近年来,挥发性有机化合物(VOCs)作为一种新兴污染物,引起人们的关注。其中苯系物是一类典型的VOCs。许多苯系物对生物体具有毒性,对人类健康有直接危害。因此在生产生活中,需要对大气中的苯系物浓度进行控制。在各种控制方法中,吸附法作为一种简单易行的方法被广泛研究。金属-有机骨架材料(MOFs)由于其可控的骨架结构、较大的比表面积被广泛用于气体的吸附分离,也被认为是最具有苯系物吸附潜力的材料。主要介绍了MOFs吸附典型苯系物的能力,系统分析了影响MOFs吸附典型苯系物的因素,并深入探究如何通过制备MOFs复合材料来进一步提升其吸附性能。
In recent years,volatile organic compounds (VOCs) have attracted attention as an emerging pollutant.Benzene series are a kind of typical VOCs.Many benzene series are toxic to organisms and directly harmful to human health.Therefore,it is necessary to control the concentration of benzene series in the atmosphere.Adsorption is widely studied as a simple and easy method among various methods.Metal-organic framework materials (MOFs) are widely used for gas adsorption and separation due to their controllable framework structure and large specific surface area,and also considered to be the most potential materials for benzene series adsorption.The ability of MOFs to adsorb typical benzenes,the factors affecting the adsorption of VOCs by MOFs,and how to further enhance the adsorption performance by preparing MOFs composites were studied.
[1] 郝吉明,马广大,王书肖.大气污染控制工程[M].北京:高等教育出版社,2010,414-416.
[2] Bernstein J A,Alexis N,Bacchus H,et al.The health effects of nonindustrial indoor air pollution[J].Journal of Allergy & Clinical Immunology,2008,121(3):585-591.
[3] Kim Y M,Harrad S,Harrison R M.Concentrations and sources of VOCs in urban domestic and public microenvironments[J].Environmental Science & Technology,2001,35(6):997-1004.
[4] 黄思思.金属—有机骨架材料——MOF-5和MIL-101的合成及其对VOCs的吸附/脱附性能[D].广州:华南理工大学,2010.
[5] Blocki S W.Hydrophobic zeolite adsorbent:a proven advancement in solvent separation technology[J].Environmental Progress & Sustainable Energy,1993,12(3):226-230.
[6] Zhao X S,Ma Q,Lu G Q.VOC removal:comparison of MCM-41 with hydrophobic zeolites and activated carbon[J].Energy & Fuels,1998,12(6):1051-1054.
[7] 黄海凤,顾勇义,殷操,等.高分子树脂与介孔分子筛吸附-脱附VOCs性能对比[J].中国环境科学,2012,32(1):62-68.
[8] 李立清,梁鑫,石瑞,等.酸改性活性炭对甲苯、甲醇的吸附性能[J].化工学报,2013,64(3):970-979.
[9] 立本英机,安部郁夫.活性炭的应用技术[M].高尚愚,译.南京:东南大学出版社,2002,3-4.
[10] Han S S,Goddard III W A.High H2 storage of hexagonal metal-organic frameworks from first-principles-based grand canonical monte carlo simulations[J].Journal of Physical Chemistry C,2008,112(35):13431-13436.
[11] Chen B,Eddaoudi M,Hyde S T,et,al.Interwoven metal-organic framework on a periodic minimal surface with extra-large pores[J].Science,2001,291(5506):1021-1023.
[12] 穆翠枝,徐峰,雷威.功能金属-有机骨架材料的应用[J].化学进展,2007,19(9):1345-1356.
[13] Xian S K,Yu Y,Xiao J,et,al.Competitive adsorption of water vapor with VOCs dichloroethane,ethyl acetate and benzene on MIL-101 (Cr) in humid atmosphere[J].RSC Advances,2015,5(3):1827-1834.
[14] Yang K,Sun Q,Xue F,et,al.Adsorption of volatile organic compounds by metal-organic frameworks MIL-101:influence of molecular size and shape[J].Journal of Hazardous Materials,2011,195:124-131.
