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Fibrous nanosilica (KCC-1) as a catalyst support was investigated in terms of stability, recycling, and reusability. For the first time, CO2 transformation was performed via the synthesis and application of KCC-1 together with sodium tripolyphosphate (STPP) and 3-aminopropyltriethoxysilane (APTES) as its functionalized derivative. To this goal, KCC-1/STPP NPs were applied to act as a nanocatalyst with excellent catalytic activities under green reaction conditions. [ABSTRACT FROM AUTHOR]

We have found that fibrous nanosilica (KCC‐1) can used as a excellent support for the synthesis of highly sparse nanoparticles and has high surface area that was functionalized with Tetrathia‐azacyclopentadecane (TTACP) groups acting as the strong performers so that the Ag nanoparticles were well‐dispersed without aggregation on the fibers of the KCC‐1 microspheres (KCC‐1/TTACP/Ag). We enthusiasm to report one‐pot synthesis of 3‐Acyloxylindolines for first time from N‐tosyl‐2‐vinylaniline, and benzoic acid in the presence of KCC‐1/TTACP/Ag as a catalyst. [ABSTRACT FROM AUTHOR]

Novel heterogeneous catalyst systems comprised of a fibrous nanosilica-supported nano-Ni@Pd-based ionic liquid (KCC-1/IL/Ni@Pd) are described for the cyclization of propargylic amines with CO2 to provide 2-oxazolidinones. KCC-1 with high surface area was functionalized with IL acting as a robust anchor so that the nano-Ni@Pd was well dispersed on the fibres of the KCC-1 microspheres, without aggregation. Because of the amplification effect of IL, high loading capacities of the nanocatalysts were achieved. The reported synthesis includes several advantages like solvent-free conditions, operational simplicity, short reaction times, environmentally benign reaction conditions, cost effectiveness, high atom economy and excellent yields, making it a genuinely green protocol. [ABSTRACT FROM AUTHOR]

The current study reports the synthesis of multi-site ionic liquids immobilized on DFNS (DFNS-IL) in an aqueous medium. Hence, the ruthenium nanoparticles (NPs) are well-dispersed over the DFNS-IL (DFNS-IL@Ru). Its catalytic function for hydroformylation of alkenes using CO2/H2 as a syngas surrogate is described here under mild conditions. Resultants with good to excellent performance were created employing DFNS-IL@Ru nanocatalyst. The structure of the catalyst was specified by a variety of techniques, including FT-IR, XRD, SEM, TGA, AFM, XPS, TEM, and EDX. The stability of the catalytic system was enhanced after releasing a large quantity of DFNS. The recycling state of the catalyst and the procedure of the coupling reactions were repeatedly investigated. [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]

An abstract of the article "Quinuclidine Stabilized on FeNi3 Nanoparticles as Catalysts for Efficient, Green, and One-Pot Synthesis of Triazolo[1,2-a]indazole-triones," by S. M. Sadeghzadeh is presented.

