摘要
以硅藻土和硝酸银为主要原料,采用预先真空浸渍法和压制成型工艺,在1 050℃煅烧制备了纳米银/硅藻土复合抗菌陶瓷。用X射线衍射谱、扫描电子显微镜、压汞仪和电感耦合等离子体质谱仪等对材料性能进行表征,并测试了材料的抗菌性能。结果表明:纳米银/硅藻土复合抗菌陶瓷平均孔径为2.6μm,孔隙率为58%;银以Ag O的形式存在于材料中,Ag O颗粒分散均匀,粒径在20 nm左右,在水介质中材料能够持续稳定微量的释放出银;纳米银/硅藻土复合抗菌陶瓷对大肠杆菌和金黄色葡萄球菌均有很强的抑菌和杀菌能力,有望应用于终端水处理系统。
Silver nanoparticle/diatomite antibacterial ceramic composites were firstly prepared by a pre-vacuum dipping method and a dry pressing process, and then sintered at 1 050 ℃. The composites were characterized by X-ray diffraction, scanning electron microscopy, mercury injection analysis and inductively coupled plasma mass spectrometry, respectively. The antimicrobial properties against E.coli and S.aureus were tested. The results show the average pore diameter and porosity of prepared silver nanoparticle/diatomite antibacterial ceramic composites are 2.6 μm and 58%, respectively. The state of silver in the material is divalent silver oxide （AGO） with a particle size of around 20 nm, and the trace amount of silver ions can be released continuously and stably in water. The prepared composite exhibits a high inhibiting effect and antibactericidal ability against E.coli and S.aureus. Hence, the silver nanoparticle/diatomite antibacterial ceramic composites prepared are a promising candidate material for point-of-use water treatment.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2016年第3期425-431,共7页
Journal of The Chinese Ceramic Society
关键词
硅藻土
银
抗菌
水处理
diatomite
silver
antibacterial activity
water treatment
