Preparation and Antibacterial Effect of Doped Tetra-Needle Like ZnO Whiskers
Preparation and Antibacterial Effect of Doped Tetra-Needle Like ZnO Whiskers
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DOI：
10.4028/www.scientific.net/msf.486-487.77
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发表时间：
2005-02
期刊：
影响因子：
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通讯作者：
Zuowan Zhou;J. Liu;L. Chu
中科院分区：
文献类型：
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作者：
Zuowan Zhou;J. Liu;L. Chu
用Al ~（3+）、Fe ~（3+）、Ag ~+掺杂四针状氧化锌晶须（T-ZnOw）。结果表明，Al主要以ZnAl 2 O 4第二相形式存在，Fe 3+主要固溶于ZnO晶须的晶格中，而银则以纳米颗粒的形式存在于ZnO晶须的针状表面。抗菌实验结果表明，Fe 3+掺杂的T-ZnOw和纳米银负载的ZnOw对金黄色葡萄球菌（ATCC 6538）、大肠杆菌（ATCC 25922）和白色念珠菌（ATCC 10231）均有明显的杀灭和抑制作用。相关掺杂的T-ZnOw的最小抑菌浓度（MIC）为55~440 PPM。进一步的实验表明，该制剂安全系数高，对动物的皮肤和眼睛无刺激性。在塑料、涂料、造纸、纸张等产品中，掺入2wt%的T-ZnOw，抑菌率可达99%以上。通过甲醛降解实验，考察了掺杂T-ZnOw对有机物的降解效果。并初步提出了这一机理，以解释这一现象及其影响。
Tetra-needle like zinc oxide whiskers (T-ZnOw) were doped with Al3+, Fe3+ or Ag+. The morphological structures and the doped ions were characterized, and the results indicated that mostof the Aluminum existed in a second phase of ZnAl2O4, most of the Fe3+ solid-solutioned into the crystal lattice and the silver generated as nano-particles on the surface of the needles of the ZnO whiskers. Anti-bacterial experiments gave the result that Fe3+ doped T-ZnOw and the nano-silver adnascent ZnOw had obvious effect of killing and inhibiting the bacteria such as Staphylococcus Aureus (ATCC 6538), Escherichia Coli (ATCC 25922) and Candida Albicans (ATCC 10231). The minimum inhibitory concentrations (MIC) of the related doping T-ZnOw were 55~440 PPM. Further experiments indicated that there appeared high margin of safety and no stimulation on skins or eyes for the tested animals. Products such as plastics, coatings, fibbers and papers containing 2wt% of the doped T-ZnOw had more than 99% efficiency for anti the mentioned bacteria. Effect of degradation of organic compound for the doped T-ZnOw was also evaluated by degradation of formaldehyde. The mechanism was tentatively put forward to explain the phenomena and the effect of antibiosis.