Next Article in Journal
Effect of Neuromuscular Electrical Muscle Stimulation on Energy Expenditure in Healthy Adults
Next Article in Special Issue
Physiological Sensing of Carbon Dioxide/Bicarbonate/pH via Cyclic Nucleotide Signaling
Previous Article in Journal
Detection of Hydrofluoric Acid by a SiO2 Sol-Gel Coating Fiber-Optic Probe Based on Reflection-Based Localized Surface Plasmon Resonance
Previous Article in Special Issue
Preparation of Mesoporous and/or Macroporous SnO2-Based Powders and Their Gas-Sensing Properties as Thick Film Sensors
Open AccessArticle

Effect of TiO2 on the Gas Sensing Features of TiO2/PANi Nanocomposites

Institute of Engineering Physics, Hanoi University of Science and Technology, No.1, Daicoviet, Hanoi, Vietnam
Author to whom correspondence should be addressed.
Sensors 2011, 11(2), 1924-1931;
Received: 11 January 2011 / Revised: 25 January 2011 / Accepted: 28 January 2011 / Published: 1 February 2011
(This article belongs to the Special Issue Gas Sensors - 2010)
A nanocomposite of titanium dioxide (TiO2) and polyaniline (PANi) was synthesized by in-situ chemical polymerization using aniline (ANi) monomer and TiCl4 as precursors. SEM pictures show that the nanocomposite was created in the form of long PANi chains decorated with TiO2 nanoparticles. FTIR, Raman and UV-Vis spectra reveal that the PANi component undergoes an electronic structure modification as a result of the TiO2 and PANi interaction. The electrical resistor of the nanocomposite is highly sensitive to oxygen and NH3 gas, accounting for the physical adsorption of these gases. A nanocomposite with around 55% TiO2 shows an oxygen sensitivity of 600–700%, 20–25 times higher than that of neat PANi. The n-p contacts between TiO2 nanoparticles and PANi matrix give rise to variety of shallow donors and acceptor levels in the PANi band gap which enhance the physical adsorption of gas molecules. View Full-Text
Keywords: nanocomposites; TiO2; PANi; gas sensor nanocomposites; TiO2; PANi; gas sensor
MDPI and ACS Style

Huyen, D.N.; Tung, N.T.; Thien, N.D.; Thanh, L.H. Effect of TiO2 on the Gas Sensing Features of TiO2/PANi Nanocomposites. Sensors 2011, 11, 1924-1931.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

Only visits after 24 November 2015 are recorded.
Search more from Scilit
Back to TopTop