摘要
以中孔SBA-15为载体采用固相研磨法合成限域型催化剂CoO_(x)@SBA-15,采用传统浸渍法合成负载型催化剂CoO_(x)/SBA-15和CoO_(x)/SiO_(2)作为对比.利用X射线衍射(XRD)、透射电子显微镜测试(TEM)等表征技术对催化剂的结构和组成进行分析,并对催化剂活化PMS降解氯苯的性能进行了研究.结果表明,CoO_(x)@SBA-15具有更高的催化活性,氯苯的降解反应受氯苯和PMS在催化剂表面吸附控制,CoO_(x)@SBA-15/PMS/CB催化体系中的主要活性物种为SO_(4)·^(-)和1O_(2).
Supported Co catalysts on SBA-15 were prepared using a solid-state reaction between Co(NO_(3))_(2) and organic template-occluded SBA-15.The catalysts were characterized by X-ray diffraction(XRD),N_(2) adsorption-desorption,H_(2) temperature-programmed reduction and Transmission Electron Microscope(TEM).Catalytic activities of the catalysts were investigated by activating PMS for chlorobenzene degradation.The results showed that CoO_(x)@SBA-15 had a higher activity than other catalysts.The degradation of chlorobenzene on catalyst followed the LangmuirHinshelwood model,reflecting that the activation of adsorbed PMS was the rate controlling step.EPR results showed that the main active species involved in the catalytic system CoO_(x)@SBA15/PMS/CB were SO_(4)^(·-)and 1O_(2).
作者
周军燕
付翯云
郑寿荣
ZHOU Junyan;FU Heyun;ZHENG Shourong(State Key Laboratory of Pollution Control and Resource Reuse,School of the Environment,Nanjing University,Nanjing,210046,China)
出处
《环境化学》
CAS
CSCD
北大核心
2023年第8期2696-2705,共10页
Environmental Chemistry
基金
国家重点研发计划(2020YFC1807003)
江苏省自然科学基金(BK20190059)
国家自然科学基金(21976086)资助..
