水热法合成棒束状纳米CeO2粉体及其催化性能
Hydrothermal Method Synthesization and Catalytic Performance of Cluster-like CeO2 Nano-powders
摘 要
在醇-水体系中以P123为模板、硝酸铈和草酸为原料, 利用水热法制备了棒束状纳米CeO2粉体, 研究了反应温度、硝酸铈与草酸的物质的量比(nCH)、溶液pH以及反应时间对CeO2粉体颗粒的影响, 确定了制备棒束状纳米CeO2粉体的最佳工艺参数; 将最佳工艺参数下制得的CeO2对酸性品红溶液进行催化降解试验, 并与块状CeO2催化降解结果进行对比。结果表明: 制备棒束状纳米CeO2的最佳工艺参数为200 ℃、nCH=2∶3、pH=1、反应时间360 min; 在此最佳工艺参数下制备的棒束状纳米CeO2对酸性品红溶液的催化活性比普通块状CeO2的大大提高。
水热法
棒束状结构
纳米氧化铈
catalytic performance
hydrothermal method
cluster-like structure
nano-CeO2
Abstract
Cluster-like CeO2 nanopowders were prepared by hydrothermal method in mixed alcohol-water solvents with Ce(NO3)3·6H2O and C2H2O4·2H2O as raw materials and triblock copolymers P123 as template. The effects of hydrothermal reaction temperature, ratio of cerium nitrate to oxalic acid (nCH), pH of solution and reaction time on CeO2 powders were studied to obtain the optimum synthesis parameters for synthesizing cluster-like CeO2 nano-powders. The catalytic degradation experiment of CeO2 prepared by the optimum parameters was carried out in acid fuchsin solution, and the degradation results were compared with the results of bulk CeO2. The results show that the optimum parameters for synthesizing cluster-like nano-powders can be summarized as follows: hydrothermal reaction temperature of 200 ℃, nCH of 2∶3, solution pH of 1 and reaction time of 360 min. Compared with bulk CeO2, the catalytic performance in scid fuchsin solution for the cluster-like CeO2 prepared using these optimum parameters increased greatly.
中图分类号 O611.4
所属栏目 纳米材料
基金项目 国家自然科学基金资助项目(21071107, 21277094, 21103119, No.856); 苏州科技学院校青年基金资助项目(XKQ201213)
收稿日期 2013/3/15
修改稿日期 2014/1/10
网络出版日期
作者单位点击查看
备注陈丰(1981-), 男, 江苏昆山人, 讲师, 博士研究生。
引用该论文: CHEN Feng,CHEN Zhi-gang,MA Juan-ning,QIAN Jun-chao,WANG Meng-meng,LU Qiu-yue. Hydrothermal Method Synthesization and Catalytic Performance of Cluster-like CeO2 Nano-powders[J]. Materials for mechancial engineering, 2014, 38(6): 89～94
陈丰,陈志刚,马娟宁,钱君超,王盟盟,陆秋月. 水热法合成棒束状纳米CeO2粉体及其催化性能[J]. 机械工程材料, 2014, 38(6): 89～94
被引情况:
【1】陈志刚,刘灿斌,钱君超,张凯, "仿生CuO-CeO2复合材料低温选择性催化还原脱硝性能",机械工程材料 40, 73-77(2016)
【2】赵明娟,李 深,赵龙志,张 坚, "不同方法制备负热膨胀特性ZrV2O7粉体",机械工程材料 40, 1-5(2016)
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【5】ZHANG D S, PAN C S, SHI L Y, et al. A highly reactive catalyst for CO oxidation: CeO2 nanotubes synthesized using carbon nanotubes as removable templates［J］.Micropor Mesopor Mater,2009,117(1/2):193-200.
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【8】LI X Z, CHEN F, LU X W, et al. Modified-EISA synthesis of mesoporous high surface area CeO2 and catalytic property for CO oxidation［J］.J Rare Earths,2009,27(6):943-947.
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【11】CUI Q Z, DONG X T, WANG J X, et al. Direct fabrication of cerium oxide hollow nanofibers by electrospinning［J］.J Rare Earths,2008,26(5):664-669.
【12】YANG X H, SHAO C L, LIU Y C, et al. Nanofibers of CeO2 via an electrospinning technique［J］.Thin Solid Films,2005,478(1/2):228-231.
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【15】栾宝平, 余锡宾, 刘洁, 等.不同形貌的CeO2的水热法制备及表征［J］.上海师范大学学报: 自然科学版, 2011,40(2): 157-162.
【16】位忠斌, 崔育倩, 郭培志, 等.二氧化铈八面体的水热合成与表征［J］.无机化学学报, 2011,27(7):1399-1404.
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