Highly photocatalytic performance of flexible 3 dimensional (3D) ZnO nanocomposite

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• 作者：Hyun Uk Lee ; So Young Park ; Soon Chang Lee ; Jung Hye Seo ; Byoungchul Son ; Hyeran Kim ; Hyung Joong Yun ; Go Woon Lee ; Sang Moon Lee ; Bora Nam ; Jae Won Lee ; Yun Suk Huh ; Cheolho Jeon ; Hae Jin Kim ; Jouhahn Lee
• 关键词：Zinc oxide ; Photocatalyst ; Nanostructure ; Photocatalytic activity
• 刊名：Applied Catalysis B: Environmental
• 出版年：2014
• 出版时间：January, 2014
• 年：2014
• 卷：144
• 期：Complete
• 页码：83-89
• 全文大小：2998 K

文摘

Zinc oxide (ZnO) is one of the most powerful materials for purifying organic pollutants using photocatalytic activity. In this study, we have introduced a novel method to design highly photoreactive flexible 3 dimensional (3D) ZnO nanocomposite [F-ZnO-m (m: reaction time, min)] by electrospinning and simple-step ZnO growth processing (one-step ZnO seed coating/growth processing). Significantly, the F-ZnO-m could be a new platform (or candidate) as a photocatalytic technology for both morphology control and large-area production. The highest photocatalytic degradation rate ([k]) was observed for F-ZnO-m at 2.552 h^?1, which was 8.1 times higher than that of ZnO nanoparticles (NPs; [k] = 0.316 h^?1). The enhanced photocatalytic activity of F-ZnO-m may be attributed to factors such as large surface area. The F-ZnO-m is highly recyclable and retained 98.6 % of the initial decolorization rate after fifteen cycles. Interestingly, the F-ZnO-m samples show very strong antibacterial properties against both Gram-negative Escherichia coli (E. coli) and Gram-positive Staphylococcus aureus (S. aureus) after exposure to UV-light for 30 min. The antibacterial properties of F-ZnO-m samples are more effective than those of ZnO NPs. More than 96.6 % of the E. coli is sterilized after ten cycles. These results indicate that F-ZnO-m samples might have utility in several promising applications such as highly efficient water/air treatment and inactivation of pathogenic microorganisms.