茜素红阻抗电化学试验毕业论文
2021-12-15 23:05:26
论文总字数:16253字
摘 要
基于电化学工作站,通过研究茜素红在不同变量下的交流阻抗实验,建立等效电路模型。实验表明,碳钢电极作为工作电极,所得Nyqusit图是最合适的;分析各组实验Nyqusit图,均属于Randles模型;由Bode图分析可知增加频率的同时,系统阻抗模值随之降低,增加浓度系统的阻抗会增加,但是会有上限,PH值变化给交流阻抗实验带来的影响较为复杂,值得注意的是碱性环境下,电极表面会形成一层薄膜,成分为茜素红络合物,能起到保护电极的作用。通过分析,计算得出了等效电路图,等效电路元件有Re(溶液电阻),Rct(电荷转移电阻),Cpe(相位角元件)。
关键词:茜素红 等效电路 阻抗模值 Nyqusit图
Abstract
Based on the electrochemical workstation, the equivalent circuit model was established by studying the alternating current impedance experiment of alizarin red under different variables. The results show that the Nyqusit diagram is the most suitable one with the carbon steel electrode as the working electrode. Nyqusit diagram of each experiment was analyzed, which all belonged to Randles model. Known from the analysis of Bode diagram, as well as increase the frequency of system impedance modulus decreases, increase concentration system impedance increases, but there will be a limit, the PH change to the effects of ac impedance experiment is relatively complicated, it is worth noting that the alkaline environment, can form a layer of thin film electrode surface, ingredients for alizarin red complex, can protect the electrode. Through analysis, the equivalent circuit diagram is obtained. The equivalent circuit elements are Re (solution resistance), Rct (charge transfer resistance) and Cpe (phase Angle element).Based on the electrochemical workstation, the equivalent circuit model was established by studying the alternating current impedance experiment of alizarin red under different variables. The results show that the Nyqusit diagram is the most suitable one with the carbon steel electrode as the working electrode. Nyqusit diagram of each experiment was analyzed, which all belonged to Randles model. Known from the analysis of Bode diagram, as well as increase the frequency of system impedance modulus decreases, increase concentration system impedance increases, but there will be a limit, the PH change to the effects of ac impedance experiment is relatively complicated, it is worth noting that the alkaline environment, can form a layer of thin film electrode surface, ingredients for alizarin red complex, can protect the electrode. Through analysis, the equivalent circuit diagram is obtained. The equivalent circuit elements are Re (solution resistance), Rct (charge transfer resistance) and Cpe (phase Angle element).
KeyWord:Alizarin red Equivalent circuit Impedance modulus Nyqusit diagram
目录
摘 要 I
Abstract II
第一章 前 言 1
第二章 实验部分 3
2.1 实验仪器 3
2.2 实验试剂 4
2.3 实验方法 4
2.3.1 开路电位-时间曲线 4
2.3.2 交流阻抗法 5
第三章 结果与讨论 5
3.1 ARS的开路电位结果 5
3.2 ARS阻抗试验的电极差异 7
3.3 ARS碳钢阻抗试验的频率影响 9
3.4 ARS碳钢阻抗试验的pH值影响 12
3.5 ARS碳钢阻抗试验的浓度影响 15
3.6 ARS碳钢阻抗结果的等效电路模型 18
第四章 结论与展望 20
参考文献 22
致谢 24
第一章 前 言
- 选题背景
电化学阻抗技术,即通过控制电化学系统的电流变化:随时间按小振幅正弦规律波动,测量电化学系统随时间发生相应的电压(或电流)的变化,或者测量出电化学体系的阻抗,进而测量体系内部的反应机理、分析拟合测量体系的等效电路模型[1][2]。电化学阻抗技术在平衡电位条件下,施加很小的扰动信号,相当于原位测量,对电极反应过程的影响是非常小的,并且能够分辨电化学腐蚀过程的控制步骤,以研究金属腐蚀的作用机理及腐蚀规律[3][4][5][6]。
此外,为提高工农业生产水平,提高生活质量,人类在日常生活和工农业生产时大量使用化学试剂,随之发生的爆炸和泄漏现象也因此屡见不鲜,这直接地给人类的日常生活带来了及其严重的影响,为了改善人类的生存环境和身体健康,环境污染物的检测也受到了广大普通人民的关注。目前,基于电化学技术的电传感器因其具有容易实现小型化、设计和制作方便、响应快速、成本低等优势而被广泛应用于各行各业中[7]。
请支付后下载全文,论文总字数:16253字
您可能感兴趣的文章
- 用于污染沉积物原位修复的新型活性炭基材料外文翻译资料
- 碳氢化合物储存活动对土壤污染的初步评估:主要场地调查选择外文翻译资料
- 以玉米秸秆为基础的生物质材料为修复石油碳氢化 合物污染土壤的洗涤废水的再生外文翻译资料
- 生物测定知道的长三角工业废水处理厂污泥和相关再利用材料中读毒物的鉴定外文翻译资料
- 循环经济中低排放生态工业园区概念设计的模型框架:以藻类为中心商业联盟为例外文翻译资料
- VOCs废气治理工艺评价指标体系及应用研究外文翻译资料
- 生态工业碳代谢的生态网络分析外文翻译资料
- 基于生态适宜性分析的武汉市土地利用规划环境影响评价外文翻译资料
- 企业环境评价的组合方法与多准则分析综述外文翻译资料
- 生物质炭对森林土壤微生物生长代谢的影响任务书