Optically Enhanced SnO2/CdS Nanocomposites by Chemical Method and Their Characterization
SnO2/CdS heterostructures nanocomposites were synthesized using newly develop ultrasonic sol-gel method. Stannous chloride, cadmium chloride (CdCL2 · 2H2O) and thiourea were used as Sn, Cd and S precursors respectively and Ethylene glycol was used as a complexing agent. The samples were characterized by XRD, SEM, EDX, optical studies. All the XRD peaks are identified for SnO2 however a slight shift is observed with addition of CdS. EDX confirms the presence of Sn, Cd and S in the samples. AFM and SEM studies also confirm the nanofibers structures with roughness 2.9136 nm and conversion of hollow tubes into nanofibers. The UV–Vis spectrum of the nanostructures displays a new absorption band range lies in the range between 450–530 nm compared with the bare SnO2 hollow tubes. The strong emission peak is observed at 375 nm in UV region for all the samples and intensity of emission become weaker due to incorporation of CdS nanoparticles. Addition of CdS introduces effective charge separation in the heterostructures which controlled the intensity of photo luminescence makes them suitable for optoelectronic applications.
KeywordsScan Electron Micrographs Photo Luminescence Cadmium Chloride Stannous Chloride SnO2 Nanoparticles
The authors are thankful to MPCST and AICTE for funding this work. The authors are also thankful UGC-DAE consortium for scientific research Indore India for providing XRD and AFM facility and IIT Roorki for providing SEM and EDX facility.