Effects of rare earth element doping on the ethanol gas-sensing performance of three-dimensionally ordered macroporous In₂O₃

Manipulating the Defect Structure (VO) of In2O3 Nanoparticles for Enhancement of Formaldehyde Detection

“…The patterns clearly show that all diffraction peaks can match well with the typical cubic In 2 O 3 (JCPDS PDF 06-0416, lattice parameter: a = 10.118 Å). The strong diffraction peaks observed at 2θ angles of 21.5, 30.5, 35.4, 51.0, and 60.7 correspond to the (211), (222), (400), (440), and (622) crystal planes of cubic In 2 O 3 , respectively. − No impurity diffraction peak is found. It is interesting that the peak intensities decrease first and then increase with the hydrogen treatment time.…”

A study of surface defects in Tb doped ZnO nanoparticles for gas sensing applications

“…Many research groups have developed semiconductor metal oxide sensors by adding various elements as dopants [3,4]. Electronic, chemical and surface properties of the host lattice can be altered by the substitution of an appropriate dopant element [5][6][7]. Rare earth elements are on high demands now a day for being used as dopants for various applications due to their highly magnetic, electrochemical and luminescent properties.…”

Gas sensors using ordered macroporous oxide nanostructures

“…117 In addition to doping noble metallic nanoparticles, oxide additives can be employed for tuning the gas-sensing characteristics. Rare-earth-(Tm, Er, La, Yb, and Ce)-doped 3DOM In 2 O 3 nanostructures were prepared by a CC templating method by Han et al 118 In particular, Tm-doped 3DOM In 2 O 3 exhibited the best gas-sensing performance, and the gas response for 100 ppm ethanol (122 at 175 C) was 7 times higher than that of pure 3DOM In 2 O 3 . Meantime, Gu and his co-workers prepared In-doped ZnO 3DOM with an aperture size of 150 nm and fabricated a gas sensor with higher response ($88) to 100 ppm ethanol at 250 C than that of the nondoped one, as shown in Fig.…”