氧化热处理对不锈钢基碳纳米管结构及其电化学检测性能的影响

发布时间：2018-12-16 06:25

【摘要】：采用化学气相沉积法,以不锈钢基体中的Fe、Ni等成分为催化剂,直接在其表面生长碳纳米管并进行氧化热处理。采用场发射扫描电镜观察制备的碳纳米管形貌及尺寸,并采用接触角测量方法检测试样亲水性质,结合透射电镜、拉曼光谱和XPS检测分析氧化热处理引起的碳管形貌和特征差异,最后考察尿酸在碳纳米管电极上的电化学响应。结果表明,氧化热处理使碳纳米管平滑的表面变得粗糙,暴露出了更多的边平面结构,并且碳纳米管从疏水变为超亲水状态,使其在电化学反应过程中电极表面能够更好地与溶液中的物质接触,有利于材料电化学性能的提高;以经过氧化热处理的碳纳米管为电极,能够在大量抗坏血酸存在的条件下选择性地测定尿酸。
[Abstract]:Carbon nanotubes (CNTs) were grown directly on the surface of stainless steel by chemical vapor deposition (CVD) with Fe,Ni in stainless steel as catalyst. The morphology and size of the carbon nanotubes were observed by field emission scanning electron microscope (SEM). The hydrophilic properties of the carbon nanotubes were measured by contact angle measurement. The morphology and characteristics of carbon tubes induced by oxidation heat treatment were analyzed by Raman spectroscopy and XPS. Finally, the electrochemical response of uric acid on carbon nanotube electrodes was investigated. The results showed that the smooth surface of carbon nanotubes was roughened by oxidative heat treatment, and more edge plane structures were exposed, and the carbon nanotubes changed from hydrophobic to superhydrophilic state. In the process of electrochemical reaction, the electrode surface can better contact with the substance in the solution, which is beneficial to the improvement of the electrochemical performance of the material. The oxidation treated carbon nanotubes (CNTs) can selectively determine uric acid in the presence of a large amount of ascorbic acid.
【作者单位】：武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室;普渡大学工业工程学院;
【基金】：国家自然科学基金资助项目(51171133,51471122) 湖北省自然科学基金重点项目(2015CFA128)
【分类号】：TB383.1;O657.1

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