Details
| Original language | English |
|---|---|
| Article number | 641 |
| Journal | CATALYSTS |
| Volume | 8 |
| Issue number | 12 |
| Early online date | 9 Dec 2018 |
| Publication status | Published - Dec 2018 |
Abstract
Photocatalytic reduction and hydrogenation reaction of o-dinitrobenzene in the presence of oxalic acid over anatase-brookite biphasic TiO 2 and non-metal-doped anatase-brookite biphasic TiO 2 photocatalysts under solar simulated light was investigated. Compared with commercial P25 TiO 2, the prepared un-doped and doped anatase-brookite biphasic TiO 2 exhibited a high selectivity towards the formation of o-nitroaniline (85.5%) and o-phenylenediamine ~97%, respectively. The doped anatase-brookite biphasic TiO 2 has promoted photocatalytic reduction of the two-nitro groups of o-dinitrobenzene to the corresponding o-phenylenediamine with very high yield ~97%. Electron paramagnetic resonance analysis, Transient Absorption Spectroscopy (TAS) and Photoluminescence analysis (PL) were performed to determine the distribution of defects and the fluorescence lifetime of the charge carriers for un-doped and doped photocatalysts. The superiority of the doped TiO 2 photocatalysts is accredited to the creation of new dopants (C, N, and S) as hole traps, the formation of long-lived Ti 3+ defects which leads to an increase in the fluorescence lifetime of the formed charge carriers. The schematic diagram of the photocatalytic reduction of o-dinitrobenzene using the doped TiO 2 under solar light was also illustrated in detail.
Keywords
- Nitroaromatic compounds, Non-metal-doped TiO, Photocatalysis, Reduction, Selectivity
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: CATALYSTS, Vol. 8, No. 12, 641, 12.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Highly Selective Photocatalytic Reduction of o-Dinitrobenzene to o-Phenylenediamine over Non-Metal-Doped TiO2 under Simulated Solar Light Irradiation
AU - El-Hosainy, Hamza M.
AU - El-Sheikh, Said M.
AU - Ismail, Adel A.
AU - Hakki, Amer
AU - Dillert, Ralf
AU - Killa, Hamada M.
AU - Ibrahim, Ibrahim A.
AU - Bahnemann, Detlef Bahnemann Detlef
N1 - Funding information: This work was supported by short cycle 5, Science & Technology Development Fund in Egypt (STDF fellowship) under Grant no. ID 12282. Acknowledgments: This work was supported by short cycle 5, Science & Technology Development Fund in Egypt (STDF fellowship) under Grant no. ID 12282. H. El-Hosainy acknowledges Institut für Technische Chemie, Leibniz Universität Hannover, Germany for hosting him during the current research work. The publication of this article was funded by the Open Access Fund of the Leibniz Universität Hannover.
PY - 2018/12
Y1 - 2018/12
N2 - Photocatalytic reduction and hydrogenation reaction of o-dinitrobenzene in the presence of oxalic acid over anatase-brookite biphasic TiO 2 and non-metal-doped anatase-brookite biphasic TiO 2 photocatalysts under solar simulated light was investigated. Compared with commercial P25 TiO 2, the prepared un-doped and doped anatase-brookite biphasic TiO 2 exhibited a high selectivity towards the formation of o-nitroaniline (85.5%) and o-phenylenediamine ~97%, respectively. The doped anatase-brookite biphasic TiO 2 has promoted photocatalytic reduction of the two-nitro groups of o-dinitrobenzene to the corresponding o-phenylenediamine with very high yield ~97%. Electron paramagnetic resonance analysis, Transient Absorption Spectroscopy (TAS) and Photoluminescence analysis (PL) were performed to determine the distribution of defects and the fluorescence lifetime of the charge carriers for un-doped and doped photocatalysts. The superiority of the doped TiO 2 photocatalysts is accredited to the creation of new dopants (C, N, and S) as hole traps, the formation of long-lived Ti 3+ defects which leads to an increase in the fluorescence lifetime of the formed charge carriers. The schematic diagram of the photocatalytic reduction of o-dinitrobenzene using the doped TiO 2 under solar light was also illustrated in detail.
AB - Photocatalytic reduction and hydrogenation reaction of o-dinitrobenzene in the presence of oxalic acid over anatase-brookite biphasic TiO 2 and non-metal-doped anatase-brookite biphasic TiO 2 photocatalysts under solar simulated light was investigated. Compared with commercial P25 TiO 2, the prepared un-doped and doped anatase-brookite biphasic TiO 2 exhibited a high selectivity towards the formation of o-nitroaniline (85.5%) and o-phenylenediamine ~97%, respectively. The doped anatase-brookite biphasic TiO 2 has promoted photocatalytic reduction of the two-nitro groups of o-dinitrobenzene to the corresponding o-phenylenediamine with very high yield ~97%. Electron paramagnetic resonance analysis, Transient Absorption Spectroscopy (TAS) and Photoluminescence analysis (PL) were performed to determine the distribution of defects and the fluorescence lifetime of the charge carriers for un-doped and doped photocatalysts. The superiority of the doped TiO 2 photocatalysts is accredited to the creation of new dopants (C, N, and S) as hole traps, the formation of long-lived Ti 3+ defects which leads to an increase in the fluorescence lifetime of the formed charge carriers. The schematic diagram of the photocatalytic reduction of o-dinitrobenzene using the doped TiO 2 under solar light was also illustrated in detail.
KW - Nitroaromatic compounds
KW - Non-metal-doped TiO
KW - Photocatalysis
KW - Reduction
KW - Selectivity
UR - http://www.scopus.com/inward/record.url?scp=85060875200&partnerID=8YFLogxK
U2 - 10.3390/catal8120641
DO - 10.3390/catal8120641
M3 - Article
VL - 8
JO - CATALYSTS
JF - CATALYSTS
SN - 2073-4344
IS - 12
M1 - 641
ER -