title: Bio-inspired route for the synthesis of spherical shaped MgO:Fe(3+) nanoparticles: Structural, photoluminescence and photocatalytic investigation.
abstract: MgO:Fe(3+) (0.1-5 mol%) nanoparticles (NPs) were synthesized via eco-friendly, inexpensive and simple low temperature solution combustion route using Aloe vera gel as fuel. The final products were characterized by SEM, TEM and HRTEM. PXRD data and Rietveld analysis revealed the formation of cubic system. The influence of Fe(3+) ion concentration on the structure morphology, UV absorption, PL emission and photocatalytic activity of MgO:Fe(3+) NPs were investigated. The yellow emission with CIE chromaticity coordinates (0.44, 0.52) and average correlated color temperature value was found to be 3540 K which corresponds to warm light of NPs. The control of Fe(3+) on MgO matrix influences the photocatalytic decolorization of methylene blue (MB) under UV light. The enhanced photocatalytic activity of MgO:Fe(3+) (4 mol%) was attributed to dopant concentration, effective crystallite size, textural properties, decreased band gap and capability for reducing the electron-hole pair recombination. Further, the trends of inhibitory effect in the presence of different radical scavengers were explored. These findings open up new avenues for the exploration of Fe-doped MgO in eco-friendly water applications and in the process of display devices.
authors.affiliation: Department of Science, Research Center, East West Institute of Technology, Bangalore 560 091, India.
authors.forename: M R
authors.initials: MR
authors.lastname: Anilkumar
authors.affiliation: Department of Science, Research Center, East West Institute of Technology, Bangalore 560 091, India. Electronic address: nagaswarupa77@gmail.com.
authors.forename: H P
authors.initials: HP
authors.lastname: Nagaswarupa
authors.affiliation: Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572 103, India.
authors.forename: H
authors.initials: H
authors.lastname: Nagabhushana
authors.affiliation: Dayananda Sagar University, Shavige Malleshwara Hills, Kumaraswamy Layout, Bangalore 560078, Karnataka, India.
authors.forename: S C
authors.initials: SC
authors.lastname: Sharma
authors.affiliation: Department of Physics, Lal Bahadur Shastry Government First Grade College, Bangalore 560 032, India. Electronic address: vidyays.phy@gmail.com.
authors.forename: Y S
authors.initials: YS
authors.lastname: Vidya
authors.affiliation: Department of Science, Research Center, East West Institute of Technology, Bangalore 560 091, India. Electronic address: ananth.che@gmail.com.
authors.forename: K S
authors.initials: KS
authors.lastname: Anantharaju
authors.affiliation: Department of Science, Research Center, East West Institute of Technology, Bangalore 560 091, India.
authors.forename: S C
authors.initials: SC
authors.lastname: Prashantha
authors.affiliation: Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India.
authors.forename: C
authors.initials: C
authors.lastname: Shivakuamra
authors.affiliation: Department of Science, Research Center, East West Institute of Technology, Bangalore 560 091, India.
authors.forename: K
authors.initials: K
authors.lastname: Gurushantha
mesh_terms: D002384:Catalysis; D003116:Color; D003460:Crystallization; D016166:Free Radical Scavengers / Q000737:chemistry; D055772:Green Chemistry Technology / Q000379:methods*; D007501:Iron / Q000737:chemistry*; D049449:Luminescence; D008277:Magnesium Oxide / Q000737:chemistry*; D008751:Methylene Blue / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D011208:Powders; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
chemical_list: D016166:Free Radical Scavengers; D011208:Powders; D008277:Magnesium Oxide; D007501:Iron; D008751:Methylene Blue
keywords: Aloe vera gel; Green synthesis; MgO:Fe(3+) NPs; Photocatalysis; Photoluminescence