Optical fiber sensor coated with copper and iron oxide nanoparticles for hydrogen sulfide sensing

López, Juan Camilo; Keley, Meysam; Dante, Alex; Werneck, Marcelo Martins

doi:10.1016/j.yofte.2021.102731

Cited by 13 publications

(4 citation statements)

References 43 publications

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“…This supported the display in exhibiting the photo-capacitance behavior [32]. Cu, Fe and Mn doped TiO 2 photocatalysts had a dyedegradation rate of more than 90 % [33]. CuO sensors demonstrated a non-reversible chemisorption behavior, which was found to have 7 times the sensitivity of the less sensitive sensor.…”

Section: Cu Nanofiller For Polymeric Matrix and Other Nanocompositessupporting

confidence: 62%

A Review on Electrospun PVDF-Doped Metal Oxide Nanoparticles for Sensor Applications

Malini¹,

Indumathy²,

Gunasekhar³

et al. 2022

ECS Trans.

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Among the many fluoropolymers, polyvinylidiene fluoride (PVDF) has been well-known since 1960s and is preferred for various electronic applications owing to its lower cost, inordinate mechanical properties, and tunable polymorphism. It is well known that PVDF exhibits five different crystalline polymorphs (α). Among all, β-crystalline phase is the most important with excellent piezoelectric, ferroelectric, and pyroelectric properties.Metal oxide nanoparticles (MO-NPs) are used in diverse applications, aided by their unique electrical, optical, magnetic, and catalytic properties. Many reports are available with a focus on the synthesis of Fe, Co, and Ni oxide magnetic NPs for data storage and sensor applications. More importantly, transition metal cations can exist in several different valence states and their crystallite size increased with increasing addition of metal doping. Incorporation of MO and doped MO with PVDF plays pivotal a role in improving the sensitivity of the piezoelectric sensor. This review covers the doping of PVDF with MO-NPs and their effectiveness towards in applications.

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Section: Cu Nanofiller For Polymeric Matrix and Other Nanocompositessupporting

confidence: 62%

A Review on Electrospun PVDF-Doped Metal Oxide Nanoparticles for Sensor Applications

Malini¹,

Indumathy²,

Gunasekhar³

et al. 2022

ECS Trans.

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show abstract

“…[ 1 , 2 , 3 , 4 , 5 ]. Such sensors have been widely applied in physical, chemical, and biological applications due to their unique properties (e.g., micro-size, lightweight, flexible, durable, biocompatibility, corrosion resistance, cost-effective, immune to electromagnetic interference) [ 6 , 7 , 8 , 9 ]. To date, several fiber-optic sensors with different structures have been developed, including photonic crystal fibers [ 10 , 11 ], FBGs [ 12 , 13 ], long-period fiber gratings [ 14 , 15 ], optical microfibers [ 16 ], and tapered optical fibers [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

A Taper-in-Taper Structured Interferometric Optical Fiber Sensor for Cu2+ ion Detection

Gong

Lei

Wang

et al. 2022

Sensors

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Copper ion is closely associated with the ecosystem and human health, and even a little excessive dose in drinking water may result in a range of health problems. However, it remains challenging to produce a highly sensitive, reliable, cost-effective and electromagnetic-interference interference-immune device to detect Cu2+ ion in drinking water. In this paper, a taper-in-taper fiber sensor was fabricated with high sensitivity by mode-mode interference and deposited polyelectrolyte layers for Cu2+ detection. We propose a new structure which forms a secondary taper in the middle of the single-mode fiber through two-arc discharge. Experimental results show that the newly developed fiber sensor possesses a sensitivity of 2741 nm/RIU in refractive index (RI), exhibits 3.7 times sensitivity enhancement when compared with traditional tapered fiber sensors. To apply this sensor in copper ions detection, the results present that when the concentration of Cu2+ is 0–0.1 mM, the sensitivity could reach 78.03 nm/mM. The taper-in-taper fiber sensor exhibits high sensitivity with good stability and mechanical strength which has great potential to be applied in the detection of low Cu2+ ions in some specific environments such as drinking water.

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“…In addition, H 2 S is flammable and typically dangerous [1][2][3][4][5][6][7][8]. H 2 S gas is released during the breakdown of food, and it is also responsible for bad breath caused by periodontitis [8][9][10][11]. There are about 0.195 ppm H 2 S in the exhaled breath of a person with periodontitis and 0.105 ppm in that of a healthy person [12].…”

Section: Introductionmentioning

confidence: 99%

Pd-Modified LaFeO3 as a High-Efficiency Gas-Sensing Material for H2S Gas Detection

et al. 2022

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As a typical p-type semiconductor gas-sensing material, LaFeO3 has good response stability to H2S, but its responsiveness is low, and the detection limit is not low enough for large-scale use in the field of gas sensors. To obtain better performance, we synthesized Pd modified LaFeO3 using the sol–gel method. A total of 3 wt% of Pd–LaFeO3 with a high specific surface area had the highest response to H2S (36.29–1 ppm) at 120 °C, with relatively fast response–recovery times (19.62/15.22 s), and it had higher selectivity to H2S with other gases. Finally, we detected the H2S concentrations in the air around the shrimps, and the H2S concentrations that we obtained by the 3 wt% Pd–LaFeO3 in this study were within 10% of those obtained by GC–MS. According to the experimental results, noble-metal surface modification improves the performance of gas-sensing materials, and Pd–LaFeO3 has considerable potential in H2S detection.

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Optical fiber sensor coated with copper and iron oxide nanoparticles for hydrogen sulfide sensing

Cited by 13 publications

References 43 publications

A Review on Electrospun PVDF-Doped Metal Oxide Nanoparticles for Sensor Applications

A Review on Electrospun PVDF-Doped Metal Oxide Nanoparticles for Sensor Applications

A Taper-in-Taper Structured Interferometric Optical Fiber Sensor for Cu2+ ion Detection

Pd-Modified LaFeO3 as a High-Efficiency Gas-Sensing Material for H2S Gas Detection

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