CAJ | 학술논문

通过阳极氧化在Cu30Ti70合金基体上制备出高度有序的Cu掺杂Cu-Ti-O纳米管阵列，并讨论了阳极氧化时间对Cu-Ti-O纳米管阵列形貌和结构影响。结果表明：在O2气氛中450℃退火晶化2 h后，Cu-Ti-O纳米管阵列在400~650 nm波长范围内表现出较强的可见光响应性能，其本征吸收带边和可见光吸收带边最大值分别红移至470 nm和760 nm；Cu掺杂后形成的氧空位促进了Cu-Ti-O纳米管锐钛矿向金红石相的转变；随着阳极氧化时间的延长，Cu-Ti-O纳米管阵列长度增加，管壁厚度减薄，且在O2气氛中450℃退火2 h后，金红石相转变量增加。
통과양겁양화재Cu30Ti70합금기체상제비출고도유서적Cu참잡Cu-Ti-O납미관진렬，병토론료양겁양화시간대Cu-Ti-O납미관진렬형모화결구영향。결과표명：재O2기분중450℃퇴화정화2 h후，Cu-Ti-O납미관진렬재400~650 nm파장범위내표현출교강적가견광향응성능，기본정흡수대변화가견광흡수대변최대치분별홍이지470 nm화760 nm；Cu참잡후형성적양공위촉진료Cu-Ti-O납미관예태광향금홍석상적전변；수착양겁양화시간적연장，Cu-Ti-O납미관진렬장도증가，관벽후도감박，차재O2기분중450℃퇴화2 h후，금홍석상전변량증가。
Well organized Cu-Ti-O nanotube arrays with enhanced visible light response were prepared on Cu30Ti70 alloy substrate by anodization. The influences of anodization time on the morphology, crystalline structure and photocatalytic activity of Cu-Ti-O nanotube arrays were further investigated. The results show that the stronger visible-light-sensitive care observed at the wavelength of 400?650 nm, the intrinsic and visible light absorption edge are red shift to about 470 nm and 760 nm, respectively. The oxygen vacancies induced by the high concentration Cu dopant into the Cu-Ti-O nanotube play a favorable role in determining anatase to rutile phase transformation. With prolonging anodization time, the Cu-Ti-O nanotube length increases while the wall thickness decreases as well as rutile phase transformation increasing after crystallization in O2 annealing at 450℃for 2 h.