Preparation and Characterization of Netted Sphere-like CdS Nanostructures

Abstract

Netted sphere-like CdS nanostructures consisting of the dentritic nanolines were prepared in ethylenediamine using L-cysteine and cadmium nitrate tetrahydrate as precursors by a solvothermal process at 150 °C for 8 h. The reaction time, the molar ratio of precursors, solvent, and temperature can be used as the additional means to control the size and morphology. The synthesized product was characterized by X-ray powder diffraction (XRD), Fourier transform-infrared (FT-IR) spectroscopy, Field emission scanning electron microscopy (FESEM), Energy-dispersive X-ray fluorescence spectroscopy (EDXS), Transmission electron microscopy (TEM), High-resolution transmission electron microscopy (HRTEM), Electron diffraction (ED), Ultraviolet–visible (UV–vis) spectrometer, Raman spectroscopy, and Fluorescence spectrophotometer. And the possible formation mechanism of the netted sphere-like CdS nanostructures is proposed.

A Simple and Facile Solvothermal Synthesis of Hierarchical PbS Microstars with Multidendritic Arms and Their Optical Properties

“…Therefore, the S-C bond in diphenylthiocarbazone is easily ruptured during the solvothermal process, owing to high Journal of Nanoscience temperature and pressure, causing the formation of PbS nuclei. The adjacent EDA molecules are readily covered on the surface of newly generated PbS crystals which serve as building unit for the formation of hierarchical PbS microstars with multidendritic arms via highly epitaxial crystal growth [38][39][40][41]. This assumption is confirmed by the control experiments regarding the mixed solvents with various components and also agrees well with the growth of CdS nanorods in the literature [38,42].…”

“…The initial nucleation will minimize the system energy, while the subsequent crystal growth would strongly determine the final shapes of the crystals by controlling kinetic and/or thermodynamic parameters [14]. As known, EDA molecules contain two -NH 2 groups, which can coordinate with cations, and thereby facilitates the growth of the crystals with desired morphologies [1,38]. Meanwhile, EDA can influence the epitaxial growth, which can firstly incorporate into the inorganic skeleton and then escape to form crystals with desired shapes [38][39][40][41].…”

Controlled growth of flower-like SnS2 hierarchical structures with superior performance for lithium-ion battery applications

“…Growth mechanism L-cys molecule consists of several functional groups such as -COOH, -NH 2 , and -SH, which have a strong tendency to coordinate with inorganic cations and metals [22]. By mixing L-cys and Sn 4+ solution, Sn 4+ can interact with L-cys molecules to form precursor complexes.…”

“…With the breaking of the S-C bond in L-cys, S 2− ions would be released under high temperature and high pressure by hydrothermal heating [22]. In order to unveil the growth mechanism of the flower-like SnS 2 hierarchical structures (S5), structural dependence of the samples on growth time has been Fig.…”

Synthesis and optical properties of self-assembled flower-like CdS architectures by mixed solvothermal process

“…In the results, the intense peak is at 505 nm because of the near-band-edge emission of CdS, whereas a very low intensity broad peak centered at 670 nm is attributed to the structure defects, ionized vacancies, or impurities. Zhao et al reported the photoluminescence properties of netted sphere-like CdS nanostructures with a broad emission peak at 570 nm and a weak shoulder at 610 nm associated with the sulfur vacancies, extrinsic defects, or impurities [37]. Differences in optical properties have been researched widely, and the results indicate that they mainly come from different shapes, sizes and phase structures of the semiconductor nanocrystals.…”