Hydrothermally Grown SnO₂ Flowers as Efficient Electrode Modifier for Simultaneous Detection of Catechol and Hydroquinone

Tin oxide (SnO 2 ) flowers were synthesized by hydrothermal method using SnCl 2 .H 2 O as precursor. The formation/phase purity of the hydrothermally grown SnO 2 flowers was determined by PXRD analysis. The morphological surface structure of SnO 2 flowers was checked by SEM analysis whereas the surface area was examined by BET analysis. Further, SnO 2 flowers were deposited on the neat and clean surface of the glassy carbon electrode using drop casting method. This constructed electrode was employed for simultaneous sensing of catechol and hydroquinone using cyclic and square wave voltammetry. The fabricated electrode exhibited good limit of detection of 3.74 μM and 1.12 μM toward catechol and hydroquinone sensing respectively. Moreover, this SnO 2 flowers modified glassy carbon electrode also shown good selectivity, repeatability and stability for the simultaneous determination of catechol and hydroquinone.