Open AccessThe directed preparation of TiO<sub>2</sub> nanotubes film on FTO substrate via hydrothermal method for gas sensing application
Author(s) -
Viet Van Pham,
Lê Văn Hiếu,
Cao Minh Thi
Publication year - 2016
Publication title -
aims materials science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.367
H-Index - 16
eISSN - 2372-0484
pISSN - 2372-0468
DOI - 10.3934/matersci.2016.2.460
Subject(s) - hydrothermal circulation , tin oxide , substrate (aquarium) , scanning electron microscope , materials science , nanotechnology , hydrothermal synthesis , analytical chemistry (journal) , nanometre , transmission electron microscopy , doping , tin dioxide , field electron emission , chemical engineering , diffraction , chemistry , optoelectronics , electron , optics , chromatography , composite material , metallurgy , physics , quantum mechanics , oceanography , engineering , geology
In this research, we directly synthesized TiO2 nanotubes film on Fluorine doped Tin oxide (FTO) substrate via hydrothermal method from commercial TiO2 in NaOH solution at 135 ℃ for 24 hours. The samples were characterized by X-ray diffraction (XRD) pattern, field emission scanning electron microscopy (FESEM) and transmitting electron microscopy (TEM). The average diameter of TiO2 nanotubes (TNTs) is about 10–12 nm and their length is about a few hundred nanometers. The sensitivity ability of TNTs increases as the gas concentration increases and developing to the highest sensitivity of TNTs is 2.4 at 700 ppm of the ethanol concentration. The same as the gas concentration, the sensitivity of TNTs increases when the temperature increases. Besides, the sensitivity of samples at 250 ℃ is doubled compared to samples determined at 100 ℃