scholarly journals Systematic Assessment of Visible-Light-Driven Microspherical V2O5 Photocatalyst for the Removal of Hazardous Organosulfur Compounds from Diesel

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2908
Author(s):  
Iqrash Shafiq ◽  
Murid Hussain ◽  
Sumeer Shafique ◽  
Parveen Akhter ◽  
Ashfaq Ahmed ◽  
...  
Keyword(s):  
Active Sites ◽  
Photocatalytic Oxidation ◽  
Sulfur Removal ◽  
Diesel Oil ◽  
Liquid Fuels ◽  
Organosulfur Compounds ◽  
Systematic Assessment ◽  
Visible Light Driven ◽  
Ft Ir ◽  
Oil Blend

The organosulfur compounds present in liquid fuels are hazardous for health, asset, and the environment. The photocatalytic desulfurization technique works at ordinary conditions and removes the requirement of hydrogen, as it is an expensive gas, highly explosive, with a broader flammability range and is declared the most hazardous gas within a petroleum refinery, with respect to flammability. The projected work is based on the synthesis of V2O5 microspheres for photocatalytic oxidation for the straight-run diesel (SRD) and diesel oil blend (DOB). The physicochemical properties of V2O5 microspheres were examined by FT-IR, Raman, UV-vis DRS, SEM, and Photoluminescence evaluations. The as-synthesized photocatalyst presented a trivial unit size, a narrow bandgap, appropriate light-capturing capability, and sufficient active sites. The desulfurization study discovered that the anticipated technique is substantial in desulfurizing DOB up to 37% in 180 min using methanol as an interfacing agent. Furthermore, the outcome of employing a range of polar interfacing solvents was examined, and the 2-ethoxyethanol elevated the desulfurization degree up to 51.3%. However, the anticipated technology is constrained for its application in sulfur removal from SRD. Additionally, the mechanism for a photocatalytic reaction was seen in strong agreement with pseudo-first-order kinetics. The investigated photocatalyst exhibited a compromised recyclability and regeneration tendency.

Diffuse Reflectance FT-IR Characterization of Active Sites under Reaction Conditions: The Production of Oxygenates in the CO/H2 Reaction

1994 ◽  
Vol 48 (10) ◽  
pp. 1208-1212 ◽  
Author(s):  
J. J. Benítez ◽  
I. Carrizosa ◽  
J. A. Odriozola
Keyword(s):  
Infrared Spectra ◽  
Active Sites ◽  
Diffuse Reflectance ◽  
Reaction Conditions ◽  
In Situ Drifts ◽  
Ft Ir

The reactivity of a Lu2O3-promoted Rh/Al2O3 catalyst in the CO/H2 reaction is reported. Methane, heavier hydrocarbons, methanol, and ethanol are obtained. In situ DRIFTS has been employed to record the infrared spectra under the actual reaction conditions. The structure of the observed COads DRIFTS bands has been resolved into its components. The production of oxygenates (methanol and ethanol) has been correlated with the results of the deconvolution calculation. Specific sites for the production of methanol and ethanol in the CO/H2 reaction over a Rh,Lu2O3/Al2O3 catalyst are proposed.

Photocatalytic oxidation of gas-phase Hg0 by carbon spheres supported visible-light-driven CuO–TiO2

2017 ◽  
Vol 46 ◽  
pp. 416-425 ◽  
Author(s):  
Jiang Wu ◽  
Chaoen Li ◽  
Xiantuo Chen ◽  
Jing Zhang ◽  
Lili Zhao ◽  
...  
Keyword(s):  
Visible Light ◽  
Gas Phase ◽  
Photocatalytic Oxidation ◽  
Carbon Spheres ◽  
Visible Light Driven

Effect of Oxygen and Water in the CO Photocatalytic Oxidation with TiO2

2011 ◽  
Vol 324 ◽  
pp. 149-152
Author(s):  
Carlos Youssef ◽  
Eric Puzenat ◽  
Samir Najm ◽  
Nicole Jaffrezic-Renault ◽  
Chantal Guillard
Keyword(s):  
Water Vapor ◽  
Active Sites ◽  
Photocatalytic Oxidation ◽  
Low Oxygen ◽  
High Concentration ◽  
Co Concentration ◽  
Langmuir Hinshelwood Mechanism ◽  
Effect Of Oxygen ◽  
Two Parameters ◽  
Low Oxygen Concentration

