Graphene oxide decorated ZnWO4 architecture synthesis, characterization and photocatalytic activity evaluation

Synthesis, characterization and photocatalytic performance of iron molybdate (Fe2(MoO4)3) for the degradation of endosulfan pesticide

“…Under basic condition, the · OH decreased; hence the PCA was also decreased. Moreover, the decomposition of H 2 O 2 into O 2 and H 2 O is accelerated under alkaline condition instead of • OH generation [43]. Also, at pH<3.0, hydrogen peroxide converted in to a stable oxonium ion (e.g., H 3 O 2…”

“…The irradiation time necessary to achieve complete mineralization tends to increase with the pollutant concentration. Moreover, a higher concentration of the pollutant may saturate the active sites on photocatalyst surface and reduce the photonic efficiency leading to photocatalyst deactivation [43]. Apparently, this was the case with the endosulfan mineralization, and results showed that higher endosulfan concentration require longer reaction period (at a given catalyst dose) for achieving sufficient mineralization.…”

“…AOPs degrade the pollutants by generating highly reactive oxidizing specie ( • OH) at ambient conditions. However, band gap of semiconductor is important regarding excitation using UV or solar light and materials bearing small band gap are active under visible light, which is of paramount importance in photocatalysis for destruction of organic pollutants [43,44]. Hetrostructcured metal oxides constituting molybdates, tungstate and vanadates are important families that exhibit narrow band gap for harvesting solar light for catalysis.…”

Facile synthesis of zero valent iron and photocatalytic application for the degradation of dyes

“…For reduction process, e − and H 2 are produced and reduced the targeted species. For oxidative degradation of dye, · OH radicals are required and under oxic conditions, Fe generates H 2 O 2 , which resultantly gererates · OH radicals, which destruct the organic pollutant oxidative in aqeous media [24][25][26][27]. The coagulation took place through iron oxides/hydroxides.…”

Synthesis of immobilized ZnO over polyurethane and photocatalytic activity evaluation for the degradation of azo dye under UV and solar light irardiation

“…These aforementioned methods have some drawbacks i.e., toxic compounds are not completely removed by these methods, but only trapped and transferred to another phase from water, thus create secondary contamination and disposal problems [18][19][20][21]. However advanced oxidation process is an eco-friendly and more efficient than the other existing technologies, during advanced oxidation process (AOP), the pollutants are degraded in to less toxic components rather than just being transferred to another phase [22][23][24][25][26][27].…”