Gas Sensor Detecting 3-Hydroxy-2-butanone Biomarkers: Boosted Response via Decorating Pd Nanoparticles onto the {010} Facets of BiVO₄ Decahedrons

Abstract

The newly emerged gas sensing detection of 3-hydroxy-2-butanone (3H-2B) biomarker is deemed as an effective avenue to indirectly monitor Listeria monocytogenes (LM). However, 3H-2B sensing materials requiring critically high sensitivity and selectivity, and ppblevel detection limit, remain challenging. Here, we report the advanced gas sensors built with bismuth vanadate microdecahedron (BiVO 4 MDCD) {010} facets selectively decorated with Pd nanoparticles (Pd NPs, Pd-{010}BiVO 4 MDCDs) for boosted detection of the 3H-2B biomarker. Meanwhile, BiVO 4 MDCDs with overall facets are randomly deposited with Pd NPs (Pd-BiVO 4 MDCDs). Comparatively, Pd-{010}BiVO 4 MDCD sensors show 1 order of magnitude higher response toward the 3H-2B biomarker at 200 °C. Further, Pd-{010}BiVO 4 MDCD sensors enable to detect as low as 0.2 ppm 3H-2B and show best selectivity and stability, and fastest response and recovery. Density functional theory calculations reveal a lower adsorption energy of 3H-2B onto Pd-{010}BiVO 4 MDCDs than those of pristine and Pd-BiVO 4 MDCDs. The extraordinary Pd-{010}BiVO 4 sensing performance is ascribed to the Pd NP-assisted synergetic effect of the preferential adsorption of 3H-2B target molecules, accumulated sensing agent of ionic oxygen species, and concentrated catalysts on the {010} facets. This strategy offers rapid and noninvasive detection of LMs and is thus of great potential in the upcoming Internet of Things.

Enhanced Response for Foodborne Pathogens Detection by Au Nanoparticles Decorated ZnO Nanosheets Gas Sensor

“…The indicators for comparisons mainly included the optimum working temperature, response to 3H-2B, response/recovery time, and LOD. According to the comparison, the properties of the 1.0% Au/ZnO NS sensor were almost superior in every index compared with other recently reported sensors reported [ 5 , 7 , 8 , 9 , 10 , 11 , 36 ]. Thus, it verified that the 1.0% Au/ZnO NS sensor had amazing application potential for the rapid, high-sensitivity, and good-selectivity detection of 3H-2B.…”

“…The O 1s patterns exhibited in Figure 4 c were resolved by a Gaussian function to three peaks at 529.6, 531.1, and 531.4 eV, which were characteristic peaks of adsorbed oxygen (O ads ), defect oxygen (O def ), and lattice oxygen (O lat ) [ 34 , 35 ]. The gas-sensing properties of sensitive materials were significantly affected by the valence of oxygen on their surfaces [ 28 , 36 ]. Figure 4 c,d show the ratio of O ads and O def in pure ZnO NS increased from 10.2% and 21.0% to 14.8% and 27.2% after Au NPs sensitizing.…”

Synergistic Effect of Au–PdO Modified Cu-Doped K2W4O13 Nanowires for Dual Selectivity High Performance Gas Sensing

“…Analysis of volatile organic compounds (VOCs) in exhaled breath and the environment via metal oxide sensors is a promising and inexpensive way to monitor serious diseases. Listeria monocytogenes (LM) is a foodborne pathogen and a facultative anaerobic bacterium that can survive in the absence and presence of O 2 , causing ailments or even death to a vulnerable population, such as pregnant women, the elderly, infants, and people with impaired immunity. − They usually are present in vegetables, fruits, salads, meat, and seafood, particularly those frozen ones . They release 3-hydroxy-2-butanone (3H-2B), a key gaseous species of VOCs at 32.18% .…”

“…They release 3-hydroxy-2-butanone (3H-2B), a key gaseous species of VOCs at 32.18% . 3H-2B can be used as a biomarker for diseases, such as lung cancer. , Similarly, triethylamine (TEA) is a common preservative, solvent, catalyst, extractant, and raw material of industries, which is often used in pharmaceuticals, perfumes, pesticides, dyes, fuels, antihardener, and paint remover. , TEA is a highly toxic gas that can affect human health, e.g., causing skin burn and dermatitis, headache, dizziness, somnolence, mucosal and eye lesions, nausea, and even death. , The threshold limit of TEA concentration in the air is about 10 ppm based on the Occupational Safety and Health Administration (OSHA) . Moreover, TEA can be used as a marker for monitoring the quality of food, such as seafood .…”

“…4 3H-2B can be used as a biomarker for diseases, such as lung cancer. 2,5 Similarly, triethylamine (TEA) is a common preservative, solvent, catalyst, extractant, and raw material of industries, which is often used in pharmaceuticals, perfumes, pesticides, dyes, fuels, antihardener, and paint remover. 6,7 TEA is a highly toxic gas that can affect human health, e.g., causing skin burn and dermatitis, headache, dizziness, somnolence, mucosal and eye lesions, nausea, and even death.…”