Bismuth tungstate nano materials have been successfully synthesized by microwave assisted hydrothermal method. Bismuth nitrate (Bi(NO 3 ) 3 .5H 2 O) and sodium tungstate (Na 2 WO 4 .2H 2 O) are used as a starting material for the preparation of nano materials and solution pH was maintained to 3. The prepared material was characterized by X-ray diffraction (XRD) to study the phase state, whereas surface morphology was observed by Scanning Electron Microscopy (SEM). The surface area was determined by Brunauer-Emmett-Teller (BET) method. The results revealed that materials are crystalline in nature having crystallite size of ~ 24 nm with surface area of 6.5 m 2 /g. SEM image of prepared materials showed a unique discrete hierarchical morphology. The prepared material showed visible light active photocatalytic nature for the decomposition of Rhodamine B.
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