Methanol Artificial Photosynthesis Using Iron Doped TiO&lt;SUB&gt;2&lt;/SUB&gt;

Abidov, Amir; Allabergenov, Bunyod; Tursunkulov, Oybek; He, Linghao; BeomHyeok, Park; Kim, Hee‐Joon; Kim, Sungjin

doi:10.1166/jbmb.2014.1429

Cited by 2 publications

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“…This shift causes a decrease in the bandgap energy of the Ti02 semiconductor to 2.93 eV. This reduction was smaller than the values reported for the Fe-doped Ti02 material [10,11], probably due to the relatively lower amount of Fe 3+ -Chl material adsorbed in Ti02. Increasing the concentration of dopant metal in 0.0…”

Section: Discussionmentioning

confidence: 67%

“…The insertion of about 2% copper(II) metal ions in the Ti02 structure without the occurrence of cation exchange has lowered the £gap of the material to 2.86 eV [8], while the doping of Ti02 with Cu metal by up to 2.5 %, which causes cation exchange reduces the bandgap energy to visible light [ 9 ]. Doping of Fe 3+ ion into Ti02 to form Ti02 / Fe 203 material shifts the valence band positively and has been reported to be photoactive in the photosynthetic reactions of methanol under visible light [10,11,12]. The combination of chlorophyll dye properties and the transition metal coordinated with the chlorophyll ligand incorporated with the Ti02 material is expected to reduce the bandgap energy.…”

Section: Introductionmentioning

confidence: 99%

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Bandgap Energy of TiO₂/M-Chlorophyll Material (M=Cu²⁺, Fe³⁺)

2021

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The bandgap energy (Egap) of TiO2 material modified with metal-chlorophyll complex compounds (M = Cu2+, Fe3+) was observed. Chlorophyll (Chl) was isolated from cassava leaves, and its UV-Vis spectra showed absorption peaks in the Soret band region (410 nm) and in the Q band region (665 nm), which is the typical peak of chlorophyll. Copper(II)-chlorophyll complex was prepared from the reaction between chlorophyll and CuSO4.5H2O, while the iron(III)-chlorophyll was synthesized from chlorophyll and FeCl3.6H2O in methanol solvent under reflux at 65°C. The presence of copperand iron metals in the chlorophyll metal complexes was identified using Atomic Absorption Spectroscopy in methanol solution. The absorption of copper measured in Cu2+-Chl was 0.0488 (0.4805 mg/L), while the iron atom in Fe3+-Chl was 0.0050 (0.0195 mg/L). The UV-vis spectra demonstrate the hypsochromic shift of the Soret band to 405 nm (Cu2+-Chl) and 402 nm (Fe3+-Chl). The Infrared spectra of chlorophyll after being complexed with copper(II) shows the increase of vibrational absorption wavenumber of the C=N group from 1225.06 cm-1 to 1241.94 cm-1 indicates the coordination of the metal ion on the N atom in the pyrrole ring. The shift in the absorption band on the Fe3+-Chl spectrum was seen for the C=O ester group from 1720.49 cm-1 to 1721.10 cm-1 indicating the metal ion bonding in the C=O group of esters. The DR-UVis analysis of TiO2/metal-chlorophyll shows a bathochromic shift towards the visible light region. By using the Tauc plot method, it was observed that the Egap of TiO2 reduces from 3.08 eV to 2.89 eV and 2.93 eV in the compound of TiO2/Cu2+-Chl and TiO2/Fe3+-Chl, respectively.

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Section: Discussionmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Bandgap Energy of TiO₂/M-Chlorophyll Material (M=Cu²⁺, Fe³⁺)

2021

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Fabrication and Characterization of Amine Compounds Synthesized from Carbon Dioxide and Ammonia Water Using Transition Metal Doped TiO<sub>2</sub>

Abidov

Allabergenov

Xiao

et al. 2015

AMM

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Capture and reforming fume gases from atmosphere became an ultimate task recently. Photocatalytic reduction to useful compounds is a key to the future. Photoinduced reduction of carbon dioxide and ammonia aqueous solution into amine compounds at room temperature and atmospheric pressure using transition metal doped titanium dioxide is reported in this paper. UV-visible spectra showed a high absorbance at 200 nm wavelength which is a characteristic of urea. High Performance Liquid Chromatography revealed presence of amine compounds and urea was found a main product of photocatalytic reaction.

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Methanol Artificial Photosynthesis Using Iron Doped TiO<SUB>2</SUB>

Cited by 2 publications

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Bandgap Energy of TiO₂/M-Chlorophyll Material (M=Cu²⁺, Fe³⁺)

Bandgap Energy of TiO₂/M-Chlorophyll Material (M=Cu²⁺, Fe³⁺)

Fabrication and Characterization of Amine Compounds Synthesized from Carbon Dioxide and Ammonia Water Using Transition Metal Doped TiO<sub>2</sub>

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