Two-dimensional MXene enabled carbon quantum dots@Ag with enhanced catalytic activity towards the reduction of p-nitrophenol

Abstract

CQD@Ag/MXene has an outstanding catalytic activity for the PNP reduction with high mass-normalized rate constant of 5700 s−1 g−1. It is mainly due to the high adsorption rate to PNP and the efficient promotion of forming H radicals.

Multifunctional Ti3C2Tx MXene/Silver Nanowire Membranes with Excellent Catalytic, Antifouling, and Antibacterial Properties for Nitrophenol-Containing Water Purification

“…In comparison to other noble metals, Ag has attracted much interest because of its lower cost and outstanding antibacterial property. Nevertheless, it is hard to achieve a catalytic effect as expected for single Ag as a catalyst because of its characteristic of easy aggregation and unfavorable hydrogen (H*) absorption ability …”

High-Symmetry Co/Ni Triazine Polycarboxylate Diverse Frameworks Constructed by Mx(COO)y Building Blocks: Characterization and Catalytic Performance Evaluation of p-Nitrophenol

“…p -Nitrophenol (PNP) is one of the most common pollutants in wastewater from the chemical industry. Its frequent use in industry not only tends to destroy the ecosystem but also poses a risks to human health. − Considering the great harm caused by PNP to environmental pollution and human health, researchers have used various catalysts to catalyze the reduction of PNP to p -aminophenol (PAP). − PAP is an important organic chemical raw material and pharmaceutical intermediate, which can be used to prepare a variety of chemical products and can be used as anesthesia and analgesia as well as antipyretic drugs. − At present, catalytic hydrogenation is the major method for the catalytic reduction of PNP. Among them, the use of noble-metal catalysts to catalyze PNP has been reported in many literature reports. − In 2016, Sun et al synthesized Au/ZnO@ZIF-8 nanocomposite, which exhibited high catalytic activity for the reduction of PNP .…”

ZIF-Derived Co/Zn Bimetallic Catalytic Membrane with Abundant CNTs for Highly Efficient Reduction of p-Nitrophenol

“…p -Nitrophenol (PNP), produced in the pharmaceutical, dye, pesticide, and plasticizer industries, is difficult to degrade under natural conditions, − which has significant toxic effects on human health. , At the same time, p -aminophenol (PAP), as the reduced product of PNP, is a nontoxic industrial material widely used in the pharmaceutical industry. − Therefore, the p -nitrophenol reduction by catalysis to p -aminophenol is of paramount importance . So far, a lot of powdered metal catalysts are designed and developed for the p -nitrophenol hydrogenation. − Although powdered catalysts have excellent catalytic properties, it is difficult to recover the powdered catalysts from the reaction system and achieve their reuse.…”

“…p-Nitrophenol (PNP), produced in the pharmaceutical, dye, pesticide, and plasticizer industries, is difficult to degrade under natural conditions, 1−3 which has significant toxic effects on human health. 4,5 At the same time, p-aminophenol (PAP), as the reduced product of PNP, is a nontoxic industrial material widely used in the pharmaceutical industry. 6−8 Therefore, the p-nitrophenol reduction by catalysis to p-aminophenol is of paramount importance.…”