表面活性剂对Co_3O_4改性TiO_2纳米管形貌及光催化性能的影响
|
摘要
采用电化学还原-热处理法得到Co_3O_4/TiO_2 NTs(二氧化钛纳米管)的p-n异质结构复合催化剂,通过加入表面活性剂聚乙烯基吡咯烷酮(PVP)和聚乙二醇辛基苯基醚(Triton X-100)获得了高度分散均匀且细小的颗粒。SEM表明通过加入PVP使颗粒大小和空间分布都更加均匀,而混合表面活性剂的协同作用则使负载颗粒尺寸进一步变小。实验结果表明得到的样品与未加表面活性剂的相比,显示出优异的光电流特性和降解亚甲基蓝(MB)染料的性能。
The composite catalyst of Co_3O_4/TiO_2 NTs(titanium dioxide nanotubes)with p-n heterostructure was obtained by electrochemically reduction-heat annealing treatment.Highly dispersed,uniform and very small Co_3O_4 particles were prepared on TiO_2 NTs due to addition of surfactant polyethylene pyrrolidone(PVP)and polyethylene glycol symplectic benzene ether(Triton X-100).SEM results show that the particle dispersion is more uniform by adding PVP,and the synergistic effect of mixed surfactants will further reduce the size of the loaded particles.The experimental results show that the obtained samples exhibits excellent photocurrent characteristics and degradation of methylene blue(MB)dyes compared with those without surfactants.
The composite catalyst of Co_3O_4/TiO_2 NTs(titanium dioxide nanotubes)with p-n heterostructure was obtained by electrochemically reduction-heat annealing treatment.Highly dispersed,uniform and very small Co_3O_4 particles were prepared on TiO_2 NTs due to addition of surfactant polyethylene pyrrolidone(PVP)and polyethylene glycol symplectic benzene ether(Triton X-100).SEM results show that the particle dispersion is more uniform by adding PVP,and the synergistic effect of mixed surfactants will further reduce the size of the loaded particles.The experimental results show that the obtained samples exhibits excellent photocurrent characteristics and degradation of methylene blue(MB)dyes compared with those without surfactants.
引文
[1] OZKAN S,MAZARE A,SCHMUKI P.Extracting the limiting factors in photocurrent measurements on TiO2 nanotubes and enhancing the photoelectrochemical properties by Nb doping[J].Electrochimica Acta,2015,176:819-826.
[2] HEJAZI S,NGUYEN N T,MAZARE A,et al.Aminated TiO2 nanotubes as a photoelectrochemical water splitting photoanode[J].Catalysis Today,2017,281:189-197.
[3] YIN L,JI S,LIU G,et al.Understanding the growth behavior of titania nanotube[J].Electrochemistry Communications,2011,13(5):454-457.
[4] TAVEIRA L V,MACAK J M,TSUCHIYA H,et al.Initiation and growth of self-organized TiO2 nanotubes anodically formed in NH4F/(NH4)2SO4 electrolytes[J].Journal of the Electrochemical Society,2005,152(10):B405-B410.
[5] LAI Y,GONG J,LIN C.Self-organized TiO2 nanotube arrays with uniform platinum nanoparticles for highly efficient water splitting[J].International Journal of Hydrogen Energy,2012,37(8):6438-6446.
[6] 芮海龙,崔纪琨,王智文,等.阳极氧化法制备 TiO2 薄膜及光电化学性能研究[J].化工科技,2017,25(2):21-25.
[7] DAI G,LIU S,LIANG Y,et al.Synthesis and enhanced photoelectrocatalytic activity of p-n junction Co3O4/TiO2 nanotube arrays[J].Applied Surface Science,2013,264:157-161.
[8] HUANG B,YANG W,WEN Y,et al.Co3O4-modified TiO2 nanotube arrays via atomic layer deposition for improved visible-light photoelectrochemical performance[J].ACS Appl Mater Interfaces,2015,7(1):422-431.
[9] HUANG L,HU X,YUAN S,et al.Photocatalytic preparation of nanostructured MnO2-(Co3O4)/TiO2 hybrids:The formation mechanism and catalytic application in SCR deNOx reaction[J].Applied Catalysis B:Environmental,2017,203:778-788.
[10] 张飞龙,郭景丽,罗鹏飞,等.纳米Cu2O的合成及其光催化性能研究[J].化工科技,2017,25(1):59-63.
[11] ZHANG L,LI Y,ZHANG Q,et al.Well-dispersed Pt nanocrystals on the heterostructured TiO2/SnO2 nanofibers and the enhanced photocatalytic properties[J].Applied Surface Science,2014,319:21-28.
