Abbasi Razan, Gnayem Hani, Sasson Yoel
Casali Center of Applied Chemistry, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel.
ACS Omega. 2022 Aug 15;7(34):29625-29633. doi: 10.1021/acsomega.2c01502. eCollection 2022 Aug 30.
Photocatalysis has an exceptional capacity to eliminate a wide range of harmful microorganisms and is proven to be superior over commonly used disinfection methods. A visible light-induced photocatalyst, the BiOClBr@gypsum hybrid composite, composed of microspheres (∼3 μm) molded with a gypsum composite as a honeycomb-shaped filter was proven to inactivate a large selection of bacteria including , and via remote photocatalysis. The chemical composition and morphology of the composite were unveiled with the help of scanning electron microscopy, transmission electron microscopy, N sorption, Fourier transform infrared spectroscopy, diffuse reflectance spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. After 6 h under ambient conditions, our system declined the number of viable bacteria by fourfold. A similar effect was observed at a low temperature, where we rapidly and completely diminished inside a refrigerator within 24 h of visible light illumination.
光催化具有卓越的能力来消除多种有害微生物，并且已被证明优于常用的消毒方法。一种可见光诱导的光催化剂，即BiOClBr@石膏杂化复合材料，由微球（约3μm）组成，这些微球由石膏复合材料模塑而成，呈蜂窝状过滤器，已被证明可通过远程光催化使大量细菌失活，包括大肠杆菌、金黄色葡萄球菌和枯草芽孢杆菌。借助扫描电子显微镜、透射电子显微镜、氮吸附、傅里叶变换红外光谱、漫反射光谱、X射线衍射和X射线光电子能谱揭示了该复合材料的化学成分和形态。在环境条件下6小时后，我们的系统使活菌数量减少了四倍。在低温下也观察到了类似的效果，在可见光照射24小时内，我们在冰箱内迅速且完全地减少了大肠杆菌的数量。
