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<p>In this paper, a solid-state thermal decomposition method was used to synthesis calcium titanate (CaTiO<sub>3</sub>)/titania (TiO<sub>2</sub>) nanocomposite. Commercial TiO<sub>2</sub> and calcium oxalate (CaC<sub>2</sub>O<sub>4</sub>) were used as metal precursors. The sample was characterized by various spectroscopic and microscopic techniques. The formation of CaTiO<sub>3</sub>/TiO<sub>2</sub> nanocomposite was ascertained by XRD, FTIR, XPS, FESEM and HRTEM analysis. Light harvesting capacity, band gap and luminescence features of CaTiO<sub>3</sub>/TiO<sub>2</sub> nanocomposite were determined by UV-Visible and photoluminescence (PL) spectroscopies. The thermal stability of CaTiO<sub>3</sub>/TiO<sub>2</sub> nanocomposite was examined by thermogravimetric-differential thermal analysis (TG-DTA). Photocatalytic activity of CaTiO<sub>3</sub>/TiO<sub>2</sub> nanocomposite was assessed by using ultraviolet (UV)-induced methylene blue degradation along with hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) as an oxidant. The nanocomposite showed 96.5% efficiency within 120&#xa0;min under UV/H<sub>2</sub>O<sub>2</sub>, whereas 26.3% efficiency was obtained under only ultraviolet light (without H<sub>2</sub>O<sub>2</sub>). The possible reactive species involved in the CaTiO<sub>3</sub>/TiO<sub>2</sub>-catalysed reaction was determined. The recyclability of the photocatalyst has also been tested. CaTiO<sub>3</sub>/TiO<sub>2</sub> nanocomposite might have great application in water purification.</p>

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CaTiO3/TiO2 Nanocomposite: Easy Synthesis, Structure, Optical and Photocatalytic Activity

  • 期刊论文

  • 发表日期：

    2025年11月21日

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  • V. Gopika,
  • P. Nivetha,
  • R. Suresh,
  • N. Jayaprakash,
  • Thangamani Arumugam,
  • Pandian Bothi Raja

摘要

In this paper, a solid-state thermal decomposition method was used to synthesis calcium titanate (CaTiO3)/titania (TiO2) nanocomposite. Commercial TiO2 and calcium oxalate (CaC2O4) were used as metal precursors. The sample was characterized by various spectroscopic and microscopic techniques. The formation of CaTiO3/TiO2 nanocomposite was ascertained by XRD, FTIR, XPS, FESEM and HRTEM analysis. Light harvesting capacity, band gap and luminescence features of CaTiO3/TiO2 nanocomposite were determined by UV-Visible and photoluminescence (PL) spectroscopies. The thermal stability of CaTiO3/TiO2 nanocomposite was examined by thermogravimetric-differential thermal analysis (TG-DTA). Photocatalytic activity of CaTiO3/TiO2 nanocomposite was assessed by using ultraviolet (UV)-induced methylene blue degradation along with hydrogen peroxide (H2O2) as an oxidant. The nanocomposite showed 96.5% efficiency within 120 min under UV/H2O2, whereas 26.3% efficiency was obtained under only ultraviolet light (without H2O2). The possible reactive species involved in the CaTiO3/TiO2-catalysed reaction was determined. The recyclability of the photocatalyst has also been tested. CaTiO3/TiO2 nanocomposite might have great application in water purification.