Abstract:
This thesis is divided into two parts. The first part (A) is related to synthesis,
characterization and photocatalytic activity for the degradation of industrial wastes. As
energy and environment are two major issues of the modern world, they need to be
addressed on priority basis. Photocatalysis is the one of the most promising strategies to
solve above mentioned issues. The applications of photocatalysis in pollutant degradation
CO2 reduction, hydrogen production can cater both these challenges. In the reported
work, we have successfully synthesized carbon dots modified cobalt telluride
photocatalyst for the UV- visible degradation of diazo dyes i.e. Congo red. However, the
better results were observed in case of CoTe composite photocatalyst, which might be
attributed to efficient separation of the photogenerated charge carriers. Part B is related to
Development of Ablative Elastomeric Materials based on low density EPDM. Thermal
protection System (TPS) is an integral part of aerospace and defense industry so it
demands continuous development to build certain material that have desirable properties
to work under high temperature. In solid rocket motors, insulation acts as a barrier
between the outer case and propellant. The basic purpose of an insulating material is to
provide a shield to the outer case to retain its integrity at such a high temperature. The
basic aim of this work is to develop an understanding of the entire process take place in
building solid rocket insulation. The second aim is to present a model based on
elastomeric insulation having different types of fillers and to check the effect of these
fillers on different properties i.e. physical, mechanical and ablative properties so that it
can be used for working under high temperature of about 3000°C