Novel Cu2O/Cu-MOF/rGO is reported as highly efficient catalyst for reduction of 4-nitrophenol

Copper-Based Integral Catalytic Impeller for the Rapid Catalytic Reduction of 4-Nitrophenol

“…At present, copper and its oxide catalysts have attracted wide interest as a promising substituent for expensive noble metal catalysts (Au, Ag, and Pd) to the catalytic reduction of 4-nitrophenol. A large number of copper-based catalysts with high catalytic activity have been developed, such as copper nanoparticles (Cu NPs), − Cu 2 O NPs, , CuO NPs, Cu@M (M = Au, Ag, and Pd), − Cu@Cu 2 O, Cu@C, Cu@MOF, , Cu@Polymer, Cu@Cu 2 O@CuO, and other composites. − These catalysts often involve complex preparation steps and have to be dispersed in solution to form a heterogeneous system. For the heterogeneous catalysis, due to the effect of intraparticle diffusion, the catalytic activity increases with the decrease in particle size, while the decrease in particle size also leads to the difficulty of separation and colossal energy consumption.…”

Synthesis of a Magnetic 2D Co@NC-600 Material by Designing a MOF Precursor for Efficient Catalytic Reduction of Water Pollutants

“…Among them, 4-NP is the most difficult organic pollutant to treat. − Conventional water purification treatment cannot effectively remove it because of it is highly water soluble. 4NP has a strong irritating effect on the skin, which can inhibit the central nervous system or damage liver and kidney functions on entering the body. − At present, a large number of physical and chemical methods are used to remove pollutants in wastewater, such as electrochemical degradation, photolysis, adsorption, and catalysis. − Reducing 4-NP to 4-AP is a good way to deal with the pollution because 4-AP is a precursor material for many industrial syntheses, such as picture developers used in the dye industry, corrosion inhibitors, and the manufacture of antipyretics and analgesics. − With the assistance of a catalyst, the reduction of 4-NP hydrogenation directly to 4-AP through NaBH 4 has received widespread attention. − Precious-metal catalysts which have excellent catalytic effects such as Au, Ag, and Pd have been widely reported for treating water pollutants, but they are extremely rare and expensive, which have limited their applications in real life. − In the catalytic reduction of 4-NP, the most important aspect is to find a non-precious-metal catalyst which has high activity and recyclability. Transition metals, for instance Fe, Co, and Ni, have been widely used in catalysis and many other fields in recent years due to their low price and good physicochemical properties. , However, the transition-metal particles can easily aggregate due to their high surface energy, which reduces their activity.…”

Copper-based MOF, Cu3(SDBA)2(HSDBA), as a catalyst for efficient reduction of 4-nitrophenol in the presence of sodium borohydride

“…This catalytic performance may be compared to some stateof-the-art MOF-based catalysts (Table 1). 24,[38][39][40][41] Under roughly similar conditions, Cu 3 (SDBA) 2 (HSDBA) is as efficient as Pd@Co-MOF 40 for reducing 4-NP in 20 seconds; however, our Cu 3 (SDBA) 2 (HSDBA) is free of a hydrogenation metal like Pd. It is difficult to further discuss the performance of the listed catalysts because of discrepancies in the reaction conditions, but it is reasonable to observe that Cu 3 (SDBA) 2 (HSDBA) is highly efficient in quickly reducing 4-NP at 25 °C.…”