@article{scholars9485,
             doi = {10.1016/j.molliq.2018.09.077},
            note = {cited By 30},
          volume = {272},
           title = {Visible light driven CO2 reduction to methanol by Cu-porphyrin impregnated mesoporous Ti-MCM-48},
            year = {2018},
           pages = {656--667},
       publisher = {Elsevier B.V.},
         journal = {Journal of Molecular Liquids},
        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{\^a}??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 {\^I}1/4mol g{\^a}??1 L{\^a}??1) with a BET surface area of 1528 m2 g{\^a}??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 {\^I}1/4mol{\^A}.g{\^a}??1 under 33 mW{\^A}.cm{\^a}??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. {\^A}{\copyright} 2018 Elsevier B.V.},
        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},
             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},
            issn = {01677322},
          author = {Nadeem, S. and Mumtaz, A. and Mumtaz, M. and Abdul Mutalib, M. I. and Shaharun, M. S. and Abdullah, B.}
}