Synthesis and Gas Sensing Properties of TiO₂–ZnO Core‐Shell Nanofibers

Abstract

We fabricated TiO2–ZnO core‐shell nanofibers via a novel two‐step process. In the first step, the TiO2 core nanofibers were synthesized by electrospinning. Subsequently, the ZnO shell layers were grown in a controlled manner using atomic layer deposition. The methodology proposed in this work is expected to be one of most suitable methods for preparing various kinds of oxide core‐shell nanofibers or nanowires. We investigated the O2 sensing properties of the synthesized core‐shell nanofibers. Good sensitivity and dynamic repeatability were observed for the sensor, demonstrating that the core‐shell nanofibers hold promise for the realization of sensitive and reliable chemical sensors.

Hierarchically Structured Electrospun Fibers

“…Park et al made TiO 2 -ZnO core-shell fibers using a TiO 2 template and atomic layer deposition. The core-shell fibers showed good oxygen sensing capability [106]. Zhan et al generated hollow TiO 2 fibers using a coaxial spinneret and machine oil as the core fluid.…”

Synthesis and Characterization of Nanocomposite of Functionalized Graphene Oxide with Multi Core-Shell Fe3O4-ZnO-TiO2 Nanoparticles

“…Yusoff et al [22], Maa et al [36], J.Y. Park group [37], Zubir et al [38] and several studies in the field of graphene-based composites were conducted in the past decade [39][40][41][42][43][44]. Most of the previous researches have been focused on either graphene with one component and/or a single core of magnetic nanomaterials with a single shell [5][6][7][8].…”

Stabilization of the anatase phase of Ti1−xSnxO2 (x < 0.5) nanofibers

“…Electrospinning is one of the several methods available for the synthesis of 1-D nanofibers. Recently, TiO 2 -and SnO 2 -based nanofibers were fabricated by electrospinning techniques and several studies focused on their potential applications in areas such as gas sensing, photoelectrochemical applications, solar cells, and photocatalytic activity [4][5][6][7][8].…”

“…When these two materials are coupled, it is expected that the photogenerated electrons from TiO 2 will be transferred to SnO 2 [10]. Many investigations have found that when these two oxides are coupled by suitable preparation methods, one can optimize their gas sensing or tune other properties required for various applications [4,5,9,[11][12][13][14][15][16][17][18][19][20][21].…”