ZnO/ZnFe_2O_4复合纳米粒子的制备及其特性研究  

Growth and properties of ZnO/ZnFe_2O_4 nanoparticles

作　　者：高娴[1] 贾慧民[1] 方铉[1] 刘鹤[1] 唐吉龙[1] 房丹[1] 王双鹏[2] 赵海峰[2] 李金华[1] 方芳[1] 楚学影[1] 王菲[1] 王晓华[1] 徐莉[1] 马晓辉[1] 魏志鹏[1] 

机构地区：[1]长春理工大学高功率半导体激光国家重点实验室,吉林长春130022 [2]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《红外与激光工程》2015年第7期2110-2115,共6页Infrared and Laser Engineering

基　　金：国家自然科学基金(61076039;61204065;61205193;61307045);高等学校博士学科点专项科研基金(20112216120005);吉林省科技发展计划(20121816;201201116);高功率半导体激光国家重点实验室基金(9140C310101120C031115)

摘　　要：利用水热法制备了ZnO/ZnFe2O4纳米复合粒子。用扫描电子显微镜(SEM)、X射线衍射(XRD)、光致发光光谱(PL)对退火前后的ZnO/ZnFe2O4纳米粒子进行表征。研究结果表明,退火后的ZnO/ZnFe2O4纳米复合粒子表现出更好的形貌和晶体质量,主要由六角纤锌矿结构的ZnO和立方结构的ZnFe2O4构成。PL光谱显示,退火后ZnO近带边的发光强度明显降低,这是由于ZnO/ZnFe2O4形成了Ⅱ型能带结构实现了光生载流子分离的结果。对其光催化特性也进行了研究,光照时间为3h,退火后的ZnO/ZnFe2O4纳米复合粒子表现出更优秀的光催化活性,降解甲基橙的效率可达50.48%。另外,还对其磁性进行了研究,室温条件下,纳米复合粒子表现为顺磁性,而经过退火处理后表现出铁磁性。因此,ZnO/ZnFe2O4纳米复合粒子经退火后具备磁性光催化剂性能,有一定的发展前景。ZnO/ZnFe2O4 nanoparticles were syn thesized by hydrothermal and annealed method. X-ray diffraction（XRD）, scanning electron microscopy（SEM） and photoluminescence（PL） spectroscopy were used to characterize the synthesized and annealed ZnO/ZnFe2O4 nanoparticles. The results indicate that the synthesized nanoparticles are mainly composed of hexagon wurtzite ZnO and cubic ZnFe2O4, and the crystal quality is improved by annealing treatment. It is observed that the intrinsic photoluminescence attributed to the recombination of photogenerated carriers of ZnO was obviously weakened after annealing process, which confirms that a ZnO/ZnFe2O4 heterojunction was formed which could improve the separation of photogenerated carriers. Photocatalytic test ′ s results show the photocatalytic activity of the annealed ZnO/ZnFe2O4 nanoparticles is better than the synthesized, and the photocatalytic degradation ratio of MO is 50.48% under 3 hours′ UV-illumination. The magnetic properties of the annealed ZnO/Zn Fe2O4 were also investigated, the synthesized nanoparticles were paramagnetic at room temperature, and the annealed nanoparticles were ferromagnetic. In conclusion, the annealed ZnO/Zn Fe2O4 nanoparticles may have a great potential in the magnetic photocatalytic fields.

关 键 词：ZNO ZNFE2O4 纳米复合结构 光催化特性 

分 类 号：O472.3[理学—半导体物理]