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对硼掺杂纳米金刚石(BDND),硼掺杂微米金刚石(BDMD)和玻碳(GC)电极的电化学性质做了对比研究.利用扫描电子显微镜表征了BDMD和BDND电极,其表面粒子大小分别为1-5μm和20-100nm.利用Raman光谱对两种金刚石薄膜的成分进行了表征,结果表明利用热丝化学气相沉积法得到了高质量的BDND和BDMD薄膜.采用0.5mol·L-1H2SO4溶液测定了三种电极的电化学窗口,BDND和BDMD电极的电化学窗口分别为3.3和3.0V,远比GC电极(2.5V)的要宽.[Fe(CN)6]3-/[Fe(CN)6]4-溶液的循环伏安和交流阻抗测定表明,在BDND、BDMD和GC电极上的峰间距(△Ep)分别为73、92和112mV,且其电子传递电阻(Ret)分别为(98±5)、(260±19)和(400±25)Ω.我们也研究了0.1mmol·L-1双酚A在三种电极上的电化学氧化行为.上述的电化学测定结果表明,两种金刚石电极均比GC电极表现出了更宽的电化学窗口、更好的电化学可逆性质、更快的电子传递速度和更高的电化学稳定性,更为重要的是与BDMD相比BDND的电化学性质有进一步的提高.
The electrochemical properties of boron-doped diamond nanoparticles (BDND), boron-doped microdiamonds (BDMD) and glassy carbon (GC) electrodes were compared.Using scanning electron microscopy to characterize the BDMD and BDND electrodes, Were 1-5μm and 20-100nm.The Raman spectra of the two diamond films were characterized.The results show that high-quality films of BDND and BDMD were obtained by the hot filament chemical vapor deposition method.Using 0.5mol·L-1 H2SO4 solution The electrochemical windows of the three electrodes were measured and the electrochemical windows of BDND and BDMD electrodes were 3.3 and 3.0 V, respectively, which were much wider than the GC electrode (2.5 V). [Fe (CN) 6] 3 - / [Fe Cyclic voltammetry and AC impedance measurements showed that the peak spacings (△ Ep) at BDND, BDMD and GC electrodes were 73, 92 and 112 mV, respectively, and their electron transfer resistances (Ret) were (98 ± 5), (260 ± 19) and (400 ± 25) Ω. We also studied the electrochemical oxidation behavior of 0.1 mmol·L-1 bisphenol A on the three electrodes. The electrochemical measurements indicated above , Both diamond electrodes exhibit a wider electrochemical window than the GC electrode, with better electrochemical reversibility, faster electron transfer rates and more Electrochemical stability, more important is the electrochemical properties compared with BDMD BDND further improved.