Effective Removal of Methylene Blue by Mn 3 O 4 /NiO Nanocomposite under Visible Light

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Komal Majeed¹  Jaweria Ambreen¹  Saeed Ahmed Khan²  Saz Muhammad³  Aqeel Ahmed Shah⁴  Muhammad Ali Bhatti⁵  Syeda Sitwat Batool⁶  Muhammad Farooq⁷  Syed Nizam Uddin Shah Bukhari⁸  Ali Dad Chandio⁴  Sadaf Jamal Gilani⁹  May Nasser Bin Jumah^1,10 

[1] Department of Chemistry, COMSATS University Islamabad;Department of Electrical Engineering, Sukkur IBA University;Department of Chemistry, Lahore Garrison University;Wet Chemistry Laboratory, Department of Metallurgical Engineering, NED University of Engineering and Technology, University Road;Institute of Environmental Sciences, University of Sindh Jamshoro;Department of Physics, COMSATS University Islamabad;Pakistan Council of Scientific and Industrial Research ,(PCSIR), PCSIR Head Office;Department of Basic Science and Humanities, Dawood University of Engineering and Technology;Department of Basic Health Sciences, Foundation Year, Princess Nourah bint Abdulrahman University;Biology Department, College of Science, Princess Nourah bint Abdulrahman University;Environment and Biomaterial Unit, Health Sciences Research Center, Princess Nourah bint Abdulrahman University;Saudi Society for Applied Science, Princess Nourah bint Abdulrahman University

关键词: manganese oxide;    nickel oxide;    methylene blue;    nanocomposites;    photocatalysis;    adsorption;   

DOI  :  10.3390/separations10030200

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

Wastewater treatment is indispensable as wastewater can lead to adverse health effects and deteriorate the quality of life on earth. Photocatalysis is a facile methodology to address this issue. In this study, nanocomposites (NCs) of manganese oxide (Mn3O4) and nickel oxide (NiO) were synthesized in different weight ratios via the solid-state reaction route. Structural properties, optical properties, surface morphology, and functional group analysis of the synthesized nanomaterials were conducted using X-ray diffraction (XRD), UV– Vis spectroscopy, scanning electron microscopy (SEM) along with energy-dispersive X-ray (EDX) analysis, and Fourier-transform infrared (FTIR) spectroscopy, respectively. The bandgap of the nanocomposite decreases significantly from 2.35 eV for the Mn3O4 NPs to 1.65 eV for the Mn3O4/NiO nanocomposite (NC). Moreover, adsorption studies followed by the photocatalytic performance of the Mn3O4/NiO NCs were evaluated to determine the removal of methylene blue (MB) dye from wastewater. The photocatalytic performance of the nanocomposite enhances as the ratio of Mn3O4 in the composite increases from one weight percentage to three weight percentage. The photocatalytic degradation efficiency was calculated to be 95%. The results show that the synthesized NCs could play an important role in photocatalytic wastewater purification and environmental remediation.

【 授权许可】

CC BY