β-In_(2)Se_(3)的溶剂热合成及其光催化性能研究

Study on Solvothermal Synthesis and Photocatalytic Properties ofβ-In_(2)Se_(3)

β-In_(2)Se_(3)由于良好的迁移率和优异的光响应而被广泛应用于各个领域。然而,由于In_(2)Se_(3)有多种复杂的晶体结构和铟易水解,导致溶液法难以制备出层状β-In_(2)Se_(3)。采用氯化铟、硒粉和乙二胺为原料,通过溶剂热法制备了β-In_(2)Se_(3)粉体。利用拉曼光谱仪、傅里叶红外光谱仪、热重分析仪、扫描电子显微镜和荧光分光光度计等仪器对粉体的结构、形貌和光学性能进行了表征。以甲基橙溶液为降解物,研究了粉体的光催化性能。结果表明,所制备的粉体主要成分为β-In_(2)Se_(3),呈片层状结构;粉体在紫外光区和可见光区具有较好的吸光度,光学带隙约为2.01 eV,具有很好的荧光特性;β-In_(2)Se_(3)对甲基橙具有光催化性能,经过5 h的紫外线照射,对甲基橙的降解率可达到81%。该结果拓展了β-In_(2)Se_(3)在降解有机物污染物方面的应用。

β-In_(2)Se_(3) is widely used in various fields due to its good mobility and excellent photoresponse.However,Due to the fact that In_(2)Se_(3) has multiple complex crystal structures and indium is prone to hydro-lysis,it is difficult to prepare layeredβ-In_(2)Se_(3) in solution.Using InCl_(3),Se powder and ethylenediamine as raw materials,β-In_(2)Se_(3) powder was prepared by the solvothermal method.The structure,morphology and optical properties of the powder were characterized by Raman spectrometer,Fourier infrared spectrometer,thermogravimetric analyzer,scanning electron microscope and fluorescence spectrophotometer.The photocatalytic properties of the powders were investigated using methyl orange solution as the degradation substance.The results show that the main component of the prepared powder isβ-In_(2)Se_(3) with a layered structure.The powder has good absorption in the UV and visible light regions,with an optical bandgap of approximately 2.01 eV,and has excellent fluorescent properties.β-In_(2)Se_(3) powder exhibits photocatalytic activity towards methyl orange,and after 5 h of UV irradiation,the degradation rate of methyl orange can reach 81%.The result expands the application ofβ-In_(2)Se_(3) for the degradation of organic pollutants.