Introduction: The fundamental characteristics of multifunction cavitation were investigated,
and the photocatalytic performance of titanium oxide particles was found to be remarkably
enhanced following treatment with this technique.
Method: In this work, ultrasonic irradiation of a waterjet during floating cavitation was used to
generate microjets with hot spots. Hot working can be performed at the nanoscale on a material
surface using this multifunction cavitation process, resulting in morphological changes and variations
in the surface electrochemical characteristics. The relative extents of hot treatment by hot
spots in the microjet and high pressure working of the material can be tuned by varying both the
waterjet and ultrasonication power.
Result and Conclusion: The quantities of hydrogen and oxygen generated from titanium dioxide
particles treated by multifunction cavitation in response to UV and visible light irradiation were
remarkably increased compared to the amounts produced by particles treated by conventional
water jet processing.
Keywords: Multifunction cavitation, water jet cavitation, ultrasonic cavitation, mechanicalelectrochemical
cavitation, photocatalyst, titanium oxide.
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