首页|Promoted Non-enzymatic Glucose Sensor Based on Synergistic Effect of Hydrothermal Synthesized Ni(OH)2-Graphene Nanocomposite
Promoted Non-enzymatic Glucose Sensor Based on Synergistic Effect of Hydrothermal Synthesized Ni(OH)2-Graphene Nanocomposite
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Although glucose electrochemical sensors based on enzymes play a dominant role in market,their stability remains a problem due to the inherent nature of enzymes.Therefore,glucose sensors that are independent on enzymes have attracted more attention for the development of stable detection devices.Here we present an enzyme-free glucose sensor based on Ni(OH)2 and reduced graphene oxide(rGO).The as-fabricated sensor still exhibits excellent electrocatalytic activity for detecting glucose under enzyme independent conditions.The enhanced catalytic performance may due to synergistic effect as follows:(ⅰ)the interaction between the Ni2+and π electron of graphene induces the formation of the β-phase Ni(OH)2 with higher catalytic activity;(ⅱ)the frozen dry process works as a secondary filtration,getting rid of poorly formed Ni(OH)2 particles with low catalytic activity;(ⅲ)the rGO network with good conductivity provides a good electronic pathway for promoting electron transfer to reduce the response time.Based on the synergistic effect,the sensor exhibits a wide linear detection range from 0.2 μmol/L to 1.0 μmol/L and a low detection limit(0.1 μmol/L,S/N=3).The excellent detection performance,as well as the easy and low-cost preparation method,suggests the promising applicability of the sensor in the glucose detection market.
NETL
NSTL
万方数据
