Chandigarh University

About: Chandigarh University is a education organization based out in Mohali, India. It is known for research contribution in the topics: Computer science & Chemistry. The organization has 1358 authors who have published 2104 publications receiving 10050 citations.

Methylene Blue Dye Adsorption from Wastewater Using Hydroxyapatite/Gold Nanocomposite: Kinetic and Thermodynamics Studies

Abstract: The present work demonstrates the development of hydroxyapatite (HA)/gold (Au) nanocomposites to increase the adsorption of methylene blue (MB) dye from the wastewater HA nanopowder was prepared via a wet chemical precipitation method by means of Ca(OH)2 and H3PO4 as starting materials The biosynthesis of gold nanoparticles (AuNPs) has been reported for the first time by using the plant extract of Acrocarpus fraxinifolius Finally, the as-prepared HA nanopowder was mixed with an optimized AuNPs solution to produce HA/Au nanocomposite The prepared HA/Au nanocomposite was studied by using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and Scanning Electron Microscopy (SEM) with Energy Dispersive X-Ray Analysis (EDX) analysis Adsorption studies were executed by batch experiments on the synthesized composite The effect of the amount of adsorbent, pH, dye concentration and temperature was studied Pseudo-first-order and pseudo-second-order models were used to fit the kinetic data and the kinetic modeling results reflected that the experimental data is perfectly matched with the pseudo-first-order kinetic model The dye adsorbed waste materials have also been investigated against Pseudomonas aeruginosa, Micrococcus luteus, and Staphylococcus aureus bacteria by the agar well diffusion method The inhibition zones of dye adsorbed samples are more or less the same as compared to as-prepared samples The results so obtained indicates the suitability of the synthesized sample to be exploited as an adsorbent for effective treatment of MB dye from wastewater and dye adsorbed waste as an effective antibacterial agent from an economic point of view

Corrosion performance of hydroxyapaite and hydroxyapaite/titania bond coating for biomedical applications

Abstract: The aim of current investigation is to access in-vitro corrosion performance of flame sprayed titania (TiO2) coated 316L stainless steel, hydroxyapatite (HAp) coated, hydroxyapatite/titania bond coated (HAp/TiO2) 316L stainless steel and plasma sprayed zirconia (ZrO2) coated 316L stainless steel. In HAp/TiO2 bond coatings, TiO2 was utilize as a bond coat between the 316L stainless steel substrate and HAp top coat. The different characterization methods such as SEM, EDS, XRD and electrochemical methods were used to analyse the electrochemical characteristics as well as microstructural morphology phases of the coatings. In addition the corrosion behavior of the coated and uncoated samples was performed in simulated body fluid. The tests were carried out for potentio-dynamic polarization and open circuit potential. The experimental results reveal that after the deposition of bond coatings (HAp, TiO2, ZrO2 and HAp/TiO2) the corrosion resistance of the steel was observed to increase.