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DFNS is functionalized by using graphene oxide (GO) (N-enriched GO) as a robust anchor. Hence, the metal nanoparticles (NPs) are well-dispersed without aggregation over the DFNS/GO (DFNS/GO/X, X = Pd, Au, Cu). For preventing the restacking of graphene sheets, the supramolecular polymerized GO behaves not only as a spacer but also as a nitrogen source for producing active centers in the case of metal NP attachments. In this way, the nitrogen over the level of the GO sheets adjusts with copper ions in order to synthesis palladium nanoparticles. Water pollution is known as a significant global concern that can threat the entire biosphere and can influence the lives of many millions of people in the world. Water pollution can make many diseases and millions of people die annually due to illness caused by the dirty water. 4-nitrophenol and also 2-nitroaniline, which have been specified as hazardous toxic. In addition, wastes contaminants are in USEPA's list. Therefore, developing novel approaches are essential in order to eliminate these waste contaminants. In the case of the synthesize of colors and drugs, powerful performers o-phenylenediamine (o-PDA) and powerful performers were intended as considerable intermediate that preparation from 2-NA as well as 4-NP. As-prepared DFNS/GO/X (X = Pd, Au, Cu) nanostructures are used for the 4-nitrophenol and 2-nitroaniline reduction that causing high efficiency of the reaction by taking into account of chemoselectivity. [ABSTRACT FROM AUTHOR]

New N, N′ -substituted imidazolium salts and their corresponding diiodopyridinepalladium (II) complexes were successfully synthesized and supported on KCC-1 (KCC-1/Pd-NHC-Py) has been developed for synthesis of pyridopyrimidinones, providing excellent yields of the corresponding products with remarkable chemoselectivity. This morphology ultimately leads to higher catalytic activity for the KCC-1-supported nanoparticles. The KCC-1/Pd-NHC-Py NPs were thoroughly characterized by using TEM, FESEM, TGA, and BET. We supported a drug on the surface of a silica and used as a catalyst for synthesis another drug. [ABSTRACT FROM AUTHOR]

Abstract: This study investigates the potential application of an efficient, easily recoverable and reusable KCC-1 nanoparticle-supported Salen/Ru(II) catalyst in the synthesis of 2-oxazolidinones from CO2, and propargylic amines. The KCC-1/Salen/Ru(II) NPs were thoroughly characterized by using TEM, SEM, TGA, FT-IR, ICP-MS, and BET. This observation was exploited in the direct and selective chemical fixation of CO2, affording high degrees of CO2 capture and conversion. The recycled catalyst has been analyzed by ICP-MS showing only minor changes in the morphology after the reaction, thus confirming the robustness of the catalyst.Graphical Abstract: [ABSTRACT FROM AUTHOR]

The aim of this investigation is recycling, reusability and stability of the KCC-1 as a suport's catalyst. KCC-1 and its functionalized derivatives of aminopropyltriethoxysilane and tripolyphosphate (ATPP) have been synthesized, and applied to one-pot synthesis of 3-Acyloxylindolines for first time from 2-aminostyrene with carboxylic acid. [ABSTRACT FROM AUTHOR]

We have found that fibrous nanosilica (KCC-1) can used as a excellent support for the synthesis of highly sparse nanoparticles. KCC-1 has high surface area that was functionalized with 1,3-bis(dimethylthiocarbamoyloxy)benzene groups acting as the strong performers so that the Pd (II) was complex without aggregation on the fibers of the KCC-1 microspheres (KCC-1/BTB/Pd). For synthesis of 3-sulfenylindoles from aryl iodide, indoles, and thiourea used from the KCC-1/BTB/Pd NPs as a catalyst that showed excellent catalytic activities under green conditions. Compared with the traditional substrate, KCC-1/BTB/Pd substantially increases protection and the accessibility of the nanoparticle sites due to its three dimensional hierarchical structure. [ABSTRACT FROM AUTHOR]

