The enhanced TiO2-supported CdTe photocatalysts for photocatalytic hydrogen peroxide electrooxidation

Caglar A., Gözde Sayin A., Aktaş N., DEMİR KIVRAK H.

Journal of Photochemistry and Photobiology A: Chemistry, vol.445, 2023 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 445
  • Publication Date: 2023
  • Doi Number: 10.1016/j.jphotochem.2023.115070
  • Journal Name: Journal of Photochemistry and Photobiology A: Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, Chemical Abstracts Core, Chimica, INSPEC
  • Keywords: Electrooxidation, Hydrogen peroxide, Photocatalyst, Photocatalytic fuel cell
  • Van Yüzüncü Yıl University Affiliated: Yes

Abstract

At present, titanium dioxide (TiO2)-supported CdTe photocatalysts were prepared by wet impregnation method for photocatalytic hydrogen peroxide (H2O2) electrooxidation. The structural and morphology surface analyses of these photocatalysts were characterized by X-Ray diffraction (XRD), scanning electron microscopy-energy dispersive X-Ray (SEM-EDX) and mapping analysis, high-resolution transmission electron microscopy (HR-TEM), ultraviolet–visible (UV–VIS) spectroscopy, X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma mass spectrometry (ICP-MS). In addition, the photocatalytic activity of the photocatalysts was examined by cyclic voltammetry (CV). The CdTe(70–30)/TiO2 photocatalyst exhibited the best photocatalytic activity under UV illumination with a specific activity of 17.28 mA/cm2 both in the dark (7.86 mA/cm2) and compared to other photocatalysts. Furthermore, it was observed that it exhibited the best stability and resistance by chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS) analyses. It could be a promising photoanode catalyst for photocatalytic fuel cells.