Graphene Oxide-Assisted Morphology and Structure of Electrodeposited ZnO Nanostructures

Abstract

In this paper, ZnO electrodeposition was studied with the presence of graphene oxide (GO) exploited as a possible structure-directing agent. The effect of deposition potential and duration on the morphology and structure of ZnO was analyzed. The morphology and structure of the hybrids was analyzed by Raman spectroscopy, X-ray diffraction (XRD), and Scanning Electron Microscopy (SEM). The Raman results indicate a successful modification of ZnO with GO sheets and a hybridization threshold of 10 mg L−1 by the evolution of the defect related band of ZnO at 580 cm−1. The morphology results show that a low GO content only slightly influences the morphology and orientation of ZnO nanostructures while a high content as 10 mg L−1 changes the morphology in nanoplates and growth orientation to lateral. The results show that while GO participated in the deposition reaction, it has a two-fold role, also by structure-controlling ZnO, indicating that the approach is valid for the use of GO as a structure-directing agent for the fabrication of ZnO nanostructures by electrodeposition with varying morphologies and orientations.

Electrochemical Synthesis of Zinc Oxide Nanostructures on Flexible Substrate and Application as an Electrochemical Immunoglobulin-G Immunosensor

“…As it can be observed in the high magnification images presented in Figure 7, after rGO deposition, the electrode was covered with a thin film of rGO that is clearly evident in the marked areas of Figure 7B. As expected, the rGO is extremely thin and its presence does not change the morphology of the ZnO NRs [117]. To better point out the presence of rGO in Figure 7B, the high magnification SEM image of electrode before rGO deposition is also reported, Figure 7A.…”

“…Particularly, the peak ratio between D and G bands in rGO-ZnO-NRs electrode is of about 1.5 showing the efficient reduction of GO. The broad band at 500 cm −1 is characteristic of ZnO, and is generated by the overlapping of the vibrational modes at 310, 440 and 580 cm −1 [117]. The other Raman modes coming from ITO/PET substrate [4].…”

Electrodeposition of ZnO/Cu2O Heterojunctions on Ni-Mo-P Electroless Coating

“…The related chronoamperogram is further presented in Figure 2A. The evolution of the process is found to agree with reported results, and the nucleation process is reached in about 100 s (see inset) [58] while the current plateau value establishes at about 0.75 mA cm −2 . These results indicate that the properties of ITO coating onto the ceramic surface allow the nucleation and growth of ZnO structure by offering the necessary nucleation centers.…”

Dual Transduction of H2O2 Detection Using ZnO/Laser-Induced Graphene Composites

“…Engineering new functional materials based on the above-mentioned ones by combining their properties has been an intensive topic of research by the scientific community due to potential synergies [13][14][15][16][17]. In fact, such a combination has already been explored by our research team [15,18] with effective results.…”