Hierarchical Self-Assembly of SnO2 Nanoparticles into Porous Microspheres: Exceptionally Selective Ammonia Sensing at Ambient DOI

Supraja Sankeshi,

Pooja Bajaj,

V. Sivasankaran

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(2), P. 3757 - 3771

Published: Jan. 6, 2025

Herein, porous SnO2 microspheres in a three-dimensional (3D) hierarchical architecture were successfully synthesized via facile hydrothermal route utilizing d-(+)-glucose and cetyltrimethylammonium bromide (CTAB), which act as reducing structure-directing agents, respectively. Controlled adjustment of the CTAB to glucose mole ratio, reaction temperature, time, calcination parameters all provided important clues toward optimizing final morphologies with exceptional structural stability reasonable monodispersity. Electron microscopy analysis revealed that formed self-assemblies numerous primary nanoparticles ∼3–8 nm coalesce together form nearly monodispersed ordered spherical structures sizes range 230–250 are appreciably porous. N2-sorption measurements further confirmed high degree porosity for these structures, an estimated BET surface area ∼35 m2 g–1. Taking advantage large area, ammonia (NH3) sensing capabilities spheres explored. The gas sensor exhibited notable response value (S) ∼20.72 when exposed 100 ppm NH3 gas, while operating at room temperature (∼27 °C), along impressively low detection limit ∼1 ppm. Based on comprehensive investigations, potential mechanism behind formation intricate factors make this material exhibit such excellent behavior is postulated. Overall, work provides possibly generic synthesis nanostructured materials holds promise development ultrasensitive temperature.

Language: Английский

Hierarchical Self-Assembly of SnO2 Nanoparticles into Porous Microspheres: Exceptionally Selective Ammonia Sensing at Ambient DOI

Supraja Sankeshi,

Pooja Bajaj,

V. Sivasankaran

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: 17(2), P. 3757 - 3771

Published: Jan. 6, 2025

Herein, porous SnO2 microspheres in a three-dimensional (3D) hierarchical architecture were successfully synthesized via facile hydrothermal route utilizing d-(+)-glucose and cetyltrimethylammonium bromide (CTAB), which act as reducing structure-directing agents, respectively. Controlled adjustment of the CTAB to glucose mole ratio, reaction temperature, time, calcination parameters all provided important clues toward optimizing final morphologies with exceptional structural stability reasonable monodispersity. Electron microscopy analysis revealed that formed self-assemblies numerous primary nanoparticles ∼3–8 nm coalesce together form nearly monodispersed ordered spherical structures sizes range 230–250 are appreciably porous. N2-sorption measurements further confirmed high degree porosity for these structures, an estimated BET surface area ∼35 m2 g–1. Taking advantage large area, ammonia (NH3) sensing capabilities spheres explored. The gas sensor exhibited notable response value (S) ∼20.72 when exposed 100 ppm NH3 gas, while operating at room temperature (∼27 °C), along impressively low detection limit ∼1 ppm. Based on comprehensive investigations, potential mechanism behind formation intricate factors make this material exhibit such excellent behavior is postulated. Overall, work provides possibly generic synthesis nanostructured materials holds promise development ultrasensitive temperature.

Language: Английский

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