CuO nanoparticles-decorated femtosecond laser-irradiated WS2–WO3 heterojunctions to realize selective H2S gas sensor

IF 3.7 1区化学 Q1 CHEMISTRY, ANALYTICAL Sensors and Actuators B: Chemical Pub Date : 2024-12-25 DOI:10.1016/j.snb.2024.137167

Hyoungwon Park , Jonghyeok Kim , Sanghoon Ahn , Ali Mirzaei , Jae-Hun Kim , Changkyoo Park

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Abstract

Femtosecond (FS) laser irradiation is an easy and highly effective strategy for enhancing the sensing properties of resistive gas sensors. In this study, we applied this technique to WS₂ nanosheets (NSs) to generate WS₂–WO₃ heterojunctions. Subsequently, they were decorated with CuO nanoparticles (NPs). Different characterization techniques demonstrated the formation of CuO-decorated WS₂–WO₃ heterojunction NSs with the desired morphology, phase, and chemical composition. Based on H₂S gas-sensing studies, while non-irradiated WS₂ sensors exhibited poor sensing performance, a combination of FS laser irradiation and CuO decoration led to significant performance improvement for H₂S sensing in terms of response and selectivity. Enhanced performance is related to the formation of plenty of WS₂–WO₃ heterojunctions, oxygen vacancies, and the conversion of CuO to CuS with high metallic conductivity. We believe that the strategy used in this work can pave the way for the realization of low-temperature, sensitive, and selective H₂S gas sensors.

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利用纳米CuO修饰飞秒激光辐照WS2-WO3异质结，实现选择性H2S气体传感器

飞秒激光辐照是提高电阻式气体传感器传感性能的一种简单而高效的方法。在这项研究中，我们将该技术应用于WS2纳米片（NSs）上，以生成WS2 - wo3异质结。随后，用氧化铜纳米粒子（NPs）修饰它们。不同的表征技术证明了cuo修饰的WS2-WO3异质结NSs具有理想的形态、相和化学成分。基于H2S气敏研究，未辐照的WS2传感器传感性能较差，而FS激光辐照和CuO修饰的组合在响应和选择性方面显著提高了H2S传感性能。性能的增强与大量WS2-WO3异质结的形成、氧空位的形成以及CuO向cu的转化有关，具有较高的金属导电性。我们相信，在这项工作中使用的策略可以为实现低温、敏感和选择性H2S气体传感器铺平道路。

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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.