Coupled porosity and heterojunction engineering: MOF-derived porous Co3O4 embedded on TiO2 nanotube arrays for water remediation

Jianing Dong, Xinnan Zhang, Xiuli Dong, Kim Hoong Ng, Zailai Xie, I. Wen Peter Chen, Yun Hau Ng, Jianying Huang, Yuekun Lai

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Strive to develop the interaction and efficient co-catalysts is one of the vital projects in realizing hybrid photocatalytic systems for water remediation. In this work, p-type porous Co3O4 was embedded onto n-type vertical TiO2 nanotube via an in-situ thermal etching method. ZIF-67 was employed as the structural template for Co3O4, which then augmented the light harvesting ability of the resultant photocatalyst. Such improvement was prompted by the light reflecting and directing attributes of porous Co3O4. Therefore, a remarkable MB removal rate was attained under sunlight irradiation, with superoxide radical being identified as the major reactive species. Photoelectric properties evaluation also verified that the p-n heterojunction developed herein exhibits outstanding charges separation ability with low impedance, particularly under light irradiation. This work highlights the idea on coupling both porous and p-n heterojunction engineering in augmenting photoactivity of catalyst, while offering insights in such structure-mediating approach.

Original languageEnglish
Article number129799
JournalChemosphere
Volume274
DOIs
Publication statusPublished - 2021 Jul

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • General Chemistry
  • Environmental Chemistry
  • Pollution
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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