Promoting effects of Ag on In2O3 nanospheres of sub-ppb NO2 detection

• DOI: 10.1016/j.snb.2016.10.107
• Publication Date: 2016-10-24T15:31:17Z
• Authors: Bingxin Xiao; Shanliang Song; Pan Wang; Qi Zhao; Mingyan Chuai; Mingzhe Zhang
• Keywords: Morphology

Abstract Herein, high performance of sub-ppb NO 2 sensors were fabricated based on Ag nanoparticles (NPs) decorated on hierarchical In 2 O 3 nanospheres assembled by several nanocubes subunit via a facile hydrothermal route and the subsequent decoration process. The morphology evolution of the nanospheres is investigated, which revealed that the nanocubes of the nanospheres shared the same surface and self-assembled together according to the oriented attachment mechanism. When performing as sensors, such nanostructures possessed relatively good sensitivity to NO 2 . With respect to the decoration of Ag NPs, the sensing performances can be further remarkably promoted on account of the catalyst activation and spill-over effect.