Detection Of Acetone Research Articles

Mesoporous NiFe2O4 nanorods functionalized Pt catalysts dictates highly sensing performance to acetone detection

NiFe2O4 is a promising sensing material for acetone detection, in which synthesizing 1D nanostructure and modulating the chemical composition are efficient strategies to enhance the sensing properties for multiple applications in reality. Herein, 1D precursor is hydrothermally synthesized using nitrilotriacetic acid (NTA) to chelate Fe3+ and Ni2+ ions. After thermal annealing, nanoparticles assembled 1D NiFe2O4 nanorods with mesoporous structures are prepared. The porous 1D structure yields a large surface area (197.1 m2/g), exposes more active sites as well as offers a suitable backbone for Pt nanoparticles functionalization, facilitating acetone detection. The gas sensor based on Pt functionalized NiFe2O4 nanorods exhibits high response of 48.2–100 ppm acetone at 160 °C with a rapid response and recovery time (10 s/26 s), low limits of detection (1 ppm), good selectivity, outstanding repeatability and reliable long-term durability (30 days). In addition, a good linearity of the response as a function of the acetone concentration from 1 to 200 ppm is fitted. These results may open a novel avenue to fabricate mesoporous 1D NiFe2O4 that is an extremely promising candidate for acetone detection.

WO3 nanoparticles supported by Nb2CTx MXene for superior acetone detection under high humidity

Chemiresistive gas sensors have emerged as a promising generation of detection systems for identifying trace biomarker molecules in exhaled breath, potentially replacing conventional devices for early-stage disease diagnosis. However, their potential is currently limited by the absence of sensing materials that exhibit both humidity resistance and ultrasensitivity. In this study, we investigate the potential of WO3 nanoparticles (NPs) supported by Nb2CTx MXene (WO3/Nb2CTx) as a highly efficient material for acetone sensing. Our results demonstrate that the synergistic interplay between WO3 NPs and Nb2CTx MXene support generates an intriguing interface with chemical/electronic coupling, thereby further enhancing the gas sensing performance. The WO3/Nb2CTx sensor exhibits exceptional sensing performance for acetone, with ultrasensitivity (Ra/Rg = 2.4 at 50 ppb) and an ultrafast response time (8 s), surpassing that of WO3 alone, while maintaining excellent stability. Moreover, the sensor exhibits outstanding response intensity, rapid response time (9 s), superior selectivity, and remarkable reversibility at a relative humidity of approximately 90 %. Additionally, we evaluate the gas-sensing properties of the sensor towards simulated exhaled breath of diabetic patients. In conclusion, our study presents a novel approach that integrates NPs and MXenes, which holds promise for the development of gas sensors with resistance to humidity interference.

High performance acetone sensor based on yttria stabilized-zirconia and NiGaxAl2-xO4 (x = 0, 0.6, 1 and 1.4) sensing electrode

In this paper, YSZ-based high performance acetone sensor was successfully developed for intelligent medical service, environmental monitoring, and safety production of smart city. New type spinel electrode sensing materials NiGaxAl2-xO4 (x = 0, 0.6, 1 and 1.4) were synthesized by a sol-gel method. Compared to the other sensing electrode materials, NiGa0.6Al1.4O4 had the highest electrochemical catalytic activity to acetone, and the sensor based on NiGa0.6Al1.4O4-SE performed the best sensing performance of −48 mV to 10 ppm acetone. Moreover, the present acetone sensor has a wide detection range of 0.2–1000 ppm, with sensitivity of −45 mV/decade, meeting the field of diabetic non-invasive diagnosis and real-time in-situ environmental monitoring. In addition, the device also performs excellent repeatability, acceptable selectivity, terrific humidity resistance and marvelous long-term stability during continuous measurements over 30 days. Overall, based on its excellent sensing performance, the developed sensor has marvelous application prospects for acetone detection in intelligent medical service, environmental monitoring, and safety production fields of smart city.

