Semiconductor zinc chalcogenides nanofibers from 1-D molecular precursors

Synthesis, conversion and comparison of the photocatalytic and electrochemical properties of ZnSe·N2H4 and ZnSe microrods

“…The peaks between 1111 and 873 cm -1 should be ascribed to the stretching vibration of N-N. These experimental results are in good agreement to the reports of Dong [20] and Chen [21]. In order to ascertain the proportion of N 2 H 4 in the complex, the TG analysis of ZnSe molecular precursors was investigated (see Fig.…”

“…The XRD pattern of the product fails to be identified among the JCPDS (Joint Committee on Powder Diffraction Standards) cards. However, it is very similar to that of ZnSe molecular precursors reported in references [20,21], indicating that the as-obtained product under the current experiment conditions should be a molecular precursor containing ZnSe.…”

“…In 2004, Dong et al [20] demonstrated that hydrazine hydrate could also play a structure-directing role in the preparation of semiconductors. When hydrazine hydrate was used in the system, 1D molecular precursor of ZnSe or ZnS could be obtained; and these 1D molecular precursors could be further decomposed into hightemperature-stable wurtzite ZnS and ZnSe nanofibers under relatively low temperature [20].…”

“…When hydrazine hydrate was used in the system, 1D molecular precursor of ZnSe or ZnS could be obtained; and these 1D molecular precursors could be further decomposed into hightemperature-stable wurtzite ZnS and ZnSe nanofibers under relatively low temperature [20]. Employing the similar method, Chen et al [21] obtained ZnSe nanowires with 10-100 nm in diameter and up to several micrometers in length through decomposition of ZnSe·0.5N 2 H 4 in Ar stream at 400°C for 1 h. However, to www.crt-journal.org date, the reported ZnSe molecular precursor was always ZnSe·0.5N 2 H 4 in literature.…”

Solvothermal production of CdS nanorods using polyvinylpyrrolidone as a template

“…Previously, nanocrystalline transition metal sulfides were solvothermally prepared from their corresponding metal salts and S powder in organic solvents: benzene, alcohol, hydrazine, and ethylenediamine (en). These sulfides were needle-like particles with an axis ratio of 10 for ZnS (wurtzite) from ZnCl 2 and S powder in en; spheres with an average size of 7 nm for ZnS (wurtzite) from ZnCl 2 and S powder in benzene; CdS from Cd(NO 3 ) 2 .4H 2 O or CdCl 2 .2.5H 2 O and S powder in en [10]; single crystals of wurtzite ZnS nanofibers from ZnCl 2 and S powder in hydrazine monohydrate [11] [12]. In the present research, 1D CdS nanorods were solvothermally produced using ethylenediamine as both a solvent and bidentate ligand, and polyvinylpyrrolidone as a capping agent to obtain products with large aspect ratios.…”