Rationally constructed ZnCdS-HDCs@In2S3-HNRs double-hollow heterojunction with promoted light capture capability for photoelectrochemical biosensing

IF 11.8 1区生物学 Q1 BIOPHYSICS

Biosensors and Bioelectronics Pub Date : 2022-04-01 Epub Date: 2022-01-03 DOI:10.1016/j.bios.2021.113957

Mingxuan Peng , Shaoyu Lin , Zhenbin Lin , Delun Zheng , Yibing Song , Fushen Lu , Yaowen Chen , Wenhua Gao

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引用次数: 12

Abstract

The construction of novel heterojunction is regarded as an operative scheme to promote the transport of photogenerated carriers and reduce electron-hole pair recombination to enhance the photoelectrochemical (PEC) performances. Herein, ZnCdS hollow dodecahedral nanocages (ZnCdS-HDCs) and In₂S₃ hollow nanorods (In₂S₃-HNRs), which were derived from two different of metal-organic frameworks (MOFs) by solvothermal sulfidation method and were constructed an original double-hollow heterostructure ZnCdS-HDCs@In₂S₃-HNRs. The intrinsic mechanism of In₂S₃-HNRs benefiting from unique morphology to boost the photochemical properties under visible light irradiation was illustrated. Meanwhile, the mechanism of the novel type II heterojunction with staggered matching levels was revealed, which could effectively restrict electron-hole pair reassociation separation, and accelerated charge separation and transfer. Therefore, based on the excellent PEC performance of ZnCdS- HDCs@In₂S₃-HNRs double-hollow heterostructure, a signal-off PEC biosensor platform without labeled was constructed for the detection of CA15-3, which manifested acceptable specificity, reproducibility and stability. Additionally, the expected PEC biosensors showed a linear response range from 1.0 × 10⁻⁵ to 10 U·mL⁻¹ in addition to an ultralow detection limit of 3.78 × 10⁻⁶ U·mL⁻¹. This study innovatively constructed and prepared a new double-hollow heterojunction material with superior PEC nature for the application of PEC biosensing, which exhibits a broad application prospect.

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合理构建ZnCdS-HDCs@In2S3-HNRs双空心异质结，提高光捕获能力，用于光电化学生物传感

新型异质结的构建被认为是促进光生载流子输运和减少电子-空穴对复合以提高光电化学性能的有效方案。本文采用溶剂热硫化法从两种不同的金属有机骨架(mof)中分离得到ZnCdS空心十二面体纳米笼(ZnCdS- hdcs)和In2S3空心纳米棒(In2S3- hnrs)，构建了原始的双空心异质结构ZnCdS-HDCs@In2S3-HNRs。阐明了In2S3-HNRs在可见光照射下利用其独特的形态提高光化学性能的内在机理。同时，揭示了具有交错匹配能级的新型II型异质结的形成机理，该异质结能有效地限制电子-空穴对重缔合分离，加速电荷的分离和转移。因此，基于ZnCdS- HDCs@In2S3-HNRs双空心异质结构优异的PEC性能，构建了一个无标记的信号关闭型PEC生物传感器平台，用于检测CA15-3，该平台具有可接受的特异性、重复性和稳定性。此外，PEC生物传感器的线性响应范围为1.0 × 10−5 ~ 10 U·mL−1，超低检出限为3.78 × 10−6 U·mL−1。本研究创新性地构建并制备了一种具有优异PEC性质的新型双空心异质结材料，用于PEC生物传感，具有广阔的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biosensors and Bioelectronics 工程技术-电化学

CiteScore

20.80

自引率

7.10%

发文量

1006

审稿时长

29 days

期刊介绍： Biosensors & Bioelectronics, along with its open access companion journal Biosensors & Bioelectronics: X, is the leading international publication in the field of biosensors and bioelectronics. It covers research, design, development, and application of biosensors, which are analytical devices incorporating biological materials with physicochemical transducers. These devices, including sensors, DNA chips, electronic noses, and lab-on-a-chip, produce digital signals proportional to specific analytes. Examples include immunosensors and enzyme-based biosensors, applied in various fields such as medicine, environmental monitoring, and food industry. The journal also focuses on molecular and supramolecular structures for enhancing device performance.