Study On The Preparation And Optical Limiting Properties Of Two-dimensional Materials Of Main Group Elements And Their Hybrid Glasses

Two-dimensional materials are a type of layered nanomaterials composed of a single layer or several layers of atoms,which have excellent chemical,physical and optoelectronic properties.And because of its unique structure,it also has a wide range of applications in the field of nonlinear optics.Especially in the field of optical limiting,the prospect of two-dimensional materials is very broad,but in practical applications,the prepared devices have the disadvantages of uneven doping,low doping concentration,and complicated preparation methods,which make its application in the field of optical limiting have many limitations.In response to the above problems,this paper prepared functionalized antimony,antimony oxide quantum dots and tellurium nanosheets three nanomaterials,and prepared different gel glass solidoptical limiting devices,and finally explored the optical limiting of solid glass devices based on two-dimensional materials.In the application.The specific research results are as follows:(1)Covalent silane functionalized antimonene nanosheets for optical limiting propertiesThe antimonene nanosheets are obtained by the liquid exfoliation method,and then the silane-functionalized antimonene is obtained by covalent reaction,and sol-gel copolymerization with the silane is carried out to obtain a homogeneous hybrid organically modified silicate gel glass.The prepared silane-functionalized antimony hybrid gel glass is more transparent and uniform,and the doping amount of Si-antimonene can reach 2%,which make Si-antimonene suitable for other organic or inorganic composite materials.In addition,antimonene exhibits excellent nonlinear optical and optical confinement properties in the visible and near infrared regions(532-2150 nm),the mechanism is a combination of nonlinear absorption,nonlinear refraction and nonlinear scattering.This gives it the potential for applications in many optical fields.(2)Study on antimonene oxide quantum dots and their optical limiting performanceAntimonene oxide quantum dots were prepared by liquid phase stripping of antimony,and their mixed gel glass was prepared.Due to the existence of hydroxyl groups on quantum dots and the small size of quantum dots,glass shows high transparency and uniformity,and the doping concentration can reach 0.20 wt%,which has great prospects in practical applications.The mechanism of optical limiting is found to be a combination of nonlinear absorption,nonlinear refraction,and nonlinear scattering.These nanosheets exhibit outstanding optical limiting performance in the visible and near-infrared regions(532-1064 nm).(3)Study on tellurene nanosheets and its nonlinear opticsThe tellurene nanosheets were prepared by liquid phase exfoliation using ethanol,and then the hybrid gel glass was prepared.The Z-scan result at 1064 nm showed saturated absorption,but its gel glass showed excellent optical limiting performance from 532 to 1064 nm,which shows the wideband optical limiting application of its solid-state device in the range of 532-1064 nm.