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首页> 外文期刊>Building and Environment >Multifunctional Ag/TiO_2/MCM-41 nanocomposite film applied for indoor air treatment
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Multifunctional Ag/TiO_2/MCM-41 nanocomposite film applied for indoor air treatment

机译：多功能Ag / TiO_2 / MCM-41纳米复合膜在室内空气处理中的应用

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摘要

In this study, the indoor applications of Ag/TiO_2/MCM-41 nanocomposite films were investigated under visible light. The coatings were prepared using a microwave-assisted sol-gel method, according to the following molar ratio: 1Ti(OC_4H_9)_4:18CH_3CH_2OH:0.5C_5H_8O_2: 2H_2O: 0.2HNO_3: 0.1AgNO_3: 2SiO_2. The XRD characterisations and TEM images indicated the presence of anatase TiO_2, Ag nanoparticles and meso-porous MCM-41 within the Ag/TiO_2/MCM-41 nanocomposite films themselves. The results of UV-visible spectroscopy revealed a significant increase in both UV and visible light absorption when Ag and MCM-41 were incorporated into the TiO_2 film. The water-contact angle measurements showed that the surface of the nanocomposite film exhibited superhydrophilicity, which is a desirable property in the self-cleaning process. The application of an Ag/TiO_2/MCM-41 nanocomposite film for gaseous benzene removal was carried out in a simulated indoor air system. The photodegradation efficiencies were arranged in the order of Ag/TiO_2/MCM-41 (55%) ＞ Ag/TiO_2 (28%) ＞ TiO_2 (15%), respectively. The photo-degradation kinetics of gaseous benzene on Ag/TiO_2/MCM-41 nanocomposite films matched accordingly with the first-order model. The kinetic constants of TiO_2, Ag/TiO_2 and Ag/TiO_2/MCM-41 nanocomposite films, irradiated under visible light, were measured at 0.015, 0.025 and 0.135 h~(-1), respectively. Their degradation rates were measured at 0.273, 0.609 and 6.321 g L~(-1) h~(-1), respectively. The antimicrobial activity of the Ag/TiO_2/MCM-41 nanocomposite film against gram-negative Escherichia coli (E. coli) was evaluated under fluorescent lighting, following the JIS Z 2801:2000 standard. The percentage reductions (%R) of E. coli seeded onto TiO_2 films and Ag/TiO_2/MCM-41 nanocomposite films were measured at approximately 55% and 98%, respectively, under fluorescent lighting.
机译：本研究在可见光下研究了Ag / TiO_2 / MCM-41纳米复合薄膜在室内的应用。根据以下摩尔比，使用微波辅助溶胶-凝胶法制备涂层：1Ti（OC_4H_9）_4：18CH_3CH_2OH：0.5C_5H_8O_2：2H_2O：0.2HNO_3：0.1AgNO_3：2SiO_2。 XRD表征和TEM图像表明在Ag / TiO_2 / MCM-41纳米复合膜本身中存在锐钛矿型TiO_2，Ag纳米颗粒和中孔MCM-41。紫外可见光谱的结果表明，将Ag和MCM-41掺入TiO_2膜中后，紫外吸收和可见光吸收均显着增加。水接触角测量表明，纳米复合膜的表面表现出超亲水性，这是自清洁过程中的理想特性。在模拟的室内空气系统中，应用了Ag / TiO_2 / MCM-41纳米复合膜去除气态苯。分别以Ag / TiO_2 / MCM-41（55％）＞ Ag / TiO_2（28％）＞ TiO_2（15％）的顺序排列光降解效率。 Ag / TiO_2 / MCM-41纳米复合薄膜上气态苯的光降解动力学与一级模型相吻合。在可见光下辐照的TiO_2，Ag / TiO_2和Ag / TiO_2 / MCM-41纳米复合薄膜的动力学常数分别为0.015、0.025和0.135 h〜（-1）。它们的降解速率分别为0.273、0.609和6.321 g L〜（-1）h〜（-1）。遵循JIS Z 2801：2000标准，在荧光灯下评估了Ag / TiO_2 / MCM-41纳米复合膜对革兰氏阴性大肠杆菌（E. coli）的抗菌活性。在荧光灯下测得的接种到TiO_2薄膜和Ag / TiO_2 / MCM-41纳米复合材料薄膜上的大肠杆菌的减少百分比（％R）分别约为55％和98％。

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  • 来源
    《Building and Environment》 |2014年第12期|481-489|共9页
  • 作者

    Waraporn Tongon; Chamorn Chawengkijwanich; Siriluk Chiarakorn;

  • 作者单位

    Division of Environmental Technology, The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi,10140 Bangkok, Thailand,Center for Energy Technology and Environment, Ministry of Education, 10140 Bangkok, Thailand;

    Nanotechnology National Center, National Science and Technology Development Agency (NSTDA), 12120 Pathumthani, Thailand;

    Division of Environmental Technology, School of Energy, Environment and Materials, King Mongkut's University of Technology Thonburi, 10140 Bangkok,Thailand,Nanotec-KMUTT Center of Excellence on Hybrid Nanomaterials for Alternative Energy, King Mongkut's University of Technology Thonburi, 10140 Bangkok,Thailand;

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

    Ag/TiO_2/MCM-41; Nanocomposite film; Benzene; Antimicrobial; Indoor air treatment;

    机译：Ag / TiO_2 / MCM-41;纳米复合膜;苯;抗菌;室内空气处理;

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