Wei Fuhua, Chen Ding, Liang Zhao, Zhao Shuaiqi
College of Materials Science and Engineering, Hunan University, Changsha 410082, China.
College of Chemistry and Chemical Engineering, Anshun University, Anshun 561000, China.
Nanomaterials (Basel). 2018 Apr 17;8(4):248. doi: 10.3390/nano8040248.
Using a microwave-assisted ball-milling approach, Fe-based metal-organic frameworks (Fe-MOFs) were prepared from FeSO₄·7H₂O and trimesic acid. Scanning electron microscopy, Fourier-transform infrared spectrometry, X-ray, and thermogravimetric analysis were utilized to characterize the thermal stability and structure of the prepared Fe-MOFs. These Fe-MOFs were used to remove organic dyes from aqueous solutions. Specifically, they removed 96.97% of 23.3592 mg/L of Congo red in a 200 mL solution within 300 min of treatment with natural light at 15 °C. Likewise, 88.21 and 70.90% of 22.7527 mg/L of Orange II and 17.8326 mg/L of Rhodamine B, respectively, were removed from 200 mL solutions within 300 min of treatment at 15 °C. At 35 °C, 99.57, 95.98, and 99.38% of 23.3855 mg/L of Congo Red, 22.7365 mg/L of Orange II, and 17.9973 mg/L of Rhodamine B, respectively, were removed from 200 mL solutions within 300 min of treatment. The adsorption kinetics were investigated and the pseudo-first-order kinetic model was found to be superior to the pseudo-second-order kinetic model. Overall, using metal-organic frameworks to treat dye wastewater was found to be inexpensive, feasible, and efficient. Therefore, this material has future prospects in research and applications in the purification of wastewater.
采用微波辅助球磨法，以FeSO₄·7H₂O和均苯三甲酸为原料制备了铁基金属有机框架材料（Fe-MOFs）。利用扫描电子显微镜、傅里叶变换红外光谱、X射线和热重分析对所制备Fe-MOFs的热稳定性和结构进行了表征。这些Fe-MOFs用于去除水溶液中的有机染料。具体而言，在15℃自然光下处理300分钟后，它们从200 mL溶液中去除了23.3592 mg/L刚果红的96.97%。同样，在15℃处理300分钟后，分别从200 mL溶液中去除了22.7527 mg/L橙黄II的88.21%和17.8326 mg/L罗丹明B的70.90%。在35℃时，在300分钟处理时间内，分别从200 mL溶液中去除了23.3855 mg/L刚果红的99.57%、22.7365 mg/L橙黄II的95.98%和17.9973 mg/L罗丹明B的99.38%。对吸附动力学进行了研究，发现伪一级动力学模型优于伪二级动力学模型。总体而言，发现使用金属有机框架处理染料废水成本低、可行且高效。因此，这种材料在废水净化的研究和应用方面具有未来前景。
