Facile engineering of metal–organic framework derived SnO2-ZnO composite based gas sensor toward superior acetone sensing performance

Ultrasensitive and Exclusive Chemiresistors with a ZIF-67-Derived Oxide Cage/Nanofiber Co3O4/In2O3 Heterostructure for Acetone Detection

“…However, pristine In 2 O 3 nanostructures exhibit relatively poor response, low selectivity, and low detection limit toward acetone. To enhance the sensing performance of In 2 O 3 nanostructures, several strategies have been proposed, such as constructing different heterogeneous structures, 10,11,14,30 decorating noble metal catalysis, 15 designing charge transfer hybrids, and introducing molecular detection and screening effects. It is noted that metal oxide nanostructures derived from metal−organic frameworks (MOFs) could be good sensing materials considering their unique hollow structure.…”

“…Meanwhile, acetone is also a flammable gas with a low flash point and autoignition temperature . On the other hand, acetone has long been known as a biomarker for fat burning at high concentrations, and the concentration of exhaled acetone may be correlated with the blood glucose level of diabetic patients. , The concentration of acetone in exhaled breath exceeding 1.8 ppm usually indicates a higher risk of diabetes, , as it relates to glucose metabolism and carbohydrate digestion in the human body. However, detecting acetone accurately in exhaled gases is a challenge due to the influence of moisture. , Therefore, for the sake of environmental protection, safety, and health concerns, there is an urgent need for precise and selective detection of acetone below ppm levels.…”

“…Sensing materials are considered the most crucial component of chemiresistive gas sensors. To date, various chemiresistive gas sensors, including metal oxide semiconductors (MOSs), ,,, metal dichalcogenides, , transition metal carbides or carbonitrides (Mxenes), , and carbonaceous materials, have attracted considerable attention. Among them, MOSs, such as In 2 O 3 , ,, ZnO, ,, SnO 2 , , WO 3 , CeO 2 , , Co 3 O 4 , and CuO, owing to their low cost, fast response time, simple fabrication, excellent stability, and rich active sites, have been widely used for detecting VOCs.…”

“…10 On the other hand, acetone has long been known as a biomarker for fat burning at high concentrations, and the concentration of exhaled acetone may be correlated with the blood glucose level of diabetic patients. 11,12 The concentration of acetone in exhaled breath exceeding 1.8 ppm usually indicates a higher risk of diabetes, 9,13 as it relates to glucose metabolism and carbohydrate digestion in the human body. However, detecting acetone accurately in exhaled gases is a challenge due to the influence of moisture.…”

“…To date, various chemiresistive gas sensors, including metal oxide semiconductors (MOSs), ,,, metal dichalcogenides, , transition metal carbides or carbonitrides (Mxenes), , and carbonaceous materials, have attracted considerable attention. Among them, MOSs, such as In 2 O 3 , ,, ZnO, ,, SnO 2 , , WO 3 , CeO 2 , , Co 3 O 4 , and CuO, owing to their low cost, fast response time, simple fabrication, excellent stability, and rich active sites, have been widely used for detecting VOCs. In 2 O 3 , a typical n-type semiconductor with a wide band gap of 2.6 eV, has good electrical and chemical stability.…”