稀土改性钛基二氧化锡催化电极制备及降解苯酚研究

改性钛基电极以析氧过电位低、副反应少、使用寿命长等优点得到广泛应用.采用钛酸丁脂作为钛源,SnCl4＆#183;5H2O为锡源,掺杂不同Ce量,采用浸渍法制备稀土改性钛基二氧化锡催化电极,用XRD对电极进行表征,同时采用制备的电极进行苯酚降解实验,考察了电流强度、降解时间、pH和电解质浓度对降解率的影响.稀土改性电极表面呈纳米结构,苯酚降解率随电流强度、降解时间、电解质浓度增加而升高,随pH值增大先增加后降低,实验条件下苯酚降解率可达到90％;通过实验数据得到了降解率的关联式,计算值与实验值吻合较好,误差在＆#177;10％范围内.

Study on the Preparation of Rare Earth Modified Ti-based Stannic Oxide Catalytic Electrode and Phenol Degradation

Modified Ti-based electrode is extensively applied by virtue of its low oxygen overpotential, less side reaction and long service life. With butyl titanate as titanium source and SnCl4 .SHOO as tin source, Ce of different volumes is blen- ded to prepare rare earth modified ti-based stannic oxide catalytic electrode with the method of dipping. The electrode is represented with XRD. Meanwhile it is subject to phenol degradation experiment where study is carried out regarding the influence of current intensity, degradation period, pH and concentration of electrolyte on degradation rate. Results indicate that rare earth modified electrode is nano-structured superficially; the rate of Phenol degradation rises with the increase of cur- rent intensity, degradation period, pH and concentration of electrolyte, and the rate increases firstly and decreases then with the increase of pH value; the rate of Phenol degradation is up to 90% under experiment conditions; a correlation of degradation rate is determined with experimental data. Calculated value is identical to experimental value with an error within ±10%.