3 years ago

3D SnS2 hierarchical micro-flowers synthesized by ZnSn(OH)6 for ultra-sensitive NH3 sensor

Q.x. Zhang, S.y. Ma, G.j. Yang, R. Zhang, X.t. Wang, Q. Chen, L. Ma, S.t. Pei, K.m. Zhu, W.q. Wang, Y. Tie

Publication date: 1 February 2019

Source: Materials Letters, Volume 236

Author(s): Q.X. Zhang, S.Y. Ma, G.J. Yang, R. Zhang, X.T. Wang, Q. Chen, L. Ma, S.T. Pei, K.M. Zhu, W.Q. Wang, Y. Tie

Abstract

3D SnS2 hierarchical micro-flowers were successfully synthesized by a hydrothermal method with ZnSn(OH)6 hollow nanospheres as precursor. The 3D hierarchical microstructure with large specific surface area was obtained by self-assembling individual 2D nanometer sized sub-units. The architectures, morphologies and gas-sensing performances of the products were characterized and it was found that sensors based on SnS2 micro-flowers had a relatively high response value to 50 ppm ammonia gas at 160 °C, with response and recovery times of approximately 4 s and 15 s, respectively. The good gas-performance to low-concentration of ammonia is attributed to the structure of SnS2 which possessed a large surface area and void.

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