• A new family of high surface area phosphosilicat nanosheet (FPS) with fibrous morphology was prepared. • [Ru(DMSO) 4 Cl 2 ] complex over triazole functionalized FPS. • FPS/Ligand/Ru was characterized and employed as photocatalytic for reduction of CO 2. • This system could be considered as perfect nanocatalyst by using the host–guest approach. In this work we report the design and synthesis of high-surface-area nanocatalysts by reaction between tripolyphosphate (TPP) and tetraethyl orthosilicate (TEOS) and then the complex ruthenium acetate anchored over the click modified ligand of fibrous phosphosilicate (FPS), forms a new highly efficient nano catalyst that shows excellent catalytic performance within CO 2 reduction to formate under visible-light irradiation. The FPS/Ligand/Ru nanocatalyst was thoroughly characterized by Fourier transform infrared spectra (FTIR), Powder X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM), Energy dispersive X-ray spectroscopy (EDX), and N 2 adsorption/desorption study. [ABSTRACT FROM AUTHOR]

Abstract Inspired by the high accessibility and low diffusion limitations of fibrous silica nanoparticles (KCC‐1), fibrous phosphosilicate (FPS) was engineered using a microemulsion system. In this work, we report design and synthesis of high-surface-area FPS using tripolyphosphate (TPP) and tetraethyl orthosilicate (TEOS). The FPS nanocatalyst was thoroughly characterized by Fourier transform infrared spectra (FTIR), Powder X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM), Energy dispersive X-ray spectroscopy (EDX), and N 2 adsorption/desorption study. Considering the large ionic internal character, high mechanical and thermal stability as well as long-term colloidal stability, this system could be considered as perfect nanocatalyst by using the host–guest approach. Then palladium nanoparticles (Pd NPs) supported on fibrous phosphosilicat to the cycloaddition of CO 2 to epoxides. Graphical abstract Image 1 Highlights • A new family of high surface area phosphosilicat nanosheet (FPS) with fibrous morphology was prepared. • Palladium nanoparticles (Pd NPs) supported on fibrous phosphosilicat. • FPS was characterized and employed as nanocatalyst to the cycloaddition of CO 2 to epoxides. • This system could be considered as perfect nanocatalyst by using the host–guest approach. [ABSTRACT FROM AUTHOR]

Herein, we report a chemoselective insertion of CO2 into unsaturated alkyne substrates under ambient conditions, which is achieved over poly (sulfobetain methacrylate) (p(SBMA)) supported Cu2O nanocatalyst (Cu2O/p(SBMA)) and a series of 3a,4-dihydronaphtho[2,3-c]furan-1(3H)-ones, can be obtained in excellent yields. Cu2O/p(SBMA) presents high performance for environment pressure activation and interpolation of CO2 into unsaturated alkyne substrates. This provides an attainable and competent catalyst for interpolation of CO2 into aryl alkynes, and binding allylic chlorides through SN2 mechanism in order to produce efficient ester and lactone heterocycles that are supposed to have favorable utilizations. All in all, these findings signify practical methods of hybrid catalyst development for detailed alterations, including CO2 employment in a green and sustainable manner. [ABSTRACT FROM AUTHOR]

Recently CO2 stabilization has received a great deal of attention because of its probable applications as a rich C1 resource and the synthesis of several fine chemicals can be accomplished through this stabilization. In this study, Sn(IV) doping dendritic fibrous nanosilica (SnD) supported PrVO4 nanoparticles as a catalyst (PrVO4/SnD) was synthesized by a in-situ procedure. The SnD with the ratios of Si/Sn in a variety of 6 to 40 were acquired through direct hydrothermal synthesis (DHS), and PrVO4 NPs on the surfaces of SnD were reduced in-situ. X-Ray diffraction (XRD), Scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and X-ray energy dispersive spectroscopy (EDS) were deployed for identifying the PrVO4/SnD. It is potentially a highly dynamic catalyst in the stabilization of CO2 for the production of 2-oxazolidinones and benzimidazoles. In addition, the catalyst is very easy to recycle and reuse without significant loss of active site Cu metal. PrVO4/SnD NPs as a nanocatalyst for carbon dioxide fixation to synthesis benzimidazoles and 2-oxazolidinones. [ABSTRACT FROM AUTHOR]

