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

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, CeO 2 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 CeO 2 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.

Femtomolar Detection of Spermidine Using Au Decorated SiO2 Nanohybrid on Plasmon-Coupled Extended Cavity Nanointerface: A Smartphone-Based Fluorescence Dequenching Approach

“…Point of care diagnostic studies have been reported with the use of mobile phone-based SPCE platform for picomolar sensing of Lipoprotein-Associated Phospholipase A 2 (LpPLA 2 ) coronary heart disease biomarker and realizing 10 nM limit of detection of tryptophan using CIE chromaticity diagram. These CIE coordinates have been extensively used for analysis and understanding of physicochemical, optical and thermal interactions in various systems involving (a) comparison of emission of tricomponent micelle cocktail before and after UV irradiation, (b) estimation of correlated color temperature (CCT) using photoluminescence (PL) emission spectra of as-formed and calcined samples, (c) detection of organic amines in vapors using bright red–light purple emission corresponding to basic–acidic environments, and (d) energy transfer caused by codoping of inorganic phosphors and resultant change in emission wavelengths . Moreover, CIE color space has been utilized for distinguishing spacer, cavity and extended cavity nanointerfaces in plasmon-coupled emission platforms as detailed in our earlier works. , In brief, according to the Commission Internationale de I’Eclairge 1931 color space, the color matching function of the human eye is defined by xyY values.…”

Synthesis and characterization of nanoceria for electrochemical sensing applications

“…This data conrmed that the surface conned species resulted in a redox peak current. 93 Nanoceria can neutralize free radical chemical species by undergoing redox changes (Ce 3+ 4 Ce 4+ ). Based on this characteristic, cyclic voltammetry (CV) and chronoamperometry responses of multi-valent nanoceria on the GCE in presence of H 2 O 2 was developed as an enzyme-free nanoceria-based sensor.…”

Hydrothermal fabrication and characterization of novel CeO2/PbWO4 nanocomposite for enhanced visible-light photocatalytic performance

“…Various traditional systems, such as electrochemical oxidation, membrane filtration, adsorption, chlorination, reverse osmosis, and photocatalysis, have been agreed to treat the harmful dyes covering wastewater. Amid these skills, semiconductors (SCs) based photocatalysis has drawn increasing interest because it offers a capable substitute strategy to eradicate the dye-containing wastewater since of its high efficacy, green reaction route and moderate reaction settings (Rohini et al 2017) for solving the recent severe problems of environmental pollution and energy shortages. Unfortunately, the utmost of these physical, chemical and biological systems could custom to secondary impurities simply through degradation manners (Venkatasubramanian et al 2008).…”