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RESEARCH PRODUCT

Phosphotungstic acid (PTA) in the synthesis of 3D CdS superstructures by diffusion assisted hydrothermal method

Mika SillanpääBahareh TanhaeiManu LahtinenFatemeh F. BamoharramAli Ayati

subject

electron microscopyChemistryPrecipitation (chemistry)Scanning electron microscopeGeneral Chemical EngineeringDiffusionmicrostructurediffusionInorganic chemistryNucleationsemiconductorsHydrothermal circulationCadmium sulfidechemistry.chemical_compoundChemical engineeringMechanics of MaterialsPhosphotungstic acidFourier transform infrared spectroscopyta215

description

Abstract In this study, the synthesis of cadmium sulfide (CdS) microstructures by gas diffusion assisted hydrothermal method using phosphotungstic acid (PTA) is reported. The as-synthesized products were characterized by Fourier transform infrared (FTIR), powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The effects of PTA dose, thioacetamide amount, time and temperature on the morphology of obtained particles have been studied. In this process, PTA ion host stabilizes the CdS particles against aggregation and thioacetamide plays two roles, being at the same time a sulfur source and a capping ligand. Based on the performed analyses it seems that the thioacetamide is more effective on the formation of CdS than PTA. The precipitation of CdS was mainly controlled by the diffusion rate of H 2 S gas. At high diffusion rate, the nucleation is dominant resulting in more uniform and smaller particles eventually assembling to the CdS microspheres.

yearjournalcountryeditionlanguage
2015-09-01Advanced Powder Technology
https://doi.org/10.1016/j.apt.2015.08.008