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首页> 外文期刊>RSC Advances >An ultrafiltration membrane with enhanced photocatalytic performance from grafted N–TiO2/graphene oxide
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An ultrafiltration membrane with enhanced photocatalytic performance from grafted N–TiO2/graphene oxide

机译：N–TiO 2 /氧化石墨烯接枝的具有增强光催化性能的超滤膜

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An enhanced photocatalytic ultrafiltration membrane was prepared by grafting with N–TiO2/graphene oxide. After N–TiO2/graphene oxide particles and a polysulfone membrane had been prepared, the N–TiO2/graphene oxide was distributed in deionized water, poured onto the membrane surface and grafted onto the membrane surface by using a pump filter. Scanning electron microscopy and atomic force microscopy were used to investigate the surface and morphological structure of the prepared membranes. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy were used to analyze the elemental compositions and chemical bonds of the membranes. The hydrophilicity of the membrane surface was investigated by a sessile-drop method. The membrane water flux was tested in an ultrafiltration cup system. Methylene blue removal under darkness, ultraviolet light and sunlight were used to characterize the photocatalytic ability. The photocatalytic membrane exhibited an enhanced photocatalytic performance, especially in sunlight rather than in ultraviolet light. The synergistic effect of photocatalysis and filtration was tested; the photocatalytic membrane exhibited a better methylene-blue removal ability than a pure membrane as the methylene blue concentration in filtered water was lower. The recyclability of the photocatalytic membrane had a great improvement compared with the powder photocatalyst.
机译：N-TiO 2 /氧化石墨烯接枝制备增强型光催化超滤膜。制备N–TiO 2 /氧化石墨烯颗粒和聚砜膜后，N–TiO 2 将氧化石墨烯分散在去离子水中，倒在膜表面上，并使用泵滤器接枝到膜表面上。扫描电子显微镜和原子力显微镜用于研究所制备膜的表面和形态结构。傅里叶变换红外光谱和X射线光电子能谱用于分析膜的元素组成和化学键。通过无滴法研究膜表面的亲水性。在超滤杯系统中测试膜的水通量。在黑暗，紫外线和阳光下去除亚​​甲基蓝用于表征光催化能力。该光催化膜表现出增强的光催化性能，特别是在阳光下而不是在紫外线下。测试了光催化和过滤的协同作用;由于滤水中亚甲基蓝的浓度较低，因此光催化膜的亚甲基蓝去除能力优于纯膜。与粉末光催化剂相比，光催化膜的可回收性有了很大的提高。

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