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首页> 外文期刊>RSC Advances >Photocatalytic properties of polydopamine-modified Ag NP/TiO2 porous nanofibers prepared by electrospinning
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Photocatalytic properties of polydopamine-modified Ag NP/TiO2 porous nanofibers prepared by electrospinning

机译：聚二胺改性Ag / TiO2通过静电纺丝制备的聚二胺改性Ag / TiO2的光催化性能

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摘要

Polydopamine-modified Ag/TiO2 porous nanofibers (PDA-Ag/TiO2 porous NFs) were successfully prepared as a composite catalyst via a simple electrospinning process combined with an impregnation method. It was found that the PDA-Ag/TiO2 porous NFs present a corn-like, coarse, porous structure where the TiO2 NFs look like corn cobs and the Ag nanoparticles (NPs) act as corn kernels. In our research, carbon nanotubes (CNTs) were embedded during the original spinning as pores were formed using electrospinning. After calcination, the loss of the CNTs left a lot of holes in the internal structure of the TiO2 NFs that made the specific surface area increase by about 30 percent compared to the pure TiO2 NFs. Ag NPs embedded in the TiO2 NFs could prevent the recombination of electron-hole pairs generated from photocatalysis and could transfer the captured electrons to participate in the photocatalysis reaction process. The PDA which wrapped the TiO2 NFs homogeneously could adsorb organic matter and promote the spatial separation of photogenerated charges. The higher photocatalytic efficiency demonstrated a synergy between the Ag NPs and PDA with PDA playing the role of the gripper to capture organic molecules, and the Ag NPs doped in the TiO2 NFs acting as the electron conveyer which could restrain the recombination of electron-hole pairs. The new composite catalyst has potential application in cleaning up organic pollutants.
机译：通过简单的静电纺丝工艺与浸渍方法合并成功制备聚二氨基胺改性的Ag / TiO 2多孔纳米纤维（PDA-Ag / TiO 2多孔NFS）作为复合催化剂。发现PDA-Ag / TiO2多孔NFS存在玉米状，粗，多孔结构，其中TiO 2 NFS看起来像玉米棒子和Ag纳米颗粒（NPS）作为玉米粒。在我们的研究中，在原始纺丝期间嵌入碳纳米管（CNT），因为使用静电纺丝形成孔隙。煅烧之后，CNT的损失在二氧化钛的NF的内部结构由大约30％的比表面积的增加相比，纯TiO2的NF留下了许多孔。银纳米颗粒嵌入在二氧化钛的NF可以防止从光催化作用产生的电子 - 空穴对的再结合，并可能传送捕获的电子参与光催化反应过程。包裹TiO2 NFS的PDA均可吸附有机物并促进光生电电荷的空间分离。较高的光催化效率表现出的银纳米颗粒和PDA之间的协同作用与PDA玩抓取器的作用，以捕获有机分子，和银纳米颗粒掺杂的二氧化钛的NF充当电子输送这可能抑制电子 - 空穴对的再结合。新的复合催化剂具有清洁有机污染物的潜在应用。

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  • 来源
    《RSC Advances》 |2015年第126期|共8页
  • 作者

    Wang Huaiyuan; Jiang Feng; Zhu Yanji; Zhao Yanan;

  • 作者单位

    Northeast Petr Univ Coll Chem &

    Chem Engn Daqing 163318 Heilongjiang Pr Peoples R China;

    Northeast Petr Univ Coll Chem &

    Chem Engn Daqing 163318 Heilongjiang Pr Peoples R China;

    Northeast Petr Univ Coll Chem &

    Chem Engn Daqing 163318 Heilongjiang Pr Peoples R China;

    Northeast Petr Univ Coll Chem &

    Chem Engn Daqing 163318 Heilongjiang Pr Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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