Abstract
The present work reports the photoelectrocatalytic properties of pyrolyzed molybdenum oxide thin film. Microstructural analysis revealed clustered nanoaggregates. Structural analysis showed a polycrystalline $$\alpha$$ -MoO3 phase. The crystallite size, dislocation density, microstrain, and stacking faults were found to be 41.27 nm, 5.87 × 10−4 lines/cm2, 8.41 × 10−4 and 1.78, respectively. The optical bandgap was found to be 3.20 eV. Linear sweep voltammetry measurement in 1 M KOH electrolyte revealed a significant photocurrent density of 992.39 μA/cm2 at a bias of 1.2 V versus Ag/AgCl (1.4 V vs. RHE). The reasonable performance of the device suggests that the rarely deployed spray pyrolysis method is promising for preparing photoactive $$\alpha$$ -MoO3 films for photoelectrochemical measurement.
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