Nanocomposites have been investigated by different research groups in various parts of the world due to the development of new material “architectures” at the nanoscale [1

Nanocomposites have been investigated by different research
groups in various parts of the world due to the development
of new material “architectures” at the nanoscale 1, 2. In the
periodic table, the transition metals are large in number and
have number of applications in different field. Some transition
metal oxides like ZnO, TiO2,
SnO2,
CuO, NiO, WO3
CeO2
and Fe3O4
proved as potential candidates for so many
applications. Semiconductor materials have been particularly
interesting because of their great practical importance
in electronic and optoelectronic devices, such as electrochemical
cell 3, gas sensors 4, magnetic storage devices
5, field emitters 6, high-Tc superconductors 7, nano
fluid 8 and catalysts 9 etc. Even though enormous metal
oxides are available, only limited number of them is most
useful in science and technology. Physico-chemical properties
of special relevance in chemistry are mostly related to
the industrial use of oxides as sensors, ceramics, adsorbents
and catalysts.
Numerous studies have been reported on the photocatalytic
degradation of organic compounds using semiconductor
particles as photocatalysts 10–15. Semiconductors
as catalysts have acquired great attraction for their potential
degradation capacity in the presence of light energy.
Among the numerous metal oxides, tin oxide (
SnO2) is a
wide bandgap (3.6 eV) n-type semiconductor which receives
great attention in the field of gas sensors, solar cells, light
emission and lithium-ion batteries 15, etc. Substitution
of impurities is an effective way to change in physical and
chemical properties of the core material. In the same way
CuO is also one of the useful metal oxides and which has
so many applications in different fields. The unique property
of CuO is it acts as a semiconductor. CuO is a distinct
p-type metal oxide semiconductor with bandgap of 1.2 eV
and SnO2/
CuO nanocomposite is synthesized for the many
applications including photocatalysis and electrochemical
studies 16, 17. These are known as inexpensive, nontoxic
and very effective semiconductor photocatalysts 13–15.