Surfactant-Free Solvothermal Synthesis of 3D Flowerlike Iron Alkoxide (Fe-EG) Micro/Nanostructures: Structure, Formation Mechanism, and Fenton Oxidation of Azo Dyes
Surfactant-Free Solvothermal Synthesis of 3D Flowerlike Iron Alkoxide (Fe-EG) Micro/Nanostructures: Structure, Formation Mechanism, and Fenton Oxidation of Azo Dyes
复制标题
无表面活性剂溶剂热合成3D花状醇铁(Fe-EG)微/纳米结构：偶氮染料的结构、形成机制和芬顿氧化
DOI：
10.1021/acs.iecr.7b02826
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发表时间：
2017-10-18
影响因子：
4.2
通讯作者：
Zhang, Hui
中科院分区：
文献类型：
--
作者：
Fan, Ting;Li, Yangguang;Zhang, Hui
以乙酸钠中心点3 H（2）O为碱源，采用无表面活性剂的溶剂热法首次制备了三维花状铁醇盐（Fe-EG）微/纳米结构，并对其进行了系统表征.绿色的3D花状Fe-EG微米/纳米结构是聚合的乙醇酸亚铁，化学式为[Fe，（OCH 2CH 2 O）（2）（HOCH 2CH 2 OH）（2）]（n]）。在准原位监测的形态和组成的样品收集在不同的反应时间，一个配位/配体ebstitution/还原/聚合机制的Fe-EG初步提出。Fe-EG微米/纳米结构在pH（0）= 6.0下，以H2 O2作为氧化剂，在40 min内表现出与99.7%的酸性橙子7（AO 7）降解效率相似的降解效率。认为Fe-EG的适度界面水解过程使Fe 3+在原位形成的具有大比表面积和丰富多孔结构的三维花状无定形FeOOH表面高度分散，有利于染料分子的吸附和羟基自由基的形成。
A three-dimensional (3D) flowerlike iron alkoxide (Fe-EG) micro/nanostructure has been fabricated for the first time via a facile surfactant-free solvothermal method using CH3COONa center dot 3H(2)O as the alkali source and systematically characterized. The green-colored 3D flowerlike Fe-EG micro/nanostructure is a polymeric ferrous glycolate with the chemical formula [Fe,(OCH2CH2O)(2)(HOCH2CH2OH)(2)](n]). Upon quasi-in situ monitoring of the morphology and composition of the samples collected at various reaction times, a coordination/ligand ebstitution/reduction/polymerization mechanism for Fe-EG is tentatively proposed. The Fe-EG micro/nanostructure exhibited similar to 99.7% Acid Orange 7 (AO7) degradation efficiency in 40 min with H2O2 as the oxidant at pH(0) = 6.0. It is believed that the high dispersion of a large amount of Fe3+ on the surface of in situ-formed 3D flowerlike amorphous FeOOH with a large surface area and rich porous structure by the moderate interfacial hydrolysis process of Fe-EG benefits the adsorption of dye molecules and the formation of hydroxyl radicals.