三元金属催化剂Fe/Co/Ni/MgO催化热解法制备碳纳米管
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摘要
以硝酸铁(Fe(NO_3)_3·6H_2O)、硝酸钴(Co(NO_3)_2·6H_2O)、硝酸镍(Ni(NO_3)_2·6H_2O)和硝酸镁(Mg(NO_3)_2·6H_2O)作为三元金属催化剂Fe/Co/Ni/MgO前驱物,在400℃下采用柠檬酸络合法制备三元金属催化剂Fe/Co/Ni/MgO。采用催化热解法以乙炔(C_2H_2)为碳源气、氮气(N_2)为保护气、氢气(H_2)为还原气体制备碳纳米管,研究不同温度条件对裂解反应生长碳纳米管的影响,并借助场发射扫描电镜(FESEM)测试手段对碳纳米管的形貌进行表征。实验结果表明:当长碳温度为550℃时,催化剂聚合物团簇分散效果最佳,碳纳米管的产量达到最大,形貌较好。
In this paper, Fe/Co/Ni/Mg O catalysts for carbon nanotubes synthesis were prepared by citric acid complex method at400 ℃. Ferric nitrate(Fe(NO_3)_3·6H_2O), cobalt nitrate(Co(NO_3)_2·6H_2O), n ickel nitrate(Ni(NO_3)_2·6H_2O) and magnesium nitrate(Mg(NO_3)_2·6H_2O) were chose as the catalyst precursor. CNTs were synthesized by catalytic pyrolysis method with acetylene(C_2H_2)as carbon source, nitrogen(N_2) as shielding gas and hydrogen(H_2) as reducing gas. At the same time, the effects of different temperature conditions on the production of nanotubes synthesized by cracking reaction were studied. In addition, we have studied the growth characteristics of CNTs by the field emission scanning electron microscopy. The results shows that, catalyst polymer clusters can be perfectly smashed, then production and growth characteristics were maximized when the temperature is 550 ℃.
In this paper, Fe/Co/Ni/Mg O catalysts for carbon nanotubes synthesis were prepared by citric acid complex method at400 ℃. Ferric nitrate(Fe(NO_3)_3·6H_2O), cobalt nitrate(Co(NO_3)_2·6H_2O), n ickel nitrate(Ni(NO_3)_2·6H_2O) and magnesium nitrate(Mg(NO_3)_2·6H_2O) were chose as the catalyst precursor. CNTs were synthesized by catalytic pyrolysis method with acetylene(C_2H_2)as carbon source, nitrogen(N_2) as shielding gas and hydrogen(H_2) as reducing gas. At the same time, the effects of different temperature conditions on the production of nanotubes synthesized by cracking reaction were studied. In addition, we have studied the growth characteristics of CNTs by the field emission scanning electron microscopy. The results shows that, catalyst polymer clusters can be perfectly smashed, then production and growth characteristics were maximized when the temperature is 550 ℃.
引文
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[2]欧阳玉,彭景翠,易双萍.碳纳米管的稳定性研究[J].物理学报,2008,57(1):615-620.
[3]闰晓琦,郭雪芹,王达,等.碳纳米管的储氢机理研究[J].实验室科学,2007(5):69-70.
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[7]吕德义,徐丽萍,徐铸德,等.CVD法制备碳纳米管的TG-DTA研究[J].化学物理学报,2012,15(2):118-122.
[8]练澎,张小凤.碳纳米管制备方法的研究进展[J].当代化工,2015,44(4):737-739.
[9]关超,刘新宽,刘平,等.原位复合法制备碳纳米管复合材料的研究进展[J].热加工工艺,2014,43(14):7-11.
[10]刘华平,程国安,彭宜斌,等.碳纳米管负载Ni催化剂制备碳纳米管的研究[J].北京师范大学学报(自然科学版),2005,41(1):35-42.
[11]郭娇.La-Mg-Ni系贮氢合金/Zn O催化剂CVD法制备碳纳米管[J].广州化工,2013,41(24):68-69.
[2]欧阳玉,彭景翠,易双萍.碳纳米管的稳定性研究[J].物理学报,2008,57(1):615-620.
[3]闰晓琦,郭雪芹,王达,等.碳纳米管的储氢机理研究[J].实验室科学,2007(5):69-70.
[4]曹震.碳纳米管改性及其电化学性质研究[D].淮南:安徽理工大学,2012:1-4.
[5]GONG Z Q,SU J R,GHANI S A.Electrochemical fabrication,characterization and application of carboxylic multi-walled carbon nanotube modified composite pencil graphite electrodes[J].Electrochimica acta,2012,65:257-265.
[6]VECITIS C D,SCHNOOR M H,RAHAMAN M S,et al.Electrochemical multiwalled carbon nanotube filter for viral and bacterial removal and inactivation[J].Environ Sci Technol,2011,45(8):3672-3679.
[7]吕德义,徐丽萍,徐铸德,等.CVD法制备碳纳米管的TG-DTA研究[J].化学物理学报,2012,15(2):118-122.
[8]练澎,张小凤.碳纳米管制备方法的研究进展[J].当代化工,2015,44(4):737-739.
[9]关超,刘新宽,刘平,等.原位复合法制备碳纳米管复合材料的研究进展[J].热加工工艺,2014,43(14):7-11.
[10]刘华平,程国安,彭宜斌,等.碳纳米管负载Ni催化剂制备碳纳米管的研究[J].北京师范大学学报(自然科学版),2005,41(1):35-42.
[11]郭娇.La-Mg-Ni系贮氢合金/Zn O催化剂CVD法制备碳纳米管[J].广州化工,2013,41(24):68-69.