The improved photocatalytic activity of highly expanded MoS2under visible light emitting diodes

Magdeline Tze Leng Lai, Kian Mun Lee, Thomas Chung Kuang Yang, Guan Ting Pan, Chin Wei Lai, Chia Yun Chen, Mohd Rafie Johan, Joon Ching Juan

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

Photocatalytic degradation is a promising method to remove organic pollutants from water. Photocatalysts based on two-dimensional (2D) transition metal dichalcogenides (TMDs) such as MoS2nanomaterials have gained tremendous popularity. This is due to their narrow band gap and high visible light absorption. Herein, a MoS2photocatalyst with highly expanded interlayer spaces of 1.51 nm was synthesized in the presence of Pluronic F-127 as a template by a facile one-pot hydrothermal method. This expanded MoS2(MF-1) managed to photodegrade 98% (2.62 × 10−2min−1) of methylene blue (MB) dye under irradiation of 1 W visible light-emitting diode (LED) white light. The dominant performance of MF-1 is attributed to the highly expanded interlayer spacing, which exposed more active edge sites. Moreover, the formation of surface defects such as surface cracks and sulfur vacancies (Sv) facilitates the adsorption capacity andin situgeneration of reactive oxygen species (ROS). The dominant ROS responsible for the photodegradation of MB is superoxide radical (˙O2). The photocatalyst shows good recyclability without deterioration even after five consecutive cycles.

Original languageEnglish
Pages (from-to)1106-1120
Number of pages15
JournalNanoscale Advances
Volume3
Issue number4
DOIs
Publication statusPublished - 2021 Feb 21

All Science Journal Classification (ASJC) codes

  • General Engineering
  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • General Chemistry
  • General Materials Science

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