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Removal of ethylenediaminetetraacetic acid and its cobalt complex by layered double hydroxide/titanium dioxide from aqueous solution

机译:层状双氢氧化物/二氧化钛从水溶液中去除乙二胺四乙酸及其钴配合物

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摘要

TiO2-LDH photocatalysts as mechanical mixture (MCPC) and core-shell (CSPC) were successfully synthesized and characterized by XRD, TEM, and EDX techniques. The band gaps were determined by UV-vis diffuse reflectance. The photocatalytic efficiency of the catalysts for removal of ethylenediaminetetraacetic acid (EDTA) and its cobalt complexes (Co(II)-EDTA) was evaluated under ultraviolet (UV) irradiation. Results showed that the employed catalysts not only has higher removal efficiency for both EDTA and Co(II)-EDTA than TiO2, but also easily separated from the aqueous phase. Removal percentages of about 83 and 88% (for EDTA) and 71 and 81% (for Co(II)-EDTA) are achieved by MMPC and CSPC, respectively.
机译:通过XRD,TEM和EDX技术成功地合成并表征了以机械混合物(MCPC)和核壳(CSPC)形式存在的TiO2-LDH光催化剂。带隙是通过紫外可见漫反射确定的。在紫外线(UV)照射下评估了催化剂去除乙二胺四乙酸(EDTA)及其钴配合物(Co(​​II)-EDTA)的光催化效率。结果表明,所用催化剂不仅对EDTA和Co(II)-EDTA的去除效率均比TiO2高,而且易于与水相分离。 MMPC和CSPC的去除率分别约为83%和88%(对于EDTA)和71%和81%(对于Co(II)-EDTA)。

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