【摘要】 通过对碳纤维表面进行修饰,利用低温液相沉淀法制备了碳纤维/ZnO复合材料并对其结构、形貌和发光性能进行了研究.结果显示,样品的紫外-可见吸收峰约为376nm,相应的带隙宽度约为3.30eV.由样品的荧光光谱得出,样品除了具有位于384nm的微弱的近带边紫外发光峰之外,还有位于597nm的强的绿光发光带.样品经过退火之后,绿光峰降低.这可能归于ZnO中氧空位的减少.通过对原始样品和经过退火处理样品的荧光光谱的研究得出,样品的绿光发射归于氧空位.更多还原

【Abstract】 A core-shell structure material,carbon fiber/ZnO was prepared by a surface modification precipitation process in aqueous solution.The energy bandgap calculated from the absorptive spectra was about 3.30 eV.The study of PL spectra of the samples showed that there is a broad green emission band centered at 597 nm in the wavelength range 450-700 nm.Moreover,combined with the PL spectrum annealed in air,the green emission peak of the un-annealed samples was ascribed to the oxygen vacancies.更多还原