Low-limit acetone detection system combining quantum conductance and capacitance signal analyses derived from oxidized single-layer graphene

This paper introduces a cutting-edge sensing technology that combines quantum conductance and capacitance signal analyses extracted from impedance measurements for the detection of acetone in gaseous or liquid forms. The electrochemical oxidation of a single-layer graphene (SLG) was employed through chronoamperometry, resulting in enhanced acetone sensing capability, enabling potential diabetes control using acetone as a marker. The modified SLG exhibits a distinct impedance response, offering access to the concentration of oxidized groups as a secondary signal in the capacitive Nyquist diagram. This methodology involves measuring the quantum conductance and capacitance of oxidized single-layer graphene by the Quantum Rate theory and applying these highly sensitive signals to measure acetone. Significantly low limits of detection were attained (∼ 0.13 nM). This study confirms that measuring the quantum properties of chemically modified graphene layers can be used to track environmental changes caused by different acetone concentrations. The findings reported here constitute a proof-of-concept that rightly modified 2D-carbonaceous materials can serve as effective analytical and sensing tools for the detection of acetone in the medical field of diabetes management.

Effective detection of acetone by ZnFe2O4 microspheres decorated with g-C3N4 nanosheets

A single SMO limits the adsorption of gas, resulting in poor performance of the gas sensor. Herein, two-dimensional (2D) graphitic carbon nitride (g-C3N4) were modified on ZnFe2O4 microspheres as efficient gas sensing materials via hydrothermal route. The modification of g-C3N4 can alter the energy band structure of ZnFe2O4, resulting in an increase in the bandgap, thus, effectively optimizing the carrier concentration in ZnFe2O4 and elevating the baseline resistance of ZnFe2O4/g-C3N4 microspheres. The sensor based on ZnFe2O4/g-C3N4-20 microspheres (mass ratio of ZnFe2O4: g-C3N4 =10:2) had a higher response value (53.3) which was 3.4 times higher than that of ZnFe2O4, better selectivity and rapid response/recovery speeds towards 100 ppm acetone, as well as a low detection limit of 255 ppb. The enhanced performance of ZnFe2O4/g-C3N4 microsphere could be ascribed to the catalysis of C3N4, regulating the energy structure, and heterojunction formation between ZnFe2O4 and g-C3N4. Thus, this work demonstrated their promising applications in various fields.

Decoration of Pt/Pd bimetallic nanoparticles on Ru-implanted WS2 nanosheets for acetone sensing studies

Bimetallic decoration is a promising technique for enhancing the gas-sensing characteristics of resistive sensors. In this study, pristine WS2 nanosheets (NSs), Ru-implanted WS2 NSs, separate Pt and Pd nanoparticles (NPs) decorated on Ru-implanted WS2 NSs, and Pt/Pd bimetallic NPs decorated on Ru-implanted WS2 NSs sensors were prepared and utilized for acetone detection in self-heating operations at low applied voltages (1–5 V). The gas sensors were characterized by employing various techniques to explore their phases, morphologies, and chemical compositions. The Ru-implanted WS2 NSs sensor decorated with Pt/Pd bimetallic NPs exhibited good selectivity and fast dynamics toward acetone. Also, the optimized sensor displayed an acceptable response to acetone even in a high-humidity environment. The enhanced acetone sensing of the optimized gas sensor was related to the spillover and catalytic effects of the implanted Ru and Pt/Pd NPs on acetone, enhanced oxygen ionosorption with the formation of defects under implantation, and the formation of Schottky barriers between Pt/Pd and Ru-implanted WS2. We successfully demonstrated the potential of this novel sensing material for room-temperature acetone sensing.

Flower-like In2O3-ZnO nanosensor with improved acetone performance at low temperature

In2O3-ZnO nanoflower-like acetone gas sensors with varied reaction time were created using a simple and green synthesis idea. Morphological and structural analysis indicated that the In2O3-ZnO nanoflowers were made up of nanoplates with a thickness of around 35–60 nm and some small nanoparticles with the particle size of about 11 nm adhered to the surface. With a sensitivity of 238 for 100 ppm acetone at 140 °C, a lower detection limit as low as 0.64 ppm, good selectivity and excellent stability, the In-Zn(5) sensor with a hydrothermal time of 5 h has the most excellent performance. The enhanced gas-sensitive performance of In-Zn(5) can be attributed to the heterogeneous structure between the two and the three-dimensional flower-like structure with a large specific surface area and fast gas transfer rate. This work brings a better prospect for the future detection of acetone.

