摘要
文章研究微波法快速合成氨基功能化MOFs可持续吸附去除重金属Cu^2+。研究吸附时间、pH、吸附温度和不同后处理方法对功能化MOFs吸附重金属Cu2+的影响。依据功能化MOFs的XRD图谱确定晶体晶型(Ui O-66-NH2),由FESEM图确定晶体尺寸不到100nm。结果表明:微波700W反应5min,DMF和CHCl3各洗涤三次,70℃干燥2h获得的功能化MOFs吸附性能最好,吸附温度在40℃,pH=4.8,吸附的时间为2h时,Cu^2+的吸附量能达到34.6mg/g。氯仿洗涤的MOFs二次吸附能力较高,而甲醇洗涤的MOFs循环再生能力较好,二次循环吸附再生率接近90%。
In this paper, we used functionalized MOFs via a microwave-promoted fast synthesis method in sustainable adsorption of heavy metal Cu^2+. Wherein, adsorption time, pH, adsorption temperature and different post-treatments of the MOFs were studied. Based on the X-ray diffraction spectrum, the crystal patterns were confirmed(UiO-66-NH2), and according to the FESEM, the size of the crystals were less than 100 nm. The results showed that the MOFs with the best adsorptive performance were obtained at the conditions of microwave power 700 W for 5 min, then washing 3 times by DMF and CHCl3 separately and drying 2 hours at 70℃. The adsorption capacity of Cu^2+ can reach 34.6 mg/g at the adsorptive temperature of 40℃, pH of 4.8, and absorption time of 2 h. The secondary adsorption capacity of the MOFs washed by chloroform was high, while the MOFs washed by methanol showed good recycling ability with an adsorption regeneration rate in secondary circulation nearly 90%.
作者
王珂
张尧
WANG Ke;ZHANG Yao(Department of Material & Chemical Engineering,Bengbu University,Bengbu 233030,China)
出处
《化工管理》
2019年第28期128-131,135,共5页
Chemical Engineering Management
基金
蚌埠学院重点自然科学基金项目(2017ZR05zd)
蚌埠学院教研项目(sykc185)
关键词
功能化MOFs
微波快速合成
后处理
重金属
functionalized MOFs
microwave-promoted fast synthesis
post-treatment
heavy metal