TiO2P25 catalyst was used to study the photocatalytic oxidation of CO to CO2at 288K. Two parameters, O2and H2O were used to study its effect on the photocatalytic process. The dependency of the reaction rate on the CO concentration and water vapor was explained in terms of Langmuir-Hinshelwood mechanism. The presence of a high concentration of water vapor inhibits the CO photocatalytic oxidation at low oxygen concentration. We have noted an adsorption competition between CO and H2O on the TiO2active sites.

scholarly journals New Discorhabdin Alkaloids from the Antarctic Deep-Sea Sponge Latrunculia biformis

Marine Drugs ◽  
2019 ◽  
Vol 17 (8) ◽  
pp. 439 ◽  
Author(s):  
Li ◽  
Peifer ◽  
Janussen ◽  
Tasdemir
Keyword(s):  
Anticancer Activity ◽  
Deep Sea ◽  
Topoisomerase I ◽  
Active Sites ◽  
Binding Potential ◽  
Chemical Structures ◽  
Ic50 Values ◽  
Ft Ir ◽  
The Antarctic

The sponge genus Latrunculia is a prolific source of discorhabdin type pyrroloiminoquinone alkaloids. In the continuation of our research interest into this genus, we studied the Antarctic deep-sea sponge Latrunculia biformis that showed potent in vitro anticancer activity. A targeted isolation process guided by bioactivity and molecular networking-based metabolomics yielded three known discorhabdins, (−)-discorhabdin L (1), (+)-discorhabdin A (2), (+)-discorhabdin Q (3), and three new discorhabdin analogs (−)-2-bromo-discorhabdin D (4), (−)-1-acetyl-discorhabdin L (5), and (+)-1-octacosatrienoyl-discorhabdin L (6) from the MeOH-soluble portion of the organic extract. The chemical structures of 1–6 were elucidated by extensive NMR, HR-ESIMS, FT-IR, [α]D, and ECD (Electronic Circular Dichroism) spectroscopy analyses. Compounds 1, 5, and 6 showed promising anticancer activity with IC50 values of 0.94, 2.71, and 34.0 µM, respectively. Compounds 1–6 and the enantiomer of 1 ((+)-discorhabdin L, 1e) were docked to the active sites of two anticancer targets, topoisomerase I-II and indoleamine 2,3-dioxygenase (IDO1), to reveal, for the first time, the binding potential of discorhabdins to these proteins. Compounds 5 and 6 are the first discorhabdin analogs with an ester function at C-1 and 6 is the first discorhabdin bearing a long-chain fatty acid at this position. This study confirms Latrunculia sponges to be excellent sources of chemically diverse discorhabdin alkaloids.

UV−Vis and FT-IR Study of the Nature and Location of the Active Sites of Partially Exchanged Co−H Zeolites

2004 ◽  
Vol 108 (7) ◽  
pp. 2120-2127 ◽  
Author(s):  
Tania Montanari ◽  
Maria Bevilacqua ◽  
Carlo Resini ◽  
Guido Busca
Keyword(s):  
Active Sites ◽  
Ft Ir ◽  
Ir Study

Designed synthesis of unique ZnS@[email protected] hollow nanospheres for efficient visible-light-driven H2 evolution

CrystEngComm ◽  
2020 ◽  
Vol 22 (16) ◽  
pp. 2743-2755 ◽  
Author(s):  
Bowen Sun ◽  
Hui Wang ◽  
Jiakun Wu ◽  
Yanling Geng ◽  
Jixiang Xu ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Charge Separation ◽  
Active Sites ◽  
Light Harvesting ◽  
H2 Evolution ◽  
Hollow Nanospheres ◽  
Visible Light Driven ◽  
Designed Synthesis

Unique ZnS@[email protected] hollow nanospheres with abundant active sites and enhanced light-harvesting and charge separation demonstrate efficient H2 evolution from visible-light-driven water-splitting.

scholarly journals Ultrafast time-resolved quantum cascade laser diagnostic for revealing the role of surface formate species in the photocatalytic oxidation of methanol

2020 ◽  
Vol 10 (16) ◽  
pp. 5618-5627 ◽  
Author(s):  
Josefine Schnee ◽  
Marco Daturi ◽  
Mohamad El-Roz
Keyword(s):  
Ir Spectroscopy ◽  
Photocatalytic Oxidation ◽  
Time Resolved ◽  
Quantum Cascade ◽  
Oxidation Of Methanol ◽  
Laser Diagnostic ◽  
Surface Formate ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

QCL-assisted operando FT-IR spectroscopy revealed the role of surface formate species in the photocatalytic oxidation of methanol over TiO2.

Sign in / Sign up

Export Citation Format

Share Document