镍/碳纳米管复合材料的合成及其吸附性能
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摘要
本文以二氰二胺和硝酸镍为原料通过煅烧法在900℃合成了镍/碳纳米管(Ni-CNT)的复合材料,采用X射线粉末衍射(XRD),扫描电镜(SEM),透射电镜(TEM),傅里叶变换红外光谱(FTIR)等手段对产物进行了表征,并对其磁性进行了测量。探讨了不同条件下(吸附时间、吸附剂量、pH)产物对刚果红溶液吸附性能的影响。结果表明,当吸附时间达到20 min、吸附剂用量达到1.0 g·L~(-1)且pH值在8时产物对刚果红的吸附率最高,达到97.8%。循环实验表明其五次吸附后依然保持良好的吸附率,且在磁场作用下,吸附剂易与溶液分离。
Ni-CNT composites were synthesized by heat treatment at 900 ℃ using Dicyandiamide(C_2H_4N_4)and nickel nitrate as raw materials,and confirmed using various analysis techniques such as X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),and infrared spectrometer(FTIR).Besides,the effects of adsorption time,adsorbent dose and pH on the adsorption of Congo red were investigated.The results show that Ni-CNT composites have the highest adsorption rate about 97.8%when the adsorption time reached 20 min,the adsorbent dosage reached 1.0 g·L~(-1),and the pH value was about 8.Through cyclic experiments,it was found that the adsorption rate remained stable after five cycles.Furthermore,the adsorbent was easy to separate from the solution by the help of external magnetic field.
Ni-CNT composites were synthesized by heat treatment at 900 ℃ using Dicyandiamide(C_2H_4N_4)and nickel nitrate as raw materials,and confirmed using various analysis techniques such as X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),and infrared spectrometer(FTIR).Besides,the effects of adsorption time,adsorbent dose and pH on the adsorption of Congo red were investigated.The results show that Ni-CNT composites have the highest adsorption rate about 97.8%when the adsorption time reached 20 min,the adsorbent dosage reached 1.0 g·L~(-1),and the pH value was about 8.Through cyclic experiments,it was found that the adsorption rate remained stable after five cycles.Furthermore,the adsorbent was easy to separate from the solution by the help of external magnetic field.
引文
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[2]Samanta A K,Basu G,Mishra L.Role of major constituents of coconut fibres on absorption of ionic dyes[J].Ind Crop Prod,2018,117:20-27.
[3]Xu D,Hein S,Loo L S,et al.Modified chitosan hydrogels for the removal of acid dyes at high pH:modification and regeneration[J].Ind Eng Chem Res,2011,50(10):6343-6346.
[4]Gailing H,Yingying S U N,Baoqiang L I U.Research on the preparation of CoFe2O4/ZnAl-LD0 absorbent and its dye adsorption performance[J].J Light Ind,2018,33(3).
[5]Tor A,Cengeloglu Y.Removal of congo red from aqueous solution by adsorption onto acid activated red mud[J].J Hazard Mater,2006,138(2):409-415.
[6]Crini G.Non-conventional low-cost adsorbents for dye removal:a review[J].Bioresource Technol,2006,97(9):1061-1085.
[7]Han R,Ding D,Xu Y,et al.Use of rice husk for the adsorption of congo red from aqueous solution in column mode[J].Bioresource Technol,2008,99(8):2938-2946.
[8]Alkan M,Demirba?,Do?an M.Adsorption kinetics and thermodynamics of an anionic dye onto sepiolite[J].Micropor Mesopor Mat,2007,101(3):388-396.
[9]Kamel M M,Youssef B M,Kamel M M.Adsorption of an-ionic dyes by kaolinites[J].Dyes Pigments,1991,15(3):175-182.
[10]Chatterjee S,Lee D S,Lee M W,et al.Enhanced adsorption of congo red from aqueous solutions by chitosan hydrogel beads impregnated with cetyl trimethyl ammonium bromide[J].Bioresource Technol,2009,100(11):2803-2809.
[11]Vimonses V,Lei S,Jin B,et al.Kinetic study and equilibrium isotherm analysis of Congo Red adsorption by clay materials[J].Chem Eng J,2009,148(2-3):354-364.
[12]Dresselhaus M S,Dresselhaus G,Eklund P C,et al.Carbon nanotubes[M]//The Physics of Fullerene-Based and Fuller-ene-Related Materials[J].Springer,Dordrecht,2000:331-379.
[13]Yao Y,Xu F,Chen M,et al.Adsorption behavior of methylene blue on carbon nanotubes[J].Bioresource Technol,2010,101(9):3040-3046.
[14]Li Y H,Wang S,Wei J,et al.Lead adsorption on carbon nanotubes[J].Chem Phys Lett,2002,357(3-4):263-266.
[15]Mishra A K,Arockiadoss T,Ramaprabhu S.Study of re-moval of azo dye by functionalized multi walled carbon nano-tubes[J].Chem Eng J,2010,162(3):1026-1034.
[16]Wang S,Ng C W,Wang W,et al.Synergistic and competitive adsorption of organic dyes on multiwalled carbon nanotubes[J].Chem Eng J,2012,197:34-40.
[17]Li Y D,Li L Q,Liao H W,et al.Preparation of pure nickel,cobalt,nickel–cobalt and nickel–copper alloys by hydrothermal reduction[J].J Mater Chem,1999,9(10):2675-2677.
[18]Wei X W,Zhou X M,Wu K L,et al.3-D flower-like NiCo alloy nano/microstructures grown by a surfactant-assisted solvothermal process[J].Cryst Eng Comm,2011,13(5):1328-1332.
[19]Li N,Hu C,Cao M.Enhanced microwave absorbing performance of CoNi alloy nanoparticles anchored on a spherical carbon monolith[J].Phys Chem Chem Phys,2013,15(20):7685-7689.
[20]Machado F M,Bergmann C P,Fernandes T H M,et al.Adsorption of reactive red M-2BE dye from water solutions by multi-walled carbon nanotubes and activated carbon[J].J Hazard Mater,2011,192(3):1122-1131.
[21]Wang S,Ng C W,Wang W,et al.Synergistic and competitive adsorption of organic dyes on multiwalled carbon nanotubes[J].Chem Eng J,2012,197:34-40.
[22]Ai L,Zhang C,Liao F,et al.Removal of methylene blue from aqueous solution with magnetite loaded multi-wall carbon nanotube:kinetic,isotherm and mechanism analysis[J].J Hazard Mater,2011,198:282-290.
[23]Hou Y,Cui S,Wen Z,et al.Strongly coupled 3D hybrids of N‐doped porous carbon nanosheet/CoNi alloy‐encapsulated carbon nanotubes for enhanced electrocatalysis[J].Small,2015,11(44):5940-5948.
[24]Mishra A K,Arockiadoss T,Ramaprabhu S.Study of re-moval of azo dye by functionalized multi walled carbon nano-tubes[J].Chem Eng J,2010,162(3):1026-1034.
[25]Shu J,Wang Z,Huang Y,et al.Adsorption removal of Congo red from aqueous solution by polyhedral Cu2O nanoparticles:Kinetics,isotherms,thermodynamics and mechanism analy-sis[J].J Alloy Compd,2015,633:338-346.
[26]任铜彦,何平,张萌萌,等.α-FeOOH纳米线的合成及其对染料废水的吸附性能研究[J].化学研究与应用,2014,7:1035-1037.
[27]吕巧强,潘莉莎,徐鼎,等.超支化聚酯接枝羧化碳纳米管的制备、表征与性能研究[J].化学研究与应用,2018,4:566-571.