[12] CHA G,SCHMUKI P,ALTOMARE M.Free-standing membranes to study the optical properties of anodic TiO2 nanotube layers[J].Chemistry-An Asian Journal,2016,11(5):789-797.
[13] SO S,HWANG I,RIBONI F,et al.Robust free standing flow-through TiO2 nanotube membranes of pure anatase[J].Electrochemistry Communications,2016,71:73-78.
[14] CHENG X,LIU H,CHEN Q,et al.Construction of N,S codoped TiO2 NCs decorated TiO2 nano-tube array photoelectrode and its enhanced visible light photocatalytic mechanism[J].Electrochimica Acta,2013,103:134-142.
[15] 陈丽铎.磁性铋基材料的合成及其光催化性能的研究[D].大庆:东北石油大学,2016.
[16] AI G,MO R,LI H,et al.Cobalt phosphate modified TiO2 nanowire arrays as co-catalysts for solar water splitting[J].Nanoscale,2015,7(15):6722-6728.
[17] RAMAKRISHNAN V,KIM H,PARK J,et al.Cobalt oxide nanoparticles on TiO2 nanorod/FTO as a photoanode with enhanced visible light sensitization[J].RSC Advances,2016,6(12):9789-9795.
[2] HEJAZI S,NGUYEN N T,MAZARE A,et al.Aminated TiO2 nanotubes as a photoelectrochemical water splitting photoanode[J].Catalysis Today,2017,281:189-197.
[3] YIN L,JI S,LIU G,et al.Understanding the growth behavior of titania nanotube[J].Electrochemistry Communications,2011,13(5):454-457.
[4] TAVEIRA L V,MACAK J M,TSUCHIYA H,et al.Initiation and growth of self-organized TiO2 nanotubes anodically formed in NH4F/(NH4)2SO4 electrolytes[J].Journal of the Electrochemical Society,2005,152(10):B405-B410.
[5] LAI Y,GONG J,LIN C.Self-organized TiO2 nanotube arrays with uniform platinum nanoparticles for highly efficient water splitting[J].International Journal of Hydrogen Energy,2012,37(8):6438-6446.
[6] 芮海龙,崔纪琨,王智文,等.阳极氧化法制备 TiO2 薄膜及光电化学性能研究[J].化工科技,2017,25(2):21-25.
[7] DAI G,LIU S,LIANG Y,et al.Synthesis and enhanced photoelectrocatalytic activity of p-n junction Co3O4/TiO2 nanotube arrays[J].Applied Surface Science,2013,264:157-161.
[8] HUANG B,YANG W,WEN Y,et al.Co3O4-modified TiO2 nanotube arrays via atomic layer deposition for improved visible-light photoelectrochemical performance[J].ACS Appl Mater Interfaces,2015,7(1):422-431.
[9] HUANG L,HU X,YUAN S,et al.Photocatalytic preparation of nanostructured MnO2-(Co3O4)/TiO2 hybrids:The formation mechanism and catalytic application in SCR deNOx reaction[J].Applied Catalysis B:Environmental,2017,203:778-788.
[10] 张飞龙,郭景丽,罗鹏飞,等.纳米Cu2O的合成及其光催化性能研究[J].化工科技,2017,25(1):59-63.
[11] ZHANG L,LI Y,ZHANG Q,et al.Well-dispersed Pt nanocrystals on the heterostructured TiO2/SnO2 nanofibers and the enhanced photocatalytic properties[J].Applied Surface Science,2014,319:21-28.
[12] CHA G,SCHMUKI P,ALTOMARE M.Free-standing membranes to study the optical properties of anodic TiO2 nanotube layers[J].Chemistry-An Asian Journal,2016,11(5):789-797.
[13] SO S,HWANG I,RIBONI F,et al.Robust free standing flow-through TiO2 nanotube membranes of pure anatase[J].Electrochemistry Communications,2016,71:73-78.
[14] CHENG X,LIU H,CHEN Q,et al.Construction of N,S codoped TiO2 NCs decorated TiO2 nano-tube array photoelectrode and its enhanced visible light photocatalytic mechanism[J].Electrochimica Acta,2013,103:134-142.
[15] 陈丽铎.磁性铋基材料的合成及其光催化性能的研究[D].大庆:东北石油大学,2016.
[16] AI G,MO R,LI H,et al.Cobalt phosphate modified TiO2 nanowire arrays as co-catalysts for solar water splitting[J].Nanoscale,2015,7(15):6722-6728.
[17] RAMAKRISHNAN V,KIM H,PARK J,et al.Cobalt oxide nanoparticles on TiO2 nanorod/FTO as a photoanode with enhanced visible light sensitization[J].RSC Advances,2016,6(12):9789-9795.