Decolorization of methylene blue by heterogeneous Fenton reaction using Fe3−xTixO4 (0 ≤ x ≤ 0.78) at neutral pH values
Decolorization of methylene blue by heterogeneous Fenton reaction using Fe3−xTixO4 (0 ≤ x ≤ 0.78) at neutral pH values
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DOI：
10.1016/j.apcatb.2009.01.012
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发表时间：
2009-07
影响因子：
22.1
通讯作者：
Shijian Yang;Hongping He;Daqing Wu;Dong Chen;Xiaoliang Liang;Zonghua Qin;Mingde Fan;Jianxi Zhu
中科院分区：
文献类型：
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作者：
Shijian Yang;Hongping He;Daqing Wu;Dong Chen;Xiaoliang Liang;Zonghua Qin;Mingde Fan;Jianxi Zhu
在这项工作中，采用一种新的软化学方法合成了一系列Fe3−xTixO4(0≤x≤0.78)。使用 X 射线衍射 (XRD)、傅里叶变换红外光谱 (FTIR)、穆斯堡尔光谱、热重和差示扫描量热 (TG-DSC) 分析对合成的 Fe3−xTixO4 进行表征。结果表明，它们为尖晶石结构，且结构中引入了Ti。然后，使用紫外可见光谱、溶解有机碳 (DOC) 和元素 C 分析，研究了在中性 pH 值下 H2O2 存在下 Fe3−xTixO4 对亚甲基蓝 (MB) 的脱色。此外，使用离子色谱（IC）、13C核磁共振波谱（NMR）、液相色谱和质谱（LC-MS）对脱色后残留在反应溶液中的降解产物进行鉴定。尽管有少量MB被矿化，但脱色后MB中的芳环被完全破坏。在 H2O2 存在下，随着 Fe3−xTixO4 中 Ti 含量的增加，Fe3−xTixO4 对 MB 的脱色显着促进，这是由于 Fe3−xTixO4 对 MB 的吸附和降解的增强。
In this work, a series of Fe3−xTixO4(0≤x≤0.78) was synthesized using a new soft chemical method. The synthetic Fe3−xTixO4were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Mössbauer spectroscopy, thermogravimetric and differential scanning calorimetry (TG–DSC) analyses. The results showed that they were spinel structures and Ti was introduced into their structures. Then, decolorization of methylene blue (MB) by Fe3−xTixO4in the presence of H2O2at neutral pH values was studied using UV–vis spectra, dissolved organic carbon (DOC) and element C analyses. Furthermore, the degradation products remained in reaction solution after the decolorization were identified using ionic chromatography (IC),13C nuclear magnetic resonance spectra (NMR), liquid chromatography and mass spectrometry (LC–MS). Although small amounts of MB were mineralized, the aromatic rings in MB were destroyed completely after the decolorization. Decolorization of MB by Fe3−xTixO4in the presence of H2O2was promoted remarkably with the increase of Ti content in Fe3−xTixO4due to the enhancement of both adsorption and degradation of MB on Fe3−xTixO4.