One step hydrothermal synthesis of novel Cu2S-MoO3 nanocomposite for lithium ion battery and photocatalytic applications

Novel Cu₂S-MoO₃ nanocomposite (NC) has been synthesized successfully by single step hydrothermal method. The crystal structure, morphology and optical properties of Cu₂S-MoO₃ NC were individualised by XRD, FTIR, SEM, TEM, UV–Visible spectroscopy. As synthesized Cu₂S-MoO₃ NC was used as anode material for lithium ion battery (LIB) and manifested first discharge capacity 1516 mAhg^?1 at C/4 current rate. Cu₂S-MoO₃ NC is also implemented for photocatalytic hydrogen generation. In addition to above applications, it is materialized for degradation of organic dye (methylene blue) and chromium reduction [Cr(VI) to Cr(III)] with peerless activity.     

Correlation-based interferometric method of evaluating the beat length

A new, to our knowledge, interferometric method of measuring beatlengths in polarization-maintaining fibers that is based on correlationmeasurements is presented.     

Comparison of the Microstructures and Mechanical Properties in the Overlapping Region of Low Carbon Steel Additive Bead Fabricated by WAAM and FSP

Metallurgical and Materials Transactions A - The periodic structural characteristics of the grains in the overlapping region of the WAAM deposited additive bead translate into spatially dependent...     

Photocatalytic generation of hydrogen over mesoporous CdS nanoparticle: Effect of particle size, noble metal and support

Mesoporous CdS nanoparticles with an average pore size of 54 Å and a particle size of 4–6 nm have been prepared by template free ultrasonic mediated precipitation at room temperature. The as prepared particles have been characterized by UV–vis spectroscopy, XRD, N₂ adsorption–desorption isotherms, SEM and TEM techniques. The photocatalytic hydrogen production activity for the pure, noble metal loaded and supported mesoporous CdS has been studied. The photocatalytic activity has been compared with bulk and nanosize CdS prepared in our earlier studies. Among the prepared catalysts, Pt metal loaded mesoporous CdS shows highest hydrogen production rate of 1415 μmol/h/0.1 g catalyst. In the case of supported systems, irrespective of the particle size the basic MgO support shows higher activity than alumina support.     

Synthesis and characterization of poly(N‐methyl aniline) doped with sulphonic acids: Their application as humidity sensors

Single step chemical polymerization of N‐methyl aniline was carried out by using ammonium persulphate as an oxidizing agent. The conducting emeraldine salt phase of the polymers using camphor sulfonic acid and p‐toluene sulfonic acid as dopants was made by a direct process. The polymers were characterized by UV‐vis and FTIR spectroscopy, scanning electron microscopy, TGA, and conductivity measurements. The synthesized polymers were found to have very good physicochemical properties and good electrical conductivity. Conductivity measurements have shown “thermal activated behavior.” The change in resistance with respect to % relative humidity (RH) was observed, when pressed pellets of the polymer were exposed to the broad range of humidity (ranging between 20 and 100% RH). © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 812–820, 2006     

Characterization of degradation of polypropylene nonwovens irradiated by γ‐ray

Polypropylene is a leading commercial, fiber‐forming polymer due to its low cost and potential for making high strength fibers. As the polymer of choice in the biomedical field, polypropylene contains only two elements, namely carbon and hydrogen. As a result, it is very hydrophobic and bio‐inert lacking biodegradability in the landfill. Meltblown and spunbond polypropylene nonwovens were exposed to γ‐radiation doses up to 25 kGy. The changes in morphology, chemical, thermal, and tensile properties were characterized by various analytical techniques. Following γ‐radiation, the FTIR spectrum illustrated an increase in carbonyl groups suggesting radio‐oxidation. Additionally, there was a decrease in thermal and tensile properties indicating deterioration of the polymer. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 39917.     

3-substituted 2-phenylimidazo[2,1-b]benzothiazoles: synthesis, anticancer activity, and inhibition of tubulin polymerization

A new series of 3‐substituted 2‐phenylimidazo[2,1‐b]benzothiazoles ( 3 a – h ) were synthesized by C‐arylation of 2‐arylimidazo[2,1‐b]benzothiazoles using palladium acetate as catalyst, and the resulting compounds were evaluated for their anticancer activity. Compounds 3 a , 3 e , and 3 h exhibited good antiproliferative activity, with GI₅₀ values in the range of 0.19–83.1 μM . Compound 3 h showed potent anticancer efficacy against 60 human cancer cell lines, with a mean GI₅₀ value of 0.88 μM . This compound also induced cell‐cycle arrest in the G₂/M phase and inhibited tubulin polymerization followed by activation of caspase‐3 and apoptosis. A high‐throughput tubulin polymerization assay showed that the level of inhibition for compound 3 h is similar to that of combretastatin A‐4. Molecular modeling studies provided a molecular basis for the favorable binding of compounds 3 a , 3 e , and 3 h to the colchicine binding pocket of tubulin.     

Spectroscopic,transport, and morphological studies of polyaniline doped with inorganic acids

A conducting polymer, polyaniline, was synthesized by chemical polymerization using different inorganic acids, such as HCl, H₂SO₄, HClO₄, HNO₃, and H₃PO₄, as protonic acid media. The synthesized polymers were characterized using UV‐visible and FT‐IR spectroscopy. A granular type of morphology was observed under SEM for HCl, HNO₃, and H₃PO₄ doped polyanilines. However, HClO₄ doped polyaniline shows the folded lamellar structure derived from the fibers. The thermal stability of these polymers was investigated with the help of thermogravimetric (TG/SDTA) analysis. The formation of a greater fraction of the conducting emeraldine salt phase is observed in HClO₄ as a protonic acid media. The thermal stability of H₃PO₄ doped material is found to be better as compared with other acids. An increase in conductivity with an increase in temperature was observed in all the samples except for HClO₄ doped polyaniline. Polym. Eng. Sci. 44:1676–1681, 2004. © 2004 Society of Plastics Engineers.