InOOH纳米晶的控制合成及其液相光催化性能

摘要

以硝酸铟作为前驱体,在蒸馏水和乙二胺的混合溶剂中制备出了InOOH纳米晶,详细地考察了反应溶剂及温度对终产物的影响.利用X射线粉末衍射(XRD)、紫外-可见漫反射光谱(UV-Vis DRS)、扫描电子显微镜(SEM)和透射电镜(TEM)对样品的晶相结构、光吸收性质及其形貌进行了详细的表征.考察了样品在紫外光下及可见光下对液相中的染料罗丹明B(RhB)的光催化降解性能.发现InOOH在紫外光下可以彻底分解RhB,而在可见光下只能使RhB脱色.InOOH在紫外光和可见光下对RhB的分解遵循两种不同的反应机制.%Nanocrystalline InOOH photocatalyst was synthesized from In (NO_3)_3 and ethylenediamine via a solvothermal method. The obtained sample was characterized by X-ray diffraction(XRD), UV-Vis diffuse reflectance spectroscopy(DRS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). InOOH can degrade rhodamine B (RhB) to CO_2 and H_2O under UV irradiation, while it can only degrade RhB to de-ethylated product under visible-light irradiation. The photocatalytic degradation of RhB follows two different reaction mechanisms under UV light and visible light.