Mussel-inspired Ag/poly(norepinephrine)/MnO2 heterogeneous nanocatalyst for efficient reduction of 4-nitrophenol and 4-nitroaniline: an alternative approach

Abstract

Noble metal-based surface chemistry is a well-practiced domain on interest in catalysis. A newborn in mussel-inspired coating based on catecholic chemistry, poly(norepinephrine) (PNE), has been synthesized via cyclization polymerization technique over MnO 2 nanosheets. The physisorped PNE macromolecular chains over MnO 2 nanosheets act as green reducing agent for silver ions resulting in arresting the quasi-spherical silver nanoparticles distributed over the MnO 2-PNE assembly. The catalytic activity was performed against nitroaryl molecules which evidenced fast reduction with pseudo-first-order kinetics. The superiority which lies in this work is their facile preparation, high surface area due to sheet-like morphology, and fast catalytic reduction. These practical observations spread its window as nanocatalyst toward environmental remediation of hazardous nitroaryl compounds.

Mussel-Inspired Polynorepinephrine/MXene-Based Magnetic Nanohybrid for Electromagnetic Interference Shielding in X-Band and Strain-Sensing Performance

“…Recently, surface engineering by catecholamine-based materials has become daunting research as they can modify the surface under facile conditions compared to other adopted techniques reported elsewhere . Among them, mussel secret adhesive proteins, viz., dopamine and norepinephrine, have drawn great attention to the material scientists .…”

“…35 Recently, surface engineering by catecholamine-based materials has become daunting research as they can modify the surface under facile conditions compared to other adopted techniques reported elsewhere. 36 Among them, mussel secret adhesive proteins, viz., dopamine and norepinephrine, have drawn great attention to the material scientists. 37 The key benefit of the mussel secret adhesive is that these biocompatible materials can undergo in situ oxidative polymerization under normal atmospheric conditions and showed surface-independent material chemistry.…”

Polyvinylpyrrolidone Assisted Preparation of Highly Conductive, Antioxidation, and Durable Nanofiber Composite with an Extremely High Electromagnetic Interference Shielding Effectiveness

“…The diffraction peaks with the 2θ of 38.2°, 44.3°, 64.5°, and 77.4° correspond to [111], [200], [220], and [311] crystal faces of sliver (JCPDS No. 04-0783), indicating that the crystal structure of Ag nanoparticles is face-centered cubic (fcc) . However, the characteristic peaks were not present in the STAP membrane, which indicates the Ag precursor rather than AgNPs is uniformly coated on the surface of the nanofibers under the assistance of PVP.…”

“…21 Furthermore, the PVP that can be considered as a surfactant further promotes the Ag + adsorption. 22 23 indicating that the crystal structure of Ag nanoparticles is face-centered cubic (fcc). 24 However, the characteristic peaks were not present in the STAP membrane, which indicates the Ag precursor rather than AgNPs is uniformly coated on the surface of the nanofibers under the assistance of PVP.…”

Recent developments in polynorepinephrine: an innovative material for bioinspired coatings and colloids

“…Formed compounds stabilize silver nanoparticles, preventing their aggregation and boosting the adhesiveness of nanoparticles to the surface in solution. 43…”