Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第24卷    第11期    总第188期    2014年11月

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文章编号:1004-0609(2014)11-2827-09
可见光响应型Cu-Ti-O纳米管阵列的阳极氧化制备及表征
马 清1,陈建军1,刘绍军2,檀满林1,符冬菊1,程立金2

(1. 深圳清华大学研究院 低碳能源与节能技术重点实验室,深圳 518057;
2. 中南大学 粉末冶金国家重点实验室,长沙 410083
)

摘 要: 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。

 

关键字: Cu-Ti-O纳米管;Cu-Ti合金;阳极氧化;可见光响应

Preparation and characterization of visible-light-sensitive anodic Cu-Ti-O nanotube arrays
MA Qing1, CHEN Jian-jun1, LIU Shao-jun2, TAN Man-lin1, FU Dong-ju1, CHENG Li-jin2

1. Key Laboratory of Low-carbon Energy and Energy-saving Technology,
Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China;
2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Abstract: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.

 

Key words: Cu-Ti-O nanotube; Cu-Ti alloy; anodization; visible-light-sensitive

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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