Fabricated CeO2 nanopowders as a novel sensing platform for advanced forensic, electrochemical and photocatalytic applications

B S Rohini,R Sudarmani,G P Darshan,S C Sharma,H Nagabhushana,R B Basavaraj

doi:10.1007/s13204-017-0611-x

B S Rohini, R Sudarmani + Show 4 more

Open Access

https://doi.org/10.1007/s13204-017-0611-x

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Abstract

In Forensic investigation, identification of various types of ridge details are essential in order to fix the criminals associated in various crimes. Even though several methods and labeling agents are available to visualize latent finger prints (LFPs) there is still simple, accurate, cost-effective, and non-destructive tool is required. In the present work, CeO2 nanopowders (NPs) are prepared via simple solution combustion route using Tamarindus indica fruit extract as a fuel. The optimized NPs are utilized for visualization of LFPs on various surfaces by powder dusting method. Results revealed that visualized LFPs exhibit Level 3 features such as pores and ridge contours under normal light with high sensitivity and without background hindrance. The photometric characteristics of the prepared samples exhibit blue color emission and highly useful in warm light emitting diodes. The photocatalytic studies were carried out with different Methylene blue (MB) dye concentration and pH values. The obtained results reveal that the CeO2 NPs exhibits an excellent catalytic properties which can act as a good catalytic reagent. The findings demonstrate that the prepared NPs are quite useful as a labeling agent for visualization of LFPs, efficient catalysts for dye degradation as well as solid-state lighting applications.

Highlights

Fingerprints (FPs) have provided a vital source of forensic evidence for human identification and individualization
The findings demonstrate that the prepared NPs are quite useful as a labeling agent for visualization of latent finger prints (LFPs), efficient catalysts for dye degradation as well as solid-state lighting applications
In order to inspect its suitability for recognizing latent fingerprints (LFPs), optimized CeO2 NPs were stained on the LFPs developed on various non-porous substrates, namely stainless steel, glass, mobile screen and aluminium foil

Summary

Introduction

Fingerprints (FPs) have provided a vital source of forensic evidence for human identification and individualization. CeO2 nanopowders (NPs) are prepared via simple solution combustion route using Tamarindus indica fruit extract as a fuel.

Results

Conclusion