Gas-sensing characteristics of modified-MoO3 thin films using Ti-overlayers for NH3 gas sensors

Structural, optical, vibrational and photoluminescence studies of Sn-doped MoO 3 sprayed thin films

“…This material has also important properties which are explored for several applications such as gas sensors [7][8][9][10], selective catalytic [11,12] and selective oxidation catalysis. This transition-metal oxide [13] has been studied as attractive candidates of chromogenic materials owing to their fast response, high coloration efficiency and long-term stability.…”

Gas sensing properties of thermally evaporated lamellar MoO3

“…MoO 3 has been well known for its application as a catalyst for the oxidation of hydrocarbons and reduction of NO x in the chemical and petroleum industry [11][12][13][14]. Efforts were also made to examine and improve the gas sensing properties of MoO 3 based devices to detect H 2 [10,15], CO [15,16], NH 3 [10,12,17], and LPG [10]. Imawan et al [17] studied the RF sputtered MoO 3 thin films for sensing responses to various gases, including CO, CH 4 , SO 2 , NO 2 and NH 3 in the temperature range of 250 • C and 475 • C. They revealed that MoO 3 was highly sensitive to NH 3 at 425 • C and that the gas sensitivity dropped with decreasing film thickness (<300 nm).…”

Studies on gas sensing performance of pure and modified barium strontium titanate thick film resistors

“…There are many principles for measuring NH 3 described in the literature (Timmer et al 2005;Yamazoe 2005). The ammonia sensors that have been manufactured in the largest quantities are mostly based on SnO 2 sensors (Clifford and Tuma 1983;Huebner and Drost 1991;Srivastava et al 1994;Sberreglieri 1995;Imawan et al 2000;Zakrzewska 2001). These sensors are rugged and inexpensive.…”