| Volatile organic compounds(VOCs)have become the worldwide threat of growing concern,and Metal organic frameworks(MOFs)have been developed to resolve this pollution.In these MOFs,MIL-101 was become our research object,it has high surface area and pore volume,which is considered as one of the most prominent and representative material.The main contents and innovations of the thesis are as follows:The MIL-101 and MIL-101/GrO composites were synthesized by hydrothermal method.The prepared material was characterized using field emission scanning electron microscopy(SEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),thermogravimetric analysis(TGA)and nitrogen adsorption.The results indicated that the specific area and pore volume of MIL-101/GrO were much higher than pure MIL-101.The capacity of carbon tetrachloride on the MIL-101 was 2044.4 mg/g at 303K,and the MIL-101/GrO-0.25 composite possessed the maximum carbon tetrachloride uptake of 2368.1 mg/g,which increased by 16%in comparison with the pure MIL-101.The MIL-101/GrO-0.25 was compared with the conventional adsorbent,and the result showed that the adsorbing amount of carbon tetrachloride on the MIL-101/GrO-0.25 was about 2.2,3.9 and 5.5 times for the MCM-41,activated carbon BPL and hydrophobic zeolite Y.Considering the spectral of ultraviolet-visible(UV-vis)spectrophotometer,the selective adsorption of carbon tetrachloride and methanol in water was investigated.The results showed that the methanol(789 g/L)uptake of MIL-101 was decreased by 61.1%with the concentration of carbon tetrachloride increased from 1 g/L to 5 g/L in the mixture of carbon tetrachloride,methanol and water solution.The thesis indicated that the MIL-101 and MIL-101/GrO composites are promising candidates for adsorption of carbon tetrachloride,and the competitive advantage of carbon tetrachloride with methanol makes MIL-101 become promising candidate for adsorption of carbon tetrachloride in water environment. |
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