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Perumal Karthikeyan Krishnapillai Ramkumar Kalimuthu Pandi Aqsa Fayyaz Sankaran Meenakshi Chang Min Park 《Ceramics International》2021,47(3):3692-3698
Industrial use of heavy metals and dyes critically depends on the effective handling of industrial effluents. Effective remediation of industrial effluents using various adsorbent materials has thus become critical. In this paper, we study two-dimensional MXenes as an adsorbent for removing Cr(VI) and methyl orange (MO) in waters. The physico-chemical performance of MXenes was studied using X-ray diffraction, Fourier transform infrared spectroscopy, Brunauer?Emmett?Teller, scanning electron microscopy, high resolution-transmission electron microscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy techniques. The adsorption system, including influence of contact time, pH of solutions, co-ions, and desorption experiments were performed for effective Cr(VI) and MO removal. The Cr(VI) and MO removal rate of the MXenes was very fast, and the kinetic system was driven by pseudo-second-order kinetics. The sorption isotherm closely well-tailored with the Langmuir isotherm, and the maximum removal efficiencies were 104 and 94.8 mg/g for Cr(VI) and MO, respectively. The MXenes was successfully regenerated by 0.1 M NaOH aqueous solution and can be repeatedly recycled. The uptake of Cr(VI) and MO by the MXenes was mainly due to chemical adsorption, namely electrostatic adsorption, complexation, surface interactions, and ion exchange mechanisms. This investigation demonstrates the selectivity and feasibility of the MXenes as a real adsorbent for eliminating Cr(VI) and MO from the aqueous environment. 相似文献
13.
Flurbiprofen-nicotinamide solid dispersions were prepared by the fusion method. The solid dispersions were evaluated for dissolution rate. The drug-carrier interaction in the liquid and solid states were studied by using phase solubility analysis, phase diagram, X-ray diffraction (XRD), and differential scanning calorimentry (DSC). Solid dispersions gave fast and rapid dissolution of flurbiprofen compared with the pure drug and the physical mixture. Phase diagram and DSC indicated that flurbiprofen and nicotinamide form a eutectic mixture. The aqueous solubility of flurbiprofen was enhanced in the presence of nicotinamide. 相似文献
14.
Kumar Ajay Abhishek Kumar Liu Xuan Haldorai Anandakumar 《Wireless Personal Communications》2021,117(4):3229-3253
Wireless Personal Communications - Smart cities or Smart societies require Internet of Things (IoT), for connecting numerous devices to enormous asset pools in cloud computing. This coordination of... 相似文献
15.
Amin Ruhul Islam SK Hafizul Vijayakumar Pandi Khan Muhammad Khurram Chang Victor 《Multimedia Tools and Applications》2018,77(9):11041-11066
Multimedia Tools and Applications - Remote mutual authentication provides an efficient platform through which an user accesses several resources of the remote serve at anytime over insecure channel... 相似文献
16.
Kalidoss Pandi S Venkatachalapathy S Suresh 《International Journal of Applied Ceramic Technology》2022,19(4):2236-2248
Optical and thermo-physical properties of the nanofluids play a major role in the absorption of solar energy. In the present study, photo-thermal energy conversion of low concentration Al2O3/Deionised water (DI) water and CuO/DI water nanofluids in solar thermal collector is experimentally investigated. Properties of 50,100,150, and 200 ppm concentrations of nanofluids are reported. The absorbance results in the visible range indicate that CuO nanofluid of 200 ppm concentration is nearly three times higher compared to Al2O3 nanofluid. The extinction coefficient, optical energy band gap, and photoluminescence obtained from the absorbance data are also reported. Surfactant free nanofluids are used, and the thermal conductivity measurements show a negligible enhancement for both the nanofluids. Maximum receiver temperatures of 89 and 72°C are found with CuO and Al2O3 nanofluids, respectively, for the maximum concentration. A maximum receiver efficiency of 34.89% is obtained for CuO nanofluids. 相似文献
17.
Synthesis of alginate beads filled with nanohydroxyapatite: An efficient approach for fluoride sorption
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Nanohydroxyapatite (n‐HAp) powder is a promising adsorbent material with high defluoridation capacity (DC); however, it causes pressure drop during field applications. To overcome such problems and utilize the advantages of n‐HAp, it is aimed to prepare n‐HAp in a usable bead form with the support of alginate (Alg) biopolymer. n‐HApAlgLa composite beads were synthesized by introducing n‐HAp powder in Alg polymeric gel, and the resulting solution was dropped into La3+ ions for crosslinking. Defluoridation experiments were carried out in batch mode to optimize various influencing parameters like contact time, pH, challenger anions, initial fluoride concentrations, and temperature. The beads were characterized using Fourier transform infrared spectroscopy, X‐ray diffraction, and scanning electron microscopy with energy‐dispersive X‐ray analyzer analysis. The sorption process was explained using diverse isotherms and kinetic models. The values of thermodynamic parameters indicate that the nature of fluoride is spontaneous and endothermic in nature. In field studies, n‐HApAlgLa beads reduce the fluoride concentration below the tolerance limit. The regeneration and reusability studies were proposed to effectively use the sorbent. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 41937. 相似文献
18.
TiO2–NiO and TiO2–WO3 nanocomposites were prepared by hydrothermal and surface modification methods. The samples were analyzed using X-ray diffraction, Scanning Electron Microscope images, Transmission Electron Microscope, Energy dispersive analysis, Zeta potential, Electrophoretic mobility and Photocatalysis activity measurement. XRD data sets of TiO2–NiO, TiO2–WO3 powder nanocomposite have been studied for the inclusion of NiO, WO3 on the anatase-rutile mixture phase of TiO2 by Rietveld refinement. The cell parameters, phase fraction, the average grain size, strain and bond lengths between atoms of individual phases have been reported in the present work. Shifted positional co-ordinates of individual atoms in each phase have also been observed. 相似文献
19.
Tao Feng Chaofan Nie Pandi Peng Hui Lu Tengjiao Wang Peng Li Wei Huang 《Nano Research》2022,(4):3323-3337
The emergence of human coronaviruses(HCoVs),especially the current pandemic caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),engender sever... 相似文献
20.
K. Pradeeswari A. Venkatesan P. Pandi R. Mohan Kumar 《Journal of Materials Science: Materials in Electronics》2018,29(23):19689-19696
Transition divalent metal cations (Zn2+, Ti2+) doped V2O5 nanoparticles were synthesized via non-aqueous sol–gel route. The influence of dopant materials on the characteristics of V2O5 nanoparticles was studied. XRD studies ensure that all the prepared samples possess phase pure orthorhombic structure. From the FESEM images, it was noted that the products possess uniform particle size around 20–30 nm. The presence of functional groups and dopants was confirmed by FTIR, Raman, and elemental analysis respectively. From UV–Vis spectra, the significant blue shift was observed for doped samples compared to pure V2O5 nanoparticles, which is attributed to the quantum confinement effect. The high capacity retention of the intercalation compound was measured by using C–V study and implies that the prepared samples are very promising electrode materials for supercapacitor. 相似文献