Journal
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 81, Issue -, Pages 452-458Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.msec.2017.08.053
Keywords
P-doped graphene; Electrochemical sensor; Dopamine detection; Electrocatalytic activity
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Funding
- National Science Foundation of China [51501083]
- Gansu Provincial Science and Technology Department [1606RJZA097]
- Gansu Provincial Education Department [2015A-061]
- Lanzhou Jiaotong University [2014015]
- Science and Technology Department of Hebei Province [152111230]
- Health Department of Hebei Province [20160030]
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Heteroatom doping is an effective strategy to enhance the catalytic activity of graphene and its hybrid materials. Despite a growing interest of P-doped graphene (P-G) in energy storage/generation applications, P-G has rarely been investigated for electrochemical sensing. Herein, we reported the employment of P-G as both metal-free catalyst and metal catalyst support for electrochemical detection of dopamine (DA). As a metal-free catalyst, P-G exhibited prominent DA sensing performances due to the important role of P doping in improving the electro-catalytic activity of graphene toward DA oxidation. Furthermore, P-G could be an efficient supporting material for loading Au nanoparticles, and resulting Au/P-G hybrid showed a dramatically enhanced electrocatalytic activity and extraordinary sensing performances with a wide linear range of 0.1-180 mu M and a low detection limit of 0.002 mu M. All these results demonstrated that P-G might be a very promising electrode material for electrochemical sensor applications.
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