TiO2 treatment using ultrasonication for bubble cavitation generation and efficiency assessment of a dye-sensitized solar cell

Abstract

Graphical abstract

Scale-up disaggregation of palygorskite crystal bundles via ultrasonic process for using as potential drilling fluid

“…Ultrasonic wave is a high frequency (above 20 kHz) and short-wavelength (even a few micrometers) sound wave with good directionality, strong penetrability, and concentrated energy [20] , [21] . When ultrasonic wave propagates in a medium, especially in a liquid medium and heterogeneous phases interfaces, a series of spectacular cavitation phenomena occur continuously and locally on a micro-scale, such as extremely high local temperature and pressure, high shear stress near the bubble wall, and micro-jets near the solid surface caused by asymmetric collapse of bubble and turbulence [22] , [23] , [24] .…”

Ultrasonication‐Induced Strong Metal‐Support Interaction Construction in Water Towards Enhanced Catalysis

“…First, the collapse of cavitation bubbles can induce high-speed inter-particle collisions and shock waves that produce surface damage increasing oxygen vacancy formation. [35,36] The formation of oxygen vacancies has been computationally determined to be more energetically favorable in metal doped TiO 2 than the pure anatase phase in high energy environments regardless of oxidative or reductive conditions. [37] Moreover, the ultrasonication of water produces low intensity UV photons via the collapse of cavitation bubbles, and the UV treatment of TiO 2 can generate oxygen vacancies, reductive electrons, and Ti 3 + species.…”

Ultrasonic Cleaner Dilengkapi Heater dan Pembuangan Air Otomatis Berbasis Mikrokontroller

“…Ultrasonic cleaner yang dirancang menggunakan gelombang ultrasonic dengan frekuensi 40 kHz [2,12]. Untuk mempersingkat waktu pembersihan, alat ini menggunakan metode cavitation yakni pemanfaatan pemanas dengan suhu 50℃ bertujuan agar cairan pembersih mudah larut sehingga dapat melebur kesegala arah pada instrument bedah yang sedang dibersihkan [9,13,14]. Selain itu, sistem pembuangan air secara otomatis juga dirancang untuk menghindari kontak langsung antara tenaga medis dengan peralatan medis, karena virus atau bakteri dapat menempel pada peralatan setelah operasi.…”