A novel and reusable multinanozyme system for sensitive and selective quantification of hydrogen peroxide and highly efficient degradation of organic dye

Introducing a green nanocatalytic process toward the synthesis of benzo[a]pyrano-[2,3-c]phenazines utilizing copper oxide quantum dot-modified core–shell magnetic mesoporous silica nanoparticles as high throughput and reusable nanocatalysts

“…42 Regarding the M-MSNs spectrum, the bands at 3416 cm À1 , 1096 cm À1 , 804 cm À1 , and 467 cm À1 are related to the -OH vibrations, Si-O-Si groups of silica, Si-O of Si-OH bonds stretching vibration and Si-OH © 2022 The Author(s). Published by the Royal Society of Chemistry bending in the structure of the as-prepared M-MSNs, in order 43 (Fig. 2b).…”

“… 41 Moreover, the main peak positioned at 587 cm −1 is contributed to the Fe–O vibration. 42 Regarding the M-MSNs spectrum, the bands at 3416 cm −1 , 1096 cm −1 , 804 cm −1 , and 467 cm −1 are related to the –OH vibrations, Si–O–Si groups of silica, Si–O of Si–OH bonds stretching vibration and Si–OH bending in the structure of the as-prepared M-MSNs, in order 43 ( Fig. 2b ).…”

Nanozymes: powerful catalytic materials for environmental pollutant detection and degradation

“…On the one hand, many materials with peroxidase-like catalytic features have been utilized to fabricate Fenton-like systems to degrade these dyes. 44,[198][199][200][201][202][203][204][205][206][207][208][209][210][211][212][213][214][215] For example, Lin's group presented a strategy to construct graphene-gold nanoparticles (graphene/Au-NPs) through a one-step hydrothermal procedure, which acted as an effective scavenger for dyes with the synergetic impact of degradation and adsorption. 200 When different contents of the graphene/ Au-NPs material and H 2 O 2 (300 mM) were introduced to 10 μg mL −1 dye solutions, the remained dye levels were assessed by recording the supernatant's absorbance after removing graphene/Au-NPs.…”

Recent advances in the applications of nanozymes for the efficient detection/removal of organic pollutants: a review

“…As mentioned above, when adding excess nanozyme to the reactive system, the catalytic reaction could not continuously proceed due to the surplus of catalytic active sites. 152 Moreover, using the same catalytic system, with an increase in the concentration of organic pollutant, the detection effects and removal efficiencies present an increasing trend in the appropriate ranges. However, when the reaction conditions are optimized, a further improvement in the detection effects and removal efficiencies would be difficult to achieve due to the stable catalytic rate.…”

“…118,124,144 Finally, in reactive systems for detection/removal of organic pollutants by nanozymes, other secondary factors such as type of organic pollutant, dosage of nanozyme catalyst and concentration of organic pollutant are discussed. 49,119,152 5.1. Main internal factors 5.1.1.…”