Effect of Fe3+ substitution on the structural modification and band structure modulated UV absorption of hydroxyapatite

Hadagalli, K and Shenoy, S and Shakya, KR and Manjunath, G and Tarafder, K and Mandal, S and Basu, B (2020) Effect of Fe3+ substitution on the structural modification and band structure modulated UV absorption of hydroxyapatite. In: International Journal of Applied Ceramic Technology . (In Press)

	PDF Int-Jou- App-Cer-Tec-2020.pdf - Accepted Version Restricted to Registered users only Download (2MB) | Request a copy
	Microsoft PowerPoint ijac13674-sup-0001-supinfo.docx - Published Supplemental Material Restricted to Registered users only Download (236kB) | Request a copy

Abstract

The effect of Fe3+ ionic substitution in hydroxyapatite (Ca10-xFex(PO4)6(OH)2) was studied using structural modifications, resulting in an improvement in UV absorption through a tailored optical band structure. Ca2+ of HA being larger compared to Fe3+ contributes to the shrinkage of the lattice. Undoped HA has a peak at 1085 cm�1 (�3 PO43�) which is shifted to 1033 cm�1 for Fe-HA, because of the perturbation in HA structure. An improvement of UV absorption in the entire UVA and UVB range with an increase in Fe content because of a decrease in bandgap from 5.9 eV to 2.1 eV with undoped and doped HA. Theoretically obtained band gap and optical behaviour of the systems are well correlated with the experimental findings. Moreover, the use of marine biowaste from cuttlefish bone, as the source of HA; low cost and promising UV absorption can have a potential application as UV protective sunscreen filters. © 2020 The American Ceramic Society

Item Type:	Journal Article
Publication:	International Journal of Applied Ceramic Technology
Publisher:	Blackwell Publishing Ltd
Additional Information:	cited By 0; Blackwell Publishing Ltd
Keywords:	Energy gap; Hydroxyapatite; Light absorption, Cuttlefish bones; Fe content; Ionic substitutions; Optical band structure; Optical behaviour; Structural modifications; UV absorption; Uv-protective, Calcium alloys
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Interdisciplinary Sciences > Centre for Biosystems Science and Engineering
Date Deposited:	29 Jan 2021 09:54
Last Modified:	29 Jan 2021 09:54
URI:	http://eprints.iisc.ac.in/id/eprint/67845

Actions (login required)

View Item