Designing degradable lignin-grafted magnetic nano-composite materials for cost-effectively sustainable removal of fluoroquinolone antibiotics from environmental water

Design of a novel green bio-based organic–inorganic hybrid material for cost-effective and sustainable monitoring of antibiotic residues

“…The disparity in weight loss between SiO 2 @PVA/HA and SiO 2 @PVA can be attributed to the thermal degradation of organic matter, suggesting that the introduction of HA with high benzene rings and carbonyl structure favours the increase of organic matter in SiO 2 @PVA/HA. 65 The results were consistent with elemental analysis. Furthermore, the PVA and HA content of the composite was calculated from the TG data and the PVA and HA loadings were approximately 14.6% and 3.9%, respectively.…”

“…So, the presence of a π-π EDA interaction between the phenyl and carbonyl groups in SiO 2 @PVA/HA and MACs is indicated. 65 According to the XPS full spectra and N 1s spectra (Fig. 9f and S6b †), a new binding energy peak (-C-N) was observed at 399.1 eV, indicating that the successful absorption of SPI onto SiO 2 @PVA/HA.…”

“…This suggests that the presence of hydrogen bonds is significant in the adsorption process of SPI. 65 Furthermore, there is a shift and reduction in the intensity of the stretching vibration peaks associated with the CvO bond in both aldehyde and ketone groups. So, the presence of a π-π EDA interaction between the phenyl and carbonyl groups in SiO 2 @PVA/HA and MACs is indicated.…”