11 research outputs found
One-pot synthesis of Bi-Ni nanowire and nanocable arrays by coelectrodeposition approach
A novel and convenient one-pot electrodeposition approach has been developed for precisely controlled fabrication of large-scale Bi-Ni nanowire and nanocable arrays. Using porous anodic aluminum oxide as a shape-directing template, by simply changing the electrochemical deposition mode, desired Bi-Ni hybrid nanowires and Bi-Ni core-shell nanocables have been obtained in the CV and CC modes, respectively. The structure, morphology, and composition of the as-prepared samples were characterized using X-ray powder diffraction, transmission electron microscopy, elemental mapping, and energy-dispersive X-ray spectrometry
Large-scale fabrication of single crystalline tin nanowire arrays
Large-scale single crystalline tin nanowire arrays with preferred lattice orientation along the [100] direction were fabricated in porous anodic aluminium oxide (AAO) membranes by the electrodeposition method using copper nanorod as a second electrode
Wet-Chemical Approaches to Porous Nanowires with Linear, Spiral, and Meshy Topologies
We report universal approaches for
porous nanowires (NWs), and
porous NWs with spiral and meshy topologies that have been developed
via anodic aluminum oxide (AAO) confined wet-chemical synthesis. Materials
such as CuO<sub><i>x</i></sub>, Pd, and Cu NWs are taken
as examples for porous NWs and porous NWs with spiral and meshy topologies.
Immediate benefits are demonstrated in hydrogen sensors as examples.
We observed that hydrogen concentrations as low as 0.2% (v/v) were
detected, that critical temperatures of the reverse sensing behavior
as low as 239.9 K were measured and that better baseline-stability
was confirmed compared with those fabricated with pure Pd NWs. Our
approaches are anticipated to work on the synthesis of the porous
NWs of other materials that could be obtained via wet-chemistry with
potential as candidates for the next generation nanodevices (e.g.,
gas sensors) and other applications (e.g., catalysts)
MoS2 Nanosheet Arrays Rooted on Hollow rGO Spheres as Bifunctional Hydrogen Evolution Catalyst and Supercapacitor Electrode
Abstract MoS2 has attracted attention as a promising hydrogen evolution reaction (HER) catalyst and a supercapacitor electrode material. However, its catalytic activity and capacitive performance are still hindered by its aggregation and poor intrinsic conductivity. Here, hollow rGO sphere-supported ultrathin MoS2 nanosheet arrays (h-rGO@MoS2) are constructed via a dual-template approach and employed as bifunctional HER catalyst and supercapacitor electrode material. Because of the expanded interlayer spacing in MoS2 nanosheets and more exposed electroactive S–Mo–S edges, the constructed h-rGO@MoS2 architectures exhibit enhanced HER performance. Furthermore, benefiting from the synergistic effect of the improved conductivity and boosted specific surface areas (144.9 m2 g−1, ca. 4.6-times that of pristine MoS2), the h-rGO@MoS2 architecture shows a high specific capacitance (238 F g−1 at a current density of 0.5 A g−1), excellent rate capacitance, and remarkable cycle stability. Our synthesis method may be extended to construct other vertically aligned hollow architectures, which may serve both as efficient HER catalysts and supercapacitor electrodes