CeO_(2)/γ-Al_(2)O_(3)臭氧催化剂制备及降解双酚A性能  

Preparation and performance of CeO_(2) ozone catalyst for BPA degradation

作　　者：邬淑红 代卫国[2] 童琴 林琳[2] 叶小芳[2] 赵昆峰 何丹农 WU Shuhong;DAI Weiguo;TONG Qin;LIN Lin;YE Xiaofang;ZHAO Kunfeng;HE Dannong(School of Material Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;National Engineering Research Center for Nanotechnology,Shanghai 200241,China)

机构地区：[1]上海交通大学材料科学与工程学院,上海200240 [2]纳米技术及应用国家工程研究中心,上海200241

出　　处：《应用技术学报》2024年第3期296-302,共7页Journal of Technology

基　　金：上海市优秀技术带头人项目(19XD1431800)资助。

摘　　要：双酚A(BPA)是一种难自然降解的内分泌干扰物质,其通过干扰天然激素的方式对生物和人体造成危害。以γ-Al_(2)O_(3)小球为载体,采用水热法(Hyd)和浸渍法(Imp)制备了CeO_(2)/γ-Al_(2)O_(3)负载型整体式臭氧催化剂,通过X射线衍射(XRD)、扫描电子显微镜(SEM)、拉曼光谱(Raman)、比表面积及孔径分析(物理吸附)对催化剂的结构、形貌和组成进行了表征,并考察了2种方法制备的CeO_(2)/γ-Al_(2)O_(3)在常温常压下催化降解水中污染物BPA的能力。结果表明,2种方法制备的负载型整体式催化剂降解BPA性能稳定;催化剂脱落率低,负载稳定。在相同的反应条件下,废水的总有机碳(TOC)去除率可由单纯臭氧氧化的32.34%增加到CeO_(2)/γ-Al_(2)O_(3)(Hyd)体系的84.31%;CeO_(2)/γ-Al_(2)O_(3)(Hyd)降解BPA的速率和效率明显高于CeO_(2)/γ-Al_(2)O_(3)(Imp)。制备的负载型整体式稀土臭氧氧化催化剂不仅可以解决固相催化剂易流失难回收的问题,而且可有效提高负载型催化剂的催化效率,具有很好的工业应用前景。As an important chemical material,bisphenol A(BPA)is a naturally refractory endecrine interfering substance,which will harm to organisms and human beings by the interference of natural hormone.Two CeO_(2)-based materials were prepared on theγ-Al_(2)O_(3) monolithic spherical support with hydrothermal method and impregnation method.The structure,morphology,and composition of the CeO_(2) were characterized using X-ray diffraction(XRD),scanning electron microscopy(SEM),Raman spectroscopy(Raman)and specific surface area and pore size distribution analyzer(physical adsorption).The ability of CeO_(2)/γ-Al_(2)O_(3) prepared by two methods to catalyze the degradation of BPA in water was investigated at room temperature and pressure.Results indicate that the supported catalysts prepared by the two methods have stable performance with low leaching rate and stable loading in degrading BPA.The total organic carbon(TOC)removal rate of wastewater can be increased from 32.34%of pure ozone oxidation to 84.31%of CeO_(2)/γ-Al_(2)O_(3)(Hyd)which is much higher than that of CeO_(2)/γ-Al_(2)O_(3)(Imp).The prepared monolithic catalyst of rare earth ozone oxidation has good industrial application prospect,since it solves the problem of difficult recovery of solid-phase catalysts while effectively improves the catalytic efficiency of supported catalysts.

关 键 词：整体式催化剂 CeO_(2) 双酚A(BPA) 水热 浸渍法 降解 

分 类 号：O643[理学—物理化学]