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Related Concept Videos

Thermosensation01:43

Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Nanostructured Ag-zeolite Composites as Luminescence-based Humidity Sensors
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Room Temperature Humidity Tolerant Xylene Sensor Using a Sn-SnO2 Nanocomposite.

Mohit Verma1, Gaurav Bahuguna1, Arpit Saharan1

  • 1Advanced Materials and Devices Laboratory, Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan342037, India.

ACS Applied Materials & Interfaces
|January 18, 2023
PubMed
Summary
This summary is machine-generated.

This study developed a tin-doped tin oxide nanocomposite sensor for detecting xylene, a common indoor air pollutant. The sensor offers high sensitivity and rapid response at room temperature, even in humid conditions.

Keywords:
VOC sensorindoor pollutionnanospheretin oxidexylene

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Environmental Science

Background:

  • Xylene is a significant indoor air pollutant affecting human health.
  • Detecting non-polar and less reactive xylene at room temperature is challenging.

Purpose of the Study:

  • To develop a sensitive room-temperature sensor for xylene detection.
  • To synthesize a metallic tin-doped Sn-SnO2 nanocomposite for enhanced gas sensing.

Main Methods:

  • A simple solvothermal route was used to synthesize Sn-SnO2 nanocomposite.
  • The sensor's performance was evaluated for xylene and other VOCs under varying humidity.
  • Characterization of the nanocomposite morphology and surface area was performed.

Main Results:

  • The Sn-SnO2 nanocomposite exhibited uniform Sn nanoparticles within SnO2 nanospheres (∼70 nm) with a high surface area (118.8 m²/g).
  • The sensor showed a strong affinity for benzene, toluene, ethylbenzene, and xylene (BTEX), with the highest response to xylene.
  • A linear response to xylene (1-100 ppm) was observed at room temperature, with a sensitivity of ∼255% at 60 ppm, a response time of ∼1.5 s, and a recovery time of ∼40 s.
  • The sensor demonstrated minimal interference from humidity variations (40-70%).

Conclusions:

  • The mesoporous nanosphere morphology facilitates VOC diffusion.
  • Metallic tin enhances the affinity for xylene at room temperature.
  • The nanocatalytic Sn-SnO2 nanocomposite is an effective material for sensing indoor pollutants under humid conditions.