【摘要】 半导体材料作为电子信息材料的一种，因具有较宽的禁带宽度和高的载流子迁移率成为了人们关注的热点材料之一。通过水热法制备了不同质量分数Ag掺杂（0,1%,3%,5%,7%）的MoS₂复合材料，采用XRD、SEM、UV-Vis、FT-IR、Raman和催化性能分析等手段对Ag掺杂MoS₂复合材料的晶体结构、微观形貌、光谱性能和催化性能进行了测试与表征。结果表明，水热法合成了单一相的六方晶系MoS₂,Ag成功掺杂到了MoS₂中。Ag掺杂的MoS₂复合材料为纳米片堆积形成的圆球状结构，Ag掺杂增大了MoS₂纳米球的直径，尺寸在300～350 nm之间。Ag的掺杂诱导了MoS₂的晶型从2H-MoS₂相结构向1T-MoS₂相结构转变，1T-MoS₂相结构的晶型含量增加。MoS₂复合材料对于可见光和紫外光的吸收能力增强，5%（质量分数）Ag掺杂的MoS₂复合材料的吸收强度最高。Ag的掺杂显著提高了MoS₂的光催化活性，在光照120 min时，5%（质量分数）Ag掺杂的MoS₂复合材料对RhB的降解效率达到了最大值92.79%,相比纯MoS₂,降解效率提高了129.74%,Ag掺杂MoS₂复合材料在光催化降解方面有着潜在的应用价值。更多还原

【Abstract】 As a kind of electronic information materials, semiconductor materials have become one of the hot topics because of their wide band gap and high carrier mobility. MoS₂ composites with different mass fractions of Ag doped（0, 1%, 3%, 5%, 7%） were prepared by hydrothermal method. XRD, SEM, UV-Vis, FT-IR, Raman and catalytic performance analysis were used to test and characterize the crystal structure, microscopic morphology, spectral performance and catalytic performance of Ag-doped MoS₂ composite. The results showed that mono-phase hexagonal MoS₂ was synthesized by hydrothermal method, and Ag was successfully doped into MoS₂. The Ag-doped MoS₂ composite was a spherical structure formed by the stacking of nano-sheets. Ag doping increased the diameter of MoS₂ nanosphere with the size between 300 and 350 nm. Ag doping induced the crystal form of MoS₂ to change from 2H-MoS₂ phase structure to 1T-MoS₂ phase structure, and the crystal form content of 1T-MoS₂ phase structure increased. The absorption ability of MoS₂ composites for visible and ultraviolet light was enhanced, and the absorption strength of MoS₂ composites doped with 5 wt% Ag was the highest. The doping of Ag significantly improved the photocatalytic activity of MoS₂. When the light was 120 min, the degradation efficiency of 5 wt% Ag-doped MoS₂ composites for RhB reached the maximum value of 92.79%, which was 129.74% higher than that of pure MoS₂. Ag-doped MoS₂ composite has potential application value in photocatalytic degradation.更多还原