A facile
method for the synthesis of Cu2O nanoparticles by reduction of Fehling's solution, using glucose as
reducing agent. Copper sulfate is used as a precursor with potassium sodium
tartarate in an alkaline media to produce Fehling's solution. The precipitation
of Cu2O nanoparticles from this solution
in the presence of glucose was controlled by addition of SLES or Triton-X 100
as surfactants. The reactions have been carried out at 60_C with high repeatability. The purification
process of the Cu2O product does
not require expensive methods, since a solid product isobtained from a reaction
in liquid phase.
Materials
- 1 CuSO4.5H2O,
- 2 Potassium sodium tartarate tetrahydrate,
- 3 Triton-X 100,
- 4 Sodium laureth sulfate
- 5 NaOH analytical grade
Preparation of Cu2O Nanoparticles
Fehling's
solution which is comprised of equal parts of the following solutions was first
made:
Solution 1: Was made by dissolving of copper (II) sulfate
pentahydrate (6.9 g 0.02 mol) in distilled water (100 mL).
Solution 2: Was made by dissolving of potassium sodium
tartarate tetrahydrate (34.6 g) and sodium hydroxide (12 g) in distilled water
(100 mL).
50 mL of
each of the above solutions were mixed together in a beaker and Triton X-100 or
SLES (2 g) was added to the mixture and vigorously stirred for 15 m. To this
mixture, aqueous solution containing 5 g of glucose in 50 mL water was added
and the whole content was then heated at 60° under continuous stirring. A
brick-red solid of Cu2O precipitated after a short period of reaction time. The
solid was filtered off, washed with deionized water (3 times) and ethanol (2
times) and it was dried in an oven at 80°C for 3 h to afford nanosized Cu2O, 1.38 g (97% yield based n the used copper
sulfate; each mole of copper sulfate produces 0.5 mole of Cu2O).
Tomado de :
Fabrication of Nanosized Cuprous Oxide Using Fehling's Solution
M. Kooti and L. Matouri
Transaction F: Nanotechnology
Vol. 17, No. 1, pp. 73-78
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