【摘要】 本研究利用化学还原法制备了Cu₂O纳米球,以此作为模板通过液相硫化将其转变为空心的Cu₇S₄纳米球,并在Cu₇S₄纳米球溶液中加入适量的HAuCl₄·4H₂O,从而获得Cu₇S₄纳米球表面镶嵌金纳米粒子的Cu₇S₄@Au复合材料。以罗丹明B（Rh B）作为拉曼探针分子,研究Cu₇S₄@Au复合材料的表面增强拉曼（SERS）特性。结果表明,Cu₇S₄@Au复合材料具有较高的灵敏度和良好的检测重现性。此外,Cu₇S₄@Au基底还可用于检测致癌物苏丹III和孔雀石绿（MG）,其检测限（LOD）分别为3.71×10^-6和2.48×10^-7 mol/L （M）,该材料在食品安全监测方面具有应用潜力。更多还原

【Abstract】 Cu₂O nanospheres（NSs） were prepared by chemical reduction. Based on it, hollow Cu₇S₄ NSs were synthesized by the liquid sulfidation transformation of Cu₂O NSs, and followed by the addition of an appropriate amount of HAuCl₄·4 H₂O solution. Thus, a Cu₇S₄@Au composite was obtained with gold nanoparticles attached to the surface of Cu₇S₄ hollow NSs. Rhodamine B（Rh B） was used as Raman probe molecules to further explore the surface-enhanced Raman properties of the Cu₇S₄@Au composite. It is found that Cu₇S₄@Au composite has high sensitivity and good reproducibility. In addition, it was employed to detect carcinogens such as sudan III and malachite green（MG） with detection limits（LOD） of 3.71×10^-6 M and 2.48×10^-7 M, respectively. Therefore, the proposed material exhibits potential application prospects for food safety monitoring.更多还原