Recent advances in formaldehyde sensors: a review

Formaldehyde (HCHO), a common industrial compound, presents major health hazards to people, underscoring the importance of HCHO sensor development in public health surveillance. This review encapsulates the advancements made in HCHO sensors over the last 3 years. An explanation is provided for the fundamental aspects of HCHO detection methods, which depend on resistive sensors, quartz crystal microbalance sensors, and fluorescence sensors, along with an exploration of the various sensing materials employed. Discussions also encompass prospective research pathways and obstacles. Creating HCHO sensors holds significant promise for enhancing both public health and environmental safeguarding.