3D porous α-Ni(OH)2 nanostructure interconnected with carbon black as a high-performance gas sensing material for NO2 at room temperature. Issue 123 (26th November 2015)

• Record Type: Journal Article
• Authors: Chu, Zhenyu; Sun, Hongxin; Xu, He; Zhou, Jiao; Zhang, Guo; Xie, Yu; Li, Li; Shi, Keying
• Is Part Of: RSC advances. Volume 5:Issue 123(2015)
• Page Start: 101760
• Page End: 101767
• Publication Date: 2015-11-26
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra17575e
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The 3D porous α-Ni(OH)2 /carbon black nanostructure composites were fabricated via a simple refluxing method using SDBS as the template. The composites exhibited excellent sensing properties with fast response and low detection limit of NO2 at room temperature. Abstract : Three dimensional (3D) α-Ni(OH)2 /carbon black composite (NiCB) was synthesized by a simple refluxing method using sodium dodecyl benzene sulfonate (SDBS) as the template and intercalation layer. NiCB with 20 mg carbon black (NiCB20) exhibited a fast response time of 2 s to 100 ppm NO2 at room temperature (RT). This type of 3D composite exhibited a flower-like nanostructure, which consisted of α-Ni(OH)2 nanoflakes and CB nanoparticles decoration at the centre of the flower structure, and featured a high surface area (175.1 m 2 g −1 ). A possible gas sensing mechanism was also discussed. The enhanced gas sensing properties could be ascribed to the synergism of the highly porous structure, high specific surface, and interactions between high conductivity of the CB and 3D α-Ni(OH)2 nanoplane, which was advantageous for gas to diffuse and adsorb–desorb onto the surface of the NiCB20. The high performance of α-Ni(OH)2 /CB sensors described herein demonstrates them to be a prospect material in environmental monitoring of NO2 .