Fabrication of poly (N-vinylcaprolactam-co-acrylic acid)-silver nanoparticles composite microgel with substantial potential of hydrogen peroxide sensing and catalyzing the reduction of water pollutants

Preparation of stimuli responsive microgel with silver nanoparticles for biosensing and catalytic reduction of water pollutants

“…BMG exhibited a broad peak in the range of 14-26°2q values indicating its amorphous nature. 18,34 On the other hand, AgNPs-MG showed crystalline nature due to the AgNPs embedded within the microgel network. The diffraction peaks obtained at 38°, 44°, 64°and 77°correspond to miller indices (111), ( 200), ( 220) and (311) respectively which are characteristic for AgNPs with the face-centered cubic geometry.…”

“…The diffraction peaks obtained at 38°, 44°, 64°and 77°correspond to miller indices (111), ( 200), ( 220) and (311) respectively which are characteristic for AgNPs with the face-centered cubic geometry. 18 TGA analysis was done to investigate the thermal properties of the BMG and AgNPs-MG. TGA proles of BMG and AgNPs-MG in the temperature range of 0 to 800 °C are shown in Fig. 2.…”

“…AgNPs are oxidized upon interaction with H 2 O 2 . The conversion of Ag to Ag + ions is responsible for the lowering of typical absorption peak of AgNPs-MG. 18 Therefore, synthesized AgNPs-MG was tested as chemical sensor for H 2 O 2 . As expected, a decrease in the absorption intensity at wavelength corresponding to SPR of AgNPs was observed upon the interaction of AgNPs-MG with H 2 O 2 as shown in Fig.…”

“…15 These microgels fabricated with suitable metal nanoparticles can be used as catalysts for the degradation/ reduction of many water pollutants. Among the various metal nanoparticles, AgNPs have been focused by many scientists owing to their low and multiple properties including antibacterial, 16 catalytic, 17,18 optical sensing, 19 chemical sensing, 20 etc. The catalytic and optical properties of AgNPs can be tuned if they are embedded in the microgel network.…”

“…It has been reported that H 2 O 2 can be detected with AgNPs in terms of change in intensity of absorbance at the maximum absorption wavelength of AgNPs. 18,30 So, AgNPs have potential for the colorimetric detection of H 2 O 2 . However, stability of AgNPs without affecting its sensing ability has been a great challenge.…”