Effect of CTAB on the Morphology of Sn-MOF and the Gas Sensing Performance of SnO2 with Different Crystal Phases for H2 Detection DOI Creative Commons

Manyi Liu,

Liang Wang, Shan Ren

и другие.

Chemosensors, Год журнала: 2025, Номер 13(5), С. 192 - 192

Опубликована: Май 21, 2025

Herein, a facile strategy was proposed to enhance the gas sensing performance of SnO2 for H2 by regulating its crystalline phase composition. Sn-based metal–organic framework (Sn-MOF) precursors with different morphologies were synthesized introducing surfactant cetyltrimethylammonium bromide (CTAB). Upon calcination, these yielded either mixed-phase (orthorhombic and tetragonal, SnO2-C) or single-phase (pure SnO2-NC) nanoparticles. Structural characterization tests revealed that SnO2-C exhibited high response 7.73 100 ppm at 280 °C, more than twice SnO2-NC (3.75). Moreover, demonstrated faster response/recovery time (10/56 s), selectivity, ppb-level detection limit (~79 ppb), excellent long-term stability. Notably, although addition CTAB reduced specific surface area SnO2, resulting lower minimized oxygen exposure during facilitating formation heterostructure. In addition, calcination atmosphere (flowing air Ar) adjusted further investigate role crystal in performance. The results clearly superior performance, achieving higher sensitivity H2. These findings underscored critical engineering design high-performance materials.

Язык: Английский

Study of a Nanostructured Co-Doped SnO2 Sensor for Hydrogen Peroxide Vapor Detection Using Impedance Spectroscopy DOI Creative Commons

G. E. Shahnazaryan,

M. S. Aleksanyan, Artak Sayunts

и другие.

ACS Omega, Год журнала: 2025, Номер 10(14), С. 14452 - 14465

Опубликована: Апрель 6, 2025

A hydrogen peroxide vapor (HPV) sensor based on SnO2 doped with 1.3 at. % Co thin film has been fabricated using the high-frequency magnetron sputtering method. The thickness of ⟨Co⟩ was measured and surface morphology examined measurement profilometer scanning electron microscopy, respectively. crystalline properties sensing material were revealed by transmission microscopy. response, current-voltage, impedance characteristics in air presence various concentrations HPV at 25-200 °C. An equivalent electrical circuit for manufactured structure proposed, parameters its constituent elements determined. Furthermore, fitting frequency dependences calculated. It shown that charge transfer regulated processes mainly occurring grain boundaries gas-sensing film.

Язык: Английский

Процитировано

0
Effect of CTAB on the Morphology of Sn-MOF and the Gas Sensing Performance of SnO2 with Different Crystal Phases for H2 Detection DOI Creative Commons

Manyi Liu,

Liang Wang, Shan Ren

и другие.

Chemosensors, Год журнала: 2025, Номер 13(5), С. 192 - 192

Опубликована: Май 21, 2025

Herein, a facile strategy was proposed to enhance the gas sensing performance of SnO2 for H2 by regulating its crystalline phase composition. Sn-based metal–organic framework (Sn-MOF) precursors with different morphologies were synthesized introducing surfactant cetyltrimethylammonium bromide (CTAB). Upon calcination, these yielded either mixed-phase (orthorhombic and tetragonal, SnO2-C) or single-phase (pure SnO2-NC) nanoparticles. Structural characterization tests revealed that SnO2-C exhibited high response 7.73 100 ppm at 280 °C, more than twice SnO2-NC (3.75). Moreover, demonstrated faster response/recovery time (10/56 s), selectivity, ppb-level detection limit (~79 ppb), excellent long-term stability. Notably, although addition CTAB reduced specific surface area SnO2, resulting lower minimized oxygen exposure during facilitating formation heterostructure. In addition, calcination atmosphere (flowing air Ar) adjusted further investigate role crystal in performance. The results clearly superior performance, achieving higher sensitivity H2. These findings underscored critical engineering design high-performance materials.

Язык: Английский

Процитировано

0