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Title: Enhanced visible light photocatalytic activity of porous LaMnO{sub 3} sub-micron particles in the degradation of rose bengal

Abstract

Highlights: • The monodispersed LaMnO{sub 3} microstructure was prepared by hydrothermal method. • The growth of different shaped LaMnO{sub 3} particles was obtained by varying annealing temperatures. • Porous LaMnO{sub 3} microstructure possessed superior photocatalytic activity in rose bengal dye. • The morphology and high surface area influence the enhanced photocatalytic activity. - Abstract: A perovskite LaMnO{sub 3} micro/nanostructure is a promising high-efficiency photocatalytic materials for the removal of various organic pollutants. This study presents the preparation of sub-micron LaMnO{sub 3} 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 LaMnO{sub 3} 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 LaMnO{sub 3} particles. The photocatalytic activity not only depends on porous structure, but also strongly based on crystallinity, and specific surface area of LaMnO{sub 3} particles. Hence, the porous morphologymore » displays a superior photocatalytic activity than other LaMnO{sub 3} microstructures.« less

Authors:
 [1];  [2];  [3];  [1]
  1. Department of Nanoscience and Technology, Bharathiar University, Coimbatore 641046 (India)
  2. Department of Biotechnology, Udaya School of Engineering, Udaya Nagar, Vellamodi, Kanyakumari 629 161 (India)
  3. Materials Physics Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102 (India)
Publication Date:
OSTI Identifier:
22730392
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 93; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANNEALING; CRYSTAL GROWTH; HYDROTHERMAL SYNTHESIS; LANTHANUM COMPOUNDS; MORPHOLOGY; PARTICLES; PHOTOCATALYSIS; PORE STRUCTURE; POROUS MATERIALS; ROSE BENGAL; SPECIFIC SURFACE AREA; SURFACE PROPERTIES; TRANSMISSION ELECTRON MICROSCOPY; VISIBLE RADIATION

Citation Formats

Kumar, S. Rajesh, Abinaya, C. V., Amirthapandian, S., and Ponpandian, N., E-mail: ponpandian@buc.edu.in. Enhanced visible light photocatalytic activity of porous LaMnO{sub 3} sub-micron particles in the degradation of rose bengal. United States: N. p., 2017. Web. doi:10.1016/J.MATERRESBULL.2017.05.024.
Kumar, S. Rajesh, Abinaya, C. V., Amirthapandian, S., & Ponpandian, N., E-mail: ponpandian@buc.edu.in. Enhanced visible light photocatalytic activity of porous LaMnO{sub 3} sub-micron particles in the degradation of rose bengal. United States. doi:10.1016/J.MATERRESBULL.2017.05.024.
Kumar, S. Rajesh, Abinaya, C. V., Amirthapandian, S., and Ponpandian, N., E-mail: ponpandian@buc.edu.in. Fri . "Enhanced visible light photocatalytic activity of porous LaMnO{sub 3} sub-micron particles in the degradation of rose bengal". United States. doi:10.1016/J.MATERRESBULL.2017.05.024.
@article{osti_22730392,
title = {Enhanced visible light photocatalytic activity of porous LaMnO{sub 3} sub-micron particles in the degradation of rose bengal},
author = {Kumar, S. Rajesh and Abinaya, C. V. and Amirthapandian, S. and Ponpandian, N., E-mail: ponpandian@buc.edu.in},
abstractNote = {Highlights: • The monodispersed LaMnO{sub 3} microstructure was prepared by hydrothermal method. • The growth of different shaped LaMnO{sub 3} particles was obtained by varying annealing temperatures. • Porous LaMnO{sub 3} microstructure possessed superior photocatalytic activity in rose bengal dye. • The morphology and high surface area influence the enhanced photocatalytic activity. - Abstract: A perovskite LaMnO{sub 3} micro/nanostructure is a promising high-efficiency photocatalytic materials for the removal of various organic pollutants. This study presents the preparation of sub-micron LaMnO{sub 3} 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 LaMnO{sub 3} 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 LaMnO{sub 3} particles. The photocatalytic activity not only depends on porous structure, but also strongly based on crystallinity, and specific surface area of LaMnO{sub 3} particles. Hence, the porous morphology displays a superior photocatalytic activity than other LaMnO{sub 3} microstructures.},
doi = {10.1016/J.MATERRESBULL.2017.05.024},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 93,
place = {United States},
year = {2017},
month = {9}
}