eprintid: 9485
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/94/85
datestamp: 2023-11-09 16:36:07
lastmod: 2023-11-09 16:36:07
status_changed: 2023-11-09 16:29:06
type: article
metadata_visibility: show
creators_name: Nadeem, S.
creators_name: Mumtaz, A.
creators_name: Mumtaz, M.
creators_name: Abdul Mutalib, M.I.
creators_name: Shaharun, M.S.
creators_name: Abdullah, B.
title: Visible light driven CO2 reduction to methanol by Cu-porphyrin impregnated mesoporous Ti-MCM-48
ispublished: pub
keywords: Carbon dioxide; Copper compounds; Light; Mass transfer; Mesoporous materials; Methanol; Molecular orbitals; Photocatalysts; Porphyrins; Sodium hydroxide; Sodium sulfite, Lowest occupied molecular orbitals; Mass transfer limitation; Mesoporous; Metalloporphyrins; Supporting electrolyte; Ti-mcm-48; Visible light excitation; Visible-light irradiation, Titanium compounds
note: cited By 30
abstract: Mesoporous Ti-MCM-48 photocatalyst, with Si/Ti (wt/wt) ratio of 100, 50 and 25 was effectively applied for CO2 reduction into methanol under UV�visible light irradiation bearing mid gap energy states and Ti3+ sites. The bare Ti-MCM-48 with Si/Ti (wt/wt) ratio of 25 displayed highest photocatalytic methanol yield (85.88 μmol g�1 L�1) with a BET surface area of 1528 m2 g�1 and mid gap energy states as determined from the XPS analysis, compared to the other composite ratios. The Ti-MCM-48(25) impregnated with Cu-porphyrin (CuTPP) resulted in methanol yield of 297 μmol·g�1 under 33 mW·cm�2 simulated light intensity, using 0.1 M Na2SO3 in 0.1 M NaOH as supporting electrolytes, which is 3.45 times higher than the bare Ti-MCM-48(25) due to the visible light excitation of the porphyrin macrocycle and charge transition from the lowest occupied molecular orbital (LUMO) of CuTPP to the Ti3+ metal centers. Also, methanol yield was studied with CO2 gas-liquid mass transfer and mass transfer limitations prevailing in the reactor. Mass transfer limitation experiments revealed that metal loading, catalyst concentration, stirring speed and light intensity influence the methanol yield. © 2018 Elsevier B.V.
date: 2018
publisher: Elsevier B.V.
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85054334683&doi=10.1016%2fj.molliq.2018.09.077&partnerID=40&md5=c457811f3a8f3bf878cdc0528994777d
id_number: 10.1016/j.molliq.2018.09.077
full_text_status: none
publication: Journal of Molecular Liquids
volume: 272
pagerange: 656-667
refereed: TRUE
issn: 01677322
citation:   Nadeem, S. and Mumtaz, A. and Mumtaz, M. and Abdul Mutalib, M.I. and Shaharun, M.S. and Abdullah, B.  (2018) Visible light driven CO2 reduction to methanol by Cu-porphyrin impregnated mesoporous Ti-MCM-48.  Journal of Molecular Liquids, 272.  pp. 656-667.  ISSN 01677322