1. In-situ growth of 3D rosette-like copper nanoparticles on carbon cloth for enhanced sensing of ammonia based on copper electrodissolution.
- Author
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Yang, Shengfei, Zang, Guangchao, Peng, Qianyu, Fan, Jingchuan, Liu, Yangkun, Zhang, Guangyuan, Zhao, Yinping, Li, Haomo, and Zhang, Yuchan
- Subjects
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AMMONIA , *ACTIVATION energy , *DETECTION limit , *NANOPARTICLES , *ELECTROLYTIC oxidation , *CARBON - Abstract
Copper is an attractive candidate for sensing ammonia. Here, an electrodissolution mechanism for measuring liquid-phase ammonia was developed via a novel three-dimensional rosette-like structure of copper nanoparticles (CuNPs) integrated onto carbon cloth (CuNPs/CC). A one-step hydrothermal synthetic procedure was employed to construct the metallic CuNPs with a stereo rosette-like pattern on flexible CC substrate. The morphology, composition and sensing performance of the as-prepared composite were characterised in detail. The CuNPs/CC composite showed excellent sensing performance to ammonia, which is attributed to the electrodissolution of CuNPs being promoted by ammonia to form a stabilised copper-ammonia complex. This electrochemical response occurs without the electro-oxidation of ammonia, thus avoiding the energy barrier of the N–N bond and the toxicity of N-adsorbates, which is advantageous for ammonia detection. In addition, the sensor also shows very high sensitivity to ammonia with a low detection limit, as well as good anti-interference performance, repeatability and stability. The high accuracy and precision for the quantification of ammonia concentration in a variety of real samples indicate that the CuNPs/CC composition has potential in the development of high-performance ammonia sensors. Image 1 • Novel consequences on the development of ammonia sensor. • Ideal 3D CuNPs/CC with easy preparation and good reproducibility. • A reliable electrodissolution mechanism with strong and fast response for successful application. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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