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      https://www.ias.ac.in/article/fulltext/boms/044/0028

    • Keywords

       

      BaTiO$_3$; hydrothermal synthesis; photocatalytic activity; methylene blue.

    • Abstract

       

      g-C$_3$N$_4$/BaTiO$_3$ composite was hydrothermally synthesized at 200$^{\circ}$C for 24 h from a dispersed mixture of g-C$_3$N$_4$ and BaTiO$_3$ in water, in which BaTiO$_3$ was hydrothermally synthesized at 200$^{\circ}$C for 48 h using barium nitrate, isopropanol, titanium tetrachloride and sodium hydroxide as precursors without assistance of any surfactant; and graphitic carbon nitride (g-C$_3$N$_4$) was prepared by pyrolysis of melamine at 520$^{\circ}$C. The obtained materials were characterized by X-ray diffraction, infrared spectra, scanning electron microscopy, elemental mapping, X-ray photoelectron spectroscopy and ultraviolet–visible diffuse reflectance spectroscopy. The photocatalytic activity of the materials was assessed bydegradation of methylene blue (MB) under visible light. The enhancement of photocatalytic activity of the g-C$_3$N$_4$/BaTiO$_3$ composite compared to the single components, g-C$_3$N$_4$ and BaTiO$_3$ was observed, which is attributed to the reduction of combination rate of photogenerated electron–hole pairs in the composite. The MB degradation over the composite was mainly attributed to the photoreduction process induced by the superoxide radical anions (${}^{\bullet}$O$_2^-$) and hydroxyl radicals (${}^{\bullet}$OH); and a mechanism was also proposed based on the heterojunction model from the two semiconductor components.

    • Author Affiliations

       

      VAN KIM NGUYEN1 VIET NGA NGUYEN THI2 HUU HA TRAN1 THU PHUONG TRAN THI1 THANH TAM TRUONG1 VIEN VO1

      1. Department of Chemistry, Quy Nhon University, Quy Nhon City 820000, Vietnam
      2. Department of Education, Quy Nhon University, Quy Nhon City 820000, Vietnam
    • Dates

       
  • Bulletin of Materials Science | News

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