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首页> 外文期刊>Materials Science and Engineering >Decomposition of NO in gas phase by gold nanoparticles supported on titanium dioxide synthesized by the deposition-precipitation method
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Decomposition of NO in gas phase by gold nanoparticles supported on titanium dioxide synthesized by the deposition-precipitation method

机译：沉积-沉淀法合成二氧化钛负载的金纳米颗粒在气相中分解NO

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摘要

In the present work, the synthesis, characterization and photoactivity concerning the nitrogen monoxide (NO) decomposition of sol-gel Au/TiO_2 photocatalysts are reported.TiO_2 was prepared by gelling titanium (IV) isopropoxide, and gold nanoparticles were added by the deposition-precipitation method with urea. The catalysts with different gold concentrations were characterized by the following techniques: BET, XRD, UV-vis and dark-field TEM. It was found that by using this synthesis method, a high dispersion of gold nanoparticles on TiO_2 was reached (4.4-6.7 nm), and the obtained structure lead to a band gap energy that is lower than the one observed for undoped TiO_2. A NO + O_2 mixture (150 ppm) was used to evaluate the photocatalytic activity in situ, at room temperature, under atmospheric pressure and a UV lamp was used as radiation source. The photocatalytic conversion of nitrogen monoxide (NO) was followed by FTIR, which reached 96% in 60min. The Au/TiO_2 materials showed an enhanced photocatalytic activity when compared with the reference TiO_2.
机译：本文报道了溶胶-凝胶Au / TiO_2光催化剂中一氧化氮（NO）分解的合成，表征和光活性。通过异丙醇化钛（IV）制备TiO_2，并通过沉积法添加金纳米颗粒-用尿素沉淀法。通过以下技术表征具有不同金浓度的催化剂：BET，XRD，UV-vis和暗场TEM。发现使用这种合成方法，金纳米颗粒在TiO_2上的分散度很高（4.4-6.7 nm），并且所获得的结构导致带隙能量低于未掺杂的TiO_2。使用NO + O_2混合物（150 ppm）评估室温，大气压下的原位光催化活性，并使用UV灯作为辐射源。一氧化氮（NO）的光催化转化是FTIR，在60分钟内达到96％。与参考TiO_2相比，Au / TiO_2材料显示出增强的光催化活性。

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  • 来源
    《Materials Science and Engineering》 |2010年第3期|p.13-17|共5页
  • 作者

    J. Hernandez-Fernandez; R.Zanella; A. Aguilar-Elguezabal; R.D. Arizabalo; S. Castillo; M. Moran-Pineda;

  • 作者单位

    Centro de Investigation en Materiales Avanzados, Av. Miguel de Cervantes 120, Complejo Industrial C.P. 31109, Chihuahua, Chih., Mexico Instituto Mexicano del Petroleo, Direction de Investigacion y Posgrado, Eje Central Lazaro Cardenas 152, C.P. 07730, D.F., Mexico;

    rnCentro de Ciencias Aplicadas y Desarrollo Tecnologico, UNAM, Circuito exterior S/N. Ciudad Universitaria, C.P. 04510, AP. 70-186, Delegation Coyoacan. D.F., Mexico;

    rnCentro de Investigation en Materiales Avanzados, Av. Miguel de Cervantes 120, Complejo Industrial C.P. 31109, Chihuahua, Chih., Mexico;

    rnInstituto Mexicano del Petroleo, Direction ie Investigation y Posgrado, Eje Central Lazaro Cardenas 152, C.P. 07730, D.F., Mexico;

    rnInstituto Mexicano del Petroleo, Direction ie Investigation y Posgrado, Eje Central Lazaro Cardenas 152, C.P. 07730, D.F., Mexico;

    rnInstituto Mexicano del Petroleo, Direction ie Investigation y Posgrado, Eje Central Lazaro Cardenas 152, C.P. 07730, D.F., Mexico;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    titanium dioxide; gold; deposition-precipitation; photocatalysis; nitrogen monoxide;

    机译：二氧化钛;金;沉积沉淀光催化;一氧化氮;

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