Affiliation:
1. School of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China
Abstract
AbstractTiO2 nanotube arrays (TNTA) were prepared by anodization, and then bismuth oxide (Bi2O3) was deposited on TNTA by vacuum impregnation‐chemical precipitation method to prepare Bi2O3@TNTA composite electrodes, which were used to detect 4‐nitrophenol (4‐NP) as an electrochemical (EC) sensor. The effects of the Bi2O3 loading amount and the pH value of the detection solution on the detection performance were exhaustively studied. Under best conditions, the linear range is 5 μΜ–30 mM, the sensitivity is 0.6696 μA ⋅ μM−1 ⋅ cm−2, and the limit of detection is 0.64 μΜ. The composite electrodes are characterized by outstanding reproducibility, superior stability and strong selectivity.
Funder
National Natural Science Foundation of China