水热反应时间对氧化锌纳米线结构及脱硫性能的影响
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摘要
先采用水热法制备出氧化锌(ZnO)纳米线,然后以硝酸镍作为活性组分的前驱体盐,ZnO纳米线作为载体,采用等体积浸渍法制备出镍(Ni)/ZnO催化剂,考察了水热反应时间对ZnO纳米线微观形貌及Ni/ZnO催化剂孔结构的影响,并在80 m L固定床反应管中考察了Ni/ZnO催化剂的反应吸附脱硫性能。结果表明:当水热反应时间为36 h时,所制备ZnO纳米线特征衍射峰尖锐,呈现花簇状生长;Ni/ZnO催化剂的比表面积最大,其值为35.25 m2/g;吸附脱硫反应持续60 h后,脱硫率仍高于91%。
ZnO nanowire was prepared by hydrothermal method,then with nickel nitrate as the precursor salt active component,ZnO nanowire as carrier,Ni/ZnO catalyst was prepared by equal volume impregnation method,the influences of hydrothermal reaction time on ZnO nanowire morphology and pore structure of catalyst Ni/ZnO were studied,and the reactive adsorption desulfurization performance of Ni/ZnO catalyst was investigated in an 80 m L fixed bed reaction tube. The results showed that when the hydrothermal reaction time was 36 h,the characteristics diffraction peak of the prepared ZnO nanowire was sharp,showing the growth as flower like. Ni/ZnO catalyst has the largest specific surface area,and its value was 35. 25 m2/g. The adsorption desulfurization reaction lasted for 60 h,and the desulfurization rate was still higher than 91%.
ZnO nanowire was prepared by hydrothermal method,then with nickel nitrate as the precursor salt active component,ZnO nanowire as carrier,Ni/ZnO catalyst was prepared by equal volume impregnation method,the influences of hydrothermal reaction time on ZnO nanowire morphology and pore structure of catalyst Ni/ZnO were studied,and the reactive adsorption desulfurization performance of Ni/ZnO catalyst was investigated in an 80 m L fixed bed reaction tube. The results showed that when the hydrothermal reaction time was 36 h,the characteristics diffraction peak of the prepared ZnO nanowire was sharp,showing the growth as flower like. Ni/ZnO catalyst has the largest specific surface area,and its value was 35. 25 m2/g. The adsorption desulfurization reaction lasted for 60 h,and the desulfurization rate was still higher than 91%.
引文
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[2]包木太,牟伯中,王修林,等.微生物提高石油采收率技术[J].应用基础与工程科学学报,2000,8(3):236-245.
[3]梁凤来,程守强,孙雪莲,等.解烃细菌NX-2的特征及矿场实验[J].微生物学通报,2004,31(3):70-73.
[4]徐美,张慰萍,尹民,等.纳米Zn O的燃烧法制备和光谱特性[J].无机材料学报,2003,18(4):933-936.
[5]沈茹娟,贾殿赠,乔永民,等.纳米Zn O的固相合成及气敏特性[J].无机材料学报,2001,16(4):625-629.
[6]章金兵,许民,周小英.固相法合成氧化锌纳米结构[J].无机盐工业,2005,37(7):18-20.
[7]李栋梁,董峰亮,邹炳锁.直接沉淀法制备纳米Zn O[J].化工新型材料,2002,30(6):48-51.
[8]李长全,罗小玲,傅敏恭.直接沉淀法制备纳米Zn O及其抗菌试验的研究[J].化工新型材料,2005,33(5):57-58.
[9]辛显双,周百斌,刘双全,等.均匀沉淀法制备氧化锌纳米结构的工艺条件[J].化学与粘合,2002(5):203-205.
[10]王赛,周莹,汤琳,等.均匀沉淀法制备纳米Zn O[J].贵州化工,2006,31(5):37-39.
[11]李东升,史振民,秦振平,等.溶胶-凝胶前体法制备纳米Zn O[J].吉首大学学报,2001,22(1):75-77.
[12]邵忠宝,李国荣.高分子网络凝胶法制备纳米Zn O粉料[J].材料研究学报,2001,15(6):681-685.
[13]白凡飞,贺平,贾志杰,等.原位生成法制备单分散的氧化锌纳米结构分散液[J].材料科学与工程学报,2005,23(5):580-583.
[14]徐甲强,王焕新,张建荣,等.微波水解法制备纳米Zn O及其气敏特性研究[J].无机材料学报,2004,19(6):1441-1445.
[15]陆鹏,陆红霞,李世涛,等.多糖绿色合成氧化锌纳米结构的研究[J].电子元件与材料,2005,24(10):33-35.
[16]Matarai,Take S,Nikko A K K.Production of globular zinc oxide:JP,63288914[P].1988-11-25.
[17]陈艺峰,唐漠堂,张保平,等.气相氧化法制备氧化锌的结晶形貌[J].中国有色金属学报,2004,14(3):504-508.
[18]Sun Ye,Gareth M F,Michael N R A.Growth mechanisms for Zn O nanorods formed by pulsed laser deposition[J].Superlattices Microstructures,2006,39(1/4):33-40.
[19]赵新宇,郑百存,李春忠,等.喷雾热解法合成Zn O超细粒子工艺及机理研究[J].无机材料学报,1996,11(4):611-616.
[20]董立峰,崔作林.电弧等离子体制备纳米Zn O的气敏特性[J].材料研究学报.1998,12(4):407-410.
[21]吴明霞,王树林,丁浩冉,等.水解锌纳米结构对甲基橙的光催化降解[J].化工学报,2008,59(4):1016-1021.
[22]Polsong K D,Chamnimok P,Pukird S,et al.Effect of synthesis conditions on the growth of Zn O nanorods via hydrothermal method[J].Physica B:Condensed Matter,2008,403(19):3713-3717.
[23]郭敏,刁鹏,王新东,等.水热法制备氧化锌纳米棒阵列的生长动力学研究[J].北京科技大学学报,2007,29(7):735-738.