中南大学学报（自然科学版）2017，Vol.48Issue(10)：2583-2589,7.DOI:10.11817/j.issn.1672-7207.2017.10.004
PbO2/Ti阳极氧化苯酚的有效电流表征及阶段反应动力学
Quantitative characterization of effective current and step-reaction kinetics toward electro-oxidation of phenol on PbO2/Ti anode
摘要
Abstract
The electroplating method was employed for preparation of PbO2/Ti anode, which was determined by the X-ray diffraction (XRD) analysis and scanning electron microscope (SEM) characterization. A novel parameterγ, defined as fractional current applied to effective oxidation was proposed to describe the relation between the oxygen evolution and anodic oxidation of organic compounds. Then, step-reaction kinetics was achieved via Faraday's law by introducing the parameterγ. Phenol electro-oxidation experiment was carried out at different applied current densities and flow rates. The results show that the main content of the coating material on Titanium (Ti) isβ-PbO2 with average crystal size is about 50.23 nm, and these grains caneffectively grow to form aggregate with particle size of 5 μm to 10 μm even dispersed on the Ti plate. The oxygen evolution potential of the prepared PbO2/Ti anode is 1.78 V or so, and phenol can decrease oxygen evolution rate by increasing the resistance of water decomposition to 195.9 Ω, which is much higher than that in Na2SO4solution (148.3 Ω).The regressive analysis andF-test results confirm that the model prediction can satisfactorily match the experimental data.关键词
PbO2/Ti/阳极氧化/有效电流/阶段反应动力学/苯酚Key words
PbO2/Ti/anodic oxidation/effective current/step-reaction kinetics/phenol分类
资源环境引用本文复制引用
王立章,伍波,李鹏,赵玉,李哲楠,杨胜翔,赵跃民..PbO2/Ti阳极氧化苯酚的有效电流表征及阶段反应动力学[J].中南大学学报（自然科学版）,2017,48(10):2583-2589,7.基金项目
江苏省重点研发计划项目(BE2017640) （BE2017640）
徐州市科技计划项目(KC16SS090)(Project (BE2017640) supported by the Key Research & Development Plan of Jiangsu Province （KC16SS090）
Project (KC16SS090) supported by the Xuzhou Science and Technology Plan Project) （KC16SS090）
