Platinum resistive film CO sensor without selective layer

The Novel CO sensing material CoOOH–WO3 with Au and SWCNT performance enhancement

“…According to the cross-sensitivity test, CO gas triggered the highest sensor response (S = 5.1) among the 12 different gases at working temperature 80 • C [17]. CoOOH sensing materials are used in our research group and in that of Zhuiykov and co-workers' [15,17], and the optimum CO detection working temperature has been found to be as low as 80 • C. Since the working temperatures of the above sensors are still high [5][6][7][8][9][10][11][12][13][14][15]17], the energy consumed in heating the sensor heads is large and not easily pared down for integration in a heated circuit device.…”

“…CO concentrations have been detected in factories, indoor atmospheres, vehicle emissions, natural gas emissions, natural gases, and industrial wastes. Various kinds of CO sensors have wide applications in many fields [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Many different CO sensing technologies have been studied: electrochemical [1], optical [2], potentiometric [3,4], and resistive [5][6][7][8][9][10][11][12][13][14][15] types have all been used to detect CO concentrations.…”

“…However, the working temperatures of the above-mentioned CO sensors were recorded as higher than 80 • C [5][6][7][8][9][10][11][12][13][14][15]. Carbon nanotube (CNT) is useful and active material used in various chemical material detections [18][19][20][21][22][23][24], and it possesses many good properties for chemical sensors.…”

Design and construction of Co3O4/PEI–CNTs composite exhibiting fast responding CO sensor at room temperature

“…The working temperatures of the above-mentioned CO sensors were all recorded as higher than room temperature. [30][31][32][33][34] Thirdly are CNTs-based gas sensors (Co 3 O 4 /CNTs or Co 3 O 4 -other metal oxide/CNTs composite gas sensors). Regardless of the form of CNTs in the devices, CNTsbased sensors have unique advantages over other materials.…”

Pd modified CO sensors with oscillatory response

“…Under adequate operating temperatures and CO concentrations [14], the Pt surface alternately covered by CO ads and O ads , which lead to the oscillation in conductance of Pt. As for the mechanism responsible for the response of Pd-SnO 2 bead and its interdependence on that of Pt coil, more experiments are needed to reveal the underlying mechanisms.…”