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亚铁盐制备高结晶度MIL-100(Fe)纳米材料及其光降解有机染料性能
刘湘粤, 张宇, 王晨, 毛会玲, 杜嬛, 程琥, 庄金亮
材料工程 ›› 2018, Vol. 46 ›› Issue (10) : 127-134.
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亚铁盐制备高结晶度MIL-100(Fe)纳米材料及其光降解有机染料性能
Highly Crystalline MIL-100 (Fe) Nanoparticles Prepared from Ferrous Salts and Applications in Photodegradation of Organic Dyes
({{custom_author.role_en}}), {{javascript:window.custom_author_en_index++;}}为了高效、低成本合成光催化性能优异MOFs纳米颗粒，首先将均苯三甲酸与氢氧化钠反应制备均苯三甲酸三钠盐水溶液，之后与亚铁盐（氯化亚铁和醋酸亚铁）水溶液在室温下搅拌24h，合成高结晶度和高稳定性的MIL-100（Fe）纳米颗粒。采用X射线衍射仪、扫描电子显微镜、紫外-可见漫反射光谱仪、紫外-可见分光光度计等对MIL-100（Fe）纳米颗粒的晶体结构、形貌、光吸收和光催化性能进行测试表征，结果表明在紫外光照射下，MIL-100（Fe）/H2O2体系具有优异的光催化降解罗丹明B和甲基橙等有机染料性能。
In order to prepare highly crystalline and stable metal-organic frameworks (MOFs) nanoparticles in a straightforward and low cost method, trimesic acid was depronated by three equivalent NaOH in water, and mixed with ferrous salts (e.g. FeCl2 and Fe(OAc)) solution under vigorous stirring for 24h at room temperature. The morphology and photocatalytic activity of the obtained MIL-100(Fe) nanoparticles were fully characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) and UV-Vis spectroscopy. The results demonstrate that the MIL-100(Fe) nanoparticles exhibit excellent photocatalytic performance toward high concentrated Rhodamine B (RhB) and methyl orange (MO) organic dyes in the presence of H2O2 as a co-catalyst under UV light irradiation.
金属-有机框架材料 / 光催化 / 有机染料分子降解 / 绿色化学 {{custom_keyword}} /
metal-organic framework / photocatalysis / organic dye degradation / green chemistry {{custom_keyword}} /
图 4 MIL-100(Fe)纳米颗粒光催化降解罗丹明B和甲基橙性能图(1)RhB; (2)MO (a)不同光降解时间的紫外-可见吸收光谱图; (b)不同条件光降解效率曲线; (c)不同时间光降解浓度变化照片 Fig.4 Photocatalytic activity of MIL-100(Fe)Cl toward RhB and MO (1)RhB; (2)MO (a)UV-Vis spectra at different radiation time; (b) photocatalytic curves under various conditions; (c) pictures at different radiation time |
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图 1 MIL-100(Fe)晶体孔道结构图(a)和不同Fe(Ⅱ)盐、不同时间合成的MIL-100(Fe)纳米颗粒粉末XRD谱图(b)图 2 不同原料和不同时间合成的MIL-100(Fe)纳米颗粒SEM图图 3 MIL-100(Fe)光吸收性能图图 4 MIL-100(Fe)纳米颗粒光催化降解罗丹明B和甲基橙性能图图 5 MIL-100(Fe)Cl纳米颗粒循环催化性能图(a)、使用前后XRD对比谱图(b)和光催化5次后SEM图(c)图 6 MIL-100(Fe)光催化降解有机染料机理示意图/
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