| TiO2纳米管阵列光电催化氧化处理氨氮废水 |
| Photo-electro Catalytic Oxidation of Ammonia Nitrogen Wastewater on TiO2 Nanotube Arrays |
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| 摘要: 用电化学阳极氧化法制备了高度有序的钛基二氧化钛纳米管阵列薄膜。用场发射扫描电镜(FE-SEM)、X射线衍射(XRD)表征样品的形貌与晶型特征。以二氧化钛纳米管阵列为光阳极，石墨为对电极，测试了不同pH值和外加偏压条件下的光电流响应和光电催化氧化降解NH4Cl水溶液(以N计，100 mg·L-1)的效率。结果表明：所制备的TiO2纳米管阵列具有锐钛矿和金红石的混晶结构，且主要晶型为锐钛矿。光电流响应的强弱与光电催化氧化效率的高低相对应，降解氨氮废水的最佳条件为pH=11，偏压为1.0 V。 |
| 关键词: TiO2纳米管阵列 光电催化氧化 光电流响应 氨氮废水 |
| 基金项目: |
| Abstract: Highly ordered TiO2 nanotube arrays on titanium substrate were prepared by electrochemical anodization. Field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) were used to characterize the morphology and crystal form of the samples. Photo current response and photo-electro catalytic oxidation efficiency of ammonium chloride aqueous solution were evaluated with nitrogen content of 100 mg·L-1 at various pH values and applied voltages, using TiO2 nanotube arrays as a photo anode and graphite as a counter electrode. The results show that the as-prepared TiO2 nanotube arrays possess co-crystal structure with rutile and anatase phases, mainly anatase phase. Strong photo current response corresponds to high photo-electro catalytic oxidation efficiency, and weak response to low efficiency. The optimum conditions for ammonia nitrogen wastewater decomposition are pH value of 11 and applied voltage of 1.0 V. |
| Keywords: TiO2 nanotube array photo-electric oxidation photo current response ammonia nitrogen |
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| 李丹丹,刘中清,颜 欣,郑 剑,刘 旭.TiO2纳米管阵列光电催化氧化处理氨氮废水[J].无机化学学报,2011,27(7):1358-1362. |
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