Effect of CdS loading on the properties and photocatalytic activity of MoS2 nanosheets
Ashmalina Rahman, Fazlurrahman Khan, James R. Jennings, Ai Ling Tan, Young‐Mog Kim, Mohammad Mansoob Khan
Abstract
Abstract Molybdenum sulfide (MoS 2 ) and modified MoS 2 with different percentages of CdS (10%, 30%, and 50% CdS@MoS 2 ) were successfully synthesized and characterized. The photocatalytic performance of the MoS 2 and CdS@MoS 2 was evaluated by degrading brilliant green (BG), methylene blue (MB), and rhodamine B (RhB) dyes under visible light irradiation. Amongst the synthesized photocatalysts, 50% CdS@MoS 2 exhibited the highest photocatalytic activity, degrading 97.6%, 90.3%, and 75.5% of BG, MB, and RhB dyes, respectively within 5 h. The active species involved in the degradation processes were investigated. All trapping agents inhibited BG and MB degradation to a similar extent, indicating that all of the probed active species play an important role in the degradation of BG and MB. In contrast, h + and O 2 •− were found to be the main reactive species in the photocatalytic RhB degradation. A potential mechanism for the photocatalytic degradation of dyes using CdS@MoS 2 has been proposed. This work highlights the potential of CdS@MoS 2 as a photocatalyst for more efficient water remediation applications.