CuO Codoped ZnO Based Nanostructured Materials for Sensitive Chemical Sensor Applications

Abstract

Due to numerous potential applications of semiconductor transition metal-doped nanomaterials and the great advantages of hydrothermal synthesis in both cost and environmental impact, a significant effort has been employed for growth of copper oxide codoped zinc oxide (CuO codoped ZnO) nanostructures via a hydrothermal route at room conditions. The structural and optical properties of the CuO codoped ZnO nanorods were characterized using various techniques such as UV-visible, Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), etc. The sensing performance has been executed by a simple and reliable I-V technique, where aqueous ammonia is considered as a target analyte. CuO codoped ZnO nanorods of thin film with conducting coating agents on silver electrodes (AgE, surface area of 0.0216 cm(2)) displayed good sensitivity, stability, and reproducibility. The calibration plot is linear over the large dynamic range, where the sensitivity is approximately 1.549 ± 0.10 μA cm(-2 )mM(-1) with a detection limit of 8.9 ± 0.2 μM, based on signal/noise ratio in short response time. Hence, on the bottom of the perceptive communication between structures, morphologies, and properties, it is displayed that the morphologies and the optical characteristics can be extended to a large scale in transition-metal-doped ZnO nanomaterials and efficient chemical sensors applications.

Thermally stable hybrid polyarylidene(azomethine-ether)s polymers (PAAP): an ultrasensitive arsenic(III) sensor approach

“…As obtained, the current response of the PAAP/Nafion/GCE is increased with the increasing concentration of As 3+ ; however similar phenomena for cationic detection have also been reported earlier [59–61]. For a low concentration of As 3+ in liquid medium, there is a smaller surface coverage of As 3+ ions on PAAP/GCE film and hence the surface reaction proceeds steadily.…”

Toward designing efficient rice-shaped polyaniline@bismuth oxide nanocomposites for sensor application

“…I-V characteristic of the PANI@Bi 2 O 3 nanorice is activated as a function of 3-methoxy phenol concentration at room conditions, where improved current response is observed. As obtained, the current response of the PANI@Bi 2 O 3 nanorice film is increased with the increasing concentration of 3-methoxy phenol; however, similar phenomena for toxic chemical detection have also been reported earlier [34][35][36][37][38][39][40]. For a low concentration of 3-methoxy phenol in liquid medium, there is a smaller surface coverage of 3-methoxy phenol molecules on PANI@Bi 2 O 3 nanorice/ AgE film, and hence, the surface reaction proceeds steadily.…”

Comparison of the photocatalytic degradation of trypan blue by undoped and silver-doped zinc oxide nanoparticles

“…Significant spectroscopic (Fig. 4(b)) bands at 405 cm À 1 and 510 cm À 1 can be assigned to Zn-O and Ag-ZnO vibrational stretching frequencies respectively [40][41][42][43]. XPS spectra of Ag 3d, Zn 2p, O 1s, C1s and wide spectrum of ZnO:Ag is shown in Fig.…”