Cu/Nb2O5, Fe/Nb2O5 and Cu-Fe/Nb2O5 applied in salicylic acid degradation: Parameters studies and photocatalytic activity. Issue 9 (29th July 2022)

• Record Type: Journal Article
• Authors: Fuziki, Maria E. K.; Abreu, Eduardo; Napoli, Jose S.; Nunes, Sabrina C.; Brackmann, Rodrigo; Machado, Tauani C. S.; Semianko, Betina C.; Lenzi, Giane G.
• Is Part Of: Journal of environmental science and health. Volume 57:Issue 9(2022)
• Page Start: 797
• Page End: 812
• Publication Date: 2022-07-29
• Subjects: Emergent pollutants -- Nb2O5 -- catalysts Fe-Cu -- advanced oxidation process -- micropollutant; Environmental engineering -- Periodicals; Environmental sciences -- Periodicals; Ecology -- periodicals; Hazardous Substances -- periodicals; 628
• DOI: 10.1080/10934529.2022.2117525
• Languages: English
• ISSNs: 1093-4529

Abstract

Abstract: This study describes the synthesis of Cu/Nb2 O5, Fe/Nb2 O5, and Cu-Fe/Nb2 O5 catalysts obtained by incorporating copper and/or iron metals into niobium pentoxide (Nb2 O5 ). The new materials were characterized by the following techniques: Thermogravimetric Analysis (TA), surface and pore analysis, X-ray diffractometry (XRD), and Fourier Transform Infrared Spectroscopy (FT-IR). The catalyst was applied in the photocatalytic degradation of salicylic acid (SA). The influence of different parameters (calcined temperature, pH, and metal addition) on the photocatalytic reaction was evaluated. The results indicated that catalysts containing copper were more active and pH influenced the SA degradation process. SA removal results indicated that Cu/Nb2 O5 photocatalyst presented a 1.5 fold higher degradation after 120 min in comparison to Cu-Fe/Nb2 O5 and 4.6 fold higher than Fe/Nb2 O5 catalyst, all them calcined at 400 °C. In tests carried out in the presence of formic acid, increasing the pH from about 3 to 7 allowed an almost 3.4-fold increase in SA degradation for the Cu-Fe/Nb2 O5 catalyst calcined at 400 °C.