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Nanostructured boron-doped diamond electrode for seawater salinity detection

机译：用于海水盐度检测的纳米结构掺硼金刚石电极

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摘要

Electrodes with high response and stability are urgently required to reach a steady and accurate measurement of seawater salinity. Herein, boron-doped diamond (BDD) is for the first time considered as a promising alternative to commercial platinum black in seawater salinity detection due to their considerable conductivity and outstanding stability. However, the intrinsical low double layer capacitance (DLC) of planar BDD film (BDDF) electrodes affect their response in the detection. To solve these problems, boron-doped diamond nanorod forest (BDDNF) electrodes are fabricated via hot filament chemical vapor deposition. Noted, four orders of magnitude larger of DLC (2820 mu F/cm(2)) than BDDF (0.35 mu F/cm(2)) is achieved on BDDNF due to a much enhanced electroactive surface area which is calculated to be 1.47 times larger than BDDF. Benefited from the enhanced DLC and accelerating diffusion resulted by the nanostructure, the response of BDDNF exhibits an enhancement by a factor of 1.5 compared to BDDF at the salinity of 40 %o. Moreover, in striking contrast to commercial platinum black electrode, the obtained BDDNF electrodes exhibit outstanding stability thanks to the increased amount of carbon oxygen functional groups on BDDNF surface. This work greatly promises the potential applications of BDDNF electrodes in seawater salinity detection.
机译：迫切需要具有高响应度和稳定性的电极，以稳定，准确地测量海水盐度。在本文中，由于掺硼金刚石（BDD）具有很高的导电性和出色的稳定性，因此在海水盐度检测中首次被认为是商业铂黑的有前途的替代品。但是，平面BDD膜（BDDF）电极的固有低双层电容（DLC）会影响其在检测中的响应。为了解决这些问题，通过热丝化学气相沉积制备了掺硼金刚石纳米棒林（BDDNF）电极。值得注意的是，由于电活性表面积大大增加，因此BDDNF的DLC（2820μF / cm（2））比BDDF（0.35μF/ cm（2））大四个数量级，这是因为电活性表面积大大增加，据计算为1.47倍比BDDF大。得益于纳米结构增强的DLC和加速的扩散作用，在40％o的盐度下，BDDNF的响应性比BDDF增强了1.5倍。此外，与市售的铂黑电极形成鲜明对比的是，由于BDDNF表面上碳氧官能团的数量增加，所获得的BDDNF电极表现出优异的稳定性。这项工作极大地保证了BDDNF电极在海水盐度检测中的潜在应用。

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  • 来源
    《Applied Surface Science》 |2020年第may15期|145652.1-145652.8|共8页
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    Chinese Acad Sci Inst Met Res Shenyang Natl Lab Mat Sci 72 Wenhua Rd Shenyang 110016 Peoples R China|Univ Sci & Technol China Sch Mat Sci & Engn 72 Wenhua Rd Shenyang 110016 Peoples R China;

    Chinese Acad Sci Inst Met Res Shenyang Natl Lab Mat Sci 72 Wenhua Rd Shenyang 110016 Peoples R China;

    Qilu Univ Technol Shandong Acad Sci Inst Oceanog Instrumentat 37 Miaoling Rd Qingdao 266001 Peoples R China;

    Guangdong Inst New Mat Changxing Rd 363 Guangzhou 510650 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Boron-doped diamond; Double-layer capacitor; Nanorod forest; Salinity; Seawater; Conductivity electrode;

    机译：掺硼金刚石双层电容器;纳米棒林;盐度;海水;电导电极;

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