Porous WS2 and W2N powders by hard templating with colloidal silica. Issue 1 (January 2017)

• Record Type: Journal Article
• Authors: Gibot, P.; Parmentier, J.; Vidal, L.; Schnell, F.; Nouali, H.; Spitzer, D.
• Is Part Of: Ceramics international. Volume 43:Issue 1(2017)Part B
• Page Start: 1443
• Page End: 1448
• Publication Date: 2017-01
• Subjects: Tungsten disulfide -- Tungsten nitride -- Surface properties -- Colloidal silica -- Hard-template; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.10.111
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Meso- and macroporous tungsten disulfide (WS2 ) and tungsten nitride (W2 N) powders were successfully synthesized by reduction of [WO3 /colloidal silica] composites under hydrogen sulfide and ammonia gases respectively. The colloidal silica, marketed as Ludox ®, was used as a hard template and its removal from the composite led to a porosity release. The products were characterized by X-ray diffraction, nitrogen adsorption, mercury porosimetry and electron microscopy. Well-crystallized samples with specific surfaces areas close to ~40 m 2 g −1 were thus synthesized. The present approach might be easily extended to the synthesis of other nitrides and sulfides materials.