S‐induced Phase Change Forming In2O3/In2S3 Heterostructure for Photoelectrochemical Glucose Sensor

Author:

Wang Bingrong1,Zhang Nan1,Wang Yifeng1,Chen Delun1,Qi Junlei2,Tu Jinchun1ORCID

Affiliation:

1. State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and Engineering Hainan University Haikou 570228 P. R. China

2. State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin 150001 P. R. China

Abstract

AbstractIn the past several decades, Photoelectrochemical (PEC) sensing still remains a great challenge to design highly‐efficient semiconductor photocatalysts via a facile method. It is of much importance to design and synthesize various novel nanostructured sensing materials for further improving the response performance. Herein, we present an In2O3/In2S3 heterostructure obtained by combining microwave assisted hydrothermal method with S‐induced phase change, whose energy band and electronic structure could be adjusted by changing the S content. Combining theoretical calculation and spectroscopic techniques, the introduction of sulfur was proved to produce multifunctional interfaces, inducing the change of phase, oxygen vacancies and band gap, which accelerates the separation of photoexcited carriers and reduces their recombination, improving the electronic injection efficiency around the interface of In2O3/In2S3. As anticipated, an enhanced glucose response performance with a photocurrent of 0.6 mA cm−2, a linear range of 0.1–1 mM and a detection limit as low as 14.5 μM has been achieved based on the In2O3/In2S3 heterostructure, which is significant superior over its pure In2O3 and S‐doped In2O3 counterparts. This efficient interfacial strategy may open a new route to manipulate the electrical structure, and energy band structure regulation of sensing material to improve the performance of photoelectrodes for PEC.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Hainan Province

State Key Laboratory of Marine Resource Utilization in South China Sea

Publisher

Wiley

Subject

General Chemistry,Catalysis,Organic Chemistry

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