Abstract This study investigated the potential application of an efficient, easily recoverable, and reusable dendritic fibrous nanosilica (DFNS) magnetic nanoparticle catalyst, which supported cobaloxime complexes and corresponding to positively charged phosphonium linked cobaloximes (FeNi 3 /DFNS/Cobaloxime/PCPL MNPs) for catalytic reduction of 4-NP and 2-NA. FeNi 3 /DFNS/Cobaloxime/PCPL MNPs were thoroughly characterized by using TEM, FE-SEM, VSM, TGA, ICP-MS, and BET. Analysis of the recycled catalyst by ICP-MS showed only minor modifications in its morphology after the reaction and thus confirmed the strength of the catalyst. Graphical abstract Image 1 Highlights • The phosphonium linked cobaloximes attached onto the surface of FeNi 3 /DFNS. • FeNi 3 /DFNS/Cobaloxime/PCPL MNPs used for reduction of 4-NP and 2-NA of alkylphenols. • This system could be considered as perfect nanocatalyst by using the host–guest approach. [ABSTRACT FROM AUTHOR]

This study investigated the potential application of an efficient, easily recoverable, and reusable copper(II)-based catalyst bearing polyvinyl alcohol (PVA) immobilized on FeNi3/KCC-1/APTPOSS [FeNi3/KCC-1/APTPOSS/TCT/PVA/Cu(II)] magnetic nano-particles (MNPs) for the N-formylation of amines via CO2 hydrogenation. FeNi3/KCC-1/TCT/PVA/Cu(II) MNPs were thoroughly characterized by transmission electron microscopy, field emission-scanning electron microscopy, vibrating sample magnetometry, thermo-gravimetric analysis, inductively coupled plasma-mass spectrometry (ICP-MS), and the Brunauer, Emmett, and Teller method. After the reaction, only minor changes to the morphology of the catalyst recycled by the ICP-MS were evidenced, thus corroborating its robustness.Graphical Abstract: [ABSTRACT FROM AUTHOR]

[Display omitted] • The catalyst is made of a multi-walled carbon nanotube, imidazole, and keplerate nanosized polyoxomolybdate [Mo 368 ]. • CNTs-Ionic liquid@Mo 368 for the sustainable production of biodiesel. • High catalytic activity and ease of recovery from the reaction mixture by filtration. An echo-friendly surface modification technique was utilized to produce a suitable solid ionic liquid catalyst. The generation of green heterogeneous nanocatalysts with the biochemical synthesis of sunflower oil and methanol through the chemical modification method has many fans. The catalyst is made of a multi-walled carbon nanotube, imidazole, and keplerate nanosized polyoxomolybdate [Mo 368 ] (CNTs-Ionic liquid@Mo 368). It was effectively employed as a nanocatalyst for the biodiesel synthesis of absolute methanol and sunflower oil. The highest yield of Fatty Acid Methyl Ester (FAME) was obtained under ideal situations of 1:30 oil/methanol molar ratio and stirring speed of 500–600 rpm for 4 h. In addition, the CNTs-Ionic liquid@Mo 368 was reused for ten runs and the FAME efficiency was more than 98% each time. Therefore, it can be said that this substance is potentially applicable for the economic and green synthesis of biodiesel from cheap feed stocks. The results demonstrated that metabolic procedures in anaerobic bacteria could be mixed with eco-friendly chemical technologies to generate effective catalytic reactions for utilization in stable organic synthesis. [ABSTRACT FROM AUTHOR]