光催化
纳米颗粒
人体净化
光降解
活性氧
化学
光化学
纳米医学
化学工程
纳米技术
材料科学
催化作用
有机化学
废物管理
生物化学
工程类
作者
Moreno Guernelli,Arianna Menichetti,Gloria Guidetti,Paolo Emidio Constantini,Matteo Calvaresi,Alberto Danielli,Raffaello Mazzaro,Vittorio Morandi,Marco Montalti
标识
DOI:10.1002/chem.202200118
摘要
Photogeneration of Reactive Oxygen Species (ROS) finds applications in fields as different as nanomedicine, art preservation, air and water depollution and surface decontamination. Here we present photocatalytic nanoparticles (NP) that are active only at acidic pH while they do not show relevant ROS photo-generation at neutral pH. This dual responsivity (to light and pH) is achieved by stabilizing the surface of TiO2 NP with a specific organic shell during the synthesis and it is peculiar of the achieved core shell-structure, as demonstrated by comparison with commercial photocatalytic TiO2 NP. For the investigation of the photocatalytic activity, we developed two methods that allow real time detection of the process preventing any kind of artifact arising from post-treatments and delayed analysis. The reversibility of the pH response was also demonstrated as well as the selective photo-killing of cancer cells at acidic pH.
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