纳米硫化锌的制备及光谱分析

采用超重力反应结晶法制备了纳米硫化锌粒子,并通过透射电子显微镜(TEM)、X射线粉末衍射仪(XRD)、X射线光电子能谱仪(XPS)、傅里叶红外光谱仪(FTIR)、紫外-可见光分光光度计(UV-Vis)和X射线能谱仪(EDX)对纳米硫化锌的形貌、结构、组成和光谱性能进行了细致分析.结果表明:超重力反应结晶法制备的纳米硫化锌粒子为球形,平均粒径为42 nm;XRD图谱表明纳米硫化锌呈现较好的闪锌矿晶型;XPS能谱表明纳米硫化锌的S(2p)的电子结合能为162.6 eV,Zn的2p3/2,2p1/2的电子结合能分别为1 021.4,1 044.6 eV.红外光谱研究表明纳米硫化锌在400～4 000 cm-1范围内具有良好的红外透过率.紫外-可见光谱研究发现纳米硫化锌在200～340 nm的紫外区域有较强的吸收,其禁带宽度为3.57 eV.EDX能谱表明该法制备的纳米硫化锌具有较高的纯度.

Preparation and Spectra Analysis of Nano-ZnS

The nano-zinc sulfide was prepared in RPBR(rotating packed bed reactor) using zinc nitrate and hydrogen sulfide as the raw materials.The size and morphology, crystal structure,composition and optical properties of the nano-zinc sulfide were analyzed by transmission electron microscopy(TEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),Fourier transform infrared spectrometry(FTIR),UV-visible spectrophotometer and energy dispersive X-ray detector(EDX).The results show that the nano-zinc sulfide particles are spherical and their average size is about 42 nm.The XRD pattern shows that the nano-zinc sulfide is in a good sphalerite crystal phase.The XPS spectra show that the binding energy of the S(2p) is 162.6 eV,while those of the Zn 2p3/2 and 2p1/2 are 1 021.4 and 1 044.6 eV respectively.The IR spectrum shows that the nano-zinc sulfide has good transmittance within the wavelength number range from 400 to 4 000 cm-1.The UV-Vis spectrum shows that the nano-zinc sulfide has strong absorption within the wavelength range from 200 to 340 nm.The optical gap of the nano-zinc sulfide is 3.57 eV by calculation.The EDX spectrum shows that the nano-zinc sulfide has high purity.