In Operando Impedance Spectroscopic Analysis on NiO-WO Nanorod Heterojunction Random Networks for Room-Temperature HS Detection.

Clicks: 245
ID: 32940
2018
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Steady

Ranked #272 of 475 articles by views in ACS omega

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 475 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
The use of metal-oxide sensors for effectively detecting hydrogen sulfide (HS) gas at room temperature is currently hindered by their inadequate sensitivity and selectivity. Using a lucid fabrication strategy, we report a room-temperature, highly sensitive, and selective HS gas sensor using NiO-modified WO nanorod (one-dimensional-one-dimensional) random networks. The observed improvements in gas-sensing sensitivity stem from the synergistic effects of various contributions inside the sensing heterostructure, such as bulk nanorod, p-n heterojunction at the interface of these two dissimilar oxides, and gas-induced conducting species due to sulfurization (WS and NiS ). An in situ impedance measurement during gas exposure was used to investigate the influence of these effects. The analysis revealed that these contributing factors can be either cooperating or competing and lead to either increased or decreased sensitivity, respectively. The presence of semimetallic species (NiS, WS) was further confirmed by in situ X-ray diffraction analysis of the heterostructure nanorod sample with HS gas exposure. The related sensing mechanism in the heterostructures is presented with a conduction pathway model. The room-temperature-operated nanorod heterostructure sensors showed a lower detection limit of HS at ∼0.5 ppm, which is significantly lower than its toxicity limiting value ∼10 ppm, per the Environmental Protection Agency. The nanorod heterostructure sensors can be used for real-time, low-cost, room-temperature alarms in an HS monitoring system.
Reference Key
wang2018inacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Wang, Yale;Maity, Arnab;Sui, Xiaoyu;Pu, Haihui;Mao, Shun;Singh, Niraj K;Chen, Junhong;
Journal ACS omega
Year 2018
DOI
10.1021/acsomega.8b01981
URL
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.