Cu掺杂空心异质结TiO_(2)/Zn_(0.3)Cd_(0.7)S的光催化还原性能研究

该文设计一种基于Cu掺杂空心异质结TiO_(2)/Zn_(0.3)Cd_(0.7)S异质结空心球(Cu-TiO_(2)/ZCSHS)的双缺陷修饰光催化剂,用于CO_(2)光还原耦合芳香醇的选择性氧化。具有Zn空位的Zn_(0.3)Cd_(0.7)S纳米颗粒被原位锚定在Cu掺杂TiO_(2)(Cu-TiO_(2)HS)壳层的外部,保证ZCS与Cu-TiO_(2)的紧密接触。Cu-TiO_(2)/ZCSHS表现出比ZCS、TiO_(2)HS、Cu-TiO_(2)HS和TiO_(2)/ZCSHS更高的光催化活性,其光催化CO_(2)还原活性和选择性的增强主要是由于其丰富的表面缺陷和空心结构。

In this paper,a dual-defect modified photocatalyst based on Cu-doped hollow heterojunction TiO_(2)/Zn_(0.3)Cd_(0.7)S heterojunction hollow spheres(Cu-TiO_(2)/ZCS HS)was designed for the selective oxidation of CO_(2) photoreduction coupled with aromatic alcohols.Zn_(0.3)Cd_(0.7)S nanoparticles with Zn vacancies were in situ anchored outside the Cu-doped TiO_(2)(Cu-TiO_(2) HS)shell.The close contact between ZCS and Cu-TiO_(2) was ensured.Cu-TiO_(2)/ZCS HS exhibited higher photocatalytic activity than ZCS,TiO_(2) HS,Cu-TiO_(2) HS and TiO_(2)/ZCS HS.The enhancement of photocatalytic CO_(2)0 reduction activity and selectivity was mainly due to its abundant surface defects and hollow structure.