One-Step Synthesis of CdSe Quantum Dots by Using Hydrazine Hydrate Reduction of Selenium Dioxide

Abstract

Hydrazine hydrate was used as a novel reducing agent for the synthesis of water soluble and stable cadmium selenide (CdSe) quantum dots (QDs). The as-prepared CdSe quantum dots were investigated by X-ray powder diffraction, high-resolution transmission electron microscopy, photoluminescence, and UV-vis absorption spectroscopy analyses. The results show that the as-prepared CdSe QDs possess a cubic crystal structure and an average size of 2 nm. The effects of the pH of the original solution, thioglycollic acid (TGA)/Cd2+ molar ratio (nTGA/nCd2+), and the Cd/Se molar ratio on the luminescence properties of CdSe QDs were also systematically analysed.

Synthesis of Metal Chalcogenide Semiconductors by Thermal Decomposition of Organosulfur and Organoselenium Compounds

“…Although Se and SeO 2 are often used as the Se source to form CdSe quantum dots, its transformation to selenide often remains unclear [39] . Hydrazine, NaBH 4 , ascorbic acid, and mercaptopropionic acid are suggested to be reducing agents during CdSe synthesis [40–43] . In the same way, part of the present precursors might have worked as a reducing agent, which we keep beyond the scope of this study.…”

“… [39] Hydrazine, NaBH 4 , ascorbic acid, and mercaptopropionic acid are suggested to be reducing agents during CdSe synthesis. [ 40 , 41 , 42 , 43 ] In the same way, part of the present precursors might have worked as a reducing agent, which we keep beyond the scope of this study. Finally, organic residue coming from the melamine derivatives needs to be removed from the chalcogenides depending on their applications.…”

Gold-selenide quantum dots supported onto cesium ferrite nanocomposites for the efficient degradation of rhodamine B

“…Quantum dots (QDs) [ 8 , 9 ] have been attracted more attention of chemical researchers, may be due to their unique catalytic/photocatalytic capability in the chemical catalysis and the photocatalysis processes [ 10 , 11 , 12 , 13 ]. The QDs have been extensively applied in the fields of environmental treatment/water treatment, chemical industry, sensors, solar cells, electronics, optoelectronics devices, cosmetics, drug delivery systems, and biological processes [ 10 , 14 , 15 , 16 , 17 , 18 ]. There are many nanoparticles (NPs) such as CdSe, ZnSe, CuSe, AgSe, Se, Ag, Cu, Au, Zn, and other metallic QDs which are coupled with/or supported on the magnetic composites [ 19 , 20 ].…”

Pristine, Ni- and Zn-Doped CuSe Nanoparticles: An Antimicrobial, Antioxidant, and Cytotoxicity Study

“…This H 2 SeO 3 -containing solution is then combined with a solution containing a (Cu 2+ –PVP) complex. The mixture is then treated with hydrazine hydrate, which acts as a reducing agent and generates Se 2– ions . The (Cu 2+ –PVP) complexes rapidly react with the Se 2– ions to produce the CuSe nanoparticles.…”