relation: https://khub.utp.edu.my/scholars/14169/
title: Synthesis of Black-TiO2 and manganese-doped TiO2 nanoparticles and their comparative performance evaluation for photocatalytic removal of phenolic compounds from agro-industrial effluent
creator: Nawaz, R.
creator: Kait, C.F.
creator: Chia, H.Y.
creator: Isa, M.H.
creator: Huei, L.W.
creator: Sahrin, N.T.
description: In this paper, the synthesis, characterization, and comparative performance of Black-TiO2 and manganese-doped TiO2 (Mn-TiO2) nanoparticles for photocatalytic removal of phenolic compounds from agro-industrial effluent known as treated palm oil mill effluent (TPOME) are reported. The Black-TiO2 nanoparticles were synthesized via a green synthesis approach using a renewable chemical, glycerol as a reducing agent. The Mn-TiO2 nanoparticles were synthesized via the wet impregnation method using potassium permanganate (KMnO4) as a precursor. Experimental results revealed that both types of TiO2 nanoparticles, Black-TiO2 and Mn-TiO2 nanoparticles were anatase phase with a particle size range from 30�80 nm, improved visible light absorption and narrow bandgap of 2.96 and 2.12 eV, respectively. The improved visible light absorption was ascribed to the presence of Ti3+ defect states in Black-TiO2 nanoparticles and the substation of Mn into TiO2 matrix in Mn-TiO2 nanoparticles. The improved visible light absorption led to the enhanced photocatalytic performance of Black-TiO2 and Mn-TiO2 nanoparticles. The former was able to remove 48.17 whereas the latter removed 39.11 of 224.85 mg/L of phenolic compounds from TPOME under 180 min of visible light irradiation. The Black-TiO2 and Mn-TiO2 nanoparticles showed 2.2-fold and 1.7-fold higher performance, respectively, than the Pure-TiO2 nanoparticles. The Black-TiO2 nanoparticles exhibited superior photocatalytic performance, and the highest reaction rate constant (Kapp = 0.31127) was achieved which is two-fold higher than the one obtained by Pure-TiO2 nanoparticles (Kapp = 0.14733). The recyclability test showed that Mn-TiO2 nanoparticles were more stable indicated by their negligible loss (1.55) of photoactivity after five repeated cycles. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
publisher: Springer Science and Business Media B.V.
date: 2021
type: Article
type: PeerReviewed
identifier:   Nawaz, R. and Kait, C.F. and Chia, H.Y. and Isa, M.H. and Huei, L.W. and Sahrin, N.T.  (2021) Synthesis of Black-TiO2 and manganese-doped TiO2 nanoparticles and their comparative performance evaluation for photocatalytic removal of phenolic compounds from agro-industrial effluent.  Journal of Nanoparticle Research, 23 (12).   ISSN 13880764     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85120172574&doi=10.1007%2fs11051-021-05373-4&partnerID=40&md5=d6f81e21635ed8d354bd7328b6fb9e84
relation: 10.1007/s11051-021-05373-4
identifier: 10.1007/s11051-021-05373-4