Enhancing photocatalytic degradation of methylene blue by TiO2-CeO2 heterostructure under visible light irradiation

  • Vu Thi Nga Department of Chemistry, College of Education, Vinh University
  • Le The Tam School of Chemistry, Biology and Environment, Vinh University
  • Nguyen Hoa Du Department of Chemistry, College of Education, Vinh University
  • Nguyen Hoang Hao Department of Chemistry, College of Education, Vinh University
  • Le Thi Thu Hiep Centre for Practice and Experiment, Vinh University
  • Chu Thi Thanh Lam Centre for Practice and Experiment, Vinh University
  • Nguyen Thi Kim Chung Centre for Practice and Experiment, Vinh University
  • Nguyen Le Khanh Huyen Phan Boi Chau High School for Gifted, Vinh City, Nghe An
  • Ho Thi Van Suong School of Chemistry, Biology and Environment, Vinh University
  • Nguyen Thi Quynh Department of Chemistry, College of Education, Vinh University
  • Ho Dinh Quang Department of Chemistry, College of Education, Vinh University
Keywords: TiO2 nanoparticles; TiO2-CeO2 heterostructure; Methylene blue and photocatalytic degradation.

Abstract

TiO2-CeO2 heterostructure was synthesized by a simple hydrothermal technique, with an average particle size of 21 nm, and high uniformity from the common precursors. For the characterization of the catalyst properties, the techniques of X-ray Diffraction (XRD), Fourier-Transform Infrared Spectroscopy (FTIR), and Transmission Electron Microscopes (TEM) were used. The TiO2-CeO2 heterostructure exhibited higher photocatalytic activity than TiO2 in the removal of methylene blue (MB) dye under visible light irradiation. The combination of TiO2-CeO2 facilitated electron pathways, creating favorable conditions for efficient separation of electron-hole pairs and enhancing the photocatalytic activity of the material. The TiO2-CeO2 heterostructure demonstrated rapid and highly efficient photodegradation of methylene blue, achieving an 89.79% removal rate after 120 minutes of irradiation. This performance, coupled with enhanced visible light utilization, suggests wide applications in the field of photocatalysis.

điểm /   đánh giá
Published
2024-02-25
Issue
Vol. 93 (2024)
Section
Chemistry, Biology & Environment