Zn2+/纳米二硫化钼插层复合物制备及其光催化性能研究

Preparation and photocatalytic properties of Zn2+/nano MoS2 intercalation compounds

摘要:

为了提高二硫化钼光催化性能，通过剥离-插层-重堆积法制备了Zn2+/纳米二硫化钼插层复合催化剂. 采用XRD、SEM及UV对样品进行表征，并研究了复合催化剂在太阳光下催化降解甲基橙的性能. 结果表明，制备的复合催化剂晶型良好，层间距增大为4.3934 nm，粒径增大为13.1nm，并出现新的插层特征峰（001）；Zn2+颗粒非均匀的负载在二硫化钼纳米片的表面，且主要分布于片层较小区域;对紫外-可见光有明显的吸收，且吸收强度于二硫化钼粉体；同时复合催化剂在太阳光下对甲基橙的催化降解性能从一开始就远高于纳米MoS2粉体，且降解效率成线性关系，并在6h时的降解效率达到70.435%.

Abstract:

In order to improve the photocatalytic performance of molybdenum disulfide,Zn2+/nano-molybdenum disulfide intercalation composite catalyst was prepared by stripping-intercalation-re-stacking method. The microstructures of the composite catalysts were analyzed by SEM,UV-Vis and XRD; The performance of composite catalyst for catalytic degradation of methyl orange in sunlight was also studied.The results show that the prepared Zn2+/ nano - molybdenum disulfide intercalation composite catalyst has a good crystal form, the interlayer spacing increases to 4.3934 nm, the particle size increases to 13.1 nm, and a new intercalation characteristic peak (001) appears. The prepared composite catalyst has a lamellar structure, and the non - uniform loading of Zn2 + nanoparticles is on the surface of molybdenum disulfide nanosheets and is mainly distributed in the smaller regions of the lamellae. The absorption of UV-Visible light is obviously higher than that of molybdenum disulfide powder and has the absorption peak. It is proved that the catalytic performance of the composite catalyst in the sunlight is much higher than that of the nanometer MoS2 powder from the beginning, and the degradation efficiency is linear and can reach 70.435% at 6h.