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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。
In order to obtain the visible light response of the energy storage photocatalytic material, K4Ce2Ta10-xNbxO30-WO3 (x = 0, 10, 10) was prepared from the tungstate solution obtained by ion exchange and the visible light-responsive photocatalyst K4Ce2Ta10-xNbxO30 5,10) composite photocatalyst. The physical and chemical properties of the materials were characterized by XRD, TEM, BET and UV-V is. The electrochemical properties and electrochemical performance of the materials were characterized by electrochemical methods and antibacterial experiments. The photocatalytic properties of K4Ce2Ta10-xNbxO30 band structures were analyzed and studied. Effect of energy storage and its mechanism. The results show that rare earth element Ce contributes to the modulation of the energy band structure of K4Ce2Ta10-xNbxO30, which makes the K4Ce2Ta10-xNbxO30-WO3 composite photocatalyst have visible light energy storage characteristics and shows some energy storage and antimicrobial effects in darkness. The energy storage performance of the material is affected by the Nb content and the conduction band position of K4Ce2Ta10-xNbxO30: With the increase of Nb content, the photogenerated electron reduction ability decreases, resulting in a decrease of energy storage performance.