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首页> 外文期刊>RSC Advances >The structure and self-regeneration performance of Salix psammophila-activated carbon modified by Ag and N co-doped TiO2
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The structure and self-regeneration performance of Salix psammophila-activated carbon modified by Ag and N co-doped TiO2

机译：AG和N掺杂TiO2改性Salix Psammophila活性炭的结构和自再生性能

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摘要

In this study, Salix psammophila activated carbon (AC) was modified by immersing it in an AgNO3 solution and coating it with an N-doped TiO2 film to improve its self-regeneration performance in visible light. Ag+ was adsorbed and reduced to Ag nanoparticles by AC. Ti element only existed as Ti4+, and N element was incorporated into TiO2 mainly in the form of interstitial nitrogen. The photodegradation of Ag-N-TiO2-AC (AC coated with Ag and N co-modified TiO2) was enhanced under visible light irradiation because of its three inherent structures: (1) Ag and N co-modified TiO2 had a smaller average crystal size; (2) with a low bandgap (1.59 eV), the photoresponse region of Ag and N co-modified TiO2 was greatly extended; (3) the lifetime of the photogenerated holes was increased. With the increase in the AgNO3 dosage, the Ag-N-TiO2-AC photodegradation increased, while its adsorption decreased. Because of these synergistic effects, 0.05Ag-0.1N-TiO2-AC (where 0.05 is the dosage of AgNO3, g) presented the best self-regeneration performance under visible light irradiation.
机译：在该研究中，通过将其浸入AgNO 3溶液中并用N掺杂的TiO 2膜涂覆以改善其可见光的自再生性能来改变Salix Psammophila活性炭（AC）。通过AC吸附并将Ag +吸附并将其还原成Ag纳米颗粒。 Ti元素仅存为Ti4 +，并且N个元素主要以间质氮的形式掺入TiO 2中。在可见光照射下，Ag-N-TiO2-AC（Ac涂覆有Ag和N共改性TiO 2的Ac和N共改性TiO2），因为其三种固有的结构：（1）Ag和N共改性TiO 2具有较小的平均晶体尺寸; （2）具有低带隙（1.59eV），AG和N共改性TiO2的光响应区域大大延伸; （3）上升光孔的寿命增加。随着AgNO3剂量的增加，Ag-N-TiO 2-AC光降解增加，而其吸附降低。由于这些协同效应，0.05Ag-0.1N-TiO2-AC（其中0.05是AgNO3，G的剂量）呈现了可见光照射下的最佳自再生性能。

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  • 来源
    《RSC Advances》 |2020年第7期|共9页
  • 作者

    Liu Wenjing; Lang Zhen;

  • 作者单位

    Inner Mongolia Agr Univ Coll Mat Sci &

    Art Design Hohhot 010018 Peoples R China;

    Inner Mongolia Agr Univ Coll Mat Sci &

    Art Design Hohhot 010018 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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