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首页> 外文期刊>Journal of Applied Polymer Science >Novel floating photocatalysts based on polyurethane composite foams modified with silver/titanium dioxide/graphene ternary nanoparticles for the visible-light-mediated remediation of diesel-polluted surface water
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Novel floating photocatalysts based on polyurethane composite foams modified with silver/titanium dioxide/graphene ternary nanoparticles for the visible-light-mediated remediation of diesel-polluted surface water

机译：基于银/二氧化钛/石墨烯三元纳米粒子改性的聚氨酯复合泡沫的新型漂浮光催化剂，用于可见光介导的柴油污染地表水的修复

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Photocatalyst loading on a floating substitute is accepted as a promising method for the remediation of diesel-polluted surface water. Therefore, novel photocatalysts based on polyurethane foams modified with silver/titanium dioxide/graphene ternary nanoparticles (PU-Ag/P25/G) were synthesized and investigated. Scanning electron microscopy, energy-dispersive X-ray spectrometry, X-ray diffraction, Fourier transform infrared spectroscopy, and UV-visible spectroscopy showed the coexistence of Ag, Degussa P25 (P25), and graphene and the nanoscale dispersion of nanoparticles in the matrix and on the surface of the polyurethane (PU) foam. The diesel adsorption capacity of the photocatalyst reached 96 g/g. The maximum diesel degradation was found to be 76% in a period of 16 h. Compared with polyurethane-foam-supported P25/graphene (PU-P25/G) and polyurethane-foam-supported P25 (PU-P25), all of the adsorption isotherm and degradation kinetics followed the order PU-Ag/P25/G>PU-P25/G>PU-P25>PU; this was due to the loading of different nanoparticles. Moreover, the degradation efficiency was reduced only 5% after five consecutive reactions; this showed good stability and reusability of the photocatalyst for surface water restoration. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43400.
机译：将光催化剂负载在漂浮的替代物上被认为是修复柴油污染的地表水的一种有前途的方法。因此，合成并研究了基于用银/二氧化钛/石墨烯三元纳米粒子（PU-Ag / P25 / G）改性的聚氨酯泡沫的新型光催化剂。扫描电子显微镜，能量色散X射线光谱法，X射线衍射，傅里叶变换红外光谱法和紫外可见光谱法表明，Ag，Degussa P25（P25）和石墨烯共存，纳米粒子在基质中的纳米级分散并在聚氨酯（PU）泡沫的表面上。光催化剂的柴油吸附容量达到96g / g。发现在16小时内最大柴油降解率为76％。与聚氨酯泡沫支撑的P25 /石墨烯（PU-P25 / G）和聚氨酯泡沫支撑的P25（PU-P25）相比，所有吸附等温线和降解动力学均遵循PU-Ag / P25 / G> PU的顺序-P25 / G> PU-P25> PU;这是由于装载了不同的纳米颗粒。而且，连续五个反应后降解效率仅降低了5％。这表明用于表面水修复的光催化剂具有良好的稳定性和可重复使用性。 （c）2016 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，133，43400。

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