Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (6): 886-894.DOI: 10.1016/S1872-2067(19)63330-9

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Surface plasmon resonance effect of Ag nanoparticles for improving the photocatalytic performance of biochar quantum-dot/Bi4Ti3O12 nanosheets

Tao Wanga,c, Xiqing Liua,b, Qiuyue Mena,c, Changchang Maa,c, Yang Liuc,d, Wei Mac,e, Zhi Liuc,f, Maobin Weic,d, Chunxiang Lia,c, Yongsheng Yana,c   

  1. a School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China;
    b School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China;
    c Institute of Green Chemistry and Chemical Technology, Jiangsu University, Zhenjiang 212013, Jiangsu, China;
    d College of Physics, Jilin Normal University, Siping 13600, Jilin, China;
    e Jiangsu United Chemical Co., Ltd., Zhenjiang 212212, Jiangsu, China;
    f School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, Liaoning, China  
  • Received:2018-12-06 Revised:2019-02-08 Online:2019-06-18 Published:2019-04-26
  • Contact: S1872-2067(19)63330-9
  • Supported by:

    This work was financially supported by the National Natural Science Foundation of China (U1510126, 21676115), and the Natural Science Foundation of Jiangsu Provincial (BK20180884).

Abstract:

Herein, we report a novel ternary material comprised of Ag nanoparticles and carbon quantum dots (CDs), which are co-loaded using 2D Bi4Ti3O12 (BIT) sheets. In this system, Ag can be applied as excited electron-hole pairs in the Bi4Ti3O12 by transferring the plasmonic energy from the metal to the semiconductor. The surface plasmon resonance of Ag can promote the electron transfer properties of the CDs, thereby improving the separation efficiency of the electron-hole pairs. Meanwhile, the CDs can act as an electron buffer to decrease the recombination rate of the electron hole. Moreover, CDs are prepared using a biomaterial, which can provide a chemical group to enhance the electron transfer and connection. The synergistic effects of CDs, Ag, and BIT enable the design of a photocatalytic application with a remarkably improved efficiency and operational stability.

Key words: 2D material, Plasmo resonance, Synergistic effect, Carbon quantum dot, Electron buffer