Progress in sonochemical fabrication of nanostructured photocatalysts

Ultrasonic-induced disorder engineering on ZnO, ZrO2, Fe2O3 and SnO2 nanocrystals

“…15 In photocatalytic process, semiconductor catalyst should harvest light with energy larger than its band gap to produce excited electrons and holes, and part of the photo-generated charges could transfer to the surface of photocatalyst before they are annihilated in the recombination and combine with adsorbed species to produce some powerful radicals, which enables a series of oxidative and reductive reactions applicable for pollutant degradation. 16 Therefore, improving the optical absorption properties and reducing electron-hole recombination are signicantly expected factors for superior photocatalyst. 17 Ultrasonic irradiation is a unique technology to fabricate nanomaterials with special physical and chemical characters.…”

Synthesis of Photoactive Materials by Sonication: Application in Photocatalysis and Solar Cells

“…It is interesting to notice that 3 have been recently explored because they exhibit suitable properties for photocatalytic hydrogen evolution from water splitting [32]. The results confirm that SrZrO 3 was stable with time of hydrogen evolution and a very high rate (35 lmol g -1 h -1 ) was exhibited by SrZrO 3 prepared by ultrasound-assisted synthesis.…”

“…The phenomenology of fabrication of highly efficient photocatalysts through an ultrasound route represents a very interesting and important area in science and technology, and it holds great potential for photocatalysts preparation in the near future [1][2][3]. In comparison with traditional sources of energy, ultrasound ensures unusual reaction conditions in liquid phase reactions due to the cavitation phenomenon (extremely high temperatures and pressures are formed in very short times in liquids) [3,4].…”

“…In comparison with traditional sources of energy, ultrasound ensures unusual reaction conditions in liquid phase reactions due to the cavitation phenomenon (extremely high temperatures and pressures are formed in very short times in liquids) [3,4]. Furthermore, application of ultrasound irradiation to a photocatalytic system might enhance both the bulk and localized mass transport and consequently expedite the molecular contact and the photocatalytic activity [1,2,[4][5][6].…”

Synthesis of Photoactive Materials by Sonication: Application in Photocatalysis and Solar Cells

“…In comparison with traditional sources of energy, ultrasound ensures unusual reaction conditions in liquid phase reactions due to the cavitation phenomenon (extremely high temperatures and pressures are formed in very short times in liquids) [3, 4]. Furthermore, application of ultrasound irradiation to a photocatalytic system might enhance both the bulk and localized mass transport and consequently expedite the molecular contact and the photocatalytic activity [1, 2, 4–6].…”