Bismuth-Decorated Honeycomb-like Carbon Nanofibers: An Active Electrocatalyst for the Construction of a Sensitive Nitrite Sensor
Fengyi Wang,
Ye Li,
Chenglu Yan,
Qiuting Ma,
Xiaofeng Yang,
Huaqiao Peng,
Huiyong Wang,
Juan Du,
Baozhan Zheng,
Yong Guo
Affiliations
Fengyi Wang
Institute of Quality Standard and Testing Technology for Agro-Products, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
Ye Li
College of Chemistry, Sichuan University, No. 29 Wangjiang Road, Chengdu 610064, China
Chenglu Yan
Key Laboratory of Aviation Fuel & Chemical Airworthiness and Green Development, The Second Research Institute of Civil Aviation Administration of China, Chengdu 610041, China
Qiuting Ma
College of Chemistry, Sichuan University, No. 29 Wangjiang Road, Chengdu 610064, China
Xiaofeng Yang
Institute of Quality Standard and Testing Technology for Agro-Products, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
Huaqiao Peng
Key Laboratory of Aviation Fuel & Chemical Airworthiness and Green Development, The Second Research Institute of Civil Aviation Administration of China, Chengdu 610041, China
Huiyong Wang
College of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453002, China
Juan Du
College of Chemistry, Sichuan University, No. 29 Wangjiang Road, Chengdu 610064, China
Baozhan Zheng
College of Chemistry, Sichuan University, No. 29 Wangjiang Road, Chengdu 610064, China
Yong Guo
College of Chemistry, Sichuan University, No. 29 Wangjiang Road, Chengdu 610064, China
The existence of carcinogenic nitrites in food and the natural environment has attracted much attention. Therefore, it is still urgent and necessary to develop nitrite sensors with higher sensitivity and selectivity and expand their applications in daily life to protect human health and environmental safety. Herein, one-dimensional honeycomb-like carbon nanofibers (HCNFs) were synthesized with electrospun technology, and their specific structure enabled controlled growth and highly dispersed bismuth nanoparticles (Bi NPs) on their surface, which endowed the obtained Bi/HCNFs with excellent electrocatalytic activity towards nitrite oxidation. By modifying Bi/HCNFs on the screen-printed electrode, the constructed Bi/HCNFs electrode (Bi/HCNFs-SPE) can be used for nitrite detection in one drop of solution, and exhibits higher sensitivity (1269.9 μA mM−1 cm−2) in a wide range of 0.1~800 μM with a lower detection limit (19 nM). Impressively, the Bi/HCNFs-SPE has been successfully used for nitrite detection in food and environment samples, and the satisfactory properties and recovery indicate its feasibility for further practical applications.
