Related Experiment Video
Updated: Jan 25, 2026

Solution-Processed "Silver-Bismuth-Iodine" Ternary Thin Films for Lead-Free Photovoltaic Absorbers
Published on: September 27, 2018
Bismuth titanate-based UV filters embedded mesoporous silica nanoparticles: Role of bismuth concentration in the
Gloria Zaccariello1, Michele Back2, Alvise Benedetti2
1Department of Molecular Sciences and Nanosystems and Centro di Microscopia Elettronica "Giovanni Stevanato", Ca' Foscari University of Venice, Via Torino 155/b, I-30170 Venezia-Mestre, Italy; Department of Informatics and Environmental Sciences, Kyoto Prefectural University, 1-5, Shimogamo Nakaragi-cyo, Sakyo-ku, 606-8522 Kyoto, Japan.
Abstract:
The development of new safe inorganic UV filters to effectively protect the skin from ultraviolet (UV) radiation effects is an emerging issue. Bismuth titanate-based UV filters embedded into mesoporous silica nanoparticles (MSN) represent a new class of inorganic sunscreens, with excellent UVA and UVB shielding properties. In addition, the presence of bismuth ions promotes a self-sealing process, allowing (i) the entrapment of the active phases in the deepest core of the system and (ii) the formation of an external glassy silica layer with a consequent suppression of the photocatalytic activity. In this work, aimed at studying in detail the self-sealing mechanism and accessing the role of bismuth ions in the formation of the system, a series of samples impregnated with a different amount of bismuth were investigated. The self-sealing process already occurs at the lowest content of bismuth and the mechanism is demonstrated to be triggered by the ability of Bi to work as a low-melting point agent for silica. Finally, a sunscreen formulation containing the new UV filter was prepared and the Sun Protection Factor (SPF), the pH and the viscosity were measured, demonstrating the potential of the proposed material for large-scale applications.
More Related Videos
Related Concept Videos
Role-Based Identity
Role of Communication in the Nursing Process I: Assessment and Diagnosis
The nursing process considers the patient's emotional and physical well-being. The process can be repeated or stopped at any point if judged essential. Assessment is the first step in the nursing...
Role of Communication in the Nursing Process II: Planning and Implementation
Passive Filters
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
Role of Communication in the Nursing Process III: Evaluation and Documentation
Active Filters

