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首页> 外文期刊>New Journal of Chemistry >Electrochemically active biofilm-assisted biogenic synthesis of an Ag-decorated ZnO@C core-shell ternary plasmonic photocatalyst with enhanced visible-photocatalytic activity
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Electrochemically active biofilm-assisted biogenic synthesis of an Ag-decorated ZnO@C core-shell ternary plasmonic photocatalyst with enhanced visible-photocatalytic activity

机译：电化学活性生物膜辅助生物合成Ag装饰的ZnO @ C芯壳三元等离子体光催化剂，具有增强的可见光催化活性

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摘要

Colonies of electrochemically active microorganisms called electroactive biofilms (EABs) have potential applications in bioenergy and chemical production. In the present study, an EAB was used as a reducing tool to synthesize Ag-decorated ZnO@C core-shell (Ag-ZnO@C) ternary plasmonic photocatalysts. A simple thermal decomposition route was followed to synthesize ZnO@C nanoparticles using a zinc aniline nitrate complex. The simultaneous adsorption of Ag+ in the carbon shell of the ZnO@C particles during reduction using an EAB allowed the direct contact among Ag nanoparticles, the ZnO core, and the carbon shell. Therefore, the synthesized Ag-ZnO@C ternary photocatalysts showed a stronger interconnection among all the components, which allowed the easy transfer of photogenerated charges and provided enhanced charge carrier separation. Optical characterization showed that the enhanced absorption of visible light along with a decrease in the band gap and a red shift in the valence band maximum occurred due to the decoration of Ag-nanoparticles on ZnO@C. Ag-ZnO@C exhibited higher photocatalytic activity for the degradation of rhodamine blue and 4-nitrophenol under visible light irradiation than ZnO@C and bare ZnO without any significant loss after five successive cycles. Finally, a possible photocatalytic mechanism for charge transfer was proposed to explain the enhanced photocatalytic performance of the Ag-ZnO@C ternary photocatalyst. This study provides insights into the ternary photocatalytic system with a core-shell material and offers a biogenic route for the facile fabrication of Ag-ZnO@C photocatalysts.
机译：电化学活性微生物的殖民地称为电活性生物膜（EAB）在生物能源和化学生产中具有潜在的应用。在本研究中，EAB被用作减少工具，以合成Ag装饰的ZnO @ C核心壳（Ag-ZnO @ C）三元等离子体光催化剂。遵循简单的热分解途径，使用锌苯胺硝酸锌络合物合成ZnO @ C纳米颗粒。使用EAB在还原过程中同时吸附ZnO @ C颗粒的碳壳中的碳壳允许直接接触Ag纳米粒子，ZnO核和碳壳。因此，合成的Ag-ZnO @ C三元光催化剂在所有部件中显示出更强的互连，其允许易于转移光生电荷并提供增强的电荷载体分离。光学表征显示，由于ZnO @ C上的Ag-nanoplicles的装饰，可以增强可见光的吸收和在价带最大值中的红色偏移。 Ag-ZnO @ C表现出较高的光催化活性，用于在可见光照射下比ZnO @ C和裸ZnO在可见光照射下的罗丹明蓝和4-硝基苯酚的降解而没有任何显着的循环。最后，提出了一种可能的光催化机制来解释Ag-ZnO @ C三元光催化剂的增强的光催化性能。本研究提供了具有核壳材料的三元光催化系统的见解，并提供了用于Ag-ZnO @ C光催化剂的面部制造的生物途径。

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  • 来源
    《New Journal of Chemistry》 |2018年第3期|共11页
  • 作者

    Sawant Sandesh Y.; Kim Jae Yeol; Thi Hiep Han; Ansari Sajid Ali; Cho Moo Hwan;

  • 作者单位

    Yeungnam Univ Sch Chem Engn Gyongsan 712749 Gyeongbuk South Korea;

    Yeungnam Univ Sch Chem Engn Gyongsan 712749 Gyeongbuk South Korea;

    Yeungnam Univ Sch Chem Engn Gyongsan 712749 Gyeongbuk South Korea;

    Yeungnam Univ Sch Chem Engn Gyongsan 712749 Gyeongbuk South Korea;

    Yeungnam Univ Sch Chem Engn Gyongsan 712749 Gyeongbuk South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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