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首页> 外文期刊>RSC Advances >The simultaneous removal of heavy metals and organic contaminants over a Bi2WO6/mesoporous TiO2 nanotube composite photocatalyst
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The simultaneous removal of heavy metals and organic contaminants over a Bi2WO6/mesoporous TiO2 nanotube composite photocatalyst

机译：通过Bi2wo6 /介孔TiO2纳米管复合光催化剂同时除去重金属和有机污染物

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摘要

In this study, Bi _(2) WO _(6) /mesoporous TiO _(2) nanotube composites (BWO/TNTs) were successfully synthesized to remove the heavy metal Cr( VI ) and refractory organic compound dibutyl phthalate (DBP) from contaminated water under visible light. Coupling TNTs with BWO can greatly improve the photocatalytic activity of the catalyst for treating Cr( VI )–DBP mixed pollutants because of synergetic effects from Cr( VI ) and DBP. Specifically, the visible-light photocatalytic activities of 3% BWO/TNTs for removing DBP and Cr( VI ) from mixed pollutant solutions were 10.8 and 3.8 times higher than those of BWO. Firstly, this system can take full advantage of charge carriers and can spatially separate reduction sites and oxidation sites in the photocatalyst. Secondly, TNTs has a unique multiscale channel structure that can enhance mass transfer and light utilization. These characteristics lead to very obvious photocatalytic activity improvements. In addition, the BWO/TNTs composite photocatalysts exhibited excellent stability and durability under visible and UV light irradiation. This work demonstrated a feasible method for fabricating composite photocatalysts and applied them to the simultaneous removal of heavy metal and refractory organic pollutants from contaminated water.
机译：在该研究中，Bi _（2）WO _（6）/介孔TiO _（2）成功合成纳米管复合材料（BWO / TNT）以除去重金属Cr（VI）和难氢有机化合物二丁酯（DBP）可见光下的污染水。与BWO的偶联TNT可以大大改善催化剂的光催化活性，因为从Cr（VI）和DBP的协同效应，催化剂治疗Cr（VI）-DBP混合污染物。具体地，用于从混合污染物溶液中去除DBP和Cr（VI）的3％BWO / TNT的可见光光催化活性为10.8％，比BWO高3.8倍。首先，该系统可以充分利用电荷载体，并且可以在光催化剂中空间分离的降低部位和氧化位点。其次，TNT具有独特的多尺度通道结构，可以提高质量传递和光线利用。这些特征导致非常明显的光催化活性改进。此外，BWO / TNTS复合光催化剂在可见和UV光照射下表现出优异的稳定性和耐久性。这项工作证明了一种制造复合光催化剂的可行方法，并将其施加到同时除去来自受污染的水的重金属和耐火有机污染物。

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