Enhanced visible light photocatalytic activity of porous LaMnO3 sub-micron particles in the degradation of rose bengal. (September 2017)

• Record Type: Journal Article
• Authors: Kumar, S. Rajesh; Abinaya, C.V.; Amirthapandian, S.; Ponpandian, N.
• Is Part Of: Materials research bulletin. Volume 93(2017)
• Page Start: 270
• Page End: 281
• Publication Date: 2017-09
• Subjects: Chemical synthesis -- Surface properties -- Transmission electron microscope -- Microstructure -- Catalytic properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2017.05.024
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: The monodispersed LaMnO3 microstructure was prepared by hydrothermal method. The growth of different shaped LaMnO3 particles was obtained by varying annealing temperatures. Porous LaMnO3 microstructure possessed superior photocatalytic activity in rose bengal dye. The morphology and high surface area influence the enhanced photocatalytic activity. Abstract: A perovskite LaMnO3 micro/nanostructure is a promising high-efficiency photocatalytic materials for the removal of various organic pollutants. This study presents the preparation of sub-micron LaMnO3 particles with polyvinyl pyrrolidone (PVP) as a structure directing agent to control the primary morphology and aggregations. Furthermore, the sample was annealed at different temperatures to improve the crystallinity and perovskite phase formations. The possible formation mechanism was explained based on the annealing temperatures. An attempt has been made to study the effect of different morphologies of LaMnO3 particles for the degradation of RB dye under visible light irradiation. The removal efficiency of 95% for RB dye in 60 min evidences the superior degradation capability of highly porous LaMnO3 particles. The photocatalytic activity not only depends on porous structure, but also strongly based on crystallinity, and specific surface area of LaMnO3 particles. Hence, the porous morphology displays a superior photocatalytic activity than other LaMnO3 microstructures.