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Visible-light-mediated antifungal bamboo based on Fe-doped TiO2 thin films

机译：基于Fe掺杂TiO2薄膜的可见光介导的抗真竹

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TiO2-based photocatalytic disinfection has been proved as one of the feasible approaches for the control and inhibition of the growth of mould fungi on woody materials. However, the wide band gap of TiO2 (3.2 eV) limits the efficient absorption of sunlight in the visible region. In this study, visible-light-mediated antifungal bamboo based on Fe-doped TiO2 thin films was successfully fabricated through a facile one-step homogeneous precipitation method. XRD studies confirmed that all of the as-prepared TiO2 nanoparticles on the bamboo surface were anatase phase. Fe-doped TiO2 thin films were found to grow on the bamboo surface by the self-aggregation of nanoparticles with an average diameter of about 9.7 nm and a surface area of about 90.96 m(2) g(-1). The Fe-doped TiO2/bamboo samples looked identical to original bamboo as there was no essential effect on the optical properties of the bamboo surface. Moreover, the antifungal activity of the as-prepared samples against mould fungi was investigated under natural weather conditions. Compared with original bamboo and TiO2/bamboo, the Fe-doped TiO2/ bamboo exhibited much higher inhibition ability to mould fungi under the natural environment, which is due to the fact of the red shift of the absorption edge of the Fe-doped TiO2 nanostructures on the bamboo surface. UV-vis DRS also revealed that the band gap of Fe-doped TiO2 nanostructures was obviously decreased, extending the light response of TiO2 from ultraviolet to the visible light region. The research result may provide a general and effective approach to prepare visible-light-driven photocatalysts used for inhibition of the growth of mould fungi on the surface of bamboo.
机译：基于TiO2的光催化消毒已被证明是控制和抑制木质材料霉菌生长的可行方法之一。然而，TiO2（3.2eV）的宽带隙限制了可见区域中的阳光的有效吸收。在该研究中，通过舒适的一步均匀沉淀法成功制造了基于Fe掺杂TiO2薄膜的可见光介导的抗真菌竹。 XRD研究证实，竹表面上的所有原制TiO2纳米颗粒都是锐钛矿相。发现Fe掺杂的TiO 2薄膜通过纳米颗粒的自聚集在竹表面上生长，平均直径为约9.7nm，表面积为约90.96m（2）g（-1）。 Fe掺杂的TiO2 /竹子样品看起来与原始竹子相同，因为对竹表面的光学性质没有必要的影响。此外，在自然的天气条件下研究了对模具真菌的制备样品的抗真菌活性。与原竹和TiO2 /竹子相比，Fe-Doped TiO2 /竹子在自然环境下表现出霉菌真菌的抑制力量更高，这是由于Fe掺杂TiO2纳米结构的吸收边缘的红色移位的事实在竹表面。 UV-VIS DRS还显示出Fe掺杂TiO2纳米结构的带隙明显降低，从紫外线延伸到可见光区域的TiO 2的光响应。研究结果可以提供一般有效的方法，用于制备可见光催化的光催化剂，用于抑制竹子表面的霉菌生长。

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  • 来源
    《RSC Advances》 |2017年第87期|共10页
  • 作者

    Li Jingpeng; Ren Danjing; Wu Zaixing; Huang Chengjian; Yang Huimin; Chen Yuhe; Yu Hui;

  • 作者单位

    China Natl Bamboo Res Ctr Key Lab High Efficient Proc Bamboo Zhejiang Prov Hangzhou 310012 Zhejiang Peoples R China;

    China Natl Bamboo Res Ctr Key Lab High Efficient Proc Bamboo Zhejiang Prov Hangzhou 310012 Zhejiang Peoples R China;

    China Natl Bamboo Res Ctr Key Lab High Efficient Proc Bamboo Zhejiang Prov Hangzhou 310012 Zhejiang Peoples R China;

    China Natl Bamboo Res Ctr Key Lab High Efficient Proc Bamboo Zhejiang Prov Hangzhou 310012 Zhejiang Peoples R China;

    China Natl Bamboo Res Ctr Key Lab High Efficient Proc Bamboo Zhejiang Prov Hangzhou 310012 Zhejiang Peoples R China;

    China Natl Bamboo Res Ctr Key Lab High Efficient Proc Bamboo Zhejiang Prov Hangzhou 310012 Zhejiang Peoples R China;

    China Natl Bamboo Res Ctr Key Lab High Efficient Proc Bamboo Zhejiang Prov Hangzhou 310012 Zhejiang Peoples R China;

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