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Tantalum (oxy)nitrides nanotube arrays for the degradation of atrazine in vis-Fenton-like process

机译：钽（氧）氮化物纳米管阵列，用于在类似于Fenton的过程中降解of去津

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摘要

In order to overcome the limitation of the application of nanoparticles, tantalum (oxy)nitrides nanotube arrays on a Ta foil were synthesized and introduced in vis (visible light)-Fenton-like system to enhance the degradation of atrazine. At first, the anodization of tantalum foil in a mild electrolyte solution containing ethylene glycol and water (v:v=2:l) plus 0.5wt.% NH_4F produced tantala nanotubes with an average diameter of 30 nm and a length of approximately 1 μm. Then the nitridation of tantala nanotube arrays resulted in the replacement of N atoms to O atoms to form tantalum (oxy)nitrides (TaON and Ta_3N_5), as testified by XRD and XPS analyses. The synthesized tantalum (oxy)nitrides nanotubes absorb well in the visible region up to 600 nm. Under visible light, tantalum (oxy)nitrides nanotube arrays were catalytically active for Fe~(3+) reduction. With tantalum (oxy)nitrides nanotube arrays, the degradation of atrazine and the formation of the intermediates in vis/Fe~(3+)/H_2O_2 system were significantly accelerated. This was explained by the higher concentration of Fe~(2+) and thus the faster decomposition of H_2O_2 with tantalum (oxy)nitrides nanotubes. In addition, tantalum (oxy)nitrides nanotubes exhibited stable performance during atrazine degradation for three runs. The good performance and stability of the tantalum (oxy)nitrides nanotubes film with the convenient separation, suggest that this film is a promising catalyst for vis-Fenton-like degradation.
机译：为了克服纳米颗粒应用的局限性，在钽箔上合成了钽（氧）氮化物纳米管阵列，并将其引入（可见光）-芬顿样体系中，以增强阿特拉津的降解。首先，在含有乙二醇和水（v：v = 2：l）和0.5wt。％NH_4F的温和电解质溶液中对钽箔进行阳极氧化，制得的坦塔拉纳米管平均直径为30 nm，长度约为1μm 。然后通过XRD和XPS分析证明，塔塔拉纳米管阵列的氮化作用将N原子替换为O原子，从而形成钽（氧）氮化物（TaON和Ta_3N_5）。合成的（氧）氮化钽纳米管在高达600 nm的可见光区吸收良好。在可见光下，（氧）氮化钽纳米管阵列具有催化Fe〜（3+）还原的活性。使用钽（氧）氮化物纳米管阵列，可显着加速vis / Fe〜（3 +）/ H_2O_2体系中of去津的降解和中间体的形成。 Fe〜（2+）的浓度较高可以解释这一点，因此H_2O_2可以被氮化钽（纳米管）更快地分解。此外，钽（氧）氮化物纳米管在阿特拉津降解过程中表现出了三段稳定的性能。氮化（氧）氮化物纳米管薄膜具有良好的性能和稳定性，且具有方便的分离性，这表明该薄膜是一种有前途的类似芬顿降解的催化剂。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第30期|p.21-27|共7页
  • 作者

    Yingxun Du; Lu Zhao; Yuguang Chang; Yaling Su;

  • 作者单位

    Nanjing Institute of Geography and Limnology, State Key Laboratory of Lake Science and Environment, Chinese Academy of Sciences, Nanjing 210008. China;

    Nanjing Institute of Geography and Limnology, State Key Laboratory of Lake Science and Environment, Chinese Academy of Sciences, Nanjing 210008. China;

    School of Biochemical and Environmental Engineering, Nanjing Xiaozhuang Univeristy, Nanjing 211171, China;

    Nanjing Institute of Geography and Limnology, State Key Laboratory of Lake Science and Environment, Chinese Academy of Sciences, Nanjing 210008, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    tantalum (oxy)nitrides nanotubes; fenton-like; Fe~(3+) reduction; visible light; atrazine degradation;

    机译：钽（氧）氮化物纳米管;芬顿状Fe〜（3+）还原;可见光;阿特拉津降解;

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