摘要
通过在H2中煅烧沉积在膨润土表面的MoS3,制备纳米MoS2/膨润土复合物。利用热重分析、X射线衍射、扫描电镜和透射电镜等对获得的复合物进行表征。结果表明:纳米MoS2微粒分布在膨润土表面并形成层状结构,层间距大约为0.64nm。获得的复合物具有优良的脱除甲基橙的性能,并受到复合物用量、甲基橙初始浓度、温度和pH值等操作条件的影响,但不受光源的影响。复合物脱除甲基橙属于吸附机理,符合准二级动力学模型。
A nano-MoS2/bentonite composite was synthesized by calcinating MoS3 deposited on bentonite in H2. The obtained composite was characterized using thermogravimetric analysis, X-ray diffractometer, scanning electron microscope and transmission electron microscope. The results show that nano-MoS2 particles are distributed on the surface of bentonite and form layered structures with layer distance of about 0.64 nm. The composite presents an excellent performance for the removal of methyl orange. Some operation conditions affect the removal efficiency of methyl orange, such as dosage of composite, initial concentration of methyl orange, temperature and pH value. However, light source does not influence the removal efficiency. The removal mechanism is attributed to the adsorption of methyl orange on the nano-MoS2/bentonite composite. The adsorption of methyl orange on the composite is in accordance with the pseudo-second-order kinetic model.
基金
Project (2011M500110) supported by the Postdoctoral Science Foundation of China
Project (50905054) supported by the National Natural Science Foundation of China
Project (12RC03) supported by Hefei University, China
关键词
二硫化钼
膨润土
纳米微粒
光催化
吸附
有机染料
molybdenum disulfide
bentonite
nanoparticles
photocatalysis
adsorption
organic dye
