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利用532nm脉冲激光对沉浸在去离子水及十二烷基硫酸钠(SDS)水溶液中的金属锌靶进行液相激光烧蚀,合成了ZnO纳米颗粒和Zn/ZnO核壳结构的纳米粒子.应用X射线衍射仪,透射电子显微镜,紫外可见光分光光度计和荧光光度计表征产物的微观结构和光学性能,并探讨其形成机理.结果表明:在去离子水中分别烧蚀2h和4h生成的ZnO纳米粒子的平均粒径分别为43nm和19nm.激光的长时间作用可以使纳米粒子粒径减小.在0.005mol/L的SDS水溶液中合成了Zn/ZnO核壳结构的纳米粒子,这是由于SDS的包裹作用而造成的.所得ZnO和Zn/ZnO纳米胶体溶液在蓝光区450nm(2.76eV)和绿光区558nm(2.22eV)处有发光峰.
ZnO nanoparticles and Zn / ZnO core-shell nanoparticles were synthesized by liquid-phase laser ablation of 532 nm pulsed laser at a metal zinc target immersed in deionized water and sodium dodecyl sulfate (SDS) solution. X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-visible spectrophotometer and fluorophotometer were used to characterize the microstructure and optical properties of the products. The results showed that the ZnO nanostructures were ablated in deionized water for 2 h and 4 h respectively The average particle size of the particles were 43nm and 19nm, respectively. The long-time laser irradiation can reduce the size of the nanoparticles.In the 0.005mol / L SDS aqueous solution, Zn / ZnO core-shell nanoparticles were synthesized, which is due to SDS The resulting ZnO and Zn / ZnO nanocolloid solutions have luminescence peaks at 450 nm (2.76 eV) in the blue region and at 558 nm (2.22 eV) in the green region.