多级结构α-MoO_(3)空心微球的构筑及其对有机染料的吸附性能  

Construction of Hierarchical α-MoO_(3) Hollow Microspheres and Its High Adsorption Performance towards Organic Dyes

作　　者：隋丽丽[1] 王润 赵丹 申书昌[1] 孙立[1] 徐英明[2] 程晓丽[2] 霍丽华[2] SUI Li-Li;WANG Run;ZHAO Dan;SHEN Shu-Chang;SUN Li;XU Ying-Ming;CHENG Xiao-Li;HUO Li-Hua(School of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,China;Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education,School of Chemistry and Materials Science,Heilongjiang University,Harbin 150080,China)

机构地区：[1]齐齐哈尔大学化学与化学工程学院,齐齐哈尔161006 [2]黑龙江大学化学化工与材料学院功能无机材料化学教育部重点实验室,哈尔滨150080

出　　处：《无机材料学报》2019年第2期193-200,共8页Journal of Inorganic Materials

基　　金：国家自然科学基金(21771060,51802167);黑龙江省青年科学基金(QC2018015);黑龙江省教育厅资助项目(135109206,135209221);黑龙江省普通本科高等学校青年人才培养计划(UNPYSCT-2016088)

摘　　要：具有多级结构的半导体金属氧化物,其特有的立体空间结构使材料具有超高活性,在吸附领域具有应用潜力。研究采用简单的一步溶剂热法制备了空心球状的MoO_2前驱体,400℃热处理后得到多级结构α-MoO_3空心微球。空心球的直径为600～800 nm,由宽度约70 nm的纳米棒构筑而成。该球状α-MoO_3纳米材料对亚甲基蓝(MB)染料具有优良的吸附性能。当α-MoO_3吸附剂用量为0.5 g/L、MB染料浓度为20 mg/L、吸附时间为5 min时,移除率可达到73.40%。吸附60min时,吸附达到平衡,此后移除率为97.53%～99.65%。该吸附动力学过程符合拟二级动力学模型,吸附等温线符合Langmuir模型拟合,最大吸附量为1543.2 mg/g。α-MoO_3微球由于多级且中空的纳米结构,对MB染料具有用量少、吸附速率快和吸附完全等特点。该材料可以用于吸附废水中其他有机染料。Hierarchical semiconducting metal oxide is highly active due to its special stereostructure,which is potential adsorbent for dye contaminants.Precursors of MoO2 hollow spheres were successfully synthesized via a simple and one-step solvothermal method.And hierarchicalα-MoO3 hollow microspheres were obtained after subsequent calcination at 400℃.Diameters of theα-MoO3 microspheres were about 600?800 nm which were assembled by nanorods with a width of 70 nm.The as-obtainedα-MoO3 nanomaterials presented excellent adsorption performance for methylene blue(MB).MB removal percentage attained 73.40%in the first 5 min when the concentration ofα-MoO3 absorbent was 0.5 g/L in MB solution at the concentration of 20 mg/L.The equilibrium was established after adsorption for 60 min,and the removal percentages stabilized in the range of 97.53%-99.65%.Their adsorption kinetics was well fitted to a pseudo-second-order model.The adsorption isotherm conformed to Langmuir isotherm model,and the maximum uptake capacity was 1543.2 mg/g.Theα-MoO3 microspheres are cost-effective,fast and complete for MB removal owing to its hierarchical and hollow nanostructures,which also can be employed for adsorption of other organic dyes in waste water.

关 键 词：多级结构 α-MoO_(3)空心球 溶剂热法 亚甲基蓝 吸附性能 

分 类 号：TB321[一般工业技术—材料科学与工程]