纳米CeO_2中空球合成及在染料废水处理中的应用

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英文篇名：Synthesis of nano-CeO_2 hollow sphere and its application in dye wastewater treatment 作者：高巍 ; 张春英 英文作者：GAO Wei;ZHANG Chun-ying;City College,Jilin Jianzhu University;PetroChina Jilin Petrochemical Company Research Institute; 关键词：CeO_2 ; 水热法 ; 中空球 ; 废水处理 英文关键词：ceria;;hydrothermal method;;hollow sphere;;wastewater treatment 中文刊名：FMYG 英文刊名：Powder Metallurgy Industry 机构：吉林建筑大学城建学院;中国石油吉林石化研究院; 出版日期：2019-02-10 出版单位：粉末冶金工业 年：2019 期：v.29;No.169 基金：2017国家级大学生创新创业训练计划项目(教高司函[2017]40号201713604018) 语种：中文; 页：FMYG201901017 页数：3 CN：01 ISSN：11-3371/TF 分类号：66-68

摘要

以Ce(NO_3)_3·6H_2O为Ce源,Na_2O_2为氧化剂,采用水热法制备纳米CeO_2粉体,并采用XRD、SEM等对样品进行物相和微观形貌分析。结果表明:随着水热反应温度的升高,CeO_2的微观形貌逐渐由棒状和小颗粒结构向中空球形转变,粒度更加均匀且逐渐长大,由很多个微小的纳米级颗粒组成。120℃反应12 h制备产品的光降解率约为76.9%,180℃反应12 h制备粉体的光降解率可达到85.7%,表明采用水热法制备的纳米CeO_2中空球对亚甲基蓝有很强的吸附能力,在较高温度(180℃)下制备的粉体由于中空球结构更加完善、粒度更加均匀而具有更强的吸附能力。
        Using Ce(NO_3)_3·6 H_2 O as Ce source and Na_2 O_2 as oxidant,nano-CeO_2 powder was prepared by hydrothermal method. The phase composition and microstructure of the samples were analyzed by XRD and SEM. The results show that with the increase of hydrothermal reaction temperature,the microstructure of CeO_2 gradually changes from rod-shaped and small particle structure to hollow sphere,with more uniform and gradually growing particle size,consisting of many small nano-sized particles. The photodegradation rate of CeO_2 powder prepared at120 ℃ for 12 h is about 76.9%,while the powder prepared at 180 ℃ for 12 h has the photodegradation rate of85.7%,indicating that nano-CeO_2 hollow spheres prepared by hydrothermal method have strong adsorption capacity for methylene blue,and powders prepared at higher temperature(180 ℃)have stronger adsorption capacity due to more perfect hollow sphere structure and more uniform particle size.

引文

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