摘要
以氯化钴(CoCl_2·6H_2O)和钼酸铵((NH_4)_6Mo_7O_(24)·4H_2O)为原料,通过水解、静电自组装和焙烧制成介孔Co_3O_4/MoO_3,再用NaOH溶解得到介孔Co_3O_4。用X射线粉末衍射(XRD)、透射电镜(TEM)和比表面及孔隙度分析仪(ASAP)对制备材料进行表征,合成的介孔Co_3O_4最大BET比表面积为127.4 m~2/g,平均孔直径为4nm。用制备的介孔Co_3O_4/MoO_3和介孔Co_3O_4为催化剂,亚甲蓝(MB)、罗丹明B(RhB)和甲基橙(MO))为染料废水,以双氧水(H2O2)为氧化剂进行催化降解研究,制备的介孔材料对有机染料均有较高的催化降解活性。
Mesoporous Co_3O_4 was prepared with the assistance of MoO_4~(2-) as templating agent at room temperature.X-ray diffraction(XRD),transmission electron microscopy(TEM)and surface area and porosity analyzer(ASAP)were used for characteration of mesoporous Co_3O_4.It has a high surface area of 127.4m~2/g and a mesoporous structure with an average pore diameter of 3-4nm.Its catalytic activities were evaluated by the degradation of methyl orange(MO),rhodamine B(RhB)and methylene blue(MB)in aqueous solution with H_2O_2 as oxidizing agent.
引文
[1]Xiong S,Yuan C,Zhang X,et al.Controllable synthesis of mesoporous Co3O4 nanostructures with tunable morphology for application in supercapacitors[J].ChemistryA European Journal,2009,15(21):5320-5326.
[2]Liu X,Long Q,Jiang C,et al.Facile and green synthesis of mesoporous Co3O4nanocubes and their applications for supercapacitors[J].Nanoscale,2013,5(14):6525-6529.
[3]Fu Xiaoyan,Mei Jun,Liu Hao,et al.Preparation and electrochemical performance of carbon aerogel/cobaltosic oxide composites[J].Journal of Functional Materials,2015,46(6):24.傅晓燕,梅军,刘昊,等.碳气凝胶/四氧化三钴复合材料的制备及电化学性能[J].功能材料,2015,46(6):24.
[4]Rao Yanyan,Zhang Jiuxing,Wang Che,et al.SPS in-situ synthesis of WC-Co hardmetal by directly carbonization of tungsten/cobalt oxide[J].Rare Metals and Cemented Carbides,2006,34(1):18-21.饶岩岩,张久兴,王澈,等.钨/钴氧化物SPS直接碳化原位合成超细WC-Co硬质合金[J].稀有金属与硬质合金,2006,34(1):18-21.
[5]Cai Zhenping.Synthesis and electrochemical performance of Co3O4as negative electrode materials for lithium-ion batteries[J].Chinese Journal of Power Sources,2003,27(4):370-372.蔡振平.锂离子蓄电池负极材料Co3O4的制备及性能[J].电源技术,2003,27(4):370-372.
[6]Chang Zhaorong,Li Huaji,Tang Hongwei,et al.The effect of additiveγ-CoOOH on electrode characteristics of nickel hydroxide[J].Journal of Functional Materials,2009,40(9):1541-1544.常照荣,李华吉,汤宏伟,等.添加剂γ-CoOOH对氢氧化镍电极性能的影响[J].功能材料,2009,40(9):1541-1544.
[7]Suraja P,Yaakob Z,Binitha N,et al.Co3O4doped over SBA 15:excellent adsorbent materials for the removal of methyleneblue dye pollutant[J].Clean Technologies and Environmental Policy,2013,15(6):967-975.
[8]Salavati-Niasari M,Farhadi-Khouzani M,Davar F.Bright blue pigment CoAl2O4nanocrystals prepared by modified sol-gel method[J].Journal of Sol-Gel Science and Technology,2009,52(3):321-327.
[9]Liang Y,Li Y,Wang H,et al.Co3O4 nanocrystals on graphene as a synergistic catalyst for oxygen reduction reaction[J].Nature Materials,2011,10(10):780-786.
