08-10-2015 дата публикации
Номер: US20150287485A1
Автор:
Ambekar Jalindar D.,
Amlanerkar Dinesh P.,
Apte Sanjay K.,
Chatterjee Sandip,
Kale Bharat B.,
Kawade Ujjwala V.,
Kulkarni Milind V.,
Naik Sonali D.,
Panmand Rajendra P.,
Shroff Nilofer,
Sonawane Ravindra S.
Принадлежит:
The present disclosure relates to a process for synthesis of barium bismuth sulfide nanofibers, having equivalent shielding capacity as lead. The present disclosure also relates to a radiation shielding articles and cosmeceuticals. 1. A process for synthesis of barium bismuth sulfide nanofibers , said process comprising the following steps;a. dissolving barium nitrate, bismuth nitrate pentahydrate and thiourea in a solvent system to obtain a dispersion containing complex of barium bismuth sulfide; andb. mixing at least one surfactant in the dispersion under continuous agitation to obtain a mixture;c. heating the mixture at a temperature ranging between 120° C. and 180° C. in an apparatus for 24 hours followed by cooling at a temperature ranging between 20° C. and 30° C. to obtain a precipitate; andd. washing the precipitate by employing at least one solvent selected from the group consisting of water, ethanol, methanol, isopropanol and acetone to obtain nanofibers of barium bismuth sulfide.2. The process as claimed in claim 1 , wherein the solvent system is a combination of ethylene glycol and water at a proportion ranging between 1:1 and 3:1.3. The process as claimed in claim 1 , wherein the surfactant is at least one selected from the group consisting of cetyl trimethylammonium bromide claim 1 , polyvinyl alcohol and polyethylene glycol p-(1 claim 1 ,1 claim 1 ,3 claim 1 ,3-tetramethylbutyl)-phenyl ether.4. The process as claimed in claim 1 , wherein the average diameter of the nanofibers is between 20 nm and 50 nm.5. The process as claimed in claim 1 , wherein the average length of the nanofibers is between of 1 μm and 3 μm.6. Barium bismuth sulfide nanofibers obtained by the process as claimed in ; said nanofibres characterized by (a) diameter of 20 nm to 50 nm and (b) the length of 1 μm to 3 μm and the X-Ray diffraction pattern having 20 values at 28.58 claim 1 , 24.95 claim 1 , 46.52 claim 1 , 31.82 claim 1 , 52.7 claim 1 , 45.53 claim 1 , 32.87 claim 1 , 39. ...
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