Highly Selective Room-Temperature Blue LED-Enhanced NO2 Gas Sensors Based on ZnO-MoS2-TiO2 Heterostructures DOI Creative Commons
Soraya Y. Flores,

Elluz Pacheco,

Carlos Malca

и другие.

Sensors, Год журнала: 2025, Номер 25(6), С. 1781 - 1781

Опубликована: Март 13, 2025

This study presents the fabrication and characterization of highly selective, room-temperature gas sensors based on ternary zinc oxide–molybdenum disulfide–titanium dioxide (ZnO-MoS2-TiO2) nanoheterostructures. Integrating two-dimensional (2D) MoS2 with oxide nano materials synergistically combines their unique properties, significantly enhancing sensing performance. Comprehensive structural chemical analyses, including scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Raman spectroscopy, Fourier transform infrared (FTIR), confirmed successful synthesis composition The demonstrated excellent selectivity in detecting low concentrations nitrogen (NO2) among target gases such as ammonia (NH3), methane (CH4), carbon (CO2) at room temperature, achieving up to 58% sensitivity 4 ppm 6% 0.1 for NO2. prototypes outstanding a short response time approximately 0.51 min. impact light-assisted enhancement was examined under 1 mW/cm2 weak ultraviolet (UV), blue, yellow, red light-emitting diode (LED) illuminations, blue LED proving deliver highest sensor responsiveness. These results position ZnO-MoS2-TiO2 nanoheterostructures sensitive selective NO2 that are suitable applications environmental monitoring, public health, industrial processes.

Язык: Английский

Flower-like MoS2-Induced α-Fe2O3/Fe2(MoO4)3 Nanocomposite as an Ultrafast Sensor for Ethanol Detection DOI
Li Yin, T. Leon Yu,

J. Liu

и другие.

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

An ultrafast-responsive α-Fe2O3/Fe2(MoO4)3 nanocomposite was developed for the detection of ethanol vapor. The synthesized utilizing a green, normal-pressure, microwave-assisted method followed by an in situ solid-state reaction process with flower-like MoS2 as unique precursor. resulting composite presents porous, agminated petal-like structure α-Fe2O3 nanoparticles homogeneously attached to surfaces Fe2(MoO4)3 nanosheets. Systematic analyses have demonstrated that excels gas-sensing performance, exhibiting ultrafast response/recovery, high sensitivity, and selectivity vapor concentrations ranging from 1 50 ppm. 5-Fe2O3/Fe2(MoO4)3 sensor exhibits best properties comparison sensors other ratios. At optimal temperature 200 °C, achieves peak response ppm time 5 s 12.8. Notably, boasts impressive 3 at 240 while maintaining times under 6 recovery within min across range 160 °C. In addition, demonstrates good long-term stability. enhanced ethanol-sensing could be attributed its three-dimensional porous structure, synergistic effect between species, presence oxygen vacancy defects.

Язык: Английский

Процитировано

0
Highly Selective Room-Temperature Blue LED-Enhanced NO2 Gas Sensors Based on ZnO-MoS2-TiO2 Heterostructures DOI Creative Commons
Soraya Y. Flores,

Elluz Pacheco,

Carlos Malca

и другие.

Sensors, Год журнала: 2025, Номер 25(6), С. 1781 - 1781

Опубликована: Март 13, 2025

This study presents the fabrication and characterization of highly selective, room-temperature gas sensors based on ternary zinc oxide–molybdenum disulfide–titanium dioxide (ZnO-MoS2-TiO2) nanoheterostructures. Integrating two-dimensional (2D) MoS2 with oxide nano materials synergistically combines their unique properties, significantly enhancing sensing performance. Comprehensive structural chemical analyses, including scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Raman spectroscopy, Fourier transform infrared (FTIR), confirmed successful synthesis composition The demonstrated excellent selectivity in detecting low concentrations nitrogen (NO2) among target gases such as ammonia (NH3), methane (CH4), carbon (CO2) at room temperature, achieving up to 58% sensitivity 4 ppm 6% 0.1 for NO2. prototypes outstanding a short response time approximately 0.51 min. impact light-assisted enhancement was examined under 1 mW/cm2 weak ultraviolet (UV), blue, yellow, red light-emitting diode (LED) illuminations, blue LED proving deliver highest sensor responsiveness. These results position ZnO-MoS2-TiO2 nanoheterostructures sensitive selective NO2 that are suitable applications environmental monitoring, public health, industrial processes.

Язык: Английский

Процитировано

0