| Title |
Application of electroactive Au/aniline tetramer-graphene oxide composites as a highly efficient reusable catalyst |
| ID_Doc |
13597 |
| Authors |
Lai, GH; Chou, YC; Huang, BS; Yang, TI; Tsai, MH |
| Title |
Application of electroactive Au/aniline tetramer-graphene oxide composites as a highly efficient reusable catalyst |
| Year |
2021 |
| Published |
Rsc Advances, 11, 1 |
| DOI |
10.1039/d0ra08535a |
| Abstract |
This study proposes a cost-effective, energy-saving, and green process that uses pi-pi interactions to modify graphene oxide (GO), and the conjugate structure of aniline tetramer (AT) to enhance the dispersion of GO. Au/aniline tetramer-graphene oxide (Au/ATGO) composites were synthesized and applied as a catalyst in this study. The adsorption of AT on GO, via pi-pi interaction, formed ATGO composites. Subsequently, the amine group on ATGO was stably anchored on Au nanoparticles (Au NPs) to form Au/ATGO composites. The Au/ATGO composites were characterized and the electroactive properties determined by Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, and cyclic voltammetry. The Au/ATGO composites showed excellent performance and stability as catalysts when applied for the reduction of nitrophenol to aminophenol within 225 s and the rate constant was 0.02 s(-1). The activation energy for the reduction of 4-NP and 2-NP was 48.10 and 68.71 kJ mol(-1), respectively. Following a recycling test repeated 20 times, the Au/ATGO composites maintained a conversion rate higher than 94%. |
| Author Keywords |
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| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000614277900009 |
| WoS Category |
Chemistry, Multidisciplinary |
| Research Area |
Chemistry |
| PDF |
https://pubs.rsc.org/en/content/articlepdf/2021/ra/d0ra08535a
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