Huilan Su

A simple, convenient, mild solvothermal route to nanocrystalline Cu3P and Ni2P

Abstract Sheet-like nanocrystalline Cu 3 P and spherical nanocrystalline Ni 2 P with hexagonal phases were successfully obtained under mild solvothermal conditions based on the reactions of CuCl 2 ·2H 2 O, NiCl 2 ·6H 2 O with elemental phosphorus in ammonia liquor systems. The phase, grain size, morphology and purity were determined by XRD, TEM and XPS, respectively. The ammonia system and active yellow phosphorus played important roles in the formation of nanocrystalline Cu 3 P and Ni 2 P. A possible mechanism is proposed.

A novel one-step solvothermal route to nanocrystalline CuSbS2 and Ag3SbS3

Abstract A novel solvothermal method has been successfully developed to prepare nanocrystalline CuSbS2 and Ag3SbS3 by the reactions between CuI and AgNO3 with SbCl3 and elemental sulfur in ethylenediamine at 140°C for 12 h, respectively. XRD, TEM and XPS examinations investigated the phase, grain size, morphology and purity of the products, respectively. Ethylenediamine played important roles in the formation of the ternary sulfides. A possible mechanism is proposed and expected to explain similar reactions.

A direct solvothermal route to nanocrystalline selenides at low temperature

Abstract A direct route has been developed to synthesize nanocrystalline transition-metal selenides via a mild solvothermal process based on the reactions between Se and metal halides MCl n (M = Ni, Co, Pb, Sn, Bi) in ethylenediamine at 80–160°C. X-ray diffraction (XRD), transmission electron spectroscopy (TEM), and X-ray photoelectron spectroscopy (XPS) characterized the products as being thin-plate NiSe 2 , CoSe, PbSe, Bi 2 Se 3 , and SnSe nanocrystallites. The formation mechanism was studied.

A simple, convenient, mild hydrothermal route to nanocrystalline CuSe and Ag2Se

Abstract A convenient hydrothermal method has been successfully developed to prepare nanocrystalline CuSe and Ag 2 Se, based on the reactions of CuCl 2 ·2H 2 O and AgNO 3 with elemental selenium in dilute aqueous ammonia systems, respectively. X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) examinations were carried out to determine the phase, grain size, morphology, and purity of the products. The aqueous ammonia system plays an important role in the formation of nanocrystalline CuSe and Ag 2 Se. A possible mechanism is proposed.

Solvothermal preparation of tin phosphide nanorods

Sn4P3 nanorods 20 × 400 nm were successfully synthesized through a solvothermal process based on a metathesis reaction between SnCl2 and Na3P at 120–140°C, using ethylenediamine as the solvent and template.

Solvothermal synthesis to NiE2 (E = Se, Te) nanorods at low temperature

Abstract NiE 2 (E = Se, Te) nanorods were directly synthesized through the reaction of NiCl 2 and selenium or tellurium in an autoclave at 160 ∼ 180°C for 10 ∼ 15 h, using ethylenediamine as a solvent. X-ray powder diffraction patterns and transmission electron microscope images show that the products are cubic NiSe 2 and hexagonal NiTe 2 phase, respectively, in the form of well-crystallized nanorods. A possible mechanism of the formation of NiE 2 nanorods in the solvothermal process is proposed. The solvent ethylenediamine plays an important role in the formation of NiE 2 nanorods.

Solvothermal route to CoTe2 nanorods

Abstract CoTe 2 nanorods with the diameter of 30nm and the length of more than 1.2μm were directly synthesized by the reaction of CoCl 2 ·6H 2 O and tellurium in an autoclave with ethylenediamine as solvent at 160°C for 10h. X-ray powder diffraction (XRD) patterns, X-ray photoelectron spectra (XPS) confirmed the as-prepared nanorods are orthorhombic CoTe 2 phase with the lattice parameters a = 5.314A, b = 6.320A and c = 3.882A.

Formation of Cu2−xSe(en)2 in a solvothermal process and conversion to nanocrystalline Cu2−xSe

Abstract A precursor to prepare nanocrystalline Cu 2−x Se was obtained in the solvothermal reaction of CuCl 2 ·2H 2 O with elemental selenium at 140°C for 10 h in ethylenediamine (en). Powder X-ray diffraction (XRD), infrared (IR) spectroscopy, thermal analyses (TGA-DTA), and inductively coupled plasma (ICP) analyses showed that the precursor could be a complex with the form Cu 2−x Se(en) 2 , which released the ligand ethylenediamine to obtain Cu 2−x Se crystals by pyrolysis or protonation. XRD, transition electron spectroscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were used to investigate the phase, size, morphology, and composition, respectively, of the final product. The analyses indicated that it was a pure nanocrystalline Cu 2−x Se with cubic structure.

Synthesis of the nanocrystalline α-LiFe5O8 in a solvothermal process

Abstract Nanocrystalline α-LiFe5O8 powders were directly synthesized by a reaction of FeCl2·4H2O and lithium in ethylenediamine (en) at 120°C for 5 h. X-ray powder diffraction (XRD) pattern, transmission electron microscope (TEM) and electronic diffraction (ED) pattern show that the products are single cubic α-LiFe5O8 phase and well crystallized with an average size of about 17 nm.