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

IF 3.7 1区化学 Q1 CHEMISTRY, ANALYTICAL Sensors and Actuators B: Chemical Pub Date : 2025-05-01 Epub 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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优化表面态以提高ZnCo2O4微球的二甲苯气敏特性

工程表面策略对于提高半导体传感材料的气敏性能是可行和有效的。然而，如何正确地设计传感材料的表面仍然是一个巨大的挑战。本文采用不同浓度的硼氢化钠（NaBH4）溶液来解决这个问题。经0.005 mol/L NaBH4溶液（ZCO-0.005）处理的ZnCo2O4微球与未处理的ZnCo2O4微球相比，对二甲苯气体的选择性和传感响应显著增强。为了解释这一现象，进行了各种实验表征技术。NaBH4溶液蚀刻ZnCo2O4表面，暴露更多的金属氧键和羟基，增加比表面积，为二甲苯提供并充当气体吸附和反应位点，促进二甲苯识别和信号转换。

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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.