Synthesis, structural and photocatalytic studies
of Mn-doped CdS nanoparticles
Ram Pal Chaudhary
Received: 7 March 2012 / Accepted: 30 April 2012 / Published online: 13 May 2012
Ó Springer Science+Business Media B.V. 2012
Abstract Mn-doped CdS nanoparticles (Cd
S; where x = 0.00–0.10) were
synthesized by a chemical precipitation method. The synthesized products were
characterized by X-ray diffraction (XRD), scanning electron microscope, trans-
mission electron microscope (TEM), and UV–Vis spectrometer. The XRD and TEM
measurements show that the size of crystallites is in the range of 10–40 nm. Optical
measurements indicated a red shift in the absorption band edge upon Mn doping.
The direct allowed band gaps of undoped and Mn-doped CdS nanoparticles
measured by UV–Vis spectrometer were 2.3 and 2.4 eV at 400 °C, respectively.
Photocatalytic activities of CdS and Mn-doped CdS were evaluated by irradiating
the solution to ultraviolet light and taking methyl orange (MO) as organic dye.
It was found that 5 mol% Mn-doped CdS bleaches MO much faster than undoped
CdS upon its exposure to the ultraviolet light. The experiment demonstrated that the
photo-degradation efﬁciency of 5 mol% Mn-doped CdS was signiﬁcantly higher
than that of undoped CdS.
Keywords Nanoparticles Á X-ray diffraction Á UV–Vis spectrometer Á
Scanning electron microscope Á Transmission electron microscope Á Photocatalysis
R. Chauhan Á R. P. Chaudhary
Department of Chemistry, Sant Longowal Institute of Engineering & Technology,
Longowal 148 106, India
Technology Education and Research Integrated Institutions, Kurukshetra 136 119, India
A. Kumar (&)
Department of Physics, National Institute of Technology, Kurukshetra 136 119, India
Res Chem Intermed (2013) 39:645–657