Detection of CO2 in solution with a Pt–NiO solid-state sensor

Yue, Zhao; Niu, Wencheng; Zhang, Wei; Li, Guohua; Parak, Wolfgang J.

doi:10.1016/j.jcis.2010.04.020

Cited by 15 publications

(6 citation statements)

References 46 publications

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“…The CO 2 pressure of a sample gas or liquid equilibrates through the membrane, and the glass electrode measures the resulting pH of the bicarbonate solution. The solid-state electrolyte detection typically relies on charged ion conductance generated at the expense of high power consumption (300–800 °C), which limits their application in potentially flammable and explosive environments. − Optical detection for dCO 2 is based on the dCO 2 -induced changes in absorbance, ,− fluorescence intensity or fluorescence lifetime, ,− electrochemiluminescence, and surface plasmon resonance (SPR)-based optical sensor . Table summarizes representative optical methods for the CO 2 detection.…”

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confidence: 99%

Detection of Dissolved CO₂ Based on the Aggregation of Gold Nanoparticles

Yung

2014

Anal. Chem.

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A sensitive colorimetric assay of dissolved CO2 (dCO2) was developed based on the plasmon shift of gold nanoparticles (AuNPs). A water-soluble random copolymer poly(dimethyl acrylamide-co-(N-amidino)ethyl acrylamide), or P(DMA-co-NAEAA), containing amidine groups was synthesized. In the presence of dCO2, the amidine groups in the NAEAA block protonate and convert the polymer from a neