报告人：杨英男教授

报告人单位：日本筑波大学

报告时间：10月26号下午16:30

地点：润德楼B512学术报告厅

举办单位：材料科学与工程学院

报告人简介

杨英男，日本筑波大学教授，现任日本国家科学技术振兴会科研基金评审专家，日本生物工学会评议专家，日本化学工学会评议专家，Grand Renewable Energy International Conference组织委员会Biomass分会主席，2011-2023年中日韩生命環境国际论坛组委会代表。

主要从事新型环境材料，特别是可利用太阳光的高效稳定型光触媒的开发以及环境修复污染控制与生物资源的有效利用等领域的研究。开发了多种高性能光触媒材料以及系统，并成功地用于健康，环境以及能源领域。在日本负责和参与多项国家及各部委的重大研究项目。研究成果曾多次获得日本及国际奖。累计在国际著名学术期刊发表学术论文180多篇，受邀在国际重要学术会议做邀请及大会报告30多次、取得日本国家专利8项。已经培养博士后，博士研究生40多人，毕业硕士研究生50多人。

课题组网页：https://nc-bsys.tsukuba.ac.jp/yanglab/English

报告内容简介

In this study, an effective visible light-assisted photocatalytic disinfection toward various representative pathogenic bacteria over a highly reusable glue-immobilized P/Ag/Ag₂O/Ag₃PO₄/TiO₂(PAgT) system has been reported. The results showed that the PAgT photocatalyst could rapidly kill all pathogenic bacteria isolated from real water environment, including Gram-positive (+ve) (Enterococcus sp. and Staphylococcus aureus) and Gram-negative (-ve) (Escherichia coliandSalmonella), both in single and mixed bacteria system. Compared to Gram -ve bacterium, the inactivation of Gram +ve bacterium was more resistant to the photocatalytic treatment, which was mainly ascribed to their thicker peptidoglycan layers in cell walls. In addition, using silicone glue as a binder provided a strong adhesion between the solid matrix and catalyst particles thus making the immobilized PAgT highly reusable. More strikingly, it was found that the enhanced antibacterial performance of immobilized PAgT system was due to a synergistic effect of disinfection mechanism combining the improved photocatalysis on the introduction of heterojunction structure, and the mechanical stress driven from the composite sharp edge morphology. Hence, the present results of the photocatalytic disinfection toward a broad range of pathogenic bacteria, with excellent activity, stability and reusability, reveals the possibility of the developed silicone glue-immobilized PAgT in real water sterilization.