沸石-Cu_2O复合材料的制备及其光催化研究
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摘要
以CuSO4·5H2O和葡萄糖为原料,以13-X型沸石为载体,采用水浴法制备了沸石-Cu2O纳米复合材料.用X射线衍射(XRD)、扫描电镜(FESEM)、X光电子能谱(XPS)对其进行了表征,表明粒径为400nm左右纯的Cu2O微粒均匀地分散在沸石中.以模拟太阳光灯为光源,对亚甲基蓝溶液进行光催化降解实验,在最佳条件下降解1h,降解率可达到99.8%,表明沸石-Cu2O复合材料在可见光区具有良好的催化活性.该催化剂重复使用4次后降解率还比较高,而且依旧保持立方晶型、没有被氧化成CuO,证明所合成的催化剂物理化学性质都比较稳定.
zeolite-cuprous oxide nano-composite material was prepared by the hydrothermal synthesis method using Copper Sulfate Pentahydrate,glucose as raw material and 13-X zeolite as supporter in the solvent of distilled water.Their micro-structures were characterized by using XRD,FESEM and XPS techniques.It has been found that particle size of pure Cu2 O which is dispersed evenly in zeolite is approximately 400nm.Simulated sunlight was employed to investigate the photocatalysis behavior of the zeolite-cuprous oxide samples.Under optimal conditions for 1h,the decolorization efficiencies of methylene blue can reached 99.8%,which proves that sample has a higher adsorption capacity in visible solar.Recycling use of the catalyst revealed that Cu2O still has a high photocatalytic efficiency when repeatedly used for four times.Cu2O nanoparticles still kept its cubic crystal phase,and no sample oxidized to be CuO after the photocatalysis which showed that it has stable physical and chemical properties
zeolite-cuprous oxide nano-composite material was prepared by the hydrothermal synthesis method using Copper Sulfate Pentahydrate,glucose as raw material and 13-X zeolite as supporter in the solvent of distilled water.Their micro-structures were characterized by using XRD,FESEM and XPS techniques.It has been found that particle size of pure Cu2 O which is dispersed evenly in zeolite is approximately 400nm.Simulated sunlight was employed to investigate the photocatalysis behavior of the zeolite-cuprous oxide samples.Under optimal conditions for 1h,the decolorization efficiencies of methylene blue can reached 99.8%,which proves that sample has a higher adsorption capacity in visible solar.Recycling use of the catalyst revealed that Cu2O still has a high photocatalytic efficiency when repeatedly used for four times.Cu2O nanoparticles still kept its cubic crystal phase,and no sample oxidized to be CuO after the photocatalysis which showed that it has stable physical and chemical properties
引文
[1]余刚,杨志华,朱万鹏.染料废水物理化学脱色技术的现状与进展[J].环境科学,1994,15(4):75-79.
[2]奚旦立,孙裕生,刘秀英.环境监测(修订版)[M].北京:高等教育出版社,1995:406-407.
[3]魏明真,霍建振,伦宁,等.一种新型的半导体光催化剂-纳米氧化亚铜[J].材料导报,2007,21(6):30-133.
[4]TAN Y W,XUE X Y,PENG Q,et al.Controllable fabrication and electrical performance of single crystalline Cu2O nanowires with high aspect ratios[J].Nano Lett,2007,7(12):3723.
[5]ZHANG H G,ZHU Q S,ZHANG Y,et al.On epot synthesis and hierarchical assembly of hollow Cu2O microspheres with nanocrystals-composed porous multishell and their gassensing properties[J].Adv Funct Mater,2007,17(15):2766.
[6]YONEYAMA H,HAGA S,YAMANAKA S.Photocatalytic activities of microcrystalline titania incorporated in sheet silicates of clay[J].Journal of Physical Chemistry,1989,93:4833-4837.
[7]NOZAWA M,TANIGAWA K,HOSOMI M,et al.Removal and decomposition of malodorants by using titanium dioxide photocatalyst supported on fiber activated carbon[J].Water Science and Technology,2002,44:127-133.
[8]刘芬,赵志娟,邱丽美,等.XPS光电子峰和俄歇电子峰峰位表[J].分析测试技术与仪器,2009,15(1):1-17.
[9]SUN W,SUN W D,ZHUO Y J,et al.Facile synthesis of Cu2O nanocube/polycarbazole composites and their high visible-light photocatalytic properties[J].Journal of Solid State Chemistry,2011,184:1638-1643.
[10]ICHIURA H,KITAOKA T.Removal of indoor polluants under UV irradiation by a composite TiO2-zeolite sheet prepared using apapermaking technique[J].Chemosphere,2003,50(1):79-83.
[2]奚旦立,孙裕生,刘秀英.环境监测(修订版)[M].北京:高等教育出版社,1995:406-407.
[3]魏明真,霍建振,伦宁,等.一种新型的半导体光催化剂-纳米氧化亚铜[J].材料导报,2007,21(6):30-133.
[4]TAN Y W,XUE X Y,PENG Q,et al.Controllable fabrication and electrical performance of single crystalline Cu2O nanowires with high aspect ratios[J].Nano Lett,2007,7(12):3723.
[5]ZHANG H G,ZHU Q S,ZHANG Y,et al.On epot synthesis and hierarchical assembly of hollow Cu2O microspheres with nanocrystals-composed porous multishell and their gassensing properties[J].Adv Funct Mater,2007,17(15):2766.
[6]YONEYAMA H,HAGA S,YAMANAKA S.Photocatalytic activities of microcrystalline titania incorporated in sheet silicates of clay[J].Journal of Physical Chemistry,1989,93:4833-4837.
[7]NOZAWA M,TANIGAWA K,HOSOMI M,et al.Removal and decomposition of malodorants by using titanium dioxide photocatalyst supported on fiber activated carbon[J].Water Science and Technology,2002,44:127-133.
[8]刘芬,赵志娟,邱丽美,等.XPS光电子峰和俄歇电子峰峰位表[J].分析测试技术与仪器,2009,15(1):1-17.
[9]SUN W,SUN W D,ZHUO Y J,et al.Facile synthesis of Cu2O nanocube/polycarbazole composites and their high visible-light photocatalytic properties[J].Journal of Solid State Chemistry,2011,184:1638-1643.
[10]ICHIURA H,KITAOKA T.Removal of indoor polluants under UV irradiation by a composite TiO2-zeolite sheet prepared using apapermaking technique[J].Chemosphere,2003,50(1):79-83.