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Enhanced Catalytic and Photocatalytic Degradation of Organic Pollutant Rhodamine‐B by LaMnO 3 Nanoparticles Synthesized by Non‐Aqueous Sol‐Gel Route
Author(s) -
Dhiman Tarun K.,
Singh Satyendra
Publication year - 2019
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201900012
Subject(s) - photocatalysis , rhodamine b , nanoparticle , materials science , catalysis , zeta potential , aqueous solution , visible spectrum , chemical engineering , photochemistry , inorganic chemistry , nanotechnology , chemistry , optoelectronics , organic chemistry , engineering
The water crisis is one of the major problem of the 21 st century. This has led to the development of various techniques for water purification such as wastewater treatment. In this technique, coloring dyes are one of the most challenging materials to treat. Rhodamine‐B (RhB) is one of the significant coloring agent and is very difficult to treat using conventional techniques. Here, the enhanced catalytic and photocatalytic degradation of RhB by LaMnO 3 nanoparticles is reported. The sol‐gel route is used for the synthesis of LaMnO 3 nanoparticles, and structural, magnetic, optical and zeta potential studies are performed. X‐ray diffraction analysis confirms the rhombohedral perovskite structure with R3c space group. The magnetic measurement at 5 K shows that saturation magnetization value increases with an increase in particle size. UV–vis absorption study of LaMnO 3 nanoparticles confirms the optical band gap decreases with increasing size. Zeta potential study of LaMnO 3 nanoparticles shows a negative charge on the surface. Degradation of organic pollutant RhB by nanoparticles of LaMnO 3 is performed under dark, followed by visible light irradiation. Under the dark, 90–92% of the RhB is degraded. Subsequently, upon visible light irradiation, it increased above 99%, confirming enhanced catalytic and photocatalytic activity of LaMnO 3 nanoparticles over RhB.