Highly sensitive and selective ethanol sensors using magnesium doped indium oxide hollow spheres

Pure In2O3, 0.5 and 1.0 wt% Mg doped In2O3 hollow spheres were synthesized by ultrasonic spray pyrolysis of a solution containing In-, Mg-nitrate and sucrose and their gas sensing characteristics to 5 ppm C2H5OH, p-xylene, toluene, and HCHO were measured at 250, 300 and 350C. Although the addition of Mg decreases the specific surface area and the volume of meso-pores, the gas response (resistance ratio) of the 0.5 wt% Mg doped In2O3 hollow spheres to 5 ppm C2H5OH at 350 C (69.4) was significantly higher than that of the pure In2O3 hollow spheres (24.4). In addition, the Mg doped In2O3 hollow spheres showed the highest selectivity to C2H5OH. This was attributed to the dehydrogenation of C2H5OH assisted by basic MgO into reactive CH3CHO and H2.

[1]  Yun Chan Kang,et al.  Extremely sensitive ethanol sensor using Pt-doped SnO2 hollow nanospheres prepared by Kirkendall diffusion , 2016 .

[2]  S. J. Park,et al.  Design of Highly Reliable Thick Film Gas Sensor Using SnO 2 Nanofibers , 2016 .

[3]  Ji-Wook Yoon,et al.  A Volatile Organic Compound Sensor Using Porous Co 3 O 4 Spheres , 2016 .

[4]  Ho Won Jang,et al.  Trimodally porous SnO2 nanospheres with three-dimensional interconnectivity and size tunability: a one-pot synthetic route and potential application as an extremely sensitive ethanol detector , 2016 .

[5]  Chang-Hoon Kwak,et al.  Vapor-phase growth of urchin-like Mg-doped ZnO nanowire networks and their application to highly sensitive and selective detection of ethanol , 2016 .

[6]  Joon-Shik Park,et al.  Trimethylamine Sensing Characteristics of Molybdenum doped ZnO Hollow Nanofibers Prepared by Electrospinning , 2015 .

[7]  Jong Heun Lee,et al.  Highly selective and sensitive xylene sensors using Ni-doped branched ZnO nanowire networks , 2015 .

[8]  S. Kang,et al.  Properties of IZTO Thin Films Deposited on PEN Substrates with Different Working Pressures , 2015 .

[9]  Xishuang Liang,et al.  Ultrasensitive and ultraselective detection of H2S using electrospun CuO-loaded In2O3 nanofiber sensors assisted by pulse heating , 2015 .

[10]  J. H. Lee,et al.  Ultrasensitive detection of trimethylamine using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis , 2015 .

[11]  Ho Won Jang,et al.  Ultraselective and sensitive detection of xylene and toluene for monitoring indoor air pollution using Cr-doped NiO hierarchical nanostructures. , 2013, Nanoscale.

[12]  K. Choi,et al.  Enhanced CO sensing characteristics of hierarchical and hollow In2O3 microspheres , 2009 .

[13]  Noboru Yamazoe,et al.  Toward innovations of gas sensor technology , 2005 .

[14]  Kengo Shimanoe,et al.  Cr-doped TiO2 gas sensor for exhaust NO2 monitoring , 2003 .

[15]  N. Yamazoe,et al.  Oxide Semiconductor Gas Sensors , 2003 .

[16]  Norio Miura,et al.  Relationship between ethanol gas sensitivity and surface catalytic property of tin oxide sensors modified with acidic or basic oxides , 2000 .

[17]  G. Messing,et al.  Ceramic Powder Synthesis by Spray Pyrolysis , 1993 .

[18]  R. D. Shannon.  Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides , 1976 .

[19]  Prabhakar Rai,et al.  Role of Pd nanoparticles in gas sensing behaviour of Pd@In2O3 yolk–shell nanoreactors , 2016 .