Photocatalytic Degradation of Rhodamine B on MOS2 Microspheres Prepared by Sodium Dialkyldithiophosphate-Assisted Hydrothermal Synthesis
- Authors: Ri Y.1, Kim J.1, Kim K.1
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Affiliations:
- Institute of Nano Technology, High Tech Research Center, KimIlSung University
- Issue: Vol 64, No 3 (2023)
- Pages: 274-275
- Section: Articles
- URL: https://journals.rcsi.science/0453-8811/article/view/136989
- DOI: https://doi.org/10.31857/S0453881123030097
- ID: 136989
Cite item
Abstract
Abstract—
MoS2 microspheres were synthesized via a facile hydrothermal method using (NH4)2MoO4, H2C2O4·2H2O, and sodium dialkyldithiophosphate (NaDDP) as reactants. Herein, NaDDP plays a role of surfactant for the formation of the MoS2 microspheres, unlike other different sulfur sources. The morphology and crystal structure of the MoS2 microspheres were characterized using scanning electron microscope (SEM) and X-ray diffraction (XRD). The prepared MoS2 microspheres were used as a catalyst for photocatalytic degradation of rhodamine B. The effect of the size of the MoS2 microspheres on photocatalytic activity was investigated. For comparison, NaDDP was replaced by thiourea, thioacetamide and L-cysteine. The results indicate that the MoS2 microspheres are spherical, and the diameter of the MoS2 microsphere decreases with increasing concentration of oxalic acid in the reactants. The MoS2 microspheres have hexagonal 2H-MoS2 structure and preferentially grow along the (002) plane. In addition, it is found that when the concentration of oxalic acid is 0.075 mol/L, the best photocatalytic efficiency is 91.3% within irradiation time of 120 min and the reaction rate constant is 0.163 min–1. The photocatalytic activity of MoS2 synthesized from four sulfur sources can be arranged in the following order: NaDDP > thioacetamide > L-cysteine > thiourea.
Keywords
About the authors
Yu-Il Ri
Institute of Nano Technology, High Tech Research Center, KimIlSung University
Author for correspondence.
Email: yi.ri0101@ryongnamsan.edu.kp
DPRK, Pyongyang
Jong-Min Kim
Institute of Nano Technology, High Tech Research Center, KimIlSung University
Email: yi.ri0101@ryongnamsan.edu.kp
DPRK, Pyongyang
Kyong-Il Kim
Institute of Nano Technology, High Tech Research Center, KimIlSung University
Email: yi.ri0101@ryongnamsan.edu.kp
DPRK, Pyongyang