Photoluminescence and Photo-Catalytic Activity of Synthesized Nanocrystals

Mansi Chitkara, Khanesh Kumar, Sanjeev Kumar and I S Sandhu 
Department of Applied Sciences, Chitkara University, Rajpura 140 401, Punjab, India

Karamjit Singh
Department of Physics, Punjabi University, Patiala 147 002, Punjab, India

Email: sanjeevkumar@chitkara.edu.in

Abstract: Intrinsic and extrinsic semiconductor nanostructures have attracted great attention due to their size tunable photo-physical and photo-chemical properties. In the present paper, polyvinyl pyrrolidone (PVP) capped Zn1-xEux S (0.00001≤x≤0.1) nanocrystals have been synthesized by means of a facile chemical synthesis method. Crystallography and morphology of synthesized materials have been deliberated using X-ray diffraction (XRD) and transmission electron microscope (TEM), respectively. Diffraction and electron micrograph studies reveal that the synthesized materials are zinc blende nanocrystals having average particle size ~3nm. Elemental and compositional analyses of the nanocrystals have been done using energy dispersive X-ray fluorescence (EDXRF) technique. Steady state photoluminescence spectra have been recorded for optical characterization of synthesized nanomaterials. Photocatalytic activity potential of synthesized nanomaterials under UV radiation exposure has been investigated using methylene blue (MB) dye as a test contaminant in aqueous media. Photo-physical and photo-chemical behaviour dependence on doping concentration has been described in detail. Moreover, the sophistication of competition between charge carrier recombination and charge carrier trapping followed by the competition between recombination of trapped carriers and interfacial charge transfer processes have been presented in a fantastic and elaborative way by comparative study of photoluminescence and photo-catalytic activity results.

DOI: 10.15415/jotitt.2013.11002

LINK: http://dspace.chitkara.edu.in/jspui/bitstream/1/33/6/11002_JOTITT_Sanjeev%20Kumar.pdf

Comments

Post a Comment

Popular posts from this blog

Manpower Planning, Scheduling and Tracking of a Construction Project Using Microsoft Project Software

Image
ABHISHEK SHARMA AND K.K. PATHAK  National Institute of Technical Teachers’ Training and Research, Bhopal (M.P.), India Email: abhishek08887@gmail.com Abstract: Many project suffers time and cost overruns due to improper planning, scheduling and execution works that results in several issues like delay in providing facilities, development, reduction in quality of construction and making the project more expensive. A little consideration shows that the time required to complete the project is inversely proportional to the supply of manpower. As the manpower is increased, the completion time of the project is decreased and on the other hand if the manpower is decreased, the completion time of the project is increased. The present study deals with the manpower planning, scheduling and tracking of “Construction of a Residential Block at Mahadev Parisar, Bhopal”, a six storied (G+6) building project whose construction is in progress at Shivaji Nagar, Bhopal, Madhya Pradesh. A c...
Read more

Analysis of Student’s Data using Rapid Miner

Image
SHEENA ANGRA, SACHIN AHUJA  Ph.D Scholar, Chitkara University, India Associate Director, CURIN, Chitkara University, India E-mail: sheena.angra@chitkara.edu.in, sachin.ahuja@chitkara.edu.in Abstract: Data mining offers a new advance to data analysis using techniques based on machine learning, together with the conventional methods collectively known as educational data mining (EDM). Educational Data Mining has turned up as an interesting and useful research area for finding methods to improve quality of education and to identify various patterns in educational settings. It is useful in extracting information of students, teachers, courses, administrators from educational institutes such as schools/ colleges/universities and helps to suggest interesting learning experiences to various stakeholders. This paper focuses on the applications of data mining in the field of education and implementation of three widely used data mining techniques using Rapid Miner on the data coll...
Read more

Review of Modeling and Simulation Technologies Application to Wind Turbines Drive Train

Image
M Sh saleh* , A A El-Betar, A M El-Assal  Mechanical Engineering Department, Benha Faculty of Engineering, Benha University AL Qalyubiya, Egypt *Email: Mohamed.saleh@bhit.bu.edu.eg Abstract: In this paper, a review of past and recent developments in the wind turbine drive train is being studied. The objective is to review some of the basic approaches of drive train configuration in wind turbines and to identify drive train models including the modeling and simulation results of these models. In recent years, considerable effort has been devoted to modeling, design, and control of wind turbine including drive train .The number of publications on computational strategies (multibody dynamics) are widely used for design and simulation of wind turbines components has been steadily increasing. Lists and reviews many contributes of design and simulation method are given in survey papers [1], [2]. DOI: 10.15415/jotitt.2014.22009 LINK:   http://dspace.chitkara.edu.in/jspui/b...
Read more