Optimizing surface states to elevate xylene gas sensing characteristics in ZnCo2O4 microspheres

IF 8 1区化学 Q1 CHEMISTRY, ANALYTICAL Sensors and Actuators B: Chemical Pub Date : 2025-02-01 DOI:10.1016/j.snb.2025.137369

Chenlu Hu , Rui Jiang , Yanxu Feng , Jie Huo , Bosen Zhang , Shuangming Wang , Jing Cao

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Abstract

The engineering surface strategy has been proven to be feasible and effective in elevating gas sensing performance of semiconductor sensing materials. However, how to properly engineer the surface of sensing materials still poses great challenges. Herein, different concentrations of sodium borohydride (NaBH₄) solutions are employed to solve this issue. The ZnCo₂O₄ microspheres treated by a 0.005 mol/L NaBH₄ solution (ZCO-0.005) show significantly enhanced xylene gas selectivity and sensing response compared to untreated ZnCo₂O₄ microspheres. To explain this phenomenon, various experimental characterization techniques are carried out. The NaBH₄ solution etches ZnCo₂O₄ surfaces building blocks, exposes more metal oxygen bonds and hydroxyl groups and increases specific surface area, which provides and acts as gas adsorption and reaction sites for xylene, and promotes xylene recognition and signal conversion.

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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.