Cu_7S_4纳米管的生物分子辅助水热合成与光学性质(英文)  

Biomolecule-Assisted Hydrothermal Synthesis and Optical Properties of Cu_7S_4 Nanotubes

作　　者：郭培志[1] 韩光亭[1] 王宝燕[1] 赵修松[1,2] 

机构地区：[1]青岛大学化学化工与环境学院 纤维新材料与现代纺织国家重点实验室培育基地,山东青岛266071 [2]Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576

出　　处：《物理化学学报》2010年第9期2557-2562,共6页Acta Physico-Chimica Sinica

基　　金：supported by the National Natural Science Foundation of China(20803037);Doctoral Foundation of Shandong Province(2007BS04022);Natural Science Foundation of Shandong Province(ZR2009BM013);“Taishan Scholar”Program of Shandong Province,China~~

摘　　要：使用生物分子DL-甲硫氨酸辅助水热方法合成Cu7S4纳米管,产物的形貌与晶型可通过改变实验参数进行调控.研究表明,硝酸铜和DL-甲硫氨酸在反应开始时的配位比为1∶2,而且当反应物的摩尔比为1∶2和反应温度为200℃时可合成直径为100-600nm、长度达40-100μm的多晶Cu7S4纳米管.使用D-或L-甲硫氨酸均能得到类似Cu7S4纳米管.Cu7S4纳米管的禁带宽度为2.88eV,与Cu7S4的块体材料相比有明显蓝移.基于实验研究结果,讨论了甲硫氨酸分子中的官能团与反应产物之间的联系并提出了Cu7S4纳米管的自牺牲模板法形成机理.Cu7S4 nanotubes were synthesized using a biomolecule DL-methionine-assisted hydrothermal method.The morphology and phase of the products can be controlled by adjusting the reaction parameters such as synthesis temperature,reaction time and the molar ratio of the reagents.We found that uniform polycrystal Cu7S4 nanotubes with diameters of 100-600 nm and lengths of 40-100 μm can be controllably synthesized at 200℃ when the molar ratio of Cu（NO3）2 to DL-methionine in the synthesis system is 1：2.Similar Cu7S4 nanotubes can be obtained from D-or L-methionine systems.The bandgap energy of the Cu7S4 nanotubes was measured to be about 2.88 eV,a remarkable blue shift in comparison with that of bulk Cu7S4（2.0 eV）.We discussed the relationship between the products and the functional groups in the amphiphilic biomolecules.On the basis of our experimental data,we proposed that the Cu7S4 nanotubes were formed versus a self-sacrificing template mechanism.

关 键 词：水热合成 Cu7S4纳米管 甲硫氨酸 生物分子 

分 类 号：TB383.1[一般工业技术—材料科学与工程]