CAJ | 학술논문

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3 h，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。
이용수열법제비료ZnO/ZnFe2O4납미복합입자。용소묘전자현미경(SEM)、X사선연사(XRD)、광치발광광보(PL)대퇴화전후적ZnO/ZnFe2O4납미입자진행표정。연구결과표명，퇴화후적ZnO/ZnFe2O4납미복합입자표현출경호적형모화정체질량，주요유륙각섬자광결구적ZnO화립방결구적ZnFe2O4구성。PL광보현시，퇴화후ZnO근대변적발광강도명현강저，저시유우ZnO/ZnFe2O4형성료Ⅱ형능대결구실현료광생재류자분리적결과。대기광최화특성야진행료연구，광조시간위3 h，퇴화후적ZnO/ZnFe2O4납미복합입자표현출경우수적광최화활성，강해갑기등적효솔가체50.48%。령외，환대기자성진행료연구，실온조건하，납미복합입자표현위순자성，이경과퇴화처리후표현출철자성。인차，ZnO/ZnFe2O4납미복합입자경퇴화후구비자성광최화제성능，유일정적발전전경。
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 theannealed 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/ZnFe2O4 were also investigated, the synthesized nanoparticles were paramagnetic at room temperature, and the annealed nanoparticles were ferromagnetic. In conclusion, the annealed ZnO/ZnFe2O4 nanoparticles may have a great potential in the magnetic photocatalytic fields.