Bharathiar University

About: Bharathiar University is a education organization based out in Coimbatore, Tamil Nadu, India. It is known for research contribution in the topics: Thin film & Adsorption. The organization has 5812 authors who have published 8628 publications receiving 143934 citations. The organization is also known as: BU.

Enhanced larvicidal, antibacterial, and photocatalytic efficacy of TiO2 nanohybrids green synthesized using the aqueous leaf extract of Parthenium hysterophorus

Abstract: Titanium dioxide nanoparticles are emerging as a biocompatible nanomaterial with multipurpose bioactivities In this study, titanium dioxide (TiO2) nanoparticles were effectively synthesized using the aqueous leaf extracts of Parthenium hysterophorus prepared by microwave irradiation TiO2 nanoparticles were fabricated by treating the P hysterophorus leaf extracts with the TiO4 solution Biologically active compounds such as alcohols, phenols, alkanes, and fluoroalkanes were involved in bioreduction of TiO4 into TiO2 The formation of green-engineered TiO2 nanoparticles was confirmed by UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), and energy-dispersive X-ray (EDX) spectroscopy and further characterized by X-ray diffraction (XRD) studies UV-vis spectroscopy analysis showed maximum absorbance at 420 nm due to surface plasmon resonance of synthesized TiO2 NPs FTIR spectrum of the engineered TiO2 NPs showed the presence of bioactive compounds in the leaf extract, which acted as capping and reducing agents FESEM exhibited an average size of 20–50 nm and a spherical shape of TiO2 NPs EDX analysis indicated the presence of TiO2 NPs by observing the peaks of titanium ions XRD results pointed out the crystalline nature of engineered TiO2 NPs The larvicidal activity of TiO2 NPs was studied on fourth instar larvae of dengue, Zika virus, and filariasis mosquito vectors Aedes aegypti and Culex quinquefasciatus Antimicrobial efficacy of TiO2 NPs was assessed on clinically isolated pathogens Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumoniae, Proteus vulgaris, and Staphylococcus epidermidis Besides, we found that TiO2 NPs are able to quickly degrade the industrially harmful pigments methylene blue, methyl orange, crystal violet, and alizarin red dyes under sunlight illumination Overall, this novel, simple, and eco-friendly approach can be of interest for the control of vector-borne diseases, as well as to formulate new bactericidal agents and to efficiently degrade dye solutions in the polluted areas

Fluorination-Enhanced Ambient Stability and Electronic Tolerance of Black Phosphorus Quantum Dots.

Abstract: The environmental instability and uneliminable electronic trap states in black phosphorus quantum dots (BPQDs) limit the optoelectronics and related applications of BPQDs. Here, fluorinated BPQDs (F-BPQDs) are successfully synthesized by using a facile electrochemical exfoliation and synchronous fluorination method. The F-BPQDs exhibit robust ambient stability and limited fluorination capability, showing a nonstoichiometric fluorination degree (DF) maximum of ≈0.68. Density functional theory calculations confirm that due to the edge etching effect of fluorine adatoms, the simulated F-BPQDs become structurally unstable when DF surpasses the limit. Furthermore, the trap states of BPQDs can be effectively eliminated via fluorination to obtain a coordination number of 3 or 5 for fluorinated and unfluorinated phosphorus atoms. The results reveal that the air-stable F-BPQDs exhibit fluorine defect-enhanced electronic tolerance, which is crucial for nanophotonics and nanoelectronics applications.

Above ground biomass production and nutrient distribution in growing bamboo (Bambusa bambos (L.) Voss).

Abstract: Above ground biomass production and nutrient distribution in growing Bamboo (Bambusa bambos (L.) Voss) from two days old (0.12 m height) to maturity (28.5 m height) were studied over five months. The average daily increase in height was 30 cm and independent of rain. There was a linear increase in the total above ground biomass for all components with the percentage contribution of culm maximum followed by branches, and leaves. Culm recruitment was monsoon dependent. The percentage distribution of N, P, K, Ca and Mg between components varied. Biomass equations were derived to estimate the green weight of the whole bamboo culm, the weights of the branches, leaves, and rhizomes and the relationships between the oven dry weights of various tree components as dependent variables and diameter (D), height (H), diameter and height (DH), square of diameter and height (D2H), square of diameter (D2), basal area (B), basal area diameter and height (BH) were determined. Of these, diameter and height (DH) was found to be most closely correlated with total above ground biomass. This was therefore used for the prediction of total biomass.