Design of ultrathin nanosheet subunits ZnIn2S4 hollow nanocages with enhanced photoelectric conversion for ultrasensitive photoelectrochemical sensing

Jingjun Peng; Jianying Yang; Bei Chen; Shanshan Zeng; Delun Zheng; Yaowen Chen; Wenhua Gao

doi:10.1016/j.bios.2020.112873

Design of ultrathin nanosheet subunits ZnIn₂S₄ hollow nanocages with enhanced photoelectric conversion for ultrasensitive photoelectrochemical sensing

Biosens Bioelectron. 2021 Mar 1:175:112873. doi: 10.1016/j.bios.2020.112873. Epub 2020 Dec 2.

Authors

Jingjun Peng¹, Jianying Yang², Bei Chen³, Shanshan Zeng¹, Delun Zheng¹, Yaowen Chen¹, Wenhua Gao⁴

Affiliations

¹ Department of Chemistry and Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong, 515063, PR China.
² National Detergents and Cosmetics Products Quality Supervision and Inspection Center (Guangdong), Shantou, Guangdong, 515041, PR China.
³ Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Shantou, Guangdong, 515063, PR China.
⁴ Department of Chemistry and Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong, 515063, PR China; Chemistry and Chemical Engineering Guangdong Laboratory, Shantou, Guangdong, 515041, PR China. Electronic address: whgao@stu.edu.cn.

PMID: 33298338
DOI: 10.1016/j.bios.2020.112873

Abstract

Herein, a high-efficiency photoactive material, hollow ZnIn₂S₄ nanocages (ZIS-HNCs) composed of ultrathin nanosheets were creatively synthesized via a metal-organic framework (MOF) derived solvothermal method. It had been specified the underlying mechanism of the ZIS-HNCs evolution under the MOF templated surface. Subsequently, the obtained ZIS-HNCs combined with annealing TiO₂ modified electrode (ZIS-HNCs@TiO₂), and the ZIS-HNCs@TiO₂ exhibited intense transient photocurrent. The enhanced photocurrent signal benefited from the multiple light capture effect of ZIS-HNCs, ultrathin nanosheet subunits of ZIS-HNCs, and typical type Ⅱ heterojunction, which could effectively retard the photoexcited electron-hole pairs recombination, and accelerated charge separation and transfer. Taking antibiotic lincomycin (Lin) as a model, a signal-off photoelectrochemical (PEC) aptasensor based on the ZIS-HNCs@TiO₂ was established and manifested a high sensitive detection for Lin with a linear response range from 0.0001 to 0.1 nM as well as an ultralow detection limit of 0.084 pM. Additionally, the proposed PEC aptasensor showed acceptable stability and remarkable selectivity. Therefore, this study provides a promising strategy to design nanomaterials with superior photoelectric activity for PEC sensing applications.

Keywords: Hollow structure; Lincomycin; Photoelectrochemical aptasensor; Ultrathin nanosheet; ZnIn(2)S(4).

MeSH terms

Anti-Bacterial Agents
Biosensing Techniques*
Electrochemical Techniques
Lincomycin
Nanostructures*

Substances

Anti-Bacterial Agents
Lincomycin