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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | You, Tianyou Zhou, Lei Hao, Nan Chen, Saibo Mao, Hanping Jiang, Ding Dai, Liming Du, Xiaojiao Wang, Kun |
| Description | Author Affiliation: Du X ( Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.); Jiang D ( School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China.); Chen S ( Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.); Dai L ( Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.); Zhou L ( Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.); Hao N ( Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.); You T ( Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.); Mao H ( Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.); Wang K ( Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China. Electronic address: wangkun@ujs.edu.cn.) |
| Abstract | Ceria nanomaterials for heterogeneous catalysis have attracted much attention due to their excellent properties and have been extensively applied in recent years. But the poor electron conductivity and the aggregation behavior severely affect their electrocatalytic performances. In this paper, we prepared a novel catalyst based on CeO nanocrystallines (CeO NCs) ensemble-on-nitrogen-doped graphene (CeO -NG) nanocomposites through a one-step heat-treatment without the need of the precursor. The results confirmed that the high dispersion of CeO NCs with the uniform size distribution of about 5nm on the surface of nitrogen-doped graphene (NG) sheets could be easily obtained via the one-step procedure and the resultant CeO -NG nanocomposites were an excellent electrode material possessing outstanding electrochemical features for electron transfer. Luminol, an important electroactive substance, was further chosen to inspect the electrocatalytic properties of the as-prepared CeO -NG nanocomposites. The studies showed that the presence of the NG in CeO -NG nanocomposites could facilitate the electrochemical redox process of luminol. Compared with pristine CeO NCs, the synthesized CeO -NG nanocomposites can enhance the electrochemiluminescence (ECL) intensity by 3.3-fold and decrease the onset ECL potential for about 72mV in the neutral condition. Employing above superiority, selecting cholesterol oxidase (ChOx) as the model oxidase, a facile ECL method for cholesterol detection with the CeO -NG nanocomposites as the matrix to immobilize enzyme ChOx was developed. The results demonstrated CeO -NG nanocomposites exhibited excellent performances in terms of sensitivity and catalytic activities, indicating that NG-based nanomaterials have great promise in electrocatalytic and enzymatic biosensing fields. |
| ISSN | 09565663 |
| Issue Number | Pt 1 |
| Volume Number | 89 |
| e-ISSN | 18734235 |
| Journal | Biosensors and Bioelectronics |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2017-03-15 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Biosensing Techniques Methods Cerium Chemistry Cholesterol Analysis Blood Graphite Milk Nanocomposites Animals Cholesterol Oxidase Electrochemical Techniques Enzymes, Immobilized Humans Luminescent Agents Luminescent Measurements Luminol Ultrastructure Nanoparticles Nanotechnology Nitrogen Journal Article Discipline Biotechnology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nanoscience and Nanotechnology Medicine Biophysics Biomedical Engineering Biotechnology Electrochemistry |
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