| Title | Light-Activated Rapid Disinfection by Accelerated Charge Transfer in Red Phosphorus/ZnO Heterointerface |
| Authors | Li, Jun Liu, Xiangmei Tan, Lei Liang, Yanqin Cui, Zhenduo Yang, Xianjin Zhu, Shengli Li, Zhaoyang Zheng, Yufeng Yeung, Kelvin Wai Kwok Wang, Xianbao Wu, Shuilin |
| Affiliation | Tianjin Univ, Sch Mat Sci & Engn, Key Lab Adv Ceram & Machining Technol, Minist Educ China, Tianjin 300072, Peoples R China Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Sch Mat Sci & Engn,Hubei Key Lab Polymer Mat, Key Lab Green Preparat & Applicat Funct Mat,Minis, Wuhan 430062, Peoples R China Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China Univ Hong Kong, Li Ka Shing Fac Med, Dept Orthopaed & Traumatol, Pokfulam, Hong Kong 999077, Peoples R China |
| Keywords | disinfection heterointerfaces photocatalysis red phosphorus ZnO |
| Issue Date | 2019 |
| Publisher | SMALL METHODS |
| Abstract | A red phosphorus (RP)/ZnO heterojunction thin film is developed to harvest solar or light emitting diode (LED) light for rapid, effective, ecofriendly, lower-cost, and safe disinfection, which is convenient for universal and large-scale deposition. The most stable geometrical structure of the RP/ZnO heterojunction, i.e., an RP (001) plane and a ZnO (002) plane, exhibits charge redistribution largely at the interface region. Therefore, the effective interfacial charge transfer and the improved separation efficiency of photogenerated electron-hole pairs can strongly boost reactive oxygen species (ROS)-generation reactions to enhance photocatalytic bacterial inactivation. The excellent light-activated point-of use disinfection can be achieved even through LED light of phone. Additionally, the RP/ZnO heterojunction also possesses excellent solar light-to-heat conversion efficiency, leading to further lethality to bacteria through hyperthermia. Antibacterial efficacy of 99.96 +/- 0.03% against Staphylococcus aureus at 5 min and 99.97 +/- 0.02% against Escherichia coli at 4 min can be attributed to the synergetic antibacterial activity of solar photocatalysis and photothermal effect (more than 50 degrees C in 2 min). This platform provides a surface strategy for designing synergetic photocatalytic and photothermal materials to fully harvest solar energy for not only water disinfection but also antibacterial surfaces in medical facilities, touch screen devices, or seawater desalination. |
| URI | http://hdl.handle.net/20.500.11897/543667 |
| ISSN | 2366-9608 |
| DOI | 10.1002/smtd.201900048 |
| Indexed | ESCI |
| Appears in Collections: | 工学院 湍流与复杂系统国家重点实验室 |