Synthesis-in-place hydrothermal growth of hematite nanorods on patterned substrate for highly sensitive and rapid acetone detection

Hematite (α-Fe2O3) is an attracting gas sensing material for detecting volatile organic compounds due to its adjustable semiconducting properties and abundant reserves. However, its low sensitivity in thin film structures requires the design of nanostructures for practical applications. Herein, we present a facile hydrothermal method for directly grown hematite nanorods on patterned SiO2/Si substrate. It was demonstrated that hematite nanorods were synthesized directly on the area of Pt interdigitated electrodes on a SiO2/Si substrate using a one-step hydrothermal synthesis process. The optimal synthesis conditions were determined by analyzing the morphology and gas sensing performance of hematite nanorods, which varied with synthesis time. Rapid response time of less than 5 s to acetone at 350 °C was achieved with pristine hematite nanorods. To improve the gas sensing properties, hematite nanorods were decorated with Au nanoparticles, dramatically enhanced sensitivity and selectivity to acetone in comparison with the sensing properties of pristine hematite nanorods. Furthermore, the sensors displayed rapid response and long-term stability. Our synthesis-in-place hydrothermal method for hematite nanorods expands the potential use of this strategy to fabricate high-performance gas sensors with various nanostructured metal oxides.

Black phosphorus nanosheets-sensitized Zn-doped α-Fe2O3 nanoclusters for trace acetone detection

Acetone vapor not only poses a significant threat to the ecological environment and human health but serves as a specific volatile organic compounds (VOCs) biomarker within the exhaled breath to distinguish individual diabetes, thereby urgently necessitating a sensitive and selective acetone detection. To this end, conductometric gas sensors featuring black phosphorus nanosheets (BP)-decorated Zn-doped hematite (α-Fe2O3) nanoclusters as the sensitive material were prepared. By subtly modulating the componential ratio and operation temperature, the optimal Zn-doped α-Fe2O3/BP sensor delivered a prominent response of 5.32 and short response/recovery times of 8/68 s toward 0.5 ppm acetone at 160 °C as well as a large sensitivity of 5.3/ppm over the concentration range of 0.1–1.5 ppm. Moreover, favorable selectivity, repeatability, and long-term stability were demonstrated. The superior sensing performance after incorporating a tiny but moderate amount of BP over Zn-doped α-Fe2O3 sensors could be attributed to the consequent enlarged specific surface area, increased oxygen vacancies, and numerous p-n heterojunctions. Furthermore, additional polylactic acid (PLA) encapsulation membrane endowed the as-prepared sensors with a remarkably improved humidity tolerance, showcasing a huge application potential in non-invasive diabetes diagnosis from exhaled breath featuring high-humidity conditions in the future.

Liquid-crystal-based fiber laser sensor for non-invasive gas detection.

This Letter reports a new optical fiber gas sensor for measuring breath acetone. The sensor is based on photonic bandgap (PBG) mode laser emission sensing technology using liquid crystal (LC), which is combined with silica fiber and chiral nematic liquid crystal (CNLC), thus providing an ultra-compact, fast-response and simple-to-produce sensing system with a fast response that can accurately and quantitatively determine the concentration of respiratory acetone within the normal oral temperature range (35-38°C). Since LCs are affected by temperature, we propose a method that eliminates the influence of the temperature to solve the problem of the temperature influence when measuring gas. The detection of acetone leads to splitting of the dual laser peaks, with a linear correlation of 0.99. The sensor has a limit of detection of 65 ppm for acetone vapor and thus is suitable for breath acetone detection in diabetic patients.

Theoretical study on the interaction between acetone and BN monolayer doped with Ni for the clinical diagnosis of diabetes mellitus

Endogenous volatile organic compounds (VOCs) in human exhaled gases can reflect human health status and be used for clinical diagnosis and health monitoring. Acetone is the sign VOC gases of diabetes mellitus. In order to find a potential material for the detection of acetone in the application of the clinical diagnosis of diabetes mellitus. The adsorption properties, including adsorption energy, adsorption distance, charge transfer, density of states, electron localization function and electrons density difference, of acetone on BN monolayer doped with Ni were comprehensively investigated based on density functional theory. The results show that there could be chemisorption between acetone and Ni-BN monolayer and Ni-BN monolayer is probably suitable gas sensitive material for the detection of acetone in the application of diabetes mellitus monitoring and clinical diagnosis.

