Electrospun ZnSnO3/ZnO Composite Nanofibers and Its Ethanol-Sensitive Properties

Abstract

In this work, a novel heterojunction based on ZnSnO3/ZnO nanofibers was prepared by a simple electrospinning method. The crystal, structural, and surface compositional properties of ZnSnO3 and ZnSnO3/ZnO composite nanofibers were investigated by X-ray diffractometer (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectrometer (XPS), and Brunauer–Emmett–Teller (BET). Compared to pure ZnSnO3 nanofibers, the ZnSnO3/ZnO heterostructure nanofibers had high sensitivity and selectivity response with the fast response toward ethanol gas at low operational temperature. The sensing response of the sensor based on ZnSnO3/ZnO composite nanofibers was 19.6 toward 50 ppm ethanol gas at 225 °C, which was about 1.5 times superior to that of pure ZnSnO3 nanofibers. It can be owed mainly to the oxygen vacancies and the synergistic effect between ZnSnO3 and ZnO.

Co-sensitization of Copper Indium Gallium Disulfide and Indium Sulfide on Zinc Oxide Nanostructures: Effect of Morphology in Electrochemical Carbon Dioxide Reduction

“…The diffraction peaks residing at 26.47, 33.74, 37.83, 51.50, 61.55, and 65.47° are well indexed to the crystal planes of (012), (013), (114), (116), (124), and (036), respectively, matching with the orthorhombic crystal phase of ZnSnO 3 , as in previously reported works (JCPDS: 28-148). 44 , 54 , 55 The absence of the characteristic ZnSn(OH) 6 phase at 22° (200) indicated a complete transformation of ZnSn(OH) 6 to ZnSnO 3 after calcination at 550 °C. As reported in our previous work, the formation of ZnO NW and NF nanostructured thin films varies with the types of precursors (urea and NH 4 OH) and pH in the hydrothermal reaction solution.…”

In Situ Decoration of ZnSnO3 Nanosheets on the Surface of Hollow Zn2SnO4 Octahedrons for Enhanced Solar Energy Application

“…Synthesis of ternary metal oxides with controllable sizes and shapes has been an active research field in the past two decades, because of their size-and shape-dependent physical, chemical, optical, electronic, and catalytic properties [1][2][3]. In particular, the two zinc stannates, Zn 2 SnO 4 and ZnSnO 3 , have caused considerable attention due to their wide applications in dye-sensitized solar cells (DSSCs) [4,5], gas sensors [6,7], lithium-ion batteries [8,9], and photocatalysts [10,11]. Zn 2 SnO 4 and ZnSnO 3 are both photovoltaic and photocatalytic materials with band gaps of about 3.6 eV and 3.2 eV, and the Femi energy level of ZnSnO 3 is higher than that of Zn 2 SnO 4 [12,13].…”