Effects of NiO, SnO2, and Ni-doped SnO2 semiconductor metal oxides on the oxygen sensing capacity of H2TPP

Ongun, Merve Zeyrek; Oğuzlar, Sibel; Erol, Mustafa Kemal

doi:10.1016/j.aca.2022.340387

Cited by 4 publications

(5 citation statements)

References 65 publications

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“…Regarding the increase in fluorescence quenching of HPTS in the presence of a CO 2 atmosphere, the transfer of electrons from the excited singlet state to the CB of metal oxide semiconductors may contribute to this phenomenon. The presence of CO 2 can lead to energy dissipation pathways, such as electron transfer to gas molecules or other reactive species, resulting in the quenching of fluorescence Figure shows the schematic diagram of energy transfer between HPTS and MOSs.…”

Section: Resultsmentioning

confidence: 99%

“…The presence of CO 2 can lead to energy dissipation pathways, such as electron transfer to gas molecules or other reactive species, resulting in the quenching of fluorescence. 48 Figure 10 shows the schematic diagram of energy transfer between HPTS and MOSs. The enhanced CO 2 sensitivity of the Sn@ZnO NPs may be attributed to the broad overlap of the emission band of the Sn@ZnO NPs with both the absorption and emission bands of HPTS.…”

Section: Resultsmentioning

confidence: 99%

“…The presence of CO 2 can lead to energy dissipation pathways, such as electron transfer to gas molecules or other reactive species, resulting in the quenching of fluorescence. 48 improves the surface adsorption and desorption of CO 2 gas to the sensor surface. 49,50 Both HPTS and metal oxide particles competed with each other for absorbance when immobilized in the proximity of the polymeric matrix and simultaneously excited by the light source.…”

Section: Interactions Between Hpts and Mossmentioning

confidence: 99%

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Improvement of the CO₂ Sensitivity: HPTS-Based Sensors along with Zn@SnO₂ and Sn@ZnO Additives

Zeyrek Ongun,

Oguzlar

2023

ACS Omega

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Fluorescent pH-sensitive indicator dye, 8-hydroxypyrene-1,3,6-trisulfonic acid (HPTS), has become known as a preferred alternative for continuous and accurate monitoring of dissolved and/or gaseous CO 2 in chemistry, medical, and biochemical research. The objective of this work is to enhance the HPTS dye's CO 2 sensitivity in the presence of Zn@SnO 2 and Sn@ZnO additive particles. Sol−gel synthesized metal oxide semiconductors (MOSs) were characterized using XRD, XPS, and SEM. The fluorophore dye and the MOS additives were embedded in the ethyl cellulose (EC) polymeric matrix to prepare the sensing thin films. The steady-state and decay kinetic measurements of the HPTS-based composites were obtained by PL spectroscopy for the concentration ranges of 0−100% p[CO 2 ]. As expected, the addition of MOSs improves the sensor characteristics, specifically its CO 2 sensing ability, linear response range, and relative signal change compared to the free form of HPTS. The CO 2 sensitivities of the HPTS-based thin films were found at 17.6, 23.2, and 40.9 for the undoped, Zn@SnO 2, -doped, and Sn@ZnO-doped forms of the HPTS, respectively. Additionally, the response and recovery times of the HPTS-based sensor agent with Sn@ZnO were measured as 10 and 460 s, respectively. The obtained results demonstrate that materials composed of HPTS with MOSs are potential candidates for CO 2 sensors.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The presence of CO 2 can lead to energy dissipation pathways, such as electron transfer to gas molecules or other reactive species, resulting in the quenching of fluorescence. 48 improves the surface adsorption and desorption of CO 2 gas to the sensor surface. 49,50 Both HPTS and metal oxide particles competed with each other for absorbance when immobilized in the proximity of the polymeric matrix and simultaneously excited by the light source.…”

Section: Interactions Between Hpts and Mossmentioning

confidence: 99%

See 1 more Smart Citation

Improvement of the CO₂ Sensitivity: HPTS-Based Sensors along with Zn@SnO₂ and Sn@ZnO Additives

Zeyrek Ongun,

Oguzlar

2023

ACS Omega

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“…Given this backdrop, to the authors’ best knowledge, very few research papers are focused on the combination of MOS with porphyrin macrocycles for sensing application, and most of them are focused on the use of zinc oxide as MOS. − Furthermore, to date, the only exploration of hybrid materials comprising porphyrins and SnO 2 demonstrates that this combination enhances the performance of optical oxygen sensors and presents encouraging prospects for developing chemiresistive sensor materials capable of detecting mixed BTEX compounds …”

Section: Introductionmentioning

confidence: 99%

“…32 Given this backdrop, to the authors' best knowledge, very few research papers are focused on the combination of MOS with porphyrin macrocycles for sensing application, and most of them are focused on the use of zinc oxide as MOS. 31−37 Furthermore, to date, the only exploration of hybrid materials comprising porphyrins and SnO 2 demonstrates that this combination enhances the performance of optical oxygen sensors 38 and presents encouraging prospects for developing chemiresistive sensor materials capable of detecting mixed BTEX compounds. 39 Generally, in a gas sensor employing chemiresistive technology with MOS functionalized by porphyrins, detecting electron donor species results in an augmented current and, consequently, in a reduction in resistivity, irrespective of the specific sensing mechanism.…”

Section: Introductionmentioning

confidence: 99%

How the Interplay between SnO₂ and Zn(II) Porphyrins Impacts on the Electronic Features of Gaseous Acetone Chemiresistors

