
第36卷第3期 2016年9月
化学传感器 CHEMICALSENSORS
李连柱状纳米氧化锌的制备及形成机理研究
由丽梅1,霍丽华2,程晓丽2,赵
辉2
(1.牡丹江医学院药学院,黑龙江牡丹江157011)
(2.黑龙江大学化学化工与材料学院,黑龙江哈尔滨150080)
Vol. 36, Na. 3 Sept.2016
摘要:以二水合乙酸锌和氢氧化钾为原料,十六烷基三甲基漠化铵(CTAB)为表面活性剂,采用水热法合成了李连柱状ZnO纳米粉体,通过X射线衍射仪(XRD)、扫描电镜(SEM)、红外光谱仪(IR)等对产物的物相、微观形貌及光学性质进行了分析。结果表明,产物属于纤锋矿型六方晶系的Zn0,平均直径约300nm,长约1μm,考察了反应时间、反应温度、所用碱溶液和锌源等对产物形貌和尺寸的影响,并对率连柱状ZnO的形成机理进行了研究。
关键调:李连柱状ZnO;水热法;形貌控制;形成机理
Preparation andformation mechanism researchof twined
column-likeZnOnanopowders You Li-mei", Huo Li-hua, Cheng Xiao-li, Zhao Hui?
(1. College of Pharmacy, Mudanjiang Medical College, Mudanjiang 157011, China)
(2. School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China)
Abstract: Zn(CH,COO),-2H,O and KOH were used to prepare twined columnlike ZnO nanopowders through a hydrothermal method with cetyl trimethyl ammonium bromide (CTAB) as surfactant, The phase composition, mi-crostructure and optical property of the products were analysized by Xray diffraction (XRD), scanning electron mi-croscope (SEM) and infrared spectrometer (IR). The results showed that the products belonged to hexagonal crystal cell and were uniform with the diameter of 300 nm and the length of 1 μm. The influences of the reactive time, tem-perature, alkali liquid and zinc source on the size and morphology of twined columnlike ZnO were investigated, and the possible formation mcchanism was also researched.
Key words: twined columnlike ZnO; hydrothermal method; morphology control; formation mechanism
化锌材料。如由丽梅等2]采用水热法制得了棒状
0
引言
氧化锌是一种具有六方纤锌矿结构的直接带隙宽禁带金属半导体材料,室温下禁带宽度为 3.37eV,激子结合能为60meV。由于氧化锌具有光降解、电致化学发光和光电化学性能而在光子器件、气体传感器及光催化等方面得以广泛应用,并已成为当前研究的热点(]。有研究表明,氧化锌的尺寸和形貌对其性能和应用有很大影响。因此,人们发展了多种方法制备出形貌各异的氧
基金项目:黑龙江省科技攻关项目(GZ11A103)
*通信联系人,Email:youlimei99@126.com 万方数据
结构的纳米Zn0;Li等[3在100℃水热条件下合成了三维花状ZnO微米球;Sendi等(4]将粒径均为40nm的ZnO纳米粒子加压后得到了高密度光盘状ZnO;Qi等(5)采用水热法在120℃下制备了ZnO纳米环;Cho等(6)采用原子层沉积法合成了ZnO纳米管;Wang等171在120℃水热条件下制备了多孔球状ZnO材料。而关于李连柱状纳米氧化锌的制备研究却未见报道。该研究以简单的水热法合成了李连柱状氧化锌纳米粉体,考察了