Synthesis of novel TiO2/CeFeO3 heterojunction using Mugwort (Artemisia vulgaris) leaves extracts with enhanced photocatalytic activity under visible light irradiation

Bambang Wijaya, Dewangga Oky Bagus Apriandanu, Rizki Marcony Surya, Yoki Yulizar, Nonni Soraya Sambudi, Munawar Khalil, Aminah Umar

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1 Citation (Scopus)

Abstract

TiO2 is a low-cost and biocompatible material with high oxidizing ability. However, their photocatalytic activity is limited to UV light irradiation. In this research, for the first time, a novel TiO2/CeFeO3 heterojunction was synthesized by the green synthesis method using an aqueous fraction of Artemisia vulgaris leaf extracts. TiO2/CeFeO3 shows enhanced photocatalytic performance under visible light irradiation. The vibrational, structural, optical, and compositional properties of TiO2/CeFeO3 were characterized. The as-prepared TiO2/CeFeO3 has spherical-shaped particles and shows a significantly diminished bandgap energy (3.25 eV to 2.75 eV). The photocatalytic performance of TiO2/CeFeO3 was investigated to degrade malachite green (MG) with an efficiency of up to 93.53% under its optimum dose. TiO2/CeFeO3 shows stable photocatalytic performance until the fourth cycle. The kinetics of the photodegradation of MG followed the pseudo-first-order reaction with a rate constant (ka pp) of 2.14×10−2 min−1. The enhanced photocatalytic activity of TiO2/CeFeO3 was attributable to the creation of heterojunction, which suppresses the recombination rate of photogenerated electron-hole validated by the photoluminescence analysis. This work presents an eco-friendly approach to synthesizing novel heterojunction material with enhanced photocatalytic dye degradation.

Original languageEnglish
Article number100599
JournalApplied Surface Science Advances
Volume21
DOIs
Publication statusPublished - Jun 2024

Keywords

  • Artemisia vulgaris
  • Green synthesis
  • Malachite green
  • Photocatalyst
  • TiO
  • TiO/CeFeO heterojunction

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