金属有机框架材料(MOFs)在气体储存、分离、分子识别、磁性和催化等领域应用广泛,引起了研究者的关注,但MOFs较差的稳定性和导电性在一定程度上限制了其应用。先以铁基有机骨架化合物(MIL-53(Fe))为牺牲模板,通过简单易控的煅烧方式制备出Fe2O3/MIL-53(Fe),然后将其与石墨烯进行复合,得到Fe2O3/MIL-53(Fe)/还原氧化石墨烯复合材料(Fe2O3/MIL-53(Fe)/rGO)。采用扫描电子显微镜(SEM)、透射电镜(TEM)、热重分析(TG)和荧光光谱分析(PL)等手段对Fe2O3/MIL-53(Fe)/rGO的形貌和结构进行了表征,并探索了其在可见光下的光催化性能。结果表明:在25℃下,可见光光照1h后,0.2g/L Fe2O3/MIL-53(Fe)/rGO可实现对10mg/L亚甲基蓝(MB)的100%降解。该光催化剂制备简单,催化效率高,且重复稳定性较好,具有良好的应用性能。
Metal-organic framework materials (MOFs) have been widely used in the fields of gas storage,separation,molecular recognition,magnetism and catalysis,garnering researchers' attention.However,the poor stability and electrical conductivity limit their application to a certain extent.In this study,Fe2O3/MIL-53(Fe) was first prepared by simple and easily controlled calcination using MIL-53(Fe) as sacrificial template,and then it was combined with graphene to obtain Fe2O3/MIL-53(Fe)/rGO composites.The morphology and structure of Fe2O3/MIL-53(Fe)/rGO were characterized by scanning electron microscopy (SEM),transmission electron microscopy (TEM),thermogravimetric analysis (TG) and fluorescence spectrum analysis (PL),and the photocatalytic performance of Fe2O3/MIL-53(Fe)/rGO under visible light was explored.The results showed that at 25℃,visible light for 1h,0.2g/L Fe2O3/MIL-53(Fe)/rGO could achieve 100% degradation of 10mg/L methylene blue (MB).The photocatalyst had the advantages of simple preparation,high catalytic efficiency,good repetition stability and notable applicability.
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基金资助
陕西省自然科学基础研究计划(2018JM2014);西安石油大学研究生创新与实践能力培养项目(YCS21212110)
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