MnO_(2)@Cu_(2)O复合物制备及吸附性能  

Preparation and Adsorption Properties of MnO_(2)@Cu_(2)O Composites

作　　者：朱柯莹 陈振婷 王楠 张兵宇 陈胜文[1] ZHU Keying;CHEN Zhenting;WANG Nan;ZHANG Bingyu;CHEN Shengwen(School of Resources and Environmental Engineering,Shanghai Polytechnic University,Shanghai 201209,China)

机构地区：[1]上海第二工业大学资源与环境工程学院,上海201209

出　　处：《上海第二工业大学学报》2024年第4期380-389,共10页Journal of Shanghai Polytechnic University

摘　　要：采用水热法制备MnO_(2)@Cu_(2)O复合材料,系统研究了不同形貌Cu_(2)O基底及铜锰摩尔比例对酸性橙(AO7)染料吸附性能的影响。采用吸附动力学、吸附热力学以及吸附等温线模型对其吸附过程进行拟合分析。研究结果表明,线状MnO_(2)成功负载于Cu_(2)O表面,使得MnO_(2)@Cu_(2)O(球形)相较于Cu_(2)O(球形)展现出更大的比表面积、孔容和孔径。在初始pH值为6时,1%MnO_(2)@Cu_(2)O(球形)对AO7的吸附效果最佳,吸附率达到96.87%。相比于八面体和正方体形貌的Cu_(2)O基MnO_(2)@Cu_(2)O复合材料,球形材料具有更多的{111}晶面活性位点,吸附性能更好。MnO_(2)@Cu_(2)O对AO7的吸附过程符合准一级动力学模型和Langmuir吸附模型,吸附反应为自发地单层物理吸附,且为放热过程。实验数据还表明,较低温度时更有利于吸附反应的进行,且25℃时该材料的最大吸附量为361.17 mg/g。MnO_(2)@Cu_(2)O composites were successfully prepared by a hydrothermal method,and the effects of different morphology Cu_(2)O substrates and copper-manganese molar ratios on the adsorption properties of acid orange(AO7)dye were systematically investigated.The adsorption process was analyzed by fitting adsorption kinetics,adsorption thermodynamics,and adsorption isotherm models.The results show that the linear MnO_(2)was successfully loaded on the surface of Cu_(2)O,which enabled MnO_(2)@Cu_(2)O(spherical)to exhibit a larger specific surface area,pore volume,and pore size compared to Cu_(2)O(spherical).1%MnO_(2)@Cu_(2)O(spherical)showed the best adsorption of AO7 at an initial pH of 6,with an adsorption rate of 96.87%.Compared to the Cu_(2)O-based MnO_(2)@Cu_(2)O composites with octahedral and orthorhombic morphology,the spherical material has more {111} crystalline active sites,which enhances its adsorption performance.The adsorption process of MnO_(2)@Cu_(2)O on AO7 is in accordance with the quasi-primary kinetic model and Langmuir adsorption model,and the adsorption reaction is spontaneous monolayer physical adsorption and exothermic.In addition,the experimental data also showed that the adsorption reaction was more favorable at lower temperatures,and the theoretical maximum adsorption amount of the material was 361.17 mg/g at 25℃.

关 键 词：氧化亚铜 二氧化锰 复合物制备 酸性橙 吸附 

分 类 号：X703[环境科学与工程—环境工程]