Tessore,

Pargoletti,

Di Carlo

et al. 2024

ACS Appl. Mater. Interfaces

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Herein, the integration of SnO 2 nanoparticles with two Zn(II) porphyrins�Zn(II) 5,10,15, and its perfluorinated counterpart, Zn(II) 5,10,15,20-tetrakis-(pentafluorophenyl)porphyrin (ZnTPPF 20 )�was investigated for the sensing of gaseous acetone at 120 °C, adopting three Zn-porphyrin/ SnO 2 weight ratios (1:4, 1:32, and 1:64). For the first time, we were able to provide evidence of the correlation between the materials' conductivity and these nanocomposites' sensing performances, obtaining optimal results with a 1:32 ratio for ZnTPPF 20 /SnO 2 and showcasing a remarkable detection limit of 200 ppb together with a boosted sensing signal with respect to bare SnO 2 . To delve deeper, the combination of experimental data with density functional theory calculations unveiled an electron-donating behavior of both porphyrins when interacting with tin dioxide semiconductor, especially for the nonfluorinated one. The study suggested that the interplay between electrons injected, from the porphyrins' highest occupied molecular orbital to SnO 2 conduction band, and the latter's available electronic states has a dramatic impact to boost the chemiresistive sensing. Indeed, we highlighted that the key lies in preventing the full saturation of SnO 2 electronic states concomitantly increasing the materials' conductivity: in this respect, the best compromise turned out to be the perfluorinated porphyrin. A further corroboration of our findings was obtained by illuminating the sensors during measurements with light-emitting diode (LED) light. Actually, we demonstrated that it does not have any impact on improving the sensing behavior, most probably due to the electronic oversaturation and scattering caused by LED excitation in porphyrins. Lastly, the most effective hybrids (1:32 ratio) were physicochemically characterized, confirming the physisorption of the macrocycles onto the SnO 2 surface. In conclusion, herein, we underscore the feasibility of customizing the porphyrin chemistry and porphyrin-to-SnO 2 ratio to enhance the gaseous sensing of bare metal oxides, providing valuable insights for the engineering of highly performing light-free chemiresistors.

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Enhancing the O2 sensitivity of [Ru(bpy)3]2+ dye by incorporating SnO2 and Ni:SnO2

Oguzlar,

Zeyrek Ongun

2024

J Mater Sci: Mater Electron

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Oxygen (O2)-sensitive probes encapsulated in a polymeric matrix have gas sensitivity improved by adding different metal oxide semiconductors (MOSs) to the composition. In this research, O2-sensitive tris(2,2′-bipyridyl) ruthenium(II) chloride ([Ru(bpy)3]Cl2) was chosen as a fluorophore, and SnO2 and Ni:SnO2 additives were used to enhance the oxygen sensitivity of the dye. While preparing sensing agents as a form of thin film and nanofiber, dye and MOSs powders were immobilized into the polymethylmethacrylate (PMMA) matrix in close proximity to each other. The oxygen-induced intensity measurements, decay time kinetics, and kinetic response were investigated for each of the sensing slides in the concentration range of 0–100% [O2]. Signal decreases in the emission-based intensity values of all MOSs-doped [Ru(bpy)3]2+-based complexes were monitored. Compared with free form, Ni:SnO2-doped [Ru(bpy)3]2+-based nanofiber agents exhibited a 4.03-fold increase in signal change (I0/I) ratio. The nanofiber structure, which allows the sensor slide to have a higher surface/volume ratio, allows O2 gas to penetrate more effectively. This can lead to greater interaction of the gas within the sensor matrix, resulting in more sensitive detection. Higher Stern Volmer (Ksv) values, greater O2 -induced sensing capabilities, more linear spectral measurements over larger concentration ranges, and faster response and recovery times show that MOSs-doped [Ru(bpy)3]2+-based sensing agents make promising candidates as oxygen probes.

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Effects of NiO, SnO2, and Ni-doped SnO2 semiconductor metal oxides on the oxygen sensing capacity of H2TPP

Cited by 4 publications

References 65 publications

Improvement of the CO₂ Sensitivity: HPTS-Based Sensors along with Zn@SnO₂ and Sn@ZnO Additives

Improvement of the CO₂ Sensitivity: HPTS-Based Sensors along with Zn@SnO₂ and Sn@ZnO Additives

How the Interplay between SnO₂ and Zn(II) Porphyrins Impacts on the Electronic Features of Gaseous Acetone Chemiresistors

Enhancing the O2 sensitivity of [Ru(bpy)3]2+ dye by incorporating SnO2 and Ni:SnO2

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Effects of NiO, SnO2, and Ni-doped SnO2 semiconductor metal oxides on the oxygen sensing capacity of H2TPP

Cited by 4 publications

References 65 publications

Improvement of the CO2 Sensitivity: HPTS-Based Sensors along with Zn@SnO2 and Sn@ZnO Additives

Improvement of the CO2 Sensitivity: HPTS-Based Sensors along with Zn@SnO2 and Sn@ZnO Additives

How the Interplay between SnO2 and Zn(II) Porphyrins Impacts on the Electronic Features of Gaseous Acetone Chemiresistors

Enhancing the O2 sensitivity of [Ru(bpy)3]2+ dye by incorporating SnO2 and Ni:SnO2

Contact Info

Product

Resources

About

Improvement of the CO₂ Sensitivity: HPTS-Based Sensors along with Zn@SnO₂ and Sn@ZnO Additives

Improvement of the CO₂ Sensitivity: HPTS-Based Sensors along with Zn@SnO₂ and Sn@ZnO Additives

How the Interplay between SnO₂ and Zn(II) Porphyrins Impacts on the Electronic Features of Gaseous Acetone Chemiresistors