Adsorption/Combustion-type Micro Gas Sensors: Typical VOC-sensing Properties and Material-design Approach for Highly Sensitive and Selective VOC Detection

Abstract

Volatile organic compounds (VOCs) are largely generated from new building materials, furniture, and household goods which are made of paints, resin, adhesives, and other petroleum products. They are well known to be essential substances responsible for the sick-house and building syndrome comprising headaches, eye irritation, sore nose and throat, dizziness, fatigue, nausea, and various nonspecific symptoms. 1,2 Many international institutes designate various gaseous organic chemicals such as formaldehyde, acetone, benzene, methylene chloride, and some

Programmable and Modularized Gas Sensor Integrated by 3D Printing

“…Thermal gas sensors operate by discerning gas species and concentrations through the detection of resistance variations in a thermistor, which arise due to changes in thermal conductivity across different gaseous environments or as a result of catalytic combustion reactions with flammable analytes. , These sensors are commonly categorized into two types: thermal conductivity gas sensors and thermochemical gas sensors. The core component for the thermal conductivity gas sensors is a thermal element designed to heat the surrounding gas environment, facilitating the transfer of heat from the heater to the ambient atmosphere. , The distinct thermal conductivities of various gases enable the identification of specific gas species and concentrations, which is achieved by monitoring the heat transfer rate of the gases and comparing it with a reference gas (Figure d).…”

Management of typical VOCs in air with adsorbents: status and challenges

“…Worth mentioning is that adsorption and concentration prior to the industries emitting VOCs are characterized as low concentration and high air volume is of great importance for the combustion process to reduce operating load and costs, reduce energy consumption and ensure combustion treatment efficiency. 8,9 Apparently, adsorption plays a vital role in VOCs elimination in both recycling and destruction processes and deserves special attention.…”

The Application of In Situ Methods to Monitor VOC Concentrations in Urban Areas—A Bibliometric Analysis and Measuring Solution Review

“…The implementation of sustainable urban development should involve the minimisation of environmental pollution [39]. Therefore, environmental monitoring is crucial [40]. Some VOCs are also classified as pollutants, mainly due to their negative impact on human health (e.g., skin and respiratory diseases) and comfort of living (e.g., odour nuisance).…”