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Vol. 35 No. 11 (2023): Vol 35 Issue 11, 2023

Copyright (c) 2023 S.N. MANJULA, M. CHANDRASEKHAR, M.R. ANIL KUMAR, N. RAGHAVENDRA, C.R. RAVIKUMAR, H.C. ANANDA MURTHY, H. NAGABHUSHANA

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MgAl2O4:Ho3+ Nanophosphors: Electrochemical Sensor, Photoluminescence and Photocatalytic Applications

https://doi.org/10.14233/ajchem.2023.28287
S.N. MANJULA
Department of Physics, SJR College for Women, Rajajinagar, Bengaluru-560010, India Research Center, Department of Science, East West Institute of Technology, (Affiliated to Visvesvaraya Technological University), Bangalore- 560091, India
https://orcid.org/0009-0006-7239-7205
M. CHANDRASEKHAR
Research Center, Department of Science, East West Institute of Technology, (Affiliated to Visvesvaraya Technological University), Bangalore- 560091, India
https://orcid.org/0009-0004-4589-2601
M.R. ANIL KUMAR
Department of Chemical and Materials Engineering, Gina Cody School of Engineering and Computer Science, Concordia University, Montreal, Canada, H3G 2W1
https://orcid.org/0000-0001-8228-0314
N. RAGHAVENDRA
Research Center, Department of Science, East West Institute of Technology, (Affiliated to Visvesvaraya Technological University), Bangalore- 560091, India
https://orcid.org/0000-0002-8397-4833
C.R. RAVIKUMAR
Research Center, Department of Science, East West Institute of Technology, (Affiliated to Visvesvaraya Technological University), Bangalore- 560091, India
https://orcid.org/0000-0002-4692-444X
H.C. ANANDA MURTHY
Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, PO Box 1888, Adama, Ethiopia Department of Prosthodontics, Saveetha Dental College & Hospital, Saveetha Institute of Medical and Technical Science (SIMATS), Saveetha University, Chennai-600077, India
https://orcid.org/0000-0002-2361-086X
H. NAGABHUSHANA
Prof. C.N.R. Rao Center for Advanced Materials, Tumkur University, Tumkur-572103, India
https://orcid.org/0000-0001-9716-0251

Corresponding Author(s) : C.R. RAVIKUMAR

Ravicr128@gmail.com

Asian Journal of Chemistry, Vol. 35 No. 11 (2023): Vol 35 Issue 11, 2023

Abstract

Ho3+-doped MgAl2O4 nanophosphors (1-11 mol%) was synthesised via solution combustion method using oxalyl dihydrazide (ODH) as fuel. The findings revealed a range of band gap energies (Eg) between 4.86 and 5.42 eV. It was confirmed that these values correspond extremely well with the experimental data using the DFT approach. The Ho3+ ions in the host undergo f-f transitions that are triggered at 406 nm and as a result, exhibit discrete photoluminescence emission peaks between 406 and 605 nm. Enhanced MgAl2O4 have CIE coordinates from orange-red to yellow region and 97% colour purity. Photocatalytic properties of nanophosphors under UV light led to the discovery that a rapid orange-red dye is activated at 493 nm. Removal of fast orange red (F-OR) dye using the new photocatalysts and MgAl2O4:Ho3+ nanophosphors has been demonstrated. The investigation showed that 89.02% of the dye lost its colour after being exposed to radiation for 120 min. The modified MgAl2O4:Ho3+ carbon paste electrode used in the cyclic voltametric (CV) technique for lead pollution detection. Based on their electrochemical performance, it is concluded that MgAl2O4:Ho3+ nanophosphors are a viable material for lead detecting electrodes.

Keywords

Nanophosphors MgAl2O4:Ho3+ Solution combustion Fast orange red dye Photocatalysis Electrochemical sensor
MANJULA, S., CHANDRASEKHAR, M., KUMAR, M. A., RAGHAVENDRA, N., RAVIKUMAR, C., MURTHY, H. A., & NAGABHUSHANA, H. (2023). MgAl2O4:Ho3+ Nanophosphors: Electrochemical Sensor, Photoluminescence and Photocatalytic Applications. Asian Journal of Chemistry, 35(11), 2659–2667. https://doi.org/10.14233/ajchem.2023.28287
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