具有紫外-可见光催化性能的片状SnO_2/ZnO复合物的制备（英文）
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摘要
以氯化锌、氯化锡和氢氧化钠为反应物,通过前驱体煅烧法成功制得了片状单分散SnO_2/ZnO复合物。用X射线衍射仪(XRD)、场发射扫描电子显微镜(FESEM)及紫外-可见漫反射光谱(UV-Vis DRS)等多种手段对产物进行表征。以甲基橙(MO)和亚甲基蓝(MB)为目标降解物,研究了紫外-可见光照下所制SnO_2/ZnO复合物的光催化活性。实验结果显示,SnO_2/ZnO复合物较纯ZnO表现出了更高的光催化活性。SnO_2与ZnO的摩尔比为1∶3时,复合物光催化降解甲基橙的活性最高;SnO_2与ZnO的摩尔比为1∶4时,复合物光催化降解亚甲基蓝的效果最好。同时,SnO_2/ZnO复合光催化剂还具有良好的循环使用稳定性。SnO_2/ZnO复合物的优异性能主要归因于SnO_2与ZnO间的协同效应。
With zinc chloride,stannic chloride and sodium hydroxide as reactants,dispersed SnO_2/ZnO composites with platelike shape were successfully synthesized by calcining the precursors.The X-ray diffractometer(XRD),field emission scanning electron microscope(FESEM)and UV-Vis diffuse reflectance spectra(UV-Vis DRS)were used to characterize the products.Photocatalytic activity of the as-prepared SnO_2/ZnO composites was researched by utilizing methyl orange(MO)and methylene blue(MB)as degradation agents under UV-Vis light irradiation.The experiment result shows that SnO_2/ZnO composites show higher photocatalytic activity compared with pure ZnO.The composite exhibits the highest activity for the photocatalytic degradation of MO when the mole ratio of SnO_2 to ZnO is 1∶3,while it does the highest activity for that of MB when the mole ratio is 1∶4.Moreover,the SnO_2/ZnO composites photocatalysts also show excellent circulation stability.The excellent performance of SnO_2/ZnO composites is mainly attributed to the synergistic effect between SnO_2 and ZnO.
With zinc chloride,stannic chloride and sodium hydroxide as reactants,dispersed SnO_2/ZnO composites with platelike shape were successfully synthesized by calcining the precursors.The X-ray diffractometer(XRD),field emission scanning electron microscope(FESEM)and UV-Vis diffuse reflectance spectra(UV-Vis DRS)were used to characterize the products.Photocatalytic activity of the as-prepared SnO_2/ZnO composites was researched by utilizing methyl orange(MO)and methylene blue(MB)as degradation agents under UV-Vis light irradiation.The experiment result shows that SnO_2/ZnO composites show higher photocatalytic activity compared with pure ZnO.The composite exhibits the highest activity for the photocatalytic degradation of MO when the mole ratio of SnO_2 to ZnO is 1∶3,while it does the highest activity for that of MB when the mole ratio is 1∶4.Moreover,the SnO_2/ZnO composites photocatalysts also show excellent circulation stability.The excellent performance of SnO_2/ZnO composites is mainly attributed to the synergistic effect between SnO_2 and ZnO.
引文
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[3]RASHAD M M,ISMAIL A A,OSAMA I,et al.Photocatalytic decomposition of dyes using ZnO doped SnO2nanoparticles prepared by solvothermal method[J].Arabian Journal of Chemistry,2014,7(1):71-77.
[4]ZHENG L R,ZHENG Y H,CHEN C Q,et al.Network structured SnO2/ZnO heterojunction nanocatalyst with high photo catalytic activity[J].Inorganic Chemistry,2009,48(5):1819-1825.
[5]ESLAMI A,NASSERI S,YADOLLAHI B,et al.Photocatalytic degradation of methyl tert-butyl ether(MTBE)in contaminated water by ZnO nanoparticles[J].Journal of Chemical Technology&Biotechnology,2008,83(11):1447-1453.
[6]PRASANNALAKSHMI P,SHANMUGAM N.Fabrication of TiO2/ZnO nanocomposites for solar energy driven photocatalysis[J].Materials Science in Semiconductor Processing,2017,61:114-124.
[7]XIE J,ZHANG L,LI M X,et al.α-Fe2O3 modified ZnOflower-like microstructures with enhanced photocatalytic performance for pentachlorophenol degradation[J].Ceramics International,2015,41(8):9420-9425.
[8]HARISH S,ARCHANA J,SABARINATHAN M,et al.Controlled structural and compositional characteristic of visible light active ZnO/CuO photocatalyst for the degradation of organic pollutant[J].Applied Surface Science,2017,418:103-112.
[9]XIE J,ZHOU Z,LIAN Y W,et al.Simple preparation of WO3-ZnO composites with UV-Vis photocatalytic activity and energy storage ability[J].Ceramics International,2014,40(8):12519-12524.
[10]HAMROUNI A,LACHHEB H,HOUAS A.Synthesis,characterization and photocatalytic activity of ZnO-SnO2nanocomposites[J].Materials Science and Engineering:B,2013,178(20):1371-1379.
[11]KUZHALOSAI V,SUBASH B,SENTHILRAJA A,et al.Synthesis,characterization and photocatalytic properties of SnO2-ZnO composite under UV-A light[J].Spectrochimica Acta:A,2013,115:876-882.
[12]KO J H,KIM I H,KIM D,et al.Transparent and conducting Zn-Sn-O thin films prepared by combinatorial approach[J].Applied Surface Science,2007,253(18):7398-7403.
[13]PASCARIU P,AIRINEI A,OLARU N,et al.Photocatalytic degradation of Rhodamine B dye using ZnO-SnO2electrospun ceramic nanofibers[J].Ceramics International,2016,42(6):6775-6781.
[14]XU M Z,JIA S L,CHEN C,et al.Microwave-assistant hydrothermal synthesis of SnO2@ZnO hierarchical nanostructures enhanced photocatalytic performance under visible light irradiation[J].Materials Research Bulletin,2018,106:74-80.
[15]HUANG X,SHANG L,CHEN S,et al.Type-II ZnO nanorod-SnO2 nanoparticle heterostructures:characterization of structural,optical and photocatalytic properties[J].Nanoscale,2013,5(9):3828-3833.
[16]ZHENG Y,LUO C,LIU L,et al.Synthesis of hierarchical TiO2/SnO2 photocatalysts with different morphologies and their application for photocatalytic reduction of Cr(VI)[J].Materials Letters,2016,181:169-172.
[17]ZHANG J,LIU Z H,LIU Z F.Novel WO3/Sb2S3heterojunction photocatalyst based on WO3of different morphologies for enhanced efficiency in photoelectrochemical water splitting[J].ACS Applied Materials&Interfaces,2016,8(15):9684-9691.
[18]XIE J,LI Y T,ZHAO W,et al.Simple fabrication and photocatalytic activity of ZnO particles with different morphologies[J].Powder Technology,2011,207(1/2/3):140-144.
[19]WANG H H,BAEK S,LEE J,et al.High photocatalytic activity of silver-loaded ZnO-SnO2 coupled catalysts[J].Chemical Engineering Journal,2009,146(3):355-361.