Selective and rapid detection of acetone using aluminum-doped zno-based sensors

Selective and rapid detection of acetone using aluminum-doped zno-based sensors

Ultrasensitive room-temperature geranyl acetone detection based on Fe@WO 3− x nanoparticles in cooked rice flavor analysis

Ultrasensitive room-temperature geranyl acetone detection based on Fe@WO _{3− <i>x</i>} nanoparticles in cooked rice flavor analysis

Low level detection of acetone vapor by improvised design of high “Q” tunable frequency Helmholtz photoacoustic cell using UV, mid- IR and THz sources

The paper reports the designing and fabrication aspects of a high “Q = 492.3” Helmholtz photoacoustic (PA) cell employed for the trace level detection of acetone, a biomarker by using 266 nm- UV, Mid-IR (5.4–10.6 micron) and 0.11 Terahertz (THz) sources. The designed Helmholtz PA cell is made of Aluminum and possesses a natural frequency tunable between 1.4 to 4.4 kHz range using a movable piston arrangement of the microphone sensor. Numerous types of disorders, including diabetes, asthma, lung cancer, etc., can be diagnosed using the acetone concentration obtained through breath analysis. The comparative study is related to the response of different types of excitation mechanisms contributed by electronics, vibrational and rotational modes of acetone. The low-level detection (LoD) limit for acetone is of the order of 5.06 & 7.92 ppbV, and 15.3 pptV, respectively, in UV, Mid-IR, and THz region. This study contributes to the development of a highly sensitive, non-invasive acetone detection and quantification modality.

Detection of acetone in the human breath as diabetes biomarker based on PPy/WO3 nanocomposite sensor by FFT continuous cyclic voltammetry method

AbstractThis research represents a novel detection method of acetone level in the exhaled breath samples (RH=88 %) based on polypyrrole/tungsten oxide (PPy/WO3) nanocomposite sensor. The PPy/WO3 sensor was fabricated by the deposition of nanocomposite on/between interdigitated electrodes (IDEs) through electrospray coating and was then characterized by FE‐SEM imaging. In this detection method, the coulometric signal of the sensor was calculated using Fast Fourier Continuous Cyclic Voltammetry (FFTCCV), where cyclic voltammetry (CV) was applied to the sensor in the defined potential rang and then charge changes of the sensor was obtained by integration of the current in all scanned potential ranges. FFTCCV method enhances the sensitivity of the sensor when exposed to the gas mixtures containing acetone. In addition to its fast coulometric response time (≤5 s) in the two linear ranges of 0.7–2.8 ppm and 2.8–28.2 ppm (R2=0.99), FFTCCV method provides the low detection limit of 70 ppb, and high sensitivity toward acetone at the optimum values of the parameters. The fabricated sensor showed great selectivity toward acetone when exposed to humid air and some exhaled gas like carbon dioxide, ammonia, methanol, ethanol and alkyl amines. The results were very satisfying as the sensor was capable to detect different acetone levels in human exhaled breath as non‐invasive diagnosis of diabetes with a good correlation (R2≃0.9) to the routine blood sugar test taken by different commercial glucometers results.

Facile synthesis and enhanced acetone sensing properties of ZnO/TiO2 nanocomposite at room temperature

This paper reports a clear outline of the synthesis and gas-sensing characteristics of pure ZnO, TiO2 nanoparticles (NPs) and ZnO/TiO2 (ZT) nanocomposite (NC) for acetone detection at room temperature for diabetes screening. Thesamples were synthesized using an uncomplicated low-cost co-precipitation method. The ZT nanocomposites have shown a combined phase structure of ZnO (wurtzite) and TiO2 (anatase) from X-ray diffraction. The absorbance of the samples was analyzed by UV–Vis Spectrophotometer and a variation in the optical bandgap is studied.A high-performance ZT NC gas sensor is successfully realized for excellent selectivity, and quick response-recovery towards acetone detection. The sensing mechanism is ascribed to the composition, morphology, and enhanced oxygen adsorptionsites revealing better performances than the pure ZnO and TiO2 NPs. The ZT NC of composition ZnO (0.60 at.%):TiO2 (0.40 at.%) is observed to enhance the acetonegas detection signal for the lowest sub micro level ppb concentration of 100 ppb (parts per billion) in comparison to the pure ZnO and TiO2 nanoparticles. A superior response time (τres) of 13 s and recovery time (τrec) of 11 s are observed for ZT-1 sample with a high sensitivity response of 179 % is studied and therefore the nanocomposite material can be successfully utilized for acetone biomarker in diabetes.

