| 新型Au/TiO_2纳米管的制备及其在化学需氧量测定中的应用研究 |
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| 引用本文： | 梁琳红,张中海,袁园,曾立平,金利通.新型Au/TiO_2纳米管的制备及其在化学需氧量测定中的应用研究[J].化学传感器,2008,28(2). |
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| 作者姓名： | 梁琳红 张中海 袁园 曾立平 金利通 |
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| 作者单位： | 华东师范大学化学系,上海,200062 |
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| 摘 要： | 该文首次用光电催化的方法,在TiO2纳米管中嵌入金纳米粒子,新材料可以促进界面间电子的传递,有助于电子和空穴对的分离,进而提高光催化效率.对Au/TiO2纳米管进行扫描电子显微镜(SEM),色散型X射线能谱(EDX)和X射线衍射(XRD)表征,结果表明金纳米粒子被成功嵌入TiO2纳米管中,形成蜂窝状结构.将该材料首次用于光电催化法化学需氧量(COD)的测定,发现该传感器的光电流值在1～800mg/L范围内与COD值有良好的线性响应,检测限为0.3 mg/L.利用该传感器测定实际水样的COD值,结果与传统的K2Cr2O7标准方法有较好的一致性.
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| 关 键 词： | Au/TiO2纳米管 光电催化 化学需氧量(COD) 光电流 |
Preparation of novel Au/TiO_2 nanotube and its application in the detection of chemical oxygen demand |
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| Liang Lin-hong,Zhang Zhong-hai,Yuan Yuan,Zeng Li-ping,Jin Li-tong.Preparation of novel Au/TiO_2 nanotube and its application in the detection of chemical oxygen demand[J].Chemical Sensors,2008,28(2). |
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| Authors: | Liang Lin-hong Zhang Zhong-hai Yuan Yuan Zeng Li-ping Jin Li-tong |
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| Affiliation: | Liang Lin-hong,Zhang Zhong-hai,Yuan Yuan,Zeng Li-ping,Jin Li-tong (Department of Chemistry,East China Normal University,Shanghai 200062,Chin a) |
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| Abstract: | A new method for fabrication of Au/TiO_2 nanotube using photoelectrocatalysis was described. The Au/TiO_2 nanotube promoted the transfer of interfacial electrons and facilitated the separation of electronhole (eh+ ) pair, then showed higher photocatalytic efficiency compared to the single TiO2 nanotube. XRD, EDX and SEM techniques had been used to characterize the Au/TiO_2 nanotube arrays. It was showed that Au nanoparticles were successfully encapsulated into highly ordered TiO2 nanotube and thus formed th... |
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| Keywords: | Au/TiO_2 nanotube photoelectrocatalytic chemical oxygen de mand(COD) photocurrent |
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