Hexamethylenetetramine-mediated TiO2 films: Facile chemical synthesis strategy and their use in nitrogen dioxide detection

• Published in: Materials letters Vol. 173; pp. 9 - 12
• Main Authors: Navale, S.T., Tehare, K.K., Shaikh, S.F., Patil, V.B., Pawar, B.N., Naushad, Mu, Stadler, F.J., Mane, R.S.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.06.2016
• Subjects: Crystallinity; Deposition; Gas sensor; Hexamethylenetetramine; Methyl alcohol; Microstructure; Nanoparticles; Nitrogen dioxide; Sensors; Strategy; Titanium dioxide; Nanoparticles; Gas sensor; Microstructure; Titanium dioxide
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2016.02.140

Hexamethylenetetramine (HMT)-mediated rutile and polycrystalline TiO2 films are directly grown on a glass substrate by a simple chemical wet deposition method at ambient temperature. After confirming the crystallinity, phase-purity and surface morphology, as-grown TiO2 films were explored for a variety of target gases including nitrogen dioxide, methanol, ethanol and ammonia at different temperatures for confirming the sensor application potential. The TiO2 film shows a maximum response of 43% to 100ppm NO2@180°C with fast response time of 16s. In addition, the TiO2 sensor film has potential to detect concentration of NO2 as low as 10ppm. [Display omitted] •Facial synthesis strategy for the formation polycrystalline TiO2 films.•XRD and Raman analysis confirms the rutile phase of TiO2.•TiO2 films were highly sensitive and selective towards NO2 gas@180°C.•TiO2 film is able to detect as low as 10ppm NO2 concentration.