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以CuCl2为铜源,(NH2)2CS为硫源,C2H6O2-NH3·H2O混合溶液为溶剂,采用溶剂热法合成CuS晶体材料,通过X射线衍射谱(XRD)、荧光光谱、紫外可见漫反射光谱(UV-Vis)和傅里叶变换红外光谱(FT-IR)对合成产物的晶体结构和光学性能进行研究,并对部分合成工艺条件对合成产物的光吸收性能的影响进行分析。研究结果表明,溶剂热法所制备样品为纯六角相靛铜矿CuS晶体。荧光光谱显示CuS晶体在470.8、498.4、577.6nm处存在三个较强的蓝光及绿光PL发射峰。紫外可见漫反射光谱显示,合成工艺条件显著影响着所制备样品的光吸收性能,在反应体系中反应物浓度为0.30mol/L,铜与硫的摩尔比为3∶2,溶剂中乙二醇与氨水体积比为4∶1的条件下于140℃下保温2h,即可获得近红外区光吸收性能较优的产物。
The CuSAs were synthesized by solvothermal method using CuCl2 as the copper source, (NH2) 2CS as the sulfur source and C2H6O2-NH3 · H2O as the solvent. The X-ray diffraction (XRD), fluorescence spectra and UV-Vis diffuse reflectance spectra (UV-Vis) and Fourier Transform Infrared Spectroscopy (FT-IR) were used to study the crystal structure and optical properties of the synthesized product. The effects of partial synthesis conditions on the light absorption properties of the synthesized product were also analyzed. The results show that the samples prepared by solvothermal method are pure hexagonal phase Cu Cu crystals. Fluorescence spectra showed that there were three strong blue and green PL emission peaks at 470.8, 498.4 and 577.6 nm for CuS crystals. UV-visible diffuse reflectance spectroscopy showed that the synthesis conditions significantly affect the light absorption properties of the prepared samples. The concentration of the reactants in the reaction system was 0.30mol / L, the molar ratio of copper to sulfur was 3: 2, the molar ratio of ethylene glycol And ammonia volume ratio of 4: 1 under the conditions of 140 ° C for 2h, you can get better absorption properties of the product near the infrared region.