Coordination Complex Transformation-Assisted Fabrication for Hollow Chestnut-Like Hierarchical ZnS with Enhanced Photocatalytic Hydrogen Evolution

Nanomaterials. 2019;9(2):273 DOI 10.3390/nano9020273

 

Journal Homepage

Journal Title: Nanomaterials

ISSN: 2079-4991 (Print)

Publisher: MDPI AG

LCC Subject Category: Science: Chemistry

Country of publisher: Switzerland

Language of fulltext: English

Full-text formats available: PDF, HTML

 

AUTHORS


Leilei Xu (State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China)

Yuwei Ao (State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China)

Bin Guan (State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China)

Yun Xiang (State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China)

Jianguo Guan (State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 11 weeks

 

Abstract | Full Text

Hierarchical nanostructures (HNs) are possibly endowed with novel properties due to their complex three-dimensional (3D) structures. Here, we provide a novel stepwise growth strategy of Coordination Complex Transformation-Assisted Growth for fabricating HNs. By using this, we prepare a new wurtzite ZnS HNs-hollow chestnut-like hierarchical microspheres (HCHMs), which are mesoporous hollow microspheres with single crystalline nanorods arrayed densely and radially from the centre. The HCHMs formation depends on the stepwise decomposition of the two Zn<sup>2+</sup> complexes ([Zn(en)<sub>m</sub>(H<sub>2</sub>O)<sub>2(3&#8722;m)</sub>]<sup>2+</sup> and [Zn(en)<sub>m</sub>(NH<sub>3</sub>)<sub>2(3&#8722;m)</sub>]<sup>2+</sup>, natural number m &lt; 3). As the reaction proceeds, [Zn<sup>2+</sup>] has been distinctly reduced due to the transformation from [Zn(en)<sub>m</sub>(H<sub>2</sub>O)<sub>2(3&#8722;m)</sub>]<sup>2+</sup> to [Zn(en)<sub>m</sub>(NH<sub>3</sub>)<sub>2(3&#8722;m)</sub>]<sup>2+</sup> with a high stability constant, leading to a low crystal growth rate to obtain single crystalline nanorods. Additionally, the generated bubbles (CO<sub>2</sub>, NH<sub>3</sub>) acting as a template can induce the generation of hollow structure. The as-prepared ZnS HCHMs show an enhanced photocatalytic hydrogen evolution activity due to the single crystalline wurtzite phase and the high surface area contributed by the hollow hierarchical structures, as well as the mesoporosity. The versatility of the coordination complex transformation-assisted growth strategy will open up new possibilities for fabricating HNs, especially for those transition metal ions with excellent complex capabilities.