Wu Pinggui, Xie Rongcai, Imlay Kari, Shang Jian Ku
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
J Am Ceram Soc. 2009 Aug 1;92(8):1648-1654. doi: 10.1111/j.1551-2916.2009.03069.x.
Palladium-modified nitrogen-doped titanium dioxide (TiON/PdO) foams were synthesized by a sol-gel process on a polyurethane foam template. The TiON/PdO foam was tested for microbial killing using Escherichia coli cells as a target. Under visible-light illumination, the TiON/PdO foam displayed a strong antimicrobial effect on the bacteria cells in water. The antimicrobial effect was found to be dependent on the palladium content and the calcination temperature. In a flow-through dynamic photoreactor, the new photocatalyst efficiently inactivated E. coli within a short contact time (< 1 min), the shortest ever reported for photocatalytic killing of bacteria. The strong antimicrobial functions of the TiON/PdO foam were related to the charge trapping by PdO and to the high contact efficiency of the foam structure.
通过溶胶 - 凝胶法在聚氨酯泡沫模板上合成了钯改性的氮掺杂二氧化钛（TiON/PdO）泡沫。以大肠杆菌细胞为靶标，对TiON/PdO泡沫进行了杀菌测试。在可见光照射下，TiON/PdO泡沫对水中的细菌细胞表现出强烈的抗菌作用。发现抗菌效果取决于钯含量和煅烧温度。在流通式动态光反应器中，这种新型光催化剂在短接触时间（<1分钟）内就能有效灭活大肠杆菌，这是光催化杀灭细菌报道中最短的接触时间。TiON/PdO泡沫的强抗菌功能与PdO的电荷俘获以及泡沫结构的高接触效率有关。
