Changes in the catalytic activity of oxygen-doped graphitic carbon nitride for the repeated degradation of oxytetracycline

Mechanism insight into the facet-dependent photoaging of polystyrene microplastics on hematite in freshwater

“…The formation of ROS on different facets of hematite was determined by electron paramagnetic resonance (EPR) spectroscopy (Bruker EMXplus, Germany) using 5,5-dimethyl-1-pyrroline N-oxide (DMPO; 50 mM) to capture •OH and •O 2 – and 2,2,6,6-Tetramethyl-4-piperidone (TEMP; 50 mM) to capture 1 O 2 ( Nguyen et al., 2022 ). The instrumental parameters were set as follows: center field = 3510 G; microwave frequency = 9.854 GHz; microwave power = 20 mW.…”

Transport of Oxygen-Doped Graphitic Carbon Nitride in Saturated Sand: Effects of Concentration, Grain Size, and Ionic Strength

“…Both gCN and OgCN are good photocatalysts [18][19][20][21]. However, OgCN demonstrates effective PMS activation, an effect that is negligiblein gCN [18,19].…”

“…Both gCN and OgCN are good photocatalysts [18][19][20][21]. However, OgCN demonstrates effective PMS activation, an effect that is negligiblein gCN [18,19]. It was suggested that the electron-rich O and the electron-poor C atoms near the O accelerated the electron transfer from organic pollutants (electron donor) to PMS (electron acceptor), and the generation of reactive species, such as SO 2…”

“…•− and 1 O 2 , eventually enhanced the oxidative degradation of the organic pollutants [14,18,19]. For example, OgCN was excellent in the degradation of bisphenol-A (BPA) and oxytetracycline via PMS activation to generate • OH, SO 2…”

“…•− , and 1 O 2 [18,19]. Moreover, OgCN is also an efficient photocatalyst for BPA degradation via improved charge-carriers separation and changing the positions of valance and conduction bands [20,21].…”