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Ti₃C₂ MXene-based Schottky Photocathode for Enhanced Photoelectrochemical Sensing

Ye, Cui and Wu, Zhen and Ma, Keyi and Xia, Zhuohao and Pan, Jun and Wang, Minqiang and Ye, Changhui (2021) Ti₃C₂ MXene-based Schottky Photocathode for Enhanced Photoelectrochemical Sensing. Journal of Alloys and Compounds, 859 . Art. No. 157787. ISSN 0925-8388. https://resolver.caltech.edu/CaltechAUTHORS:20201105-152206659

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Abstract

Nanomaterials are vital to the realization of photoelectrochemical (PEC) sensing platform that provides the sensitive detection and quantification of low-abundance biological samples. Here, this work reports a Schottky junction-based BiOI/Ti₃C₂ heterostructure, used as a photocathode for PEC bioanalysis. Specially, we realize in situ growth of flower-like BiOI on 2D intrinsically negatively charged Ti₃C₂ MXene nanosheet that endows BiOI/Ti₃C₂ heterostructure with admirably combined merits, noting in particular the generation of built-in electric field and the decrease of contact resistance between BiOI and Ti₃C₂. Under the visible light irradiation, the BiOI/Ti₃C₂ heterostructure-modified PEC platform displays superior cathodic photocurrent signal, while PEC response cuts down with the presence of L-Cysteine (L-Cys) as a representative analyte owing to the metal-S bond formation. The “signal-off” PEC sensing strategy shows good performance in terms of sensitivity, limit of detection (LOD, 0.005 nM) and stability. This research reveals the great potentials of MXene-based heterostructure in the application field of PEC sensor establishment.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.jallcom.2020.157787DOIArticle
ORCID:
AuthorORCID
Ye, Cui0000-0001-7689-6825
Wang, Minqiang0000-0002-7775-8341
Ye, Changhui0000-0002-4986-530X
Alternate Title:Ti3C2 MXene-based Schottky Photocathode for Enhanced Photoelectrochemical Sensing
Additional Information:© 2020 Elsevier. Received 17 June 2020, Revised 27 October 2020, Accepted 29 October 2020, Available online 5 November 2020. This work was supported by the National Natural Science Foundation of China (Grant No. 21904116). The authors are grateful to Prof. Changhui Ye (Deceased on Nov 1 2019) for assistance. CRediT authorship contribution statement: Cui Ye: Writing - review & editing, Funding acquisition, Supervision. Zhen Wu: Writing - original draft, Data curation. Keyi Ma: Writing - original draft, Data curation. Zhuohao Xia: Writing - original draft, Data curation. Jun Pan: Formal analysis. Minqiang Wang: Writing - review & editing, Formal analysis. Changhui Ye: Funding acquisition. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China21904116
Subject Keywords:Ti₃C₂ MXene; Photoelectrochemical Sensing; Schottky Junction; L-Cysteine
Record Number:CaltechAUTHORS:20201105-152206659
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20201105-152206659
Official Citation:Cui Ye, Zhen Wu, Keyi Ma, Zhuohao Xia, Jun Pan, Minqiang Wang, Changhui Ye, Ti3C2 MXene-based Schottky photocathode for enhanced photoelectrochemical sensing, Journal of Alloys and Compounds, Volume 859, 2021, 157787, ISSN 0925-8388, https://doi.org/10.1016/j.jallcom.2020.157787. (http://www.sciencedirect.com/science/article/pii/S0925838820341517)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106462
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:06 Nov 2020 15:47
Last Modified:29 Jan 2021 18:58

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