2.1 Materials
All chemicals used in this experiment
were of analytical grade and used
without further purification.
2.1.1 Preparation of
Mn0.05Cd0.95S
The Mn0.05Cd0.95S solid solutions were
synthesized according to the previous report
[33].
In
a typical process, manganese acetate tetrahydrate (0.44 g), cadmium
acetate anhydrous (1.919 g) and thioacetamide (2.5 g) were added into 20
mL of ethylenediamine and 40 mL
deionized
water and dispersed by sonication for 20 min. After stirring for 1.5 h,
the mixture solution was transferred into a Teflon-lined autoclave (80
mL), the autoclave was maintained at 160 oC for 24 h.
After cooling naturelly, the yellow sediment was centrifuged and washed
by deionized water and absolute ethyl alcohol respectively and then
dried at 60 oC for 10 h to get the
Mn0.05Cd0.95S composite which named as
MCS.