Simultaneously fabricating a fibrous structure and phase junction has the potential to improve the separation of nano titanium oxide, catalytic activity, and catalytic power. It is important to maintain an easy and environmentally-friendly fabrication process. This research led to the successful creation of a sophisticated type of titanium oxide, featuring a TiO2/anatase phase interface and a significant unique outer layer. A unique exterior level was created using an eco-friendly method and modification of deep tunable solvents. This resulted in a 3D structure made of 2D ultrathin nanosheets with mesopores. We synthesized Dy2Sn2O7 nanoparticles and combined them with aromatic ring-doped C3N4 nanosheets (Ar-C3N4; Ar = Ph, Pm, Py,) which were deposited onto nanofibrous titanium (Dy2Sn2O7@Ar-C3N4/NFT) as a nanoceramic. The employment of NFT was discovered to supply numerous hydroxyl groups, enabling consistent loading of Ar-C3N4 via molecular binding engagement. By exploring the potential of fibrous structure in nanoceramic production, a novel and innovative approach is being pursued, which has the potential to revolutionize the field of catalysis in the petroleum industry. Moreover, Ar-C3N4 could adjust fibre sizes and offer active amino group adsorption sites, aiding in chemisorption with organic compounds. The surface features and porous architecture of the Dy2Sn2O7@Ar-C3N4/NFT composite were preserved after Dy2Sn2O7@Ar-C3N4 loading, suggesting the maintained crystalline form. This remarkable catalyst, displays an impressive capability in facilitating the desulfurization process, all while adhering to environmentally friendly conditions. Moreover, in order to further enhance its sustainability credentials, this catalyst has been crafted with the support of oxygen green oxidant, ensuring a greener approach to the desulfurization process. Remarkably, this entire process is carried out at atmospheric pressure and at low temperatures, ensuring energy conservation and minimizing any potential adverse effects.Graphical Abstract: Simultaneously fabricating a fibrous structure and phase junction has the potential to improve the separation of nano titanium oxide, catalytic activity, and catalytic power. It is important to maintain an easy and environmentally-friendly fabrication process. This research led to the successful creation of a sophisticated type of titanium oxide, featuring a TiO2/anatase phase interface and a significant unique outer layer. A unique exterior level was created using an eco-friendly method and modification of deep tunable solvents. This resulted in a 3D structure made of 2D ultrathin nanosheets with mesopores. We synthesized Dy2Sn2O7 nanoparticles and combined them with aromatic ring-doped C3N4 nanosheets (Ar-C3N4; Ar = Ph, Pm, Py,) which were deposited onto nanofibrous titanium (Dy2Sn2O7@Ar-C3N4/NFT) as a nanoceramic. The employment of NFT was discovered to supply numerous hydroxyl groups, enabling consistent loading of Ar-C3N4 via molecular binding engagement. By exploring the potential of fibrous structure in nanoceramic production, a novel and innovative approach is being pursued, which has the potential to revolutionize the field of catalysis in the petroleum industry. Moreover, Ar-C3N4 could adjust fibre sizes and offer active amino group adsorption sites, aiding in chemisorption with organic compounds. The surface features and porous architecture of the Dy2Sn2O7@Ar-C3N4/NFT composite were preserved after Dy2Sn2O7@Ar-C3N4 loading, suggesting the maintained crystalline form. This remarkable catalyst, displays an impressive capability in facilitating the desulfurization process, all while adhering to environmentally friendly conditions. Moreover, in order to further enhance its sustainability credentials, this catalyst has been crafted with the support of oxygen green oxidant, ensuring a greener approach to the desulfurization process. Remarkably, this entire process is carried out at atmospheric pressure and at low temperatures, ensuring energy conservation and minimizing any potential adverse effects. [ABSTRACT FROM AUTHOR]

In this paper, we have produced carboxylic acids by the oxidation of various alcohols in the presence of CO2 using SBA-15/IL supported Cu(II) (SBA-15/IL/Cu(II)) as nanocatalyst. The obtained products showed to have excellent yields by taking into account of SBA-15/IL/Cu(II) nanocatalyst. In addition, the analysis of EDX, SEM, TGA, TEM, XPS, and FT-IR showed the heterogeneous structure of SBA-15/IL/Cu (II) catalyst. It is determined that, after using SBA-15 excess, the catalytic stability of the system was enhanced. Moreover, hot filtration provided a full vision in the heterogeneous catalyst nature. The recycling as well as reuse of the catalyst were studied in cases of coupling reactions many times. Moreover, we have studied the mechanism of the coupling reactions. [ABSTRACT FROM AUTHOR]

TEMPO or Anchoring 2,2,6,6-tetra-methylpiperidine-1oxyl radical into the nanospaces a fibre of phosphosilicate with laccase compound causes an unheard potent to be producing which called bifunctional nanocatalyst (TEMPO@FPS-laccase). TEMPO@FPS-laccase indicated proper catalytic activity for synthesis of β-oxopropylcarbamates in aqueous medium without any pollutants through a multi component coupling of CO2, amines and propargyl alcohols in moderate condition. Free laccases may not be recovered but can be easily disabled in different environmental conditions. Enzyme immobilization is known as an expanding way to enhance resistor to extreme conditions and stability as well as recycled of laccase. [ABSTRACT FROM AUTHOR]