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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Dong, Yongping Gao, Tingting Zhou, Ying Wang, Chengming Chu, Xiangfeng |
| Description | Author Affiliation: Dong Y ( School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China. Electronic address: dongyp@ahut.edu.cn.); Gao T ( School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China.); Zhou Y ( School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China.); Chu X ( School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China.); Wang C ( Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, Hefei 230026, China. Electronic address: chmwang@ustc.edu.cn.) |
| Abstract | Gold nanoparticle/graphene (GNP/GR) nanocomposite was one-pot synthesized from water soluble graphene and HAuCl4 by hydrothermal method and characterized by TEM, Raman spectroscopy, XRD, XPS, UV-vis spectroscopy, and electrochemical impedance spectroscopy (EIS). Electrogenerated chemiluminescence (ECL) of luminol was investigated at the GNP/GR modified glassy carbon electrode (GNP/GR/GCE) and the GNP modified glassy carbon electrode (GNP/GCE) in aqueous solution respectively. The results revealed that one strong anodic ECL peak could be observed at â ¼0.8 V at two modified electrodes compared with that at the bare electrode. The intensity of the anodic ECL at the GNP/GR/GCE is weaker than that at the GNP/GCE, which should be due to the synergic effect of the enhancing effect of gold nanoparticles and the inhibiting effect of graphene on anodic luminol ECL. One strong cathodic ECL peak located at â ¼-0.8 V could be observed at the GNP/GR/GCE but not at the GNP/GCE, which should be result from the adsorbed oxygen at the graphene film. In the presence of ascorbic acid, the anodic ECL at the GNP/GR/GCE was enhanced more than 8-times, which is more apparent than that at the GNP/GCE. Whereas, the cathodic ECL peak was seriously inhibited at the GNP/GR/GCE. The enhanced ECL intensity at the GNP/GR/GCE varied linearly with the logarithm of ascorbic acid concentration in the range of 1.0 × 10(-8) to 1.0 × 10(-6)mol L(-1) with a detection limit of 1.0 × 10(-9) mol L(-1). The possible ECL mechanism was also discussed. |
| ISSN | 13861425 |
| Volume Number | 134 |
| e-ISSN | 18733557 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2015-01-05 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Ascorbic Acid Analysis Electrochemical Techniques Instrumentation Electrodes Luminescent Measurements Methods Luminol Chemistry Dielectric Spectroscopy Equipment Design Gold Graphite Limit Of Detection Nanoparticles Spectrophotometry, Ultraviolet Spectrum Analysis, Raman X-ray Diffraction Journal Article Research Support, Non-u.s. Gov't Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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