Synthesis of uniform MgO/CNT nanorods by precipitation method

Abstract

Due to distinguishing characteristics of nanoparticles (NPs) in terms of size, shape, chemical composition, transmittal and different applications, nanotechnology is considered as an interesting domain of research. Application of metallic NPs is important because of the diminution of dimensions and thus the unique thermal, optical and electronic properties. This research attempts to explore the synthesis of zinc oxide NPs. Zinc oxide NPs have been synthesized using cherry extract under different pH, temperature and concentration and then optimum conditions for the synthesis of them were determined. For further investigations, UV-Vis spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier infrared transformation spectroscopy (FTIR) were used. The solution containing zinc oxide NPs showed a major absorbance of 378 nm which confirmed the synthesis of zinc oxide NPs, and spherical morphology of NPs was observed in SEM images. Zinc oxide NP sizes were 6.5 and 20.18 nm which are obtained by UV-Vis spectra and XRD spectrum, respectively. Also, based on the FTIR spectra of the extract obtained before and after the synthesis, the existence of the reducing agents in herbal extract was confirmed. According to this study, the biological synthesis of NPs using plant extracts can be considered as a cost-effective and efficient method of biological synthesis of NPs and it could be an appropriate replacement to typical chemical methods for the synthesis of NPs.

Synthesis, characterization, and application of nickel oxide/CNT nanocomposites to remove Pb2+ from aqueous solution

“…One of the main challenges encountered when CNTs are used as the support material for nanoparticle synthesis is the hydrophobicity of their surface. In this regard, surface functionalization of CNTs for the generation of covalent bonds and further attachment of oxide nanoparticles seems to be of great significance [17][18][19]. The functionalization of CNTs is commonly performed using the chemical oxidation process introducing functional groups such as -COOH, C-O, C=O, and -OH on the surface of CNTs; such groups act as active surface sites for metal attachment [20,21].…”

Influence of carbon nanotubes support on the morphology of Fe3O4 nanoparticles

“…1b-f), the 2h = 25.9°, 42.9°as related to reflex of geraphen planes of carbon nanotubes in (002) and (100) direction, respectively (Taleshi and Hosseini 2012). Investigation of the sample spectra of Fig.…”

“…The first problem is spinning and the varied diffusion rate of the nanotube in the composite. The second is the suitable non-adhesion of the carbon nanotube surface with synthesized nanoparticles, which is due to a strong covalent bond between the considered nanoparticle and the white carbon nanotubes (Taleshi and Hosseini 2012). As a result, the nanotubes surface activation makes a suitable reaction between their surfaces, and with the nanoparticle, which is necessity (Taleshi and Hosseini 2012;Wang et al 2010).…”

“…As a result, the nanotubes surface activation makes a suitable reaction between their surfaces, and with the nanoparticle, which is necessity (Taleshi and Hosseini 2012;Wang et al 2010). The CNTs activation of the surface is typically performed by a chemical oxidation process and produces the formation of various functional groups such as COOH, C-O, C=O and OH (Taleshi and Hosseini 2012;Wang et al 2010). These chemical bonds could act as sites for nucleation of nanoparticle.…”

“…The second is the suitable non-adhesion of the carbon nanotube surface with synthesized nanoparticles, which is due to a strong covalent bond between the considered nanoparticle and the white carbon nanotubes (Taleshi and Hosseini 2012). As a result, the nanotubes surface activation makes a suitable reaction between their surfaces, and with the nanoparticle, which is necessity (Taleshi and Hosseini 2012;Wang et al 2010). The CNTs activation of the surface is typically performed by a chemical oxidation process and produces the formation of various functional groups such as COOH, C-O, C=O and OH (Taleshi and Hosseini 2012;Wang et al 2010).…”