01653nas a2200157   4500008004100000022001400041245021800055210006900273260000900342300001400351490000700365520093800372100002901310700003101339856012501370       2017                        eng d  a1466-803300aSelective synthesis of WO3 and W18O49 nanostructures: ligand-free pH-dependent morphology-controlled self-assembly of hierarchical architectures from 1D nanostructure and sunlight-driven photocatalytic degradation0 aSelective synthesis of WO3 and W18O49 nanostructures ligandfree   cAPR   a2096-21050 v193 a<p>In this study, simple inorganic routes for the synthesis of WO3 and W18O49 nanostructures with variable size and self-assembly are reported. The morphologies and formation of stoichiometric WO3 as well as substoichiometric W18O49 single-crystal phase could be controlled by changing the pH of the reactions medium. This synthesis strategy has the advantages that it is one step, aqueous medium-based, and requires no surfactant or stabilizing agent. Furthermore, it also enables the self-assembly of 1D nanorods of WO3 and W18O49 into hierarchical nanostructures as nanorods bundles, cocoons, urchins, fishbones, etc. This synthesis method may open up a new way to control and tune the stoichiometric and substoichiometric composition of metal oxide nanostructures. Efficient sunlight-driven photocatalytic performance to degrade Rhodamine B (100 mL; 40 mg L-1.) with these tungsten oxide nanostructures was also demonstrated.</p>1 aShirke, Yogita, Manikrao1 aMukherjee, Shatabdi, Porel  uhttps://library.ncl.res.in/content/selective-synthesis-wo3-and-w18o49-nanostructures-ligand-free-ph-dependent-morphology