%0 Journal Article
%T Nano-Needle Boron-Doped Diamond Film with High Electrochemical Performance of Detecting Lead Ions.
%A Yuan X
%A Yang M
%A Wang X
%A Zhu Y
%A Yang F
%J Materials (Basel)
%V 16
%N 21
%D 2023 Oct 31
%M 37959582
%F 3.748
%R 10.3390/ma16216986
%X Nano-needle boron-doped diamond (NNBDD) films increase their performance when used as electrodes in the determination of Pb2+. We develop a simple and economical route to produce NNBDD based on the investigation of the diamond growth mode and the ratio of diamond to non-diamond carbon without involving any templates. An enhancement in surface area is achievable for NNBDD film. The NNBDD electrodes are characterized through scanning electron microscopy, Raman spectroscopy, X-ray diffraction, cyclic voltammetry, electrochemical impedance spectroscopy, and differential pulse anodic stripping voltammetry (DPASV). Furthermore, we use a finite-element numerical method to research the prospects of tip-enhanced electric fields for sensitive detection at low Pb2+ concentrations. The NNBDD exhibits significant advantages and great electrical conductivity and is applied to detect trace Pb2+ through DPASV. Under pre-deposition accumulation conditions, a wide linear range from 1 to 80 µgL-1 is achieved. A superior detection limit of 0.32 µgL-1 is achieved for Pb2+, which indicates great potential for the sensitive detection of heavy metal ions.