Harnessing ultrasound in photocatalysis: Synthesis and piezo-enhanced effect: A review

Future perspectives in green hydrogen production by catalyzed sono-photolysis of water

“…The authors proposed as a mechanism the US enhanced formation of ROS species such as (˙OH, ˙OOH, O 2 ˙ − ) able to easily oxidize Co 2+ to Co 3+ which was mainly responsible for the oxygen evolution reaction. 101 In 2017 Singh and Sinha reported the catalyzed sono-photolysis of water for the HER using CdS as a photocatalyst. The higher activity of H 2 production of horn US connected to a piezoelectric transducer working at 20 kHz and 40 W, with respect to the pure UV irradiation was attributed to a faster removal of bubbles of hydrogen from the surface of photocatalyst due to the mechanical energy associated with ultrasound able to overcome surface tension.…”

“…103 Those potentials induce flexures of the energy band, enhancing the photogenerated charge separation. 101 Furthermore, electronic jumps occur in the VB and CB of these materials providing additional electron–hole sources for the flow separation and transport. 104 Meng et al 105 showed 1.32-fold increase of methyl orange photodegradation by Pt/BaTiO 3 heterojunction fabrication for piezoelectric enhanced photocatalysis, and Liu et al 106 demonstrated 2.44 times higher photocatalysis activity due to the presence of the BaTiO 3 @ReS 2 Schottky heterostructure.…”

Piezocatalysis: a promising alternative route for CO2 reduction

“…Because most piezocatalysts are either semiconductors or insulators (Table 6), a strategy to improve the efficiency should be to introduce solar power as a ubiquitous renewable energy to generate more charge carriers via photon-induced bandgap excitations, as was demonstrated earlier in different piezo-photocatalytic systems. 26,73,74 Introducing solar power to assist in elevating the efficiency is indeed reasonable, because unlike conductors, semiconductors and insulators exhibit moderate and poor conductivity, respectively. They hardly permit mechanical energy and mechanically excited charges to easily flow through them for rapid conversion of mechanical energy to chemical energy.…”

Preparation of novel Au-Nb3O7F nanosheets for the photodegradation of tetracycline hydrochloride

“…Development of new efficient photocatalysts addressed to environmentally friendly processes, aiming at the elimination of organic pollutants and transformations of waste is still an emerging issue ( Yang et al, 2021a ; Shurbaji et al, 2021 ; Zhang Y. et al, 2022 ; De Ilurdoz et al, 2022 ; Balakrishnan et al, 2023 ; Li et al, 2023 ; Lanjwani et al, 2024 ; Vinayagam et al, 2024 ). Environmentally friendly semiconductors, such as TiO 2 , ZnO, Nb 2 O 5 , are efficient heterogeneous photocatalysts ( Lang et al, 2014 ; Ani et al, 2018 ; Anwer et al, 2019 ; Wetchakun et al, 2019 ; Jiang et al, 2020 ; Zhao et al, 2020 ).…”