【作者】 沈昱； 吴艳波； 李新勇；

【Author】 Yu Shen;YB Wu;XY Li;School of Environmental and Chemical Engineering,Dalian Jiaotong University;School of Environmental Science and Technology,Dalian University of Technology;

【机构】 大连交通大学环境与化学工程学院； 大连理工大学环境学院；

【摘要】 利用一步溶剂热法成功合成了MnFe₂O₄纳米空心球。XRD和SEM分析表明,所制备的MnFe₂O₄纳米球直径约为300 nm,TEM表征可以进一步证实其中空结构。红外光谱表征了该产品所含的化学键,DRS分析表明其在紫外-可见光谱区具有明显的光吸收能力,禁带宽度约为1.61 eV。在可见光照射下,气相苯在MnFe₂O₄纳米空心球催化剂上能被有效降解。采用原位红外光谱技术,检测出乙酸乙酯、羧酸、醛、乙炔为反应的中间产物,二氧化碳为最终矿化产物。这项研究为设计和制备球形纳米功能材料提供了新的思路,制备出的催化剂对大气中有机污染物表现出优异的处理能力。更多还原

【Abstract】 MnFe₂O₄ hollow nanospheres were successfully fabricated via a facile one-pot solvothermal method. XRD and SEM analysis revealed that the prepared nanospheres had a uniform diameter of about 300 nm, and the hollow structure could be further confirmed by TEM. FTIR were also applied to characterize the chemical bonds in the hollow nanospheres. The product shows an obvious absorption capability in the UV-Vis region and the band-gap energy is about 1.61 eV. Benzene can be effectively degradated on the MnFe₂O₄ nanospheres irradiated with visible light. By using in situ FTIR technique, ethyl acetate, carboxylic acid, aldehyde and acetylene could be regarded as the intermediate products, and CO₂ was produced as the final mineralization product during the reaction process.更多还原