Tungsten trioxide and titanium dioxide photocatalytic degradations of quinoline

Application of Porous Nickel-Coated TiO2 for the Photocatalytic Degradation of Aqueous Quinoline in an Internal Airlift Loop Reactor

“…The use of TiO 2 is an attractive technique for the complete destruction of undesirable liquid and gaseous contaminants by ultraviolet (UV) light or solar illumination. For quinoline degradation, many microscale/nanoscale catalysts like phase-pure TiO 2 , TiO 2 (Degussa P25), doped TiO 2 , and WO 3 [ 3 , 4 , 5 , 6 ] have been applied in different slurry systems. For example, the use of S-doped TiO 2 powder in a stirred slurry reactor presented high degradation efficiency under these experimental conditions regardless of the catalyst recovery and reuse [ 5 , 6 ], whereas both OH·and O 2 ·radicals generated in the photocatalytic process led to the opening of a heterocyclic ring [ 7 ].…”

“…For quinoline degradation, many microscale/nanoscale catalysts like phase-pure TiO 2 , TiO 2 (Degussa P25), doped TiO 2 , and WO 3 [ 3 , 4 , 5 , 6 ] have been applied in different slurry systems. For example, the use of S-doped TiO 2 powder in a stirred slurry reactor presented high degradation efficiency under these experimental conditions regardless of the catalyst recovery and reuse [ 5 , 6 ], whereas both OH·and O 2 ·radicals generated in the photocatalytic process led to the opening of a heterocyclic ring [ 7 ]. Some cases mainly focused on suspended slurry systems and proved that nanometer TiO 2 powders with high crystallinities and large specific surface areas are efficient for water purification at ambient conditions.…”

Enhancement of synergistic effect photocatalytic/persulfate activation for degradation of agro pesticides residues by ternary nanocomposite ZnO/TiO2/MgO

“…The abuse of pesticides leads to toxic residues in agricultural products (active ingredients imidacloprid, acetamiprid, fipronil, abamectin, etc) often exceeding the allowable threshold, reducing value of the product, directly affecting the health of workers and consumers, causing environmental pollution and imbalance in the agricultural ecosystem [1,5]. Finding solutions to reduce pollutants, improve the quality of agricultural products, and limit negative impacts caused by using pesticides on the environment is very urgent.…”

“…The photocatalytic process belongs to the category of Advanced oxidation processes (AOPs), on the one hand generate reactive oxygen species -ROS such as free radicals (•OH), (SO4 •− ), (O2 •− ) on the particles surface that strongly oxidize destroy of pathogens and on the other hand also degradates and mineralize of pesticides residues. AOPs technologies with uses friendly multi-oxide nanomaterials composites in oder to reduce the use and or replace amount of pesticides and antibiotics in the aquaculture, and agricultural farming are being intensively researched [5,6,13]. Most AOPs are based on the hydroxyl radical (•OH), superoxide radical (O2 •− ) generation, but in recent years methods based on the sulfate radical ion (SO4 •− ) when using photocatlytic actived-persulfate have gained popularity (In situ chemical oxidation (ISCO) process) [6][7][8][9][10].…”

“…When persulfates (peroxydisulfate PS, S2O8 2− ) or peroxymonosulfate (PMS, HSO5 -) is added to the reaction system with multi oxides as photocatalytic activator (Fig. 2b), more highly reactive free radicals of SO4 •− /•OH/O2 •− are produced, and the separation efficiency of the photogenerated carriers is enhanced compared to that without persulfates [5,12]; . In this study, we present results of preparation of new composite photocatalysts based on ternary oxides composite ZnO/MgO/TiO2 high synergistic effects to activate persulfate (PS) under sunlight, focus on the explore practical application potential of these photocatalyst materials to replace or reduce toxic residues of some pesticides that are being widely used in agriculture on postharvest agricultural products.…”