High-efficiency, Synergistic ZnO-Coated SiC Photocatalytic Filter with Antibacterial Properties

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• 作者：Jian Hu ; Zhaoxiang Zhong ; Feng Zhang ; Weihong Xing ; Wanqin Jin ; Nanping Xu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：June 15, 2016
• 年：2016
• 卷：55
• 期：23
• 页码：6661-6670
• 全文大小：685K
• 年卷期：0
• ISSN：1520-5045

文摘

A new composite ZnO-coated SiC filter with photocatalytic and antibacterial properties was prepared via a simple sol–gel method. The crystallinity, grain size, and ZnO loadings played important roles in the photocatalytic and antibacterial properties of as-prepared materials. The high-efficiency photocatalytic and antibacterial properties resulted from the active oxidizing reagents and released Zn²⁺, respectively. The possible formation of an n–p junction between n-type ZnO and p-type SiC filter support is considered as another reason for enhanced photocatalytic performance (i.e., the effective degradation of methyl orange (MO) solution). Antibacterial activity of as-prepared samples against Escherichia coli and Staphylococcus aureus (without UV light) were also examined; after 30 min sterilization, the samples removed a maximum of 97.6 and 99.9% of these bacteria, respectively.