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首页> 外文期刊>RSC Advances >Facile route to a conducting ternary polyaniline@TiO2/GN nanocomposite for environmentally benign applications: photocatalytic degradation of pollutants and biological activity
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Facile route to a conducting ternary polyaniline@TiO2/GN nanocomposite for environmentally benign applications: photocatalytic degradation of pollutants and biological activity

机译：用于环境良性应用的TiO2 / GN纳米复合材料的进展路线：污染物和生物活性的光催化降解

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摘要

A polyaniline@TiO2/graphene (Pani@TiO2/GN) nanocomposite was prepared by the in situ oxidative polymerization of aniline in the presence of TiO2 and GN nanoparticles. The resulting Pani@TiO2/GN nanocomposite was characterized by UV-visible diffuse absorbance/reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), transmission electron microscopy, scanning electron microscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The observance of peaks of Pani, TiO2 and GN in XRD and XPS as well as the observance of TiO2 nanoparticles well distributed inside the network of the Pani and GN nanosheets from morphological characterizations suggests the successful formation of Pani@TiO2/GN nanocomposites. DRS and PL analysis showed that Pani@TiO2/GN had higher visible light absorption and a lower recombination rate than Pani@TiO2. The visible light photocatalytic activity of the Pani@TiO2/GN nanocomposite was tested for methylene blue (MB) degradation. The results revealed high photocatalytic activity, which is partly due to the sensitizing effect of Pani and the low recombination rate due to the GN electron scavenging property. The rate of MB degradation on the Pani@TiO2/GN nanocomposite was strongly dependent on the solution pH, reaction time, catalyst dose, and the initial MB concentration. The high regeneration degradation efficiency of the Pani@TiO2/GN nanocomposite showed high stability and the effectiveness of the synthesized photocatalyst. In a continuation of environmental remediation studies, Pani@TiO2/GN revealed high antibacterial activity towards Escherichia coli and Enterobacter ludwigii, highlighting its potential as a photocatalyst with antibacterial properties for different industrial and medical purposes.
机译：通过在TiO 2和GN纳米颗粒存在下，通过原位氧化聚合制备聚苯胺@ TiO 2 /石墨烯（Pani @ TiO 2 / Gn）纳米复合材料。所得PANI @ TiO 2 / GN纳米复合材料的特征在于UV可见漫射吸光度/反射光谱（DRS），光致发光光谱（PL），透射电子显微镜，扫描电子显微镜，X射线衍射（XRD）和X射线光电子谱（XPS）。从形态学表征中遵守XRD和XPS中PANI，TiO2和GN的峰值以及分布在PANI网络网络内的TiO2纳米颗粒的垂直表明PANI @ TiO2 / GN纳米复合材料的成功形成。 DRS和PL分析显示PANI @ TiO2 / GN具有比PANI @ TiO2更高的可见光吸收和较低的重组率。帕尼@ TiO2 / GN纳米复合材料的可见光光催化活性用于亚甲基蓝（MB）降解。结果揭示了高光催化活性，部分是由于PANI和由于GN电子清除性能引起的敏化效果和低复合率的敏化。 PANI @ TiO2 / GN纳米复合材料上的MB降解的速率强烈取决于溶液pH，反应时间，催化剂剂量和初始MB浓度。 PANI @ TiO2 / GN纳米复合材料的高再生降解效率显示出高稳定性和合成光催化剂的有效性。在环境修复研究的延续中，Pani @ TiO2 / GN揭示了对大肠杆菌和肠杆菌的高抗菌活性，突出了其作为具有不同工业和医学目的的抗菌性能的光催化剂的潜力。

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  • 来源
    《RSC Advances》 |2016年第112期|共10页
  • 作者

    Kumar Rajeev; Ansari Mohammad Omaish; Parveen Nazish; Oves Mohammad; Barakat M. A.; Alshahri Ahmed; Khan Mohd. Yusuf; Cho Moo Hwan;

  • 作者单位

    King Abdulaziz Univ Fac Meteorol Environm &

    Arid Land Agr Dept Environm Sci Jeddah 21589 Saudi Arabia;

    King Abdulaziz Univ Ctr Nanotechnol Jeddah 21589 Saudi Arabia;

    Yeungnam Univ Sch Chem Engn Gyongsan 712749 Gyeongbuk South Korea;

    King Abdulaziz Univ Ctr Excellence Environm Studies Jeddah 21589 Saudi Arabia;

    King Abdulaziz Univ Fac Meteorol Environm &

    Arid Land Agr Dept Environm Sci Jeddah 21589 Saudi Arabia;

    King Abdulaziz Univ Ctr Nanotechnol Jeddah 21589 Saudi Arabia;

    King Fahd Univ Petr &

    Minerals Ctr Excellence Nanotechnol CENT Dhahran 31261 Saudi Arabia;

    Yeungnam Univ Sch Chem Engn Gyongsan 712749 Gyeongbuk South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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