Ultrasonic Activation of Au Nanoclusters/TiO₂: Tuning Hydroxyl Radical Production Through Frequency and Nanocluster Size.

ABSTRACT: This study explores the sonocatalytic activity of gold nanoclusters (Au NCs) combined with titanium dioxide (TiO₂) nanoparticles, forming Au NCs/TiO₂ composites. The hybrid material significantly enhances hydroxyl radical (•OH) generation under ultrasonic conditions, attributed to high-energy cavitation bubbles formed during ultrasonication. The effects of frequency (200, 430, and 950 kHz) and power were systematically evaluated on Au₁₄₄/TiO₂ composites, identifying 430 kHz as optimal for •OH production due to its efficient cavitation energy. Au₁₄₄ NCs function as electron traps, reducing electron-hole recombination in ultrasonically activated TiO₂, thereby improving charge separation and enhancing •OH generation. Size-depen

SUBMITTER: Tsurunishi T 

PROVIDER: S-EPMC11819690 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature