Closed loop acquisition of multi-levels humidity sensors by spontaneous optimization TiO2/Ti3C2Tx heterojunction without artificial intervention

IF 8 1区化学 Q1 CHEMISTRY, ANALYTICAL Sensors and Actuators B: Chemical Pub Date : 2025-02-12 DOI:10.1016/j.snb.2025.137426

Zhuoyu Yang, Weiqing Liu, Ligang Yuan, Wenhao Chen, Gaigai Ma, Jiayi Xu, Qiang Wu

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Abstract

Finding a simple way to improve the performance of Ti₃C₂T_x humidity sensors is a huge challenge. Unlike the complex preparation process in the past, we reported on different levels of humidity sensors that can be obtained during the oxidation process of Few-layer Ti₃C₂T_x without artificial intervention. The Ti₃C₂T_x content m in the oxidation products of anatase TiO₂/mTi₃C₂T_x could be readily optimized by monitoring the storage time. A small portion of the surface of Ti₃C₂T_x was transformed into rutile TiO₂ by ultraviolet ozone (UV) irradiation, and a rutile-anatase TiO₂/mTi₃C₂T_x triple junction material is obtained. The corresponding sensor exhibits different levels of sensing performance. In addition, a new sensing mechanism that gradually degrades from inductance characteristics to capacitive characteristics has been revealed. The closed-loop recycling mode without material loss designed in this work also is expected to solve the reuse problem of Mxene waste after oxidation.

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通过自发优化 TiO2/Ti3C2Tx 异质结实现多级湿度传感器的闭环采集，无需人工干预

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来源期刊

Sensors and Actuators B: Chemical 工程技术-电化学

CiteScore

14.60

自引率

11.90%

发文量

1776

审稿时长

3.2 months

期刊介绍： Sensors & Actuators, B: Chemical is an international journal focused on the research and development of chemical transducers. It covers chemical sensors and biosensors, chemical actuators, and analytical microsystems. The journal is interdisciplinary, aiming to publish original works showcasing substantial advancements beyond the current state of the art in these fields, with practical applicability to solving meaningful analytical problems. Review articles are accepted by invitation from an Editor of the journal.