吸附
衍射仪
铜
甲基橙
金属有机骨架
活性炭
扫描电子显微镜
材料科学
朗缪尔吸附模型
傅里叶变换红外光谱
亚甲蓝
热重分析
核化学
金属
化学
无机化学
化学工程
复合材料
冶金
物理化学
有机化学
催化作用
工程类
光催化
作者
Zhuannian Liu,Aping Fan,Chun-Hisng Ho
标识
DOI:10.1061/(asce)ee.1943-7870.0001678
摘要
The copper-based metal organic framework Cu-BTC (Copper Benzene-1,3,5-tricarboxylate) was synthesized by the solvothermal method, and AC/Cu-BTC composites were prepared by introducing different proportions of activated carbon (AC) into the reaction process by in situ synthesis. Various measures, including the use of an X-ray diffractometer (XRD), Fourier transform infrared spectrometer (FT-IR), scanning electron microscope (SEM), and N2 adsorption apparatus were applied to characterize the structure, morphology, and surface area of Cu-BTC and AC/Cu-BTC. The adsorption properties and mechanism of methylene blue (MB) and methylene orange (MO) onto Cu-BTC and AC/Cu-BTC were studied. The results showed that Cu-BTC and AC/Cu-BTC have the same octahedral structure. The adsorption amount of MB onto AC/Cu-BTC composites was higher than that of Cu-BTC. The adsorption of MB onto Cu-BTC and AC/Cu-BTC was much higher than MO. The adsorption isotherms of MB and MO onto Cu-BTC and AC/Cu-BTC could be described by the Langmuir model, while the adsorption kinetics of the two adsorbents followed the pseudo second-order model. The negative values ΔH and ΔG illustrate the spontaneity and exothermicity of the process. The adsorption amount of MB on AC/Cu-BTC decreased from 49.39 to 32.45 mg/g after 3 cycles of reuse.
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