Journal
CHEMISTRYSELECT
Volume 2, Issue 20, Pages 5707-5715Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201700873
Keywords
Biosensor; Density Function Theory; Glucose sensor; Nanorods; Spinel
Categories
Funding
- DST (Government of India) [SR/S2/RJN-21/2012]
- DST-SERB Fast-track Young Scientist [SB/FTP/PS-065/2013]
- UGC-UKIERI thematic awards [UGC-2013-14/005]
- BRNS-DAE [37(3)/14/48/2014-BRNS/1502]
- Indo-US Science and Technology Forum (IUSSTF) through a joint INDO-US center grant
- Ministry of Human Resources Development (MHRD), India through a center of excellence grant
Ask authors/readers for more resources
Here we report a facile and novel hydrothermal method to grow MnWO4 nanorods and their electrochemical glucose sensing and supercapacitor properties have been investigated. MnWO4 nanorods exhibited good glucose sensing performance with sensitivity of 13.7 mu A mu M(-1)cm(-2) in the 5-110 mu M linear range and specific capacitance of 199 F/g at 2 mV/s and 256.41 F/g at 0.4 A/g. First principles simulations have also been carried out to qualitatively support our experimental observations by investigating the bonding and charge transfer mechanism of glucose on MnWO4 through demonstration of Partial Density of States and charge density distributions. Large Density of States near Fermi level and empty d states around 2 eV above Fermi level of Mnd orbital qualify MnWO4 as communicating media to transfer the charge from glucose by participating in the redox reactions. Insight into the electronic structure reveals that there is charge transfer from oxygen p orbital of glucose to d orbital of Mn. Also, the quantum capacitance of MnWO4 electrodes has been presented to justify its supercapacitor performance. The maximum quantum capacitance of 762 mu F/cm(2) is obtained which is mostly contributed by the d electrons of Mn. Our experimental data and theoretical insight strongly infer that MnWO4 has the potential to be tailored as efficient and high-performance glucose sensing and energy storage devices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available