Photosynthesis of polyatomic organic molecules from carbon dioxide and water by the photocatalytic action of visible-light-illuminated platinized chlorophyll a dihydrate polycrystals

Fruge, D. R.; Fong, Gerald D.; Fong, Francis K.

doi:10.1021/ja00507a063

Cited by 34 publications

(4 citation statements)

References 4 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Contemporaneously, Hemminger et al 2 investigated the photosynthetic reaction of CO 2 and H 2 O in the gas phase to form CH 4 over Pt-SrTiO 3 . On the other hand, Fruge et al 3 described the formation of organic molecules from CO 2 + H 2 O over Pt that included chlorophyll under visible light irradiation. These reports on the CO 2 photocatalytic reduction with H 2 O having appeared from 1978 through 1980 stimulated many research groups, resulting in the active production of many following reports.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Reduction of CO₂ to CO in the Presence of H₂ or CH₄ as a Reductant over MgO

et al. 2003

View full text Add to dashboard Cite

MgO exhibits activity for the reduction of CO2 to CO under photoirradiation in the presence of H2 or CH4 as a reductant, although MgO is an insulating material. The present study clarified the mechanism of the CO2 photocatalytic reduction in the presence of H2 or CH4 over MgO. The electron paramagnetic resonance (EPR) spectra show that a CO2 molecule adsorbed on MgO was activated to a CO2 - radical under photoirradiation. In addition, it was confirmed by photoluminescence that new acceptor level built up between the valence band and the conduction band of MgO on CO2-adsorbed MgO. The CO2 - radical was reduced to a surface bidentate formate or a surface bidentate acetate by H2 or CH4 in the dark, respectively. The surface bidentate formate anchors on MgO as a photoactive species and reduces CO2 in the gas phase to CO since the CO2 photocatalytic reduction proceeded over MgO absorbing HCHO or CH3CHO and only 12CO was formed in the presence of 12CO2 over MgO modified by a 13C-labeled formate under irradiation. The active species was generated from the side-on adsorption-type bidentate carbonate selectively, although the two types of bidentate carbonates were detected by Fourier transform infrared (FT-IR) spectroscopy. On the other hand, the role of the surface bidentate acetate is under discussion. It is the first report that the substrate-modified insulating material exhibits activity in the CO2 photocatalytic reduction.

show abstract

Section: Introductionmentioning

confidence: 99%

Photocatalytic Reduction of CO₂ to CO in the Presence of H₂ or CH₄ as a Reductant over MgO

et al. 2003

View full text Add to dashboard Cite

show abstract

“…Illumination can be carried out by an Osram Ultramed 400W UV metal halide lamp that provides a high UVA irradiation with a controlled radiation flux values using neutral filters. It is possible to validate the scaling-up methodology with the bench scale photoreactor setup that has a total irradiation volume of 1250cm 3 (ten times higher than the laboratory scale). More details regarding the discussed reactor design (which was studied for cyanide removal and not phenol) such as dimensions, lamp type/position, electrical input power, UV emission spectrum and radiation flux can be found in [24][25][26].…”

Section: Photocatalytic Reactorsmentioning

confidence: 99%

“…Chlorophyll of plants is a typical natural photocatalyst (vital for photosynthesis). The difference between chlorophyll and synthesized titanium dioxide (TiO 2 ) photocatalysts [4], is that chlorophyll molecules absorb energy from sunlight to turn water and carbon dioxide into oxygen and glucose, whereas TiO 2 creates strong oxidation agents and electronic holes to breakdown the organic matter to carbon dioxide and water when light is available [3,4].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis for the Oxidation of Phenol with TiO2 in Wastewater Photocatalytic Reactors

Maddah

2018

Eng. Technol. Appl. Sci. Res.

View full text Add to dashboard Cite

Phenolic compounds in wastewater (even at low levels) are found to be quite toxic to humans due to their carcinogenic effects. Photocatalysis has been widely studied for the removal of phenol from industrial wastewater. In this study, photocatalytic oxidation of phenol, under UV irradiation in the presence of TiO2, has been numerically investigated. Phenol mass balance and forward finite difference method (explicit) along with various assumed/calculated parameters, from previous works, were used to numerically plot phenol concertation profiles in water with different initial phenol concentrations. Phenol compounds were observed to be totally oxidized at the bottom of the reactor and the maximum conversion rates occur near the reactor walls. It was found that higher irradiation times increase phenol oxidation rates due to higher water hydrolysis. Oxidation rate of phenol (consumption) increases with the increase in initial phenol concentration.

show abstract

“…Controlling current in a molecule with light stimulation may lead to optoelectronic switching devices 121. One mechanism of photoswitching is through light‐induced conformational changes in the molecule.…”

Section: Mechanically Controllable Break Junctionsmentioning

confidence: 99%

Mechanically Controllable Break Junctions for Molecular Electronics

et al. 2013

View full text Add to dashboard Cite

A mechanically controllable break junction (MCBJ) represents a fundamental technique for the investigation of molecular electronic junctions, especially for the study of the electronic properties of single molecules. With unique advantages, the MCBJ technique has provided substantial insight into charge transport processes in molecules. In this review, the techniques for sample fabrication, operation and the various applications of MCBJs are introduced and the history, challenges and future of MCBJs are discussed.

show abstract

Photosynthesis of polyatomic organic molecules from carbon dioxide and water by the photocatalytic action of visible-light-illuminated platinized chlorophyll a dihydrate polycrystals

Cited by 34 publications

References 4 publications

Photocatalytic Reduction of CO₂ to CO in the Presence of H₂ or CH₄ as a Reductant over MgO

Photocatalytic Reduction of CO₂ to CO in the Presence of H₂ or CH₄ as a Reductant over MgO

Numerical Analysis for the Oxidation of Phenol with TiO2 in Wastewater Photocatalytic Reactors

Mechanically Controllable Break Junctions for Molecular Electronics

Contact Info

Product

Resources

About

Photosynthesis of polyatomic organic molecules from carbon dioxide and water by the photocatalytic action of visible-light-illuminated platinized chlorophyll a dihydrate polycrystals

Cited by 34 publications

References 4 publications

Photocatalytic Reduction of CO2 to CO in the Presence of H2 or CH4 as a Reductant over MgO

Photocatalytic Reduction of CO2 to CO in the Presence of H2 or CH4 as a Reductant over MgO

Numerical Analysis for the Oxidation of Phenol with TiO2 in Wastewater Photocatalytic Reactors

Mechanically Controllable Break Junctions for Molecular Electronics

Contact Info

Product

Resources

About

Photocatalytic Reduction of CO₂ to CO in the Presence of H₂ or CH₄ as a Reductant over MgO

Photocatalytic Reduction of CO₂ to CO in the Presence of H₂ or CH₄ as a Reductant over MgO