039/C8RA01363B.
Van Viet Pham, Bach Thang Phan, Derrick Mott., et al, 2018, Silver nanoparticle loaded TiO2 nanotubes with high photocatalytic and antibacterial activity synthesized by photoreduction method, J Photoch Photobio A, 352, 106-112. DOI: 10.1016/j.jphotochem.2017.10.051.
Van Viet Pham, Tan Sang Truong, Quoc Hien Nguyen., et al, 2018, Synthesis of a silver/TiO2 nanotube nanocomposite by gamma irradiation for enhanced photocatalytic activity under sunlight, Nucl Instrum Methods Phys Res B, 429, 14-18. DOI: 10.1016/j.nimb.2018.05.023.
Liang-Bin Xiong, Jia-Lin Li, Bo Yang., et al, 2012, Ti3+in the Surface of Titanium Dioxide: Generation, Properties and Photocatalytic Application, J Nanomater, 2012, 1-13. DOI: 10.1155/2012/831524.
Van Viet Pham, Bach Thang Phan, Van Hieu Le., et al., 2015, The Effect of Acid Treatment and Reactive Temperature on the Formation of TiO2 Nanotubes, J Nanosci Nanotechnol, 15(7), 5202-5206. DOI: 10.1166/jnn.2015.10025.
