scholarly journals HETEROGENEOUS PHOTOCATALYTIC OXIDATION OF NO2−IN AQUEOUS SUSPENSION OF VARIOUS SEMICONDUCTOR POWDERS

1985 ◽  
Vol 14 (9) ◽  
pp. 1429-1432 ◽  
Author(s):  
Yoshio Hori ◽  
Akiyoshi Nakatsu ◽  
Shin Suzuki
Keyword(s):  
Photocatalytic Oxidation ◽  
Aqueous Suspension

Environmentally Friendly Photocatalytic Oxidation of Aromatic Alcohol to Aldehyde in Aqueous Suspension of Brookite TiO2

2008 ◽  
Vol 126 (1-2) ◽  
pp. 58-62 ◽  
Author(s):  
Maurizio Addamo ◽  
Vincenzo Augugliaro ◽  
Marianna Bellardita ◽  
Agatino Di Paola ◽  
Vittorio Loddo ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Aqueous Suspension ◽  
Environmentally Friendly ◽  
Aromatic Alcohol

The Influence of Different Ph Values and High Concentrations of Na2SO4 and NaCl on the Photocatalytic Oxidation (PCO) of Methylene Blue (MB) by Aqueous Suspension of Nano-Sized TiO2

2012 ◽  
Vol 490-495 ◽  
pp. 3892-3896
Author(s):  
Yu Ping Jiang
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Oxidation ◽  
High Salinity ◽  
Aqueous Suspension ◽  
Ion Concentration ◽  
Ph Values ◽  
Orthogonal Experiments ◽  
Degradation Rates ◽  
The Difference ◽  
High Concentrations

To study the PCO of high-salinity organic wastewater, nano-sized TiO2 was used for PCO of MB in solutions with different pH values and high concentrations of Na2SO4 or NaCl. The rates of PCO were monitored by total organic carbon (TOC) measurement. The results showed that the degradation rates increased with increasing pH and decreased as the concentration of Na2SO4 or NaCl increased. The difference of degradation rates in Na2SO4 or NaCl aqueous solutions increased as the ion concentration increased. In the orthogonal experiments, the rates decreased remarkably under certain ratios of the ions concentration. The mechanisms were explored in some detail.

scholarly journals New Evidence of the Enhanced Elimination of a Persistent Drug Used as a Lipid Absorption Inhibitor by Advanced Oxidation with UV-A and Nanosized Catalysts

Catalysts ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 761 ◽  
Author(s):  
Narcisa Vrinceanu ◽  
Raluca Maria Hlihor ◽  
Andrei Ionut Simion ◽  
Lacramioara Rusu ◽  
Ildikó Fekete-Kertész ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Aqueous Suspension ◽  
Organic Pollutant ◽  
Lipid Absorption ◽  
Performance Study ◽  
Batch Mode ◽  
Primary Metabolite ◽  
Initial Substrate ◽  
Nanosized Catalysts ◽  
New Evidence

This work demonstrates new evidence of the efficient destruction and mineralization of an emergent organic pollutant using UV-A and titanium nanosized catalysts. The target compound considered in this work is the primary metabolite of a lipid regulator drug, clofibrate, identified in many studies as refractory during conventional wastewater treatment. The photocatalytic performance study was carried out in batch mode at laboratory scale, in aqueous suspension. Kinetic data showed that titanium dioxide P25 Aeroxide® exhibits the highest photocatalytic efficiency compared to the other investigated catalysts. Pollutant degradation and mineralization efficiencies strongly increased when decreasing the initial substrate concentration. Target molecules oxidized faster when the catalyst load increased, and the mineralization was enhanced under acidic conditions: 92% of mineralization was achieved at pH 4 after 190 min of reaction. Radical quenching assays confirmed that HO• and ( h vb + ) were the reactive oxygen species involved in the photocatalytic oxidation of the considered pollutant. In addition, further results revealed that the removal efficiency decreased in real water matrices. Finally, data collected through a series of phytotoxicity tests demonstrated that the photocatalytic process considerably reduces the toxicity of the treated solutions, confirming the process’s effectiveness in the removal of persistent and biorefractory emergent organic water pollutants.

scholarly journals Photocatalytic oxidation of aromatic alcohols to aldehydes in aqueous suspension of home-prepared titanium dioxide

2008 ◽  
Vol 349 (1-2) ◽  
pp. 182-188 ◽  
Author(s):  
Vincenzo Augugliaro ◽  
Horst Kisch ◽  
Vittorio Loddo ◽  
María José López-Muñoz ◽  
Carlos Márquez-Álvarez ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Oxidation ◽  
Aqueous Suspension ◽  
Aromatic Alcohols

scholarly journals Selective photocatalytic oxidation of 5-hydroxymethyl-2-furfural in aqueous suspension of polymeric carbon nitride and its adduct with H2O2 in a solar pilot plant

2018 ◽  
Vol 315 ◽  
pp. 138-148 ◽  
Author(s):  
Marina Ilkaeva ◽  
Igor Krivtsov ◽  
José R. García ◽  
Eva Díaz ◽  
Salvador Ordóñez ◽  
...  
Keyword(s):  
Pilot Plant ◽  
Photocatalytic Oxidation ◽  
Carbon Nitride ◽  
Aqueous Suspension ◽  
Polymeric Carbon

Photocatalytic oxidation of acetonitrile in aqueous suspension of titanium dioxide irradiated by sunlight

2004 ◽  
Vol 8 (3-4) ◽  
pp. 329-335 ◽  
Author(s):  
V. Augugliaro ◽  
A. Bianco Prevot ◽  
J. Cáceres Vázquez ◽  
E. Garcı́a-López ◽  
A. Irico ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Oxidation ◽  
Aqueous Suspension

scholarly journals Degradation of Malachite green using heterogeneous nanophotocatalysts (NiO/TiO2, CuO/TiO2) under solar and microwave irradiation

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Chafia Djebbari ◽  
Emna zouaoui ◽  
Nesrine Ammouchi ◽  
Chafika Nakib ◽  
Daoiya Zouied ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Malachite Green ◽  
Photocatalytic Oxidation ◽  
Advanced Oxidation Process ◽  
Dye Degradation ◽  
Aqueous Suspension ◽  
Heterogeneous Photocatalysis ◽  
Solar Irradiation ◽  
Wide Range ◽  
Catalyst Type

AbstractHeterogeneous photocatalysis is an advanced oxidation process (AOP). This technique is used to degrade a wide range of pollutants in water. In this study, photocatalytic oxidation and mineralization of malachite green in an aqueous suspension containing nickel-based catalysts and copper supported on TiO2 prepared by wet diffusional impregnation was studied using two sources of irradiation: solar and microwave. Photodegradation kinetics were studied according to several parameters, such as catalyst type, dye concentration, photocatalyst mass and microwave power. The results showed that the photodegradation of malachite green is faster in the presence of CuO/TiO2 catalyst than NiO/TiO2 catalyst than TiO2. Dye degradation by microwave irradiation is faster than that by solar irradiation.

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