Bai Hongmei, He Ping, Chen Jingchao, Liu Kaili, Lei Hong, Zhang Xiaojuan, Dong Faqin, Li Hong
State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China E-mail:
Engineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China.
Water Sci Technol. 2017 Jan;75(1-2):220-227. doi: 10.2166/wst.2016.509.
Thermal decomposition method was employed to prepare a Ti/SnO-RuO electrode, on which electrocatalytic degradation of bromocresol green (BCG) was investigated in detail. Scanning electron microscopy, an X-ray diffraction analyzer and an X-ray fluorescence spectrometer were adopted to characterize the morphology, crystal structure and element analysis of the as-prepared Ti/SnO-RuO electrode. It was indicated that the Ti/SnO-RuO electrode had a 'cracked-mud' structure and exhibited a superior specific surface area. The removal efficiency of BCG on the Ti/SnO-RuO electrode was determined in terms of chemical oxygen demand and ultraviolet-visible absorption spectrometry. The results of the batch experiment indicated that the removal efficiency of BCG was influenced by the following factors in descending order: initial pH, reaction temperature, current density and electrolysis time. The removal efficiency of BCG reached up to 91% at the optimal experiment conditions (initial concentration of 100 mg L, initial pH 7, reaction temperature of 30 °C, current density of 12 mA cm and electrolysis time of 150 min). As a result, it was concluded that BCG wastewater was efficiently removed by electrochemical oxidation on the Ti/SnO-RuO electrode.
采用热分解法制备了Ti/SnO-RuO电极，并详细研究了该电极对溴甲酚绿（BCG）的电催化降解性能。采用扫描电子显微镜、X射线衍射分析仪和X射线荧光光谱仪对制备的Ti/SnO-RuO电极的形貌、晶体结构和元素组成进行了表征。结果表明，Ti/SnO-RuO电极具有“龟裂泥”结构，比表面积较大。通过化学需氧量和紫外可见吸收光谱法测定了BCG在Ti/SnO-RuO电极上的去除效率。批量实验结果表明，影响BCG去除效率的因素从大到小依次为：初始pH值、反应温度、电流密度和电解时间。在最佳实验条件下（初始浓度为100 mg/L，初始pH值为7，反应温度为30℃，电流密度为12 mA/cm²，电解时间为150 min），BCG的去除效率高达91%。结果表明，Ti/SnO-RuO电极通过电化学氧化能有效去除BCG废水。
