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首页> 外文期刊>Applied Surface Science >Ag_2O nanoparticles decorated TiO_2 nanofibers as a p-n heterojunction for enhanced photocatalytic decomposition of RhB under visible light irradiation
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Ag_2O nanoparticles decorated TiO_2 nanofibers as a p-n heterojunction for enhanced photocatalytic decomposition of RhB under visible light irradiation

机译：Ag_2O纳米颗粒修饰TiO_2纳米纤维作为p-n异质结，在可见光照射下增强RhB的光催化分解。

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摘要

TiO2 nanofibers were successfully prepared by electrospinning method using tetrabutyl titanate, glacial acetic acid, PVP and methanol as the precursors. Ag2O/TiO2 composite nanofibers were then prepared by decorating the surface of TiO2 nanofibers with Ag2O nanoparticles (NPs) through a wet-chemical precipitation reaction under a certain amount of AgNO3 and NaOH. The photocatalytic properties of the as-prepared samples were tested by photocatalytic decomposition of RhB aqueous solution under visible light irradiation. Comparing with bare TiO2 nanofibers and pure Ag2O, the Ag2O/TiO2 composite with optimal mass ratio of Ag2O to TiO2 (40 wt %) exhibited the highest photocatalytic activity in decomposition of RhB. The enhanced photocatalytic activity of the composite was attributed to the fast separation of the photo-generated electron-hole pairs in the Ag2O/TiO2 interface in which a p-n heterojunction is formed and the high visible light absorption efficiency of Ag2O/TiO2 nanofibers.
机译：以钛酸四丁酯，冰醋酸，PVP和甲醇为前驱体，通过电纺法成功制备了TiO2纳米纤维。然后通过在一定量的AgNO 3和NaOH下通过湿化学沉淀反应用Ag 2 O纳米颗粒（NP）修饰TiO 2纳米纤维的表面来制备Ag 2 O / TiO 2复合纳米纤维。通过在可见光照射下对RhB水溶液进行光催化分解来测试所制备样品的光催化性能。与裸露的TiO2纳米纤维和纯Ag2O相比，具有最佳质量比的Ag2O / TiO2（40 wt％）的Ag2O / TiO2复合材料在RhB的分解中表现出最高的光催化活性。复合材料增强的光催化活性归因于在形成p-n异质结的Ag2O / TiO2界面中光生电子-空穴对的快速分离，以及Ag2O / TiO2纳米纤维的高可见光吸收效率。

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  • 来源
    《Applied Surface Science》 |2019年第28期|902-910|共9页
  • 作者

    Liu Guo; Wang Guohong; Hu Zhihui; Su Yaorong; Zhao Li;

  • 作者单位

    Hubei Normal Univ, Hubei Key Lab Pollutant Anal & Reuse Technol, Huangshi 435002, Peoples R China;

    Hubei Normal Univ, Hubei Key Lab Pollutant Anal & Reuse Technol, Huangshi 435002, Peoples R China;

    Hubei Normal Univ, Coll Chem & Chem Engn, Huangshi 435002, Peoples R China;

    Shenzhen Technol Univ, Coll New Mat & New Energy, Shenzhen 518118, Peoples R China;

    Hubei Univ, Key Lab Green Preparat & Applicat Funct Mat, Minist Of Educ, Wuhan 430062, Hubei, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Ag2O; TiO2 nanofiber; p-n heterojunction; Photocatalytic activity; Visible light;

    机译：Ag2O;TiO2纳米纤维;p-n异质结;光催化活性;可见光;

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