TiO2-based composites are potential materials for dye solar cells. Here we report a new method for synthesizing a new composite material based on molybdenum and titanium oxides. Low-temperature underwater direct current plasma is used as a synthesis method, and Mo and Ti wires were as electrodes. The polarity of the electrode affects the nature of the array. It was found that with the positive polarity of the molybdenum electrode (anode), MoO3 decorated with rutile is formed. The mixed-phase TiO2 decorated MoOx (x = 2.75–2.85) is formed by the negative polarity Mo of the electrode (cathode). The synthesized composites show improved characteristics in the photocurrent response and photovoltaics.
