Development of a Gas Sensor Utilizing Chemiluminescence on Nanosized Titanium Dioxide

Abstract

A gas-sensing mode based on chemiluminescence generated on the surface of nanosized materials is proposed in the present work. Seven nanosized materials were tested, and chemiluminescence was detected from six of them during the catalytic oxidation of organic vapors in air. The luminescence characteristics of ethanol and acetone vapors passing through the surface of TiO2 chosen were studied with a chemiluminescence-based detection system. The linear range of chemiluminescence intensity versus concentration of organic compounds is 40-400 microg/mL for ethanol and 20-200 microg/mL for acetone dissolved in water, respectively. X-ray powder diffraction and Raman spectrometry were used to investigate the changes in catalytic activity of TiO2 after a 60-h reaction at 380 degrees C. The results showed that the carbon deposited on the surface of TiO2, decreasing the catalytic activity, but can be removed in air by controlling the temperature at 500 degrees C for 3 h. Regenerability and no consumption of sensor substrate signify the long lifetime of the gas sensor.

Effect of Au nano-particles on TiO2 nanorod electrode in dye-sensitized solar cells

“…Synthesis of aligned single-crystalline TiO 2 nanorods or nanowires has attracted extensive attention because of their excellent and unique potential applications in electronics, photochemistry, biology and optics, as well as their applications in gas sensors [10], dye-sensitized solar cells [11], lithium ion batteries [12], photovoltaic devices [2], and as photocatalysts [13].…”

Water adsorption on rutile TiO2(110) for applications in solar hydrogen production: A systematic hybrid-exchange density functional study

“…The (110) surface of rutile TiO 2 is the most stable among the rutile low-index surfaces, [14][15][16] and is considered to be a quintessential model metal oxide system for the study of water chemistry. This surface has received considerable attention for its use in photochemical reactions, 17 heterogeneous catalysis, 18 sorbent technology, 19 gas sensors, 20 and, in particular, photoelectrochemical solar energy conversion for the production of hydrogen 21 and electricity. 4 Generally speaking, a water molecule is able to bind to a surface molecularly or dissociatively.…”

Recent Advances in Graphitic Carbon Nitride-Based Chemiluminescence, Cataluminescence and Electrochemiluminescence

“…The distinct physical properties such as quantum size effects, high surface energy and the large surface area makes nanometer (nm)-sized materials have strong catalytic properties for redox reactions, which are usually determined by their size distribution, shapes and structure. Zhang and coworkers proposed nanosized TiO 2 as the sensing material to detect ethanol and acetone [82], which was considered as a pioneering work for the combination of nanomaterials and CTL-based chemosensors. Since then, CTL-based chemosensors with the adoption of various nanocatalysts have been intensively researched by many academic groups such as Zhang's [83][84][85][86] [96][97][98][99][100][101] and so on.…”