Vanadium pentoxide (VO) nanorods have been deposited onto the glass substrates by spraying 75ml of 30mM vanadium trichloride (VCl) solution at optimized substrate temperature of 400°C. The XRD study confirms the formation of orthorhombic crystal structure of VO nanorods. The FE-SEM micrograph shows the nanorods-like morphology of VO. The presence of palladium (Pd) in the Pd-sensitized VO nanorods is confirmed using EDAX study. The gas sensing measurements show that the Pd-sensitized VO sensing material is an outstanding candidate for nitrogen dioxide (NO) gas detection. Obtained results demonstrate that the Pd-sensitized VO nanorods show the superior selectivity for NO gas in comparison with other gases such as NH, HS, CO, CO and SO at an operating temperature of 200°C. It shows the 75% response for 100ppm NO gas concentration with response and recovery times of 22s and 126s, respectively. Finally, the gas sensing mechanism based on chemisorption process is proposed to illustrate how Pd nanoparticles affect the gas sensing characteristics (response and response-recovery times).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jcis.2017.01.120 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
All-Fiber Multicomponent Gas Raman Probe Based on Platinum-Coated Capillary Enhanced Raman Spectroscopy.
ACS Sens
January 2025
National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, China.
This paper presents a compact all-fiber multicomponent gas Raman probe using a dual-fiber architecture within a platinum-coated capillary. The probe eliminates the need for conventional optical components like filters and dichroic mirrors by strategically employing metal coating on the excitation fiber's surface to suppress interference signals. A detailed analysis of the silica Raman signal and fluorescence propagation within the system facilitated this design.
View Article and Find Full Text PDFHighly sensitive, responsive, and selective iodine gas sensor fabricated using AgI-functionalized graphene.
Nat Commun
January 2025
School of Emergent Soft Matter, South China University of Technology, Guangzhou, China.
Radioactive molecular iodine (I) is a critical volatile pollutant generated in nuclear energy applications, necessitating sensors that rapidly and selectively detect low concentrations of I vapor to protect human health and the environment. In this study, we design and prepare a three-component sensing material comprising reduced graphene oxide (rGO) as the substrate, silver iodide (AgI) particles as active sites, and polystyrene sulfonate as an additive. The AgI particles enable reversible adsorption and conversion of I molecules into polyiodides, inducing substantial charge density variation in rGO.
View Article and Find Full Text PDFA Novel Rhodamine Functionalized Schiff Base Type Ratiometric Fluorescent Chemosensor for the Sensing of Hg Ions; Experimental and Theoretical Approach.
J Fluoresc
January 2025
Department of Chemistry, Madanapalle Institute of Technology & Science, Kadiri Road, Angallu, Madanapalle, 517325, Annamayya District, Andhra Pradesh, India.
A new Rhodamine functionalised Schiff Base sensor 3',6'-bis(diethylamino)-2-((4-hydroxybenzylidene)amino)spiro[isoindoline-1,9'-xanthen]-3-one (SBRB1) was designed and synthesized. The recognition ability of sensor SBRB1 towards Hg was studied by using UV-Vis and fluorescence spectroscopy. The fluorescence results showed that the sensor SBRB1 has specific selectivity as well as sensitivity towards Hg among other competitive metal ions as the fluorescence intensity at 479 nm quenched only in the presence of Hg.
View Article and Find Full Text PDFAssessing sub-Saharan Africa's GHG emissions from croplands: environmental impacts and sustainable mitigation strategies.
Environ Monit Assess
January 2025
Department of Environmental Management, Institute of Environmental Engineering, RUDN University, Miklukho-Maklaya Street, 117198, Moscow, Russia.
Globally, agricultural lands are among the top emitters of greenhouse gases (GHGs), responsible for over 20% of total greenhouse gas (GHG) emissions. Climatic conditions, an acute challenge in sub-Saharan Africa (SSA), where access to mitigation technologies remains limited, have heavily influenced these lands. This study explores GHG contributions from crop production and their devastating and deteriorating impacts on the economy and environment and proposes a sustainable solution.
View Article and Find Full Text PDFUltrasensitive Flexible NO Sensors with Remote-Controllable ADC-Electropolymerized Conducting Polymers on Plastic.
ACS Nano
January 2025
SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nano Science and Technology, Sungkyunkwan University, Suwon 16419, Republic of Korea.
Alternating- and direct-current (ADC) bipolar electropolymerization (EP) offers an efficient and scalable approach for the lateral synthesis of conjugated macromolecules, enabling the simultaneous polymerization and deposition of large conducting polymer films with intriguing fractal-like ramified topographies onto arbitrary insulating substrates under remote control. In this study, we presented the remote synthesis of poly(3,4-ethylenedioxythiophene) (PEDOT):anion sensing films on a plastic substrate, aimed at their use in flexible nitrogen dioxide (NO) gas sensors. Notably, the PEDOT:ClO films exhibited excellent gas-sensing characteristics, with a sensitivity of 54.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!