Carbon-Based Nanorod Catalysts for Nitrophenol Reduction

Abstract

Three-dimensional porous carbon-based materials from metal–organic frameworks (MOFs) have been proven useful in structural mechanical and catalytic applications due to the high specific surface area and excellent electron transport property. However, introducing and loading of metal catalytic sites on MOF-derived porous carbon-based materials always involves complex multistep synthetic processes and unwarrantable catalyst sites with high catalytic activity. Here, we have developed a facile Mo-doping-assisted strategy to construct a highly active nanorod with Ni-based catalyst nanoparticles from a MOF (MCF-61). Thanks to the assistance of Mo-doping to restrain the migration and aggregation of elemental Ni, the obtained Mo-doped Ni-based catalyst (MNC) exhibited excellent catalytic activity in the solution-phase hydrogenation of nitrophenols compared to those reported in other studies. Moreover, the role of molecular structures of nitrophenols on their reduction in MNC has been revealed by quantum chemical calculations. The unique structure, high catalytic activity, good cycle stability, and ease of separation individualize MNC with great potential in diverse applications.

Magnetically Separable Zn1‐xCu0.5xMg0.5xFe2O4 Ferrite: A Stable Catalyst for Reduction of 4‐Nitrophenol

“…The reduction of 4‐nitrophenol (4‐NP) in the presence of NaBH 4 was used as a model reaction to investigate the catalytic activity of Zn 1‐x Cu 0.5x Mg 0.5x Fe 2 O 4 ferrites. Carcinogenic 4‐NP is converted to 4‐aminophenol (4‐AP) as a useful intermediate in the synthesis of a variety of biologically active, antipyretic, and analgesic drug in this sample [28] . The optical absorption spectra of reduction of 4‐NP in the presence of Zn 0.25 Cu 0.375 Mg 0.375 Fe 2 O 4 ferrite are shown in Figure 6a.…”

“…Carcinogenic 4-NP is converted to 4-aminophenol (4-AP) as a useful intermediate in the synthesis of a variety of biologically active, antipyretic, and analgesic drug in this sample. [28] The optical absorption spectra of reduction of 4-NP in the presence of Zn 0.25 Cu 0.375 Mg 0.375 Fe 2 O 4 ferrite are shown in Figure 6a. The peak at 401 nm is due to the 4-nitrophenolate ion, which is generated in an alkaline environment by NaBH 4 .…”

A New Era of Metal–Organic Framework Nanomaterials and Applications

“…31 Molybdenum-doped MOFderived catalysts showed promising catalytic activity in the solution-phase reduction of nitrophenols. 32 Silver (Ag)-doped Co 3 O 4 micropolyhedra prepared by direct MOF pyrolysis showed enhanced catalytic CO oxidation activity, attributed to the unique interface between Ag and Co 3 O 4 . 33 CdS-decorated chromium-based MOFs exhibited a photocatalytic performance for the formation of imines with high production yields.…”

“…MOF-supported copper nanoparticles were employed as stable catalysts for selective acetylene semihydrogenation . Molybdenum-doped MOF-derived catalysts showed promising catalytic activity in the solution-phase reduction of nitrophenols . Silver (Ag)-doped Co 3 O 4 micropolyhedra prepared by direct MOF pyrolysis showed enhanced catalytic CO oxidation activity, attributed to the unique interface between Ag and Co 3 O 4 .…”

MIL-100(Fe) Metal–Organic Framework Nanospheres Embedded in Graphene Matrixes for Xanthine Fluorescence Sensing

“…However, the inherent low electrical conductivity and heavy agglomeration make it impossible for them to be excellent sensing materials. As a consequence, various MOF-based nanocomposites using different substrates including polymers, , alumina, oxides, and carbon-based materials − were explored. Among these, MOF/graphene oxide (GO) nanocomposites − are the most promising due to their synergic effects between the controlled porosity and selectivity of MOFs and the excellent conductivity of GO.…”