In order to improve the regularity of silver nanowires and enhance their adhesion with substrates, potentiostatic electrodepposition is used. Different morphology and size of nano silver are fabricated using a modified anodic aluminum oxide/polyvinyl alcohol/fluorine-doped tin oxide (AAO/PVA/FTO) composite templates. Silver nanowires arrays with uniform lengths of 20-25 μm on PVA/FTO are obtained by a 60 min deposition of silver in the tempalte which confirmed by field emission scanning electron microscopy (FESEM). Amperometric responses of formaldehyde electrooxidation are conducted on this silver nanowires arrays electrode. Chronoamperometric results demonstrated that the proposed electrode could be used as a sensor for sensitive detection of formaldehyde at concentration range of 0.1-3.7 mmol/L with the sensitivity and detection limit of 48.9660 μA·cm-2·(mmol/L)-1 and 6.48×10-3 mmol/L respectively. The developed electrode also exhibited a high selectivity for formaldehyde comparing with acetaldehyde, ethanol and butanol. In addition, the preparation of the promising silver nanowires sensor is very simple.
National Natural Science Foundation of China (51272010); Beijing Nova Program (XX2013009); Specialized Research Fund for the Doctoral Program of Higher Education of China (20121102120001); Program for New Century Excellent Talents in University(NCET-12-0035)
LIANG Shu,CHEN Aihua. Fabrication of Silver Nanowires Electrode on FTO Substrates and Studies on Its Electrocatalytic Activity for Formaldehyde Electrooxidation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA,
2014, 35(10): 2841-2849.