Nb2O5 nanoparticles decorated with magnetic ferrites for wastewater photocatalytic remediation

UV-Vis Spectrophotometry Coupled to Chemometric Analysis for the Evaluation of Atrazine Photolysis and Photocatalysis

“…In addition to photolytic studies, the literature broadly addresses heterogeneous photocatalysis for degradation of atrazine and other emerging contaminants (Chen et al 2018;Moreira et al 2018;Paris et al 2020). Thus, this study was expanded to evaluate the application of MCR-ALS in the analysis of the photocatalytic degradation of ATZ in the presence of TiO 2 .…”

“…As the conventional physicochemical/biological treatment processes are ine cient for ATZ degradation, studies that approach homogeneous/heterogeneous photocatalysis are widely found in the literature (Moreira et al 2017;He et al 2019a). Photocatalysts such as Nb 2 O 5 , ZnO, and especially TiO 2 are extensively investigated for the environmental remediation of ATZ and other emerging contaminants Loading [MathJax]/jax/output/CommonHTML/jax.js under different operating conditions (Samsudin et al 2016;Souza et al 2016;Truc et al 2019;Paris et al 2020). To obtain materials with optimized photocatalytic properties, different synthetic methods are employed leading to materials with different properties and catalytical activity (Mohseni-Salehi et al…”

“…The practical consequence of this approach, which disregards the by-products in uence on the degradation mechanism, is directly related to the degradation kinetics of the main contaminant. Different studies have already con rmed that the by-products act as competitors in the pollutant degradation mechanism and therefore, they must be considered in calculations of kinetic constant (k), which is a parameter widely used to conclude on the new technologies' e ciency of environmental remediation (Paris et al 2020;Malafatti et al 2020). In the case of ATZ, a search in the current literature clearly shows that the kinetic constants are calculated considering only the initial and nal concentrations of ATZ at different degradation times, while by-products, especially HAT, are completely ignored (Majhi et al 2020;Zhang et al 2021;Li et al 2021).…”

“…However, this approach, which considers by-products as important as the main contaminant, demands accessible and e cient analytical tools for quantitative monitoring. In this context, analytical techniques most used in ATZ photodegradation studies are chromatography and UV-Vis spectrophotometry (Parmar and Sharma 2016;Moreira et al 2017;Paris et al 2020), being chromatography the preferred one for the quanti cation of ATZ and its by-products (Chen et al 2018;Khavar et al 2018). However, chromatography presents important drawbacks such as signi cant organic solvents consumption and production of chemical residues, as well as a time-consuming execution and demand for skilled labor.…”

Nb2O5 nanoparticles obtained by microwave assisted combustion synthesis under different conditions

“…Niobium pentoxide (Nb 2 O 5 ) has got attention due to its excellent chemical and thermal stability, corrosion resistance and high catalytic activity [1][2][3]. The properties of niobium pentoxide allow its use in numerous technological applications, including photocatalysis [3], lithium-ion battery [4], paint additive [5] and humidity sensors [6]. However, these properties depend on its structure, morphology and particle size.…”