摘要
利用原位合成法,将Cu-BTC负载到介孔/大孔二氧化硅孔道中,获得介孔Cu-BTC-SiO_2材料.研究在不同温度、亚甲基蓝浓度、pH值下Cu-BTC-SiO_2对亚甲基蓝吸附效果的影响,并对其吸附动力学及其吸附热力学数据进行分析.结果表明,该样品对亚甲基蓝的吸附符合Langmuir吸附等温模型和准一级动力学模型,其最佳条件为反应温度25℃,染料质量浓度为5mg/L,pH值为5.热力学研究发现,在25~45℃内,亚甲基蓝在Cu-BTC-SiO_2上的吸附行为是放热过程而且是自发进行的.
Cu-BTC-SiO2 was prepared by loading Cu-BTC into the mesoporous silica using in-situ synthesis method.The effects of Cu-BTC-SiO2 on the adsorption of methylene blue at different temperatures,different methylene blue concentrations and different pH values were studied.At the same time,the adsorption kinetics and adsorption thermodynamics data were analyzed.The results show that the adsorption of methylene blue on the sample is in accordance with Langmuir adsorption isotherm model and quasi-first order kinetic model.The optimum reaction temperature is 25 ℃,the dye concentration 5 mg/L,and the optimum pH value 5.Thethermodynamic study finds that the adsorption behavior of methylene blue on Cu-BTC-SiO2 is a spontaneous and exothermic process at the temperature between 25~45 ℃.
出处
《纺织高校基础科学学报》
CAS
2017年第4期547-552,共6页
Basic Sciences Journal of Textile Universities
基金
国家自然科学基金资助项目(21703165)
纺织工业联合会科技计划项目(2015053)
西安工程大学学科建设项目(107090817)
陕西省协同创新中心项目(2015ZX-25)
关键词
亚甲基蓝
介孔
吸附动力学
吸附热力学
methylene blue
mesoporous
adsorption kinetics
adsorption thermodynamics
