| MnO2@Cu2O 复合物制备及吸附性能 |
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| 引用本文：朱柯莹,陈振婷,王楠,张兵宇,陈胜文.MnO2@Cu2O 复合物制备及吸附性能[J].上海第二工业大学(中文版),2024,41(4):380-389 |
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| 中文摘要:采用水热法制备MnO2@Cu2O复合材料, 系统研究了不同形貌Cu2O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MnO2成功负载于Cu2O表面, 使得MnO2@Cu2O(球形) 相较于Cu2O(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% MnO2@Cu2O (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Cu2O 基MnO2@Cu2O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。MnO2@Cu2O 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。 |
| 中文关键词:氧化亚铜 二氧化锰 复合物制备 酸性橙 吸附 |
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| Preparation and Adsorption Properties of MnO2@Cu2O Composites |
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| Abstract:MnO2@Cu2O composites were successfully prepared by a hydrothermal method, and the effects of different morphology Cu2O 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 MnO2 was successfully loaded on the surface of Cu2O, which enabled MnO2@Cu2O (spherical) to exhibit a larger specific surface area, pore volume, and pore size compared to Cu2O (spherical). 1% MnO2@Cu2O (spherical) showed the best adsorption of AO7 at an initial pH of 6, with an adsorption rate of 96.87%. Compared to the Cu2O-based MnO2@Cu2O composites with octahedral and orthorhombic morphology, the spherical material has more {111} crystalline active sites, which enhances its adsorption performance. The adsorption process of MnO2@Cu2O 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 ℃. |
| keywords:cuprous oxide manganese dioxide complex preparation acid orange adsorption |
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