The effect of titanium dioxide-supported CdSe photocatalysts enhanced for photocatalytic glucose electrooxidation under UV illumination


Caglar A., DEMİR KIVRAK H., Aktaş N.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, vol.47, no.49, pp.21130-21145, 2022 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 47 Issue: 49
  • Publication Date: 2022
  • Doi Number: 10.1016/j.ijhydene.2022.04.231
  • Title of Journal : INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • Page Numbers: pp.21130-21145
  • Keywords: Cadmium, Selenium, Titanium dioxide, UV illumination, Photocatalytic glucose, electrooxidation, ACTIVATED CARBON ANODE, FUEL-CELL, ELECTROCATALYTIC OXIDATION, CRYSTALLITE SIZE, TIO2 NANORODS, HYDROGEN, PERFORMANCE, CATALYSTS, CO, WATER

Abstract

The wetness impregnation method was used to synthesize 0.1% CdSe/TiO(2 )photocatalysts with different atomic molar ratios (90-10, 70-30, 50-50, and 30-70). These catalysts were characterized by XRD, SEM-EDX and mapping, TEM-EDS, UV-VIS spectroscopy, fluorescence spectroscopy, XPS, TPR, TPO, and TPD analyses. Cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS) analyses were performed to examine the photocatalytic activity for photocatalytic fuel cells (PFCs) in glucose solution in the dark and under UV illumination. The characterization analyses revealed that anatase TiO2 formed the catalyst and electronic structure and surface properties changed when doped with metal. The photocatalytic glucose electrooxidation (PGE) results demonstrate that the 0.1% CdSe(50-50)/TiO(2 )catalyst has higher photocatalytic activity, stability, and resistance than other catalysts both in the dark (2.71 mA cm(-2)) and under UV illumination (7.20 mA cm(-2)). These results offer a promising new type of photocatalyst for PFC applications. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.