Separated detection of ethanol and acetone based on SnO2-ZnO gas sensor with improved humidity tolerance

Developing separated detection of ethanol and acetone for semiconductor oxides based gas sensors with relative stable gas response under different humidity is of great significance to practical application. Herein, a unique mesoporous SnO2-ZnO hierarchical structure has been prepared by a facile one-step hydrothermal method. Several characterizations for SnO2-ZnO samples have been carried out and the gas sensing properties of all gas sensors have been systematically investigated and analyzed. The results indicate that the optimal working temperature for ethanol detection will decrease from 275°C to 250°C, while the optimal working temperature for acetone detection will maintain at same temperature of 300°C with Sn2+ doping ratio increasing. For ethanol detection, 10 at% SnO2 modified ZnO gas sensor has the highest gas response, and the humidity tolerance has been obviously improved compared with those of lower Sn element doping ratios (1 at% and 5 at%) at 250°C. Moreover, the detection limit for ethanol and acetone can reach as low as 200 ppb with high SnO2 contents (10 at% and 15 at%). The improved gas sensing performance could be mainly attributed to the unique morphology of sensing material and the synergistic effect of SnO2 and ZnO.

Defective WO3 Nanosheets with (002)-Exposed Facet for Highly Sensitive Acetone Detection

Defective WO₃ Nanosheets with (002)-Exposed Facet for Highly Sensitive Acetone Detection

Polymer transduction cavity based optical fiber Fabry-Perot interferometer for VOC sensing

Frequent exposure to volatile organic compounds (VOC) above the permissible limit can result in adverse health effects. Therefore, VOC detection and monitoring at trace levels are essential in both indoor and outdoor environments. A highly sensitive and accurate method is desired for this purpose and optical interferometry is a sensitive measurement technique useful for trace-level VOC sensing. We have fabricated and experimentally studied the sensing properties of the optical fiber Fabry–Perot interferometer polymer sensor cast on the fiber tip for acetone detection. Polystyrene, deposited at the end facet of the fiber act as the FP cavity. A significant shift in the interference pattern resonant dip positions is observed in the interaction of the FP cavity with acetone vapor due to changes in the properties of the polymer resulting in physical thickness variation and a change in refractive index. Emphasis has been put on studying the sensor performance over multiple measurement cycles to affirm the reproducibility of the results for repeated usage instead of one-time disposable measurements. Excellent repeatable sensing performance with a sensitivity of 5.78 pm/ppm is observed for 09 data sets recorded over 09 days consisting of 190 individual experimental studies.

ZIF-8/MWCNT-nanocomposite based-resistive sensor for highly selective detection of acetone in parts-per-billion: Potential noninvasive diagnosis of diabetes

Zeolitic imidazolate framework-8 (ZIF-8) is a promising metal-organic framework for gas sensing applications in humid conditions due to its inherent hydrophobicity. However, its low sorption capacity for alcohols and acetone at room temperature and atmospheric pressure limits its applications. To overcome this, a novel composite of ZIF-8 and bare multiwall-carbon-nanotubes (MWCNTs) was developed, significantly enhancing its sorption capacity for alcohols and acetone. A ZIF-8/MWCNT-coated quartz crystal microbalance (QCM) sensor successfully detected these volatile organic compounds (VOCs) at 0.62 parts-per-million (ppm) under ambient conditions, a marked improvement over ZIF-8 alone. However, selectivity towards acetone, a crucial biomarker for diabetes, is lacking when other VOCs are present. This study investigates the effect of different sensing platforms with varying response mechanisms on achieving high selectivity for acetone using a ZIF-8/MWCNT-coated QCM and a chemiresistive sensor. The chemiresistive-sensor demonstrated excellent acetone detection performance, with high selectivity, low humidity response, good repeatability, complete reversibility, and rapid response. Remarkably, it achieved a limit of detection of 1.7 parts-per-billion (ppb) at ambient conditions, three orders of magnitude lower than the concentration in the exhaled breath of diabetic patients (1.8 ppm). This breakthrough highlights the high potential of the sensor for diabetes diagnosis and monitoring through breath analysis.