Mie resonance in hollow nanoshells of ternary TiO2-Au-CdS and enhanced photocatalytic hydrogen evolution

Xiaxi Yao, Xiuli Hu, Wenjun Zhang, Xinyu Gong, Xuhong Wang, Suresh C. Pillai, Dionysios D. Dionysiou, Dawei Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

We design a ternary TiO2-Au-CdS photocatalyst with controllable Mie scattering peak for the first time to verify if matching the Mie scattering peak with the absorption peak of semiconductors could greatly improve their photocatalytic performances. By varying the inner diameter of TiO2 nanoshell from 150 to 255 nm, the Mie scattering peak was controlled from below 370–510 nm. When the Mie scattering peak of TiO2 nanoshell (inner diameter = 185 nm) matches the absorption band of CdS, a highest visible-light photocatalytic hydrogen production rate (669.7 μmol h−1 g−1) was observed among all the ternary photocatalysts with different inner diameters. The backscattering calculation based on Mie's theory and the comparison of photocatalytic performances of different composite catalysts including TiO2, TiO2-Au, and TiO2-CdS hollow nanoshells also confirmed that the scattering phenomenon in hollow nanoshells is beneficial for photocatalysis. This work may favor various technological applications of Mie scattering for effective light utilization.

Original languageEnglish
Article number119153
JournalApplied Catalysis B: Environmental
Volume276
DOIs
Publication statusPublished - Nov 5 2020

Keywords

  • Hollow nanoshells
  • Hydrogen production
  • Mie resonance
  • Photocatalysis
  • TiO-Au-CdS

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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