Preparation of Cu2S Nanoribbons from Cu(thiocarbamide)Cl·1/2H2O Complex Nanowires by Solid-state Reaction at Room Temperature without Surfactants

Abstract

Cu2S nanoribbons with width of 60–80 nm, length of 200–500 nm, and average thickness of about 8 nm were prepared by means of a simple solid-state reaction at room temperature without surfactants. The product was characterized by various techniques of XRD, XPS, TEM, HRTEM, and UV–vis spectra.

The Structure‐Controlling Solventless Synthesis and Optical Properties of Uniform Cu2S Nanodisks

“…Therefore, Δ E g × L y 2 should be a constant. The value of Δ E g × L y 2 calculated from Cu 2 S nanoribbons26 is 40.96 eV nm 2 . As shown in Figure 10, the absorption maximum at λ =274 nm and the absorption edge at λ =293 nm (curves c and d), give Δ E g =0.29 eV, and the average thickness is then calculated to be ≈12 nm, which is in good agreement with the thickness obtained from TEM observations.…”

“…22 The quantum size effect of nano Cu 2 S materials23 results in the tunable band gaps of these materials, which is desirable in photoelectric applications. Recently, Cu 2 S nanocrystals with different morphologies, such as wires,17, 24, 25 ribbons,26, 27 tubes,25 rods,14 disks, and plates,10, 13, 14 have been prepared by using different approaches, for example, solid, solution, hydrothermal, and solventless methods. The solventless method has shown advantages in producing uniform nanoproducts,14, 17 however, high yields from this method are impossible because of the extreme difficulty of separating Cu 2 S nanoproducts from the raw products (a mixture of several insoluble byproducts and unreacted reactants).…”

Growth Mechanism and Optical Properties Determination of CdS Nanostructures

“…It is well-known that in an alkaline medium S 2– ions are generated by hydrolysis of thiocarbamide The capping groups or surfactants play an important role in nanocrystals growth.…”

“…It is well-known that in an alkaline medium S 2À ions are generated by hydrolysis of thiocarbamide. 51 The capping groups or surfactants play an important role in nanocrystals growth. At high temperatures, the surfactant molecules are dynamically adsorbed to the surface of growing crystals, thereby stabilizing the particles in solution and mediating their growth.…”

Preparation, Conversion, and Comparison of the Photocatalytic and Electrochemical Properties of ZnS(en)0.5, ZnS, and ZnO

“…Transition metal complexes are a class of important compounds owing to their good catalytic properties in organic synthesis and some potential uses as sensitizers for photolysis of water . At the same time, they can be used as precursors for preparation of some semiconductors including ZnS, , ZnSe, ZnO, , CuS, and Cu 2 S via thermal decomposition, solvothermal or hydrothermal process, solid-state reaction, and so on. For example, X. Chen et al synthesized copper sulfide hollow spheres via a hydrothermal route utilizing a copper(II)−thiourea complex as the precursor.…”