| K_4Ce_2Ta_(10-x)Nb_xO_(30)-WO_3复合物的光催化储能特性 |
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| 引用本文： | 曹铃林,陈铭夏,田蒙奎,袁坚,上官文峰.K_4Ce_2Ta_(10-x)Nb_xO_(30)-WO_3复合物的光催化储能特性[J].中国稀土学报,2011,29(3). |
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| 作者姓名： | 曹铃林 陈铭夏 田蒙奎 袁坚 上官文峰 |
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| 作者单位： | 上海交通大学机械与动力学院燃烧与环境技术研究中心,上海,200240 |
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| 基金项目： | 国家863项目(2010AA064907)资助 |
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| 摘 要： | 为获得可见光响应的储能光催化材料,以离子交换法获得的钨酸溶液与可见光响应光催化剂K4Ce2Ta10-xNbxO30(x=0,5,10)为原料,制备了K4Ce2Ta10-xNbxO30-WO3(x=0,5,10)复合光催化剂。采用XRD,TEM,BET,UV-V is等方法表征了材料的物理化学特性,通过电化学方法和抗菌实验对其储能特性进行表征,分析和研究了K4Ce2Ta10-xNbxO30能带结构对其光催化储能效应的影响及作用机制。研究结果表明,稀土元素Ce贡献于K4Ce2Ta10-xNbxO30能带结构的调变,使得K4Ce2Ta10-xNbxO30-WO3复合光催化材料具有可见光储能特性,在黑暗中也显示出一定的储能抗菌效应。该材料的储能性能受Nb含量和K4Ce2Ta10-xNbxO30的导带位置的影响:随着Nb含量的增加,光生电子还原能力下降,导致储能性能降低。
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| 关 键 词： | 光催化 储能 能带结构 K4Ce2Ta10-xNbxO30 WO3 稀土 |
Photocatalytic Energy Storage Ability of K_4Ce_2Ta_(10-x)Nb_xO_(30)-WO_3 |
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| Cao Linglin,Chen Mingxia,Tian Mengkui,Yuan Jian,Shangguan Wenfeng.Photocatalytic Energy Storage Ability of K_4Ce_2Ta_(10-x)Nb_xO_(30)-WO_3[J].Journal of the Chinese Rare Earth Society,2011,29(3). |
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| Authors: | Cao Linglin Chen Mingxia Tian Mengkui Yuan Jian Shangguan Wenfeng |
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| Institution: | Cao Linglin,Chen Mingxia,Tian Mengkui,Yuan Jian,Shangguan Wenfeng(Research Center for Combustion and Environmental Technology,School of Mechanical and Power Engineering,Shanghai Jiaotong University,Shanghai 200240,China) |
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| Abstract: | To obtain visible-driven energy storage photocatalyst,K4Ce2Ta10-xNbxO30-WO3 powder was made from visible-light driven photocatalysts K4Ce2Ta10-xNbxO30 and soluble tungstic acid which were separately prepared with high temperature solid-state reactions and cation-exchange technique.The energy storage behavior of K4Ce2Ta10-xNbxO30-WO3 composite photocatalyst under full-band spectrum and visible light was characterized by electrochemical galvanostatic method.It turned out that K4Ce2Ta10-xNbxO30-WO3 composite h... |
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| Keywords: | photocatalysis energy storage band structure K4Ce2Ta10-xNbxO30 WO3 rare earths |
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