Congkang Xu

Preparation and characterization of CuO nanorods by thermal decomposition of CuC2O4 precursor

Synthesis of nickel oxide (NiO) nanorods was achieved by thermal decomposition of the precursor of NiC2O4 obtained via chemical reaction between Ni(CH3COO)2·2H2O and H2C2O4·2H2O in the presence of surfactant nonyl phenyl ether (9)/(5) (NP-9/5) and NaCl flux. Transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), selected area electron diffraction (SAED) and high-resolution transmission electron microscopy (HRTEM) were used to characterize the structure features and chemical compositions of the as-made nanorods. The results showed that the as-prepared nanorods is composed of NiO with diameter of 10–80 nm, and lengths ranging from 1 to 3 micrometers. The mechanism of formation of NiO nanorods is also discussed.

Synthesis of NiO nanorods by a novel simple precursor thermal decomposition approach

Single-crystal cubic NiO nanorods with diameters of 30–80 nm and lengths of up to tens of micrometers were synthesized by using a simple precursor thermal decomposition in NaCl flux with NiCO3 as the precursor, which was prepared by one-step, solid-state reaction of NiCl2·6H2O and Na2CO3 at ambient temperature. The crystallinity, purity, morphology, and structure features of the as prepared NiO nanorods were investigated by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), high-resolution transmission electron microscopy (HRTEM), and Raman spectrum.

Preparation and characterization of SnO2 nanorods by thermal decomposition of SnC2O4 precursor

Abstract Synthesis of tin oxide (SnO 2 ) nanorods was achieved by thermal decomposition of SnC 2 O 4 precursor. The nanorods were characterized by transmission electron microscopy, X-ray diffraction and so on. The results showed that the nanorods is composed of SnO 2 . The mechanism of formation of SnO 2 nanorods was also discussed.

Synthesis and Raman scattering study of rutile SnO2 nanowires

This article reports the synthesis and Raman scattering study of rutile SnO2 nanowires obtained by a simple precursor thermal decomposition process in NaCl flux with Sn(CO3)2 as the precursor. The SnO2 nanowires have lengths up to tens of micrometers and diameters in the range of 8–25 nm, with an average of 15 nm. In addition to the fundamental Raman scattering peaks, the other two Raman scattering peaks are also observed. We have discussed the possible reasons for the appearance of two Raman scattering peaks at 300 and 601 cm−1, but the origin of these two modes is not well understood.

Synthesis of CdS nanoparticles by a novel and simple one-step, solid-state reaction in the presence of a nonionic surfactant

A novel and simple one-step, solid-state reaction in the presence of a nonionic surfactant, C18H37O(CH2CH2O)10H (abbreviated as C18EO10), has been developed to synthesize uniform cubic-phase β-CdS nanoparticles with an average diameter of ca. 5 nm. The CdS nanoparticles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), UV–VIS optical absorption spectrum and X-ray photoelectron spectrum (XPS). The roles of nonionic surfactant, C18EO10, in the formation of CdS nanoparticles were discussed in detail.

Large-scale synthesis of rutile SnO2 nanorods

A high yield of tin oxide (SnO2) nanorods was obtained via annealing a nanoscale precursor in the molten salt flux and surfactant. X-ray diffraction, transmission electron microscopy, high-resolution transmission electron microscopy, selected area electron diffraction and infrared spectroscopy showed that the nanorods are composed of SnO2 with rutile structure. The surfactant and temperature have a profound influence on the production of SnO2 nanorods.

Growth and mechanism of titania nanowires

Abstract Anatase and rutile-phase titania nanowires have been prepared via an efficient molten salt-assisted and novel pyrolysis route, respectively. The growth of anatase nanowires is parallel to [010] direction. The anatase titanium oxide nanowires are obtained by exchange reaction between Na2TiO3 and HCl, whereas the formation of rutile titania nanowires is conventional vapor–liquid–solid growth mechanism.

Fabrication of CoO nanorods via thermal decomposition of CoC2O4 precursor

Abstract Cobalt oxide (CoO) nanorods were synthesized by annealing CoC 2 O 4 precursor. The nanorods were identified by Transmission electron microscopy (TEM), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and other methods. The results showed that the nanorods are composed of cubic CoO with diameter of 10–80 nm, and lengths ranging from 1 to 3 μm. The mechanism of formation of CoO nanorods was also discussed.

Preparation of SnO2 nanorods by annealing SnO2 powder in NaCl flux

SnO2 nanorods having the rutile structure have been prepared by annealing fine SnO2 powder in a NaCl flux. The starting SnO2 powder, the NaCl flux, and surfactant NP9 were mixed and heated at 800 °C for 2.5 h. The nanorods have diameters of ca. 20–40 nm and lengths of up to 1 μm. High-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED) and X-ray diffraction (XRD) showed that the nanorods were well-crystallized with a rutile structure. The structure features and chemical composition of the as-prepared nanorods were analyzed by XRD, TEM, HRTEM, SAED, EDS and FTIR. A possible growth mechanism of the nanorods was described by the studies of the formation of nanorods with comparative experiments. The effects of NaCl and NP9 are discussed in detail.

FABRICATION OF CO3O4 NANORODS BY CALCINATION OF PRECURSOR POWDERS PREPARED IN A NOVEL INVERSE MICROEMULSION

Co3O4 nanorods were prepared by improving traditional molten salt synthesis; the length and diameters of the Co3O4 nanorods were about 10 microns and 40-100 nm, respectively; the mechanism of formation of the Co3O4 nanorods is discussed.