Effect of Ag doped MnO2 nanostructures suitable for wastewater treatment and other environmental pollutant applications

S Panimalar; S Logambal; R Thambidurai; C Inmozhi; R Uthrakumar; Azhaguchamy Muthukumaran; Rabab Ahmed Rasheed; Mansour K Gatasheh; A Raja; J Kennedy; K Kaviyarasu

doi:10.1016/j.envres.2021.112560

Effect of Ag doped MnO₂ nanostructures suitable for wastewater treatment and other environmental pollutant applications

Environ Res. 2022 Apr 1:205:112560. doi: 10.1016/j.envres.2021.112560. Epub 2021 Dec 13.

Authors

Affiliations

¹ Department of Physics, Periyar University, Salem, 636011, Tamil Nadu, India.
² Department of Physics, Government Arts College (Autonomous), Salem, 636007, Tamil Nadu, India.
³ Department of Physics, Government Arts College for Women, Salem, 636008, Tamil Nadu, India. Electronic address: cvesta19@yahoo.com.
⁴ Department of Biotechnology, Kalasalingam Academy of Research and Education, Krishnankoil, Tamilnadu, India.
⁵ Histology & Cell Biology Department, Faculty of Medicine, King Salman International University, South Sinai, Egypt.
⁶ Department of Biochemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
⁷ Department of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
⁸ National Isotope Centre, GNS Science, PO Box 31312, Lower Hutt, 5010, New Zealand.
⁹ UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology Laboratories, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, PO Box 392, Pretoria, South Africa; Nanosciences African Network (NANOAFNET), Materials Research Group (MRG), iThemba LABS-National Research Foundation (NRF), 1 Old Faure Road, 7129, PO Box 722, Somerset West, Western Cape Province, South Africa. Electronic address: kavi@tlabs.ac.za.

PMID: 34915030
DOI: 10.1016/j.envres.2021.112560

Abstract

A modest sol-gel method has been employed to prepare the pure and Ag doped MnO₂ nanoparticles and methodologically studied their physical, morphological, and photosensitive properties through XRD, TEM, EDAX, Raman, UV, PL and N₂ adsorption - desorption study. Tetragonal crystalline arrangement with spherical nanoparticles was found out through XRD and TEM studies. The EDAX studies further supported that formation Ag in the MnO₂ crystal matrix. The bandgap energy of Ag doped MnO₂ was absorbed through UV spectra. Photo -generated recombination process and surface related defects were further recognized by PL spectra. Through visible light irradiation, the photo - degradation of methyl orange (MO) and phenol dye solutions were observed. The optimum condition of (10 wt% of Ag) Ag doped MnO₂ catalyst showed tremendous photocatalytic efficiency towards MO than phenol under same experimental study.

Keywords: Ag doped MnO(2); Electron-hole separation; Methyl orange; Photo-degradation; Sol-gel; Visible light.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Catalysis
Environmental Pollutants*
Light
Manganese Compounds
Nanostructures* / chemistry
Oxides
Titanium / chemistry
Water Purification*

Substances

Environmental Pollutants
Manganese Compounds
Oxides
Titanium