[10]Grzelczak M,Zhang J,Pfrommer J,et al.Electro-and photochemical water oxidation on ligand-free Co3O4nanoparticles with tunable sizes[J].Acs Catalysis,2013,3(3):383-388.
[11]Li Yanhua,Huang Kelong,Zeng Dongming,et al.Preparation and application of Co3O4 nanostructures with various morphologies[J].Progress In Chemistry,2010,(11):2119-2125.李艳华,黄可龙,曾冬铭,等.各种形貌纳米Co3O4的制备及其应用[J].化学进展,2010,(11):2119-2125
[12]Hu Lei,Liu ZhiHong.Preparation and application of Co3O4powder[J].Materials Science and Engineering of Powder Metallurgy,2008,13(4):195-200.胡雷,刘志宏.四氧化三钴粉末的制备与应用现状[J].粉末冶金材料科学与工程,2008,13(4):195-200.
[13]Ye Xiangguo,Zhang Xiaogang,Mi Hongyu,et al.Hydrothermal microemulsion synthesis of Co3O4 with different morphologies and their electrochemical capacitance[J].Acta Phys Chim Sin,2008,24(6):1105-1110.叶向果,张校刚,米红宇,等.不同形貌Co3O4的水热-微乳液法制备及其电化学性能[J].物理化学学报,2008,24(6):1105-1110
[14]Zeng Wenwen,Huang Kelong,Yang Youping,et al.Solvothermal synthesis and capacitance performance of co3O4 with different morphologies[J].Acta Phys Chim Sin,2008,24(2):263-268.曾雯雯,黄可龙,杨幼平,等.溶剂热法合成不同形貌的Co3O4及其电容特性[J].物理化学学报,2008,24(2):263-268.
[15]Long M,Cai W,Cai J,et al.Efficient photocatalytic degradation of phenol over Co3O4/BiVO4composite under visible light irradiation[J].The Journal of Physical Chemistry B,2006,110(41):20211-20216.
[16]Hu L,Peng Q,Li Y.Selective synthesis of Co3O4nanocrystal with different shape and crystal plane effect on catalytic property for methane combustion[J].Journal of the American Chemical Society,2008,130(48):16136-16137.
[17]Xu Y J,Zhuang Y,Fu X.New insight for enhanced photocatalytic activity of TiO2 by doping carbon nanotubes:a case study on degradation of benzene and methyl orange[J].The Journal of Physical Chemistry C,2010,114(6):2669-2676.
[18]Xiao Q,Zhang J,Xiao C,et al.Photocatalytic degradation of methylene blue over Co3O4/Bi2WO6 composite under visible light irradiation[J].Catalysis Communications,2008,9(6):1247-1253.
[19]Wu Wen,Wang Yonggang,Li Feng,et al.Electrochemical capacitance performance of ordered mesoporous Co3O4synthesized by template method[J].Acta Chimica Sinica,2009,67(3):208-212.吴雯,王永刚,李峰,等.模板法制备的有序介孔Co3O4的电化学电容行为[J].化学学报,2009,67(3):208-212
[20]Bao Yan,Yang Yongqiang,Ma Jianzhong.Research progress of hollow structural materials prepared via templating method[J].Journal of Inorganic Materials,2013,28(5):459-468.鲍艳,杨永强,马建中.模板法制备中空结构材料的研究进展[J].无机材料学报,2013,28(5):459-468.
[21]BaùL,BártováB,Arduini M,et al.Surfactant-free synthesis of mesoporous and hollow silica nanoparticles with an inorganic template[J].Chemical Communications,2009,(48):7584-7586.
[22]Chen H,Xu J,Xu X,et al.Preparation of mesoporous NiO with excellent pseudocapacitive behavior[J].European Journal of Inorganic Chemistry,2013,2013(7):1105-1108.
[23]Parks G A.The isoelectric points of solid oxides,solid hydroxides,and aqueous hydroxo complex systems[J].Chemical Reviews,1965,65(2):177-198.
[24]Krishnan C,Garnett M,Hsiao B,et al.Electrochemical measurements of isopolyoxomolybdates:1.pH dependent behavior of sodium molybdate[J].International Journal of Electrochemical Science,2007,2:29-51.
