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·1516· 精细化工 FINE CHEMICALS 第 35 卷

图 8 结果显示，未煅烧的材料在 5 h 之后 E. coli [8] Yemmireddy V K, Hung Y C. Photocatalytic TiO 2 coating of plastic
存活率为 58.37%。而经过 200~600 ℃煅烧后制得材 cutting board to prevent microbial cross-contamination[J]. Food
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料，经可见光催化反应 5 h，E. coli 的存活率分别为 [9] Wang Wenguang (王文广). Preparation and photocatalytic activity
55.48%、53.55%、47.78%、0.304%、39.82%和 28.21%。 of Titanium dioxide-based composite photocatalysts[D]. Wuhan
University of Technology(武汉理工大学), 2012.
并随着光照时间的增长，发现材料产生的•OH 越多，
[10] Yang Pengfei(阳鹏飞), Sun Xunkai(孙允凯), Ke Guojun(柯国军).
其抗菌性能就越好，例如：在 450 ℃煅烧下的 Preparation and photocatalytic activity of Ag/TiO 2/AC photo-catalyst
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反应 5 h，E. coli 的存活率为 0.304%，与 2.6 小节羟 [11] Kim B, Kim D, Cho D, et al. Bactericidal effect of TiO 2 photocatalyst
基自由基的检测相互印证。这一结果更验证了以前 on selected food-borne pathogenic bacteria[J]. Chemosphere, 2003,
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互匹配，从而增加两者电子和空穴的分离效率，使
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本研究制备了一系列的粒径 20~50 nm的 Au/TiO 2
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coli 存活率 32.0%）。相对于单相二氧化钛与金复合
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材料，双相二氧化钛与金复合材料具有良好的 SPR photocatalytic degradation of the cells of elected microorganisms[J].
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优异的抗菌性能，减少成本更具有实际使用价值。 ultraviolet light[J]. Process Biochemistry, 2003, 39(4): 475-481.
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