کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5009052 | 1462039 | 2017 | 7 صفحه PDF | دانلود رایگان |
- Two-dimensional ultrathin MnO2 nanosheets were synthesized using a facile and efficient method.
- An ultrasensitive H2O2 nonenzymatic electrochemical sensor was constructed based on the ultrathin MnO2 nanosheets.
- The constructed sensor was applied to perform real-time monitoring trace concentration of H2O2 released by living cells with satisfactory results.
Using a facile and efficient method, two-dimensional (2D) ultra-thin MnO2 nanosheets were successfully prepared. Due to the large specific surface area and mesoporous structure, MnO2 nanosheet is a good candidate for use as an enhanced electrochemical sensing material. MnO2 nanosheets were immobilized onto glassy carbon electrodes with Nafion film to construct a H2O2 electrochemical nonenzymatic sensor. Amperometric study showed MnO2 nanosheets exhibited very high electrocatalytic activity towards H2O2 reduction. A very low detection limit (5 nM) was reached with a wide linear range (25 nM-2 μM and 10-454 μM) and a high sensitivity of 3261 mA Mâ1 cmâ2. The fabricated H2O2 sensor also exhibited excellent selectivity, good reproducibility and long-time stability. Furthermore, the constructed high sensitive sensor was successfully applied to perform real-time monitoring trace concentration of H2O2 released by SP2/0 cells, indicating that MnO2 nanosheets provide a new platform for developing high performance electrochemical sensors in biological applications.
Journal: Sensors and Actuators B: Chemical - Volume 252, November 2017, Pages 72-78