The updated gas sensing performance of In2O3 porous nanospheres for ppb level formaldehyde by doping with Mo

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-03-10 DOI:10.1016/j.vacuum.2025.114248

Xiaohua Wang , Yanwei Li , Xinhui Jin , Guang Sun , Jianliang Cao , Yan Wang

{"title":"The updated gas sensing performance of In2O3 porous nanospheres for ppb level formaldehyde by doping with Mo","authors":"Xiaohua Wang , Yanwei Li , Xinhui Jin , Guang Sun , Jianliang Cao , Yan Wang","doi":"10.1016/j.vacuum.2025.114248","DOIUrl":null,"url":null,"abstract":"<div><div>Rapidly and highly sensitive detection of formaldehyde (HCHO) at ppb level by using metal oxide semiconductor (MOS) based gas sensor has attracted growing attention due to the urgent need for environmental and health protection. Herein, molybdenum (Mo) doping strategy was proposed to improve the formaldehyde (HCHO) sensitivity of In2O3 porous nanospheres (PNSs), which enables them to monitor ppb level HCHO at a relatively lower temperature. The Mo-doped In2O3 (Mo–In2O3) PNSs were prepared through a freeze-drying and calcination route by using hydrothermally synthesized In(OH)3 as a precursor. As applied as an active material for detecting HCHO, Mo–In2O3 PNSs showed some impressive improvements as compared with bare In2O3 counterparts, such as lower operating temperature (300 °C vs 120 °C), higher response (17 vs 1.92 for 1.03 ppm HCHO), the shorter response time (324 s vs 423 s), and better selectivity. Even to 10.3 ppb HCHO, the Mo–In2O3 sensor can give a response of 2.44, revealing its limit of detection (LOD) for HCHO can be as low as 10.3 ppb. The multiple sensitization effects in Mo–In2O3 PNSs as well as their behind mechanism were discussed.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":"238 ","pages":"Article 114248"},"PeriodicalIF":3.8000,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vacuum","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0042207X25002386","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Rapidly and highly sensitive detection of formaldehyde (HCHO) at ppb level by using metal oxide semiconductor (MOS) based gas sensor has attracted growing attention due to the urgent need for environmental and health protection. Herein, molybdenum (Mo) doping strategy was proposed to improve the formaldehyde (HCHO) sensitivity of In₂O₃ porous nanospheres (PNSs), which enables them to monitor ppb level HCHO at a relatively lower temperature. The Mo-doped In₂O₃ (Mo–In₂O₃) PNSs were prepared through a freeze-drying and calcination route by using hydrothermally synthesized In(OH)₃ as a precursor. As applied as an active material for detecting HCHO, Mo–In₂O₃ PNSs showed some impressive improvements as compared with bare In₂O₃ counterparts, such as lower operating temperature (300 °C vs 120 °C), higher response (17 vs 1.92 for 1.03 ppm HCHO), the shorter response time (324 s vs 423 s), and better selectivity. Even to 10.3 ppb HCHO, the Mo–In₂O₃ sensor can give a response of 2.44, revealing its limit of detection (LOD) for HCHO can be as low as 10.3 ppb. The multiple sensitization effects in Mo–In₂O₃ PNSs as well as their behind mechanism were discussed.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.