A simple route for synthesis of SnO₂from copper alloy dross

Abstract

Separation/recovery of valuable metals such as zinc, nickel or tin from copper alloy dross has recently attracted from the viewpoints of environmental protection and resource recycling. In this study, preliminary investigation on separation of tin (Sn) from copper alloy dross using selective dissolution method was performed. The tin in the copper alloy dross did not dissolve in an aqueous nitric acid solution which could allow the concentration/separation of tin from the copper alloy dross. Precipitation of tin as H 2 SnO 3 (meta stannic acid)occurred in the solution and transformed to tin dioxide (SnO 2 ) after drying process. The dried sample was heat-treated at low temperature and its crystal structure, surface morphology and chemical composition were investigated.

Long-Term Oxidation Susceptibility in Ambient Air of the Semiconductor Kesterite Cu2ZnSnS4 Nanopowders Made by Mechanochemical Synthesis Method

“…In this regard, the crystalline Sn(SO 4 ) 2 and Sn 2 (SO 4 ) 3 were prepared and skillfully isolated from the reactions of tin oxide SnO with the concentrated sulfuric acid, oleum (65% SO 3 ), and B(OH) 3 to avoid the hydrolysis. The somewhat ambiguous water insoluble solid SnO 2 •xH 2 O, often called even nowadays the stannic/metastannic acid, has the x -value occasionally quoted as 1 to correspond with the formal stannic acid H 2 SnSO 3 , while the data from the scarce and often very mature literature references point out rather to the various hydrated forms of tin(IV) oxide SnO 2 •xH 2 O [ 39 , 40 ]. The important aspect of the hydrolysis-promoted formation of the colloidal hydrated tin(IV) oxide is its amorphous nature which renders the application of powder XRD of limited use for its detection.…”

Pulsed laser ablation of hydroxyapatite in ethanol

“…A various approaches have been introduced for the preparation of hydroxyapatite nanoparticles and their functionalization [5]. Conventionally, solid state reaction, acid-base, precipitation, hydrothermal and sol-gel methods were used for synthesis of hydroxyapatite powders or other nanoparticles [6,7]. However, those methods need long reaction time and several process steps for fabrication.…”