Hydrothermal synthesis, characterization and photocatalytic activity of Mg doped MoS2

Author:

Khan Muhammad Iftikhar1,Touheed Muhammad1,Sajjad-ul-Hasan Muhammad1,Siddique Muhammad1,Rouf Syed Awais2,Ahmad Tanveer3,Fatima Mahvish4,Iqbal Munawar5,Almoneef Maha M.6,Alwadai Norah6

Affiliation:

1. Department of Physics , The University of Lahore , Lahore , 53700 , Pakistan

2. Department of Physics, Division of Science and Technology , Univeristy of Education , Lahore , Pakistan

3. Department of Physics , University of Peshawar , Peshawar , Pakistan

4. Department of physics, Deanship of Educational Services , Qassim University , Buraydah , Saudi Arabia

5. Department of Chemistry , The University of Lahore , Lahore , 53700 , Pakistan

6. Department of Physics, College of Sciences, Princess Nourah bint Abdulrahman University (PNU) , Riyadh 11671 , Saudi Arabia

Abstract

Abstract In this research work nanoparticles of Mg (0, 1, 2 and 3%) doped MoS2 are prepared by Hydrothermal method at 200 °C for 9 h. Scanning Electron Microscope (SEM) for surface morphology, Fourier Transform Infrared Spectroscopy (FTIR) for structural and chemical bonding and UV-visible spectroscopy for optical properties are used. SEM showed that sheet-like structure has changed into stone-like shaped when Mg has doped into MoS2. From FTIR, Mo–O, Mo=S, and H–O bond peaks are becoming dim and new chemical bonds S=O, Mo=O, Mg–O, CH and OH are forming with the increase of Mg doping. UV-visible spectroscopy showed that MoS2 has an indirect bandgap 2.21 eV. Band gap decreased from 1.84 to 1.82 eV when the Mg doping was increased from 1 to 2%, respectively. As Mg concentration was increased i.e. 3% then band gap increased to 1.88 eV. Photocatalytic activity (PCA) of undoped and Mg doped MoS2 is appraised by degrading rhodamine blue (RhB) and methylene blue (MB) dyes. The results showed that PCA (in presence of visible light) Mg doped MoS2 is greater than pure MoS2 which significantly increased the photocatalytic properties.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry

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