APTES-functionalized Fe 3 O 4 microspheres supported Cu atom-clusters with superior catalytic activity towards 4-nitrophenol reduction

Zhong, Yuanhong; Gu, Yan; Yu, Lin; Cheng, Gao; Yang, Xiaobo; Sun, Ming; He, Binbin

doi:10.1016/j.colsurfa.2018.03.015

Cited by 41 publications

(15 citation statements)

References 59 publications

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“…This validates that CuCF meshes with functional groups (both the amine and carboxyl group) would considerably enhance catalytic 4-NP reduction, possibly owing to higher affinities between 4-NP and these CuCF meshes. For further examining the competitiveness of CuCF meshes, CFNM and CFCM both exhibited much lower E a values than most of the noble metal catalysts [46][47][48][49][50][51][52], as well as other Cu/Co/Ni-containing catalysts [53][54][55][56][57], revealing the exceptional advantages of functionalized CuCF meshes.…”

Section: Activation Energy (E a ) Of 4-np Reduction By Cucf Meshesmentioning

confidence: 99%

Single-Step Synthesized Functionalized Copper Carboxylate Framework Meshes as Hierarchical Catalysts for Enhanced Reduction of Nitrogen-Containing Phenolic Contaminants

et al. 2022

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Nitrogen-containing phenolic contaminants (NCPCs) represent typical pollutants of industrial wastewaters. As catalytic reduction of NCPCs is a useful technique and Cu is an efficient metal catalyst, Cu-carboxylate frameworks (CuCF) are favorable materials. However, they are in powder form, making them difficult to use; thus, in this study, CuCF was grown on macroscale supports. Herein, we present a facile approach to develop such a CuCF composite by directly using a Cu mesh to grow CuCF on the mesh through a single-step electrochemical synthesis method, forming CuCF mesh (CFM). CFM could be further modified to afford CuCF mesh with amines (NH2) (CFNM), and CuCF mesh with carboxylates (COOH) (CFCM). These CuCF meshes are compared to investigate how their physical and chemical characteristics influenced their catalytic behaviors for reduction/hydrogenation of NPCPs, including nitrophenols (NPs) and dyes. Their nanostructures and surface properties influence their behaviors in catalytic reactions. In particular, CFCM appears to be the most efficient mesh for catalyzing 4-NP, with a much higher rate constant. CFCM also shows a significantly lower Ea (28.1 kJ/mol). CFCM is employed for many consecutive cycles, as well as convenient filtration-type 4-NP reduction. These CuCF meshes can also be employed for decolorization of methylene blue and methyl orange dyes via catalytic hydrogenation.

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Section: Activation Energy (E a ) Of 4-np Reduction By Cucf Meshesmentioning

confidence: 99%

Single-Step Synthesized Functionalized Copper Carboxylate Framework Meshes as Hierarchical Catalysts for Enhanced Reduction of Nitrogen-Containing Phenolic Contaminants

et al. 2022

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“…17,57,58 In hydrolysis, Au NPs with a high coverage and small particle size (27.2 nm) can provide plentiful active sites to accelerate the electron transfer of BH 4 − ions, leading to the generation of abundant activated hydrogen. 54 In hydrogenation, the nitro (-NO 2 ) group is reduced by the activated hydrogen to form the amine (-NH 2 ) group. 10,54 According to the XPS analysis (Fig.…”

Section: Reaction Chemistry and Engineering Papermentioning

confidence: 99%

“…54 In hydrogenation, the nitro (-NO 2 ) group is reduced by the activated hydrogen to form the amine (-NH 2 ) group. 10,54 According to the XPS analysis (Fig. 6d), the surface of the Au NPs loaded on the glass beads has ample hydroxyl (-OH) groups originating from the AYR extract.…”

Section: Reaction Chemistry and Engineering Papermentioning

confidence: 99%

Fabrication and catalytic application of a tandem reactor module using Au nanoparticle-coated glass beads as packing materials

Sun

Shan

et al. 2022

React. Chem. Eng.

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“…APTES played a crucial role as link‐bridge to preserve the copper self‐agglomeration and at the same time ameliorated the 4‐NP adsorption on the catalyst surface. [ 325 ]…”

Section: Applications Of Magnetic Nanocompositesmentioning

confidence: 99%

Magnetic Nanoparticle Composites: Synergistic Effects and Applications

2021

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Composite materials are made from two or more constituent materials with distinct physical or chemical properties that, when combined, produce a material with characteristics which are at least to some degree different from its individual components. Nanocomposite materials are composed of different materials of which at least one has nanoscale dimensions. Common types of nanocomposites consist of a combination of two different elements, with a nanoparticle that is linked to, or surrounded by, another organic or inorganic material, for example in a core‐shell or heterostructure configuration. A general family of nanoparticle composites concerns the coating of a nanoscale material by a polymer, SiO2 or carbon. Other materials, such as graphene or graphene oxide (GO), are used as supports forming composites when nanoscale materials are deposited onto them. In this Review we focus on magnetic nanocomposites, describing their synthetic methods, physical properties and applications. Several types of nanocomposites are presented, according to their composition, morphology or surface functionalization. Their applications are largely due to the synergistic effects that appear thanks to the co‐existence of two different materials and to their interface, resulting in properties often better than those of their single‐phase components. Applications discussed concern magnetically separable catalysts, water treatment, diagnostics‐sensing and biomedicine.

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APTES-functionalized Fe 3 O 4 microspheres supported Cu atom-clusters with superior catalytic activity towards 4-nitrophenol reduction

Cited by 41 publications

References 59 publications

Single-Step Synthesized Functionalized Copper Carboxylate Framework Meshes as Hierarchical Catalysts for Enhanced Reduction of Nitrogen-Containing Phenolic Contaminants

Single-Step Synthesized Functionalized Copper Carboxylate Framework Meshes as Hierarchical Catalysts for Enhanced Reduction of Nitrogen-Containing Phenolic Contaminants

Fabrication and catalytic application of a tandem reactor module using Au nanoparticle-coated glass beads as packing materials

Magnetic Nanoparticle Composites: Synergistic Effects and Applications

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