Abstract
Lead-free compound (Na0.5Bi0.5)(Zr0.75Ti0.25)O3 was prepared using conventional ceramic technique at 1070C /4h in air atmosphere. X-ray diffraction analysis showed the formation of single-phase orthorhombic structure. Permittivity data showed low temperature coefficient of capacitance (TCC ≈ 5%) up to 100
Address
Lily: University Department of Physics, T. M. Bhagalpur University, Bhagalpur - 812 007, India; K.L. Yadav: Department of Physics, Indian Institute of Technology, Roorkee - 247 667, India; K. Prasad: University Department of Physics, T. M. Bhagalpur University, Bhagalpur - 812 007, India
Abstract
Incorporation of polar functional moieties into polyethylene (PE) film has been achieved by graft copolymerization of polar monomers such as methacrylic acid (MAAc) and acrylamide (AAm) on to PE film, preirradiated with
Key Words
polyethylene film; swelling; ion separation; metal uptake; biodegradation; desalination
Address
Inderjeet Kaur, Nitika Gupta and Vandna Kumari: Department of Chemistry, Himachal Pradesh University, Shimla-171005, India
Abstract
The transition metal salt doped solid polymer electrolyte [TSPE] were prepared with HPMC as a host polymer. The virgin and doped films were prepared by solution-casting method and investigated using wide angle X-ray scattering method. Micro structural parameters like lattice strain (g%), stacking/twin faults, the average number of unit cells counted in a direction perpendicular to the Bragg
Key Words
doping; whole powder pattern fitting; AC conductivity; tensile strength; crystallite size
Address
Y. Prakash and H. Somashekarappa: Department of Physics, Yuvaraja
Abstract
Enantioselective macromer of trimesic acid was prepared using S(−) menthol with trimesoyl chloride on polyimide (PI) ultrafiltration membrane. The chemical composition of macromer as well as polyimide ultrafiltration membrane was determined by ATR-FTIR Spectroscopy. The optical resolution of chiral alcohols was performed in pressure driven process. The effect of monomer solutions concentration, effect of air-drying time of S(−) menthol solution, effect of reaction time, effect of operating pressure, effect of feed concentration of racemate on the performance of macromer was studied. The synthesised material exhibits separation of chiral alcohols (menthol ~23% and sobrelol ~21%).
Key Words
chiral alcohols; enantioselective membrane; polyimide; optical resolution
Address
Pravin G. Ingole: Greenhouse Gas Research Center, Korea Institute of Energy Research (KIER) 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Korea; Central Salt & Marine Chemicals Research Institute, Council of Scientific and Industrial Research (CSIRCSMCRI), Bhavnagar, Gujarat, India-364 002; Hari C. Bajaj and Kripal Singh: Central Salt & Marine Chemicals Research Institute, Council of Scientific and Industrial Research (CSIRCSMCRI), Bhavnagar, Gujarat, India-364 002
Abstract
Heterogeneous photocatalysis is a rapidly developing field in environmental engineering. It has a great potential to cope with the increasing pollution in the air. The addition of a photocatalyst to ordinary building materials such as tiles, concrete, paints, creates environmental friendly materials by which air pollution or pollution of the surface itself can be controlled and diminished. This work reports the results of the laboratory research, especially carried out towards air purifying action and self-cleaning measurements. In particular the research was focused on the study of the photocatalytic behavior of industrially prepared tiles produced starting from commercial micro-sized TiO2. Air purification action has been investigated through NOx degradation tests. On the contrary, the degradation of pollution at the surface, also called as self-cleaning action, is verified by the degradation of two different organic dyes: Rhodamine B (red color) and Metanil yellow (yellow).
Key Words
self-cleaning; photocatalysis; TiO2; micro-sized powder; photoactive tiles
Address
C.L. Bianchi and S. Gatto: Universita degli Studi di Milano, Dip. Chimica – 20133 Milano, Italy; Consorzio INSTM 50121 Firenze, Italy; S. Nucci: Universita degli Studi di Milano, Dip. Chimica – 20133 Milano, Italy; G. Cerrato: Consorzio INSTM 50121 Firenze, Italy; Universita degli Studi di Torino, Dip. Chimica & NIS Centre of Excellence –10125 Torino, Italy; V. Capucci: GranitiFiandre SpA. 42014 Castellarano, Italy
