scispace - formally typeset
Search or ask a question
Journal ArticleDOI

Synthesis of calcium silicate nanoparticles and its catalytic application in Friedlander reaction

16 Feb 2017-Inorganic and Nano-Metal Chemistry (Taylor & Francis)-Vol. 47, Iss: 6, pp 946-949
TL;DR: In this article, the nitric acid catalysed synthesis of wollastonite (CaSiO3) nanoparticles (NP) from tetraethyl orthosilicate and calcium nitrate tetrahydrate.
Abstract: This work describes the nitric acid catalysed synthesis of wollastonite (CaSiO3) nanoparticles (NP) from tetraethyl orthosilicate and calcium nitrate tetrahydrate. The formed calcium silicate nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), Powder X-ray Diffraction (PXRD), and scanning electron microscopy (SEM) equipped with X-ray micro analysis. The CaSiO3 NPs showed an excellent yield (93%) towards the synthesis of quinolines via Friedlander reaction. The synthesized compound 3-dimethyl-7-nitro-9-phenyl-3,4-dihydroacridin-1(2H)-one was characterized by various spectroscopic techniques.
Citations
More filters
Journal ArticleDOI
TL;DR: This review will highlight some of the most recent—and sometimes unexpected—advances in this exciting and diverse field of research and development.
Abstract: During the last couple of decades, the rapidly advancing field of nanotechnology has produced a wide palette of nanomaterials, most of which are considered as “synthetic” and, among the wider public, are often met with a certain suspicion. Despite the technological sophistication behind many of these materials, “nano” does not always equate with “artificial”. Indeed, nature itself is an excellent nanotechnologist. It provides us with a range of fine particles, from inorganic ash, soot, sulfur and mineral particles found in the air or in wells, to sulfur and selenium nanoparticles produced by many bacteria and yeasts. These nanomaterials are entirely natural, and, not surprisingly, there is a growing interest in the development of natural nanoproducts, for instance in the emerging fields of phyto- and phyco-nanotechnology. This review will highlight some of the most recent—and sometimes unexpected—advances in this exciting and diverse field of research and development. Naturally occurring nanomaterials, artificially produced nanomaterials of natural products as well as naturally occurring or produced nanomaterials of natural products all show their own, particular chemical and physical properties, biological activities and promise for applications, especially in the fields of medicine, nutrition, cosmetics and agriculture. In the future, such natural nanoparticles will not only stimulate research and add a greener outlook to a traditionally high-tech field, they will also provide solutions—pardon—suspensions for a range of problems. Here, we may anticipate specific biogenic factories, valuable new materials based on waste, the effective removal of contaminants as part of nano-bioremediation, and the conversion of poorly soluble substances and materials to biologically available forms for practical uses.

139 citations


Cites background from "Synthesis of calcium silicate nanop..."

  • ...Silicate SiO4 drug carrier and catalytic applications [24,25]...

    [...]

Journal ArticleDOI
TL;DR: The quinoline moiety is a privileged scaffold because of the wide spectrum of its biological activities as discussed by the authors, and the Friedlander annulation is a well-known procedure for the synthesis.

12 citations

Journal ArticleDOI
TL;DR: In this paper, a magnetically recyclable nanocatalyst for the preparation of quinolines and 1,8-dioxo-octahydroxanthenes under mild reaction conditions was proposed.
Abstract: A new, cheap, and accessible method has been used for the preparation of nano-belts from the chemical decomposition (top-down approach) of a cheap stainless steel screw and found as an efficient magnetically recyclable nanocatalyst for the preparation of quinolines and 1,8-dioxo-octahydroxanthenes under mild reaction conditions. The nano-belts, Fe–Cr–Ni oxide alloy, was prepared in a two-step synthesis and characterized with various instrumental methods. Due to magnetic property of the screw (a ferritic-alloy), the resultant nano-belts is magnetic. Magnetic Fe–Cr–Ni alloy nano-belts were applied toward efficient preparation of quinolines and 1,8-dioxo-octahydroxanthenes under mild conditions. The catalyst could be readily recovered and recycled for several consecutive runs, while it suffers from a very low metal leaching and subsequently efficiency drop.

8 citations

Proceedings ArticleDOI
27 Jun 2019
TL;DR: In this paper, a 50:50 mixing ratio of CaO:SiO2 optimally with combination aging and drying process at 110°C was used to synthesize a calcium silicate phase.
Abstract: The calcium silicate powder were prepared by sol-gel methods-varying the synthesis conditions (mixing ratio, temperature and aging period). The precursors of sol-gel procedures were calcium nitrate tetrahydrate and tetraethyl orthosilicate. Nitric acid and water were applied as catalyst. The crystalline structures of calcium silicate product have been varied from amorphous to crystalline phases depending strongly on the preparation conditions. The structures and chemical composition were investigated in atomic range with X-ray diffraction and X-ray fluorescence, respectively. Calcium silicate phase synthesized by using 50:50 mixing ratio of CaO:SiO2 optimally with combination aging and drying process at 110°C.

3 citations

References
More filters
Journal ArticleDOI
TL;DR: The results showed that effect of time was directly related to synthesized nanoparticles and functional groups has a critical role in reducing the metal ions and stabilizing the palladium nanoparticles in an eco-friendly process.

165 citations

Journal ArticleDOI
TL;DR: The zinc alkoxy(siloxy) complex {Zn[OSi(OtBu)3]2}2 has been prepared and studied as a molecular precursor to zinc orthosilicate, Zn2SiO4·SiO2 as discussed by the authors.
Abstract: The zinc alkoxy(siloxy) complex {Zn[OSi(OtBu)3]2}2 has been prepared and studied as a molecular precursor to zinc orthosilicate, Zn2SiO4. This complex, prepared by reaction of ZnMe2 with HOSi(OtBu)3, has been characterized by X-ray crystallography as a dimer with two four-coordinate zinc centers. It cleanly looses isobutene, tert-butyl alcohol, and HOSi(OtBu)3 at ca. 100 °C to produce Zn2SiO4·SiO2. Reaction of ZnMe2 with (HO)2Si(OtBu)2 affords the hydrocarbon-soluble polymer [ZnOSi(OtBu)2O]n, which is proposed to have a structure consisting of four-coordinate Zn atoms linked by bridging −O(tBuO)Si(OtBu)O− groups. This polymer undergoes a very clean ceramic conversion over 150−250 °C to give the theoretical yield of carbon-free (by infrared spectroscopy and combustion analyses) Zn2SiO4·SiO2. The pyrolytic elimination products consist of water, tert-butyl alcohol, and isobutene. X-ray diffraction studies on the ceramic products show that Zn2SiO4 is the only zinc-containing, crystalline product formed. Thus ...

114 citations


"Synthesis of calcium silicate nanop..." refers methods in this paper

  • ...Recently, the novel techniques such as spray pyrolysis sol–gel, hydrothermal,([7]) polymer pyrolysis,([8]) etc....

    [...]

Journal ArticleDOI
TL;DR: In this article, the variations of sol viscosity with time and film thickness with the number of layers were investigated in Zn2SiO4: Mn system, and the results of XRD and IR showed that the Zn 2SiO 4: Mn films remained amorphous below 700°C and crystallized completely around 1000°C.

113 citations

Journal ArticleDOI
TL;DR: In this paper, the luminescence properties of Tb 3+ and Eu 3+ doped Zn 2 SiO 4 phosphors were analyzed by measuring the excitation, photoluminescence spectra and lifetimes of the emission transitions.

97 citations

Journal ArticleDOI
TL;DR: In this article, Mn-doped willemite (Zn 2 SiO 4 :Mn) is synthesized in an aqueous medium at as low temperature as 250°C.

81 citations