[15] Cheng J Y,Wang P,Ma J P,et,al.A nanoporous Ag(I)-MOF showing unique selective adsorption of benzene among its organic analogues[J].Chemical Communications,2014,50(89):13672-13675.
[16] Vellingiri K,Kumar P,Deep A,et,al.Metal-organic frameworks for the adsorption of gaseous toluene under ambient temperature and pressure[J].Chemical Engineering Journal,2017,307:1116-1126.
[17] Cavka J H,J S,O U,et,al.A new zirconium inorganic building brick forming metal organic frameworks with exceptional stability[J].Journal of the American Chemical Society,2008,130(42):13850-13851.
[18] Katz M J,Brown Z J,Colón Y J,et,al.A facile synthesis of UiO-66,UiO-67 and their derivatives[J].Chemical Communications,2013,49(82):9449-9451.
[19] Millward A R,Yaghi O M.Metal-organic frameworks with exceptionally high capacity for storage of carbon dioxide at room temperature[J].Journal of the American Chemical Society,2005,127(51):17998-17999.
[20] Li X Y,Gao X Y,Ai L H,et,al.Mechanistic insight into the interaction and adsorption of Cr(Ⅵ) with zeolitic imidazolate framework-67 microcrystals from aqueous solution[J].Chemical Engineering Journal,2015,274:238-246.
[21] Jin Z,Zhao H Y,Zhao X J,et,al.A novel microporous MOF with the capability of selective adsorption of xylenes[J].Chemical Communications,2010,46(45):8612-8614.
[22] Peralta D,Chaplais G,Paillaud J L,et,al.The separation of xylene isomers by ZIF-8:a demonstration of the extraordinary flexibility of the ZIF-8 framework[J].Microporous & Mesoporous Materials,2013,173(3):1-5.
[23] Huang W,Jiang J,Wu D,et,al.A highly stable nanotubular MOF rotator for selective adsorption of benzene and separation of xylene isomers[J].Inorganic Chemistry,2015,54(22):10524-10526.
[24] Remy T,Ma L,Maes M,et,al.Vapor-phase adsorption and separation of ethylbenzene and styrene on the metal-organic frameworks MIL-47 and MIL-53(Al)[J].Industrial & Engineering Chemistry Research,2012,51(45):14824-14833.
[25] Maes M,Vermoortele F,Alaerts L,et,al.Separation of styrene and ethylbenzene on metal-organic frameworks:analogous structures with different adsorption mechanisms[J].Journal of the American Chemical Society,2010,132(43):15277.
[26] Zhao Z X,Shan W,Yan Y,et,al.Competitive adsorption and selectivity of benzene and water vapor on the microporous metal organic frameworks (HKUST-1)[J].Chemical Engineering Journal,2015,259(259):79-89.
[27] 吴颖.金属-有机骨架材料的吸附分离机理及功能化的计算化学研究[D].广州:华南理工大学,2017.
[28] 祝显强,刘应书,杨雄,等.吸附及解吸压力对快速变压吸附床内速度及循环性能的影响[J].北京科技大学学报,2016,38(7):993-1001.
[29] 刘航希,隋红,李鑫钢,等.甲苯分子在铝基金属-有机骨架材料上的吸附特性[J].化工进展:2016,35(11):3707-3713.
[30] Gu Z Y,Jiang D Q,Wang H F,et,al.Adsorption and separation of xylene isomers and ethylbenzene on two Zn-terephthalate metal-organic frameworks[J].Joural of physical chemistry C,2010,114(1):311-316.
[31] 陈建东,许伟城,吴军良,等.金属有机框架ZIF-8/聚二乙烯基苯纳米复合材料的合成及其吸附VOCs的性能[J].环境科学学报,2017,37(5):1877-1883.
[32] Chu F C,Zheng Y,Wen B Y,et,al.Adsorption of toluene with water on zeolitic imidazolate framework-8/graphene oxide hybrid nanocomposites in a humid atmosphere[J].RSC Advances,2018,8(5):2426-2432.
基金资助
国家自然科学基金重点项目(91643201)