Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5437986 | Ceramics International | 2017 | 39 Pages |
Abstract
A facile ultrasonic method has been successfully developed for the fabrication of multifunctional Fe3O4@carbon dot/Ag (Fe3O4@C-dot/Ag) nanocubes (NCs), and the resulting materials are well characterized using transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), Vibrating sample magnetometer (VSM) and fluorescence measurements. The Ag nanoparticles (NPs) are uniform and well dispersed on the surface of Fe3O4@C-dot, while maintaining the shape and the size of the core-shell Fe3O4@C-dot NCs. In addition, its catalytic activities are evaluated by measuring the reduction of p-nitroaniline (p-NA) and crystal violet (CV), and the composite materials exhibit excellent catalytic activity towards reduction of p-NA and CV dye, which is superior to most reported catalysts. The good catalytic performance of Fe3O4@C-dot/Ag NCs may be attributed to the specific characteristics of its nanostructure and the synergistic effect on the delivery of electrons between Ag NPs and Fe3O4@C-dot NCs. Furthermore, the as-prepared catalysts also show good activity for the reduction of other nitrobenzene analogs. The effect of solvent and reducing agent was also studied on the catalytic activity of Fe3O4@C-dot/Ag NCs. Most importantly, the Fe3O4@C-dot/Ag catalyst shows excellent recycling stabilities, which can be potentially applied in the fields of catalysis and green chemistry.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yali Guo, Dong Tang, Lilan Zhang, Bo Li, Anam Iqbal, Weisheng Liu, Wenwu Qin,