Title
Tailoring the luminescence and photocatalytic activity of KMn4(PO4)3 by Anions (N3− and S2−) doping
Author
CH Sudhakar Reddy, Ravi G, P. Venkataswamy, Sreenu K, Uzma Baig, M. Vithal
Year
2017
Journal
Journal of Chemical Technology and Biotechnology
Abstract
Phosphates of bivalent, trivalent, or quadrivalent transition metal cations with alkali or alkaline earth ions are promising materials in the field of materials science and technology. Anions doped phosphate materials have attracted considerable attention due to their potential applications in environmental remediation by degrading organic pollutants to less harmful byproducts. Thus, in the present work nitrogen / sulphur was doped into KMn4(PO4)3 (KMnPO) to improve its visible light photocatalytic activity. S or N-doped KMn4(PO4)3 (KMnPOS or KMnPON) were prepared by solid state method. The photocatalytic activities of these materials were evaluated by photodegradation of methylene blue, methyl violet and 4-chlorophenol. Quenching studies were carried out to identify the reactive species during the photodegradation of dyes. The photoluminescence property of phosphate materials was investigated, and the color coordinates were also calculated using CIE 1931 chromaticity. The obtained color coordinates give the information that KMnPO, KMnPON and KMnPOS phosphors were apt for blue components in LED, respectively. KMnPOS was a novel highly visible light response photocatalyst and can be reused for at least four times efficiently. The higher photocatalytic activity of KMPOS can be attributed to its lower electron–hole recombination rate and generation of more ●OH radicals during photoreaction.
Instrument
FP-8300
Keywords
Photoluminescence, Fluorescence, Materials, LEDs