Microwave-assistant hydrothermal synthesis of SnO2@ZnO hierarchical nanostructures enhanced photocatalytic performance under visible light irradiation

被引：36

作者：

Xu, Manzhang ^{[1
]}

Jia, Shilong ^{[1
]}

Chen, Cheng ^{[1
]}

Zhang, Zhiyong ^{[1
]}

Yan, Junfeng ^{[1
]}

Guo, Yuxi ^{[1
]}

Zhang, Yanni ^{[1
]}

Zhao, Wu ^{[1
]}

Yun, Jiangni ^{[1
]}

Wang, Yingnan ^{[1
]}

机构：

[1] Northwest Univ, Sch Informat Sci & Technol, Xian 710127, Shaanxi, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2018年 / 106卷

基金：

中国国家自然科学基金;

关键词：

Microwave-assistant hydrothermal method; SnO2@ZnO composite materials; Hierarchical nanostructures; Visible light photocatalytic; Methylene blue; BAND-GAP; DEGRADATION; PHOTOLUMINESCENCE; UV; NANORODS; GROWTH; FILMS; TIO2;

D O I：

10.1016/j.materresbull.2018.05.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, for the first time, SnO2@ZnO hierarchical nanostructures (HNSs) were synthesized by a simple two-step microwave-assistant hydrothermal method. Systematical characterization of the SnO2@ZnO HNSs revealed that the ruffle SnO2 nanowires (NWs) were uniformly and tightly grown on the entire surface of each ZnO nanoflowers (NFs). The photocatalytic performance of the SnO2@ZnO HNSs showed a remarkably enhanced photocatalytic performance under visible light irradiation (400 nm <= lambda <= 800 nm). The photoluminescence (PL) spectrum results indicated that the defect related energy level is the main mechanism of the photocatalytic performance under the visible light irradiation. The unique morphology and heterojunction structures in SnO2@ZnO HNSs were the core enhanced mechanism in photodegradation process. The advantage endowed with the microwave-assistant hydrothermal method can result in the efficient spatial charge separation between ZnO nanorods (NRs) and SnO2 NWs and reduce the charge recombination along the heterojunction, which makes SnO2@ZnO HNSs a highly promising for photocatalytic applications.

引用

页码：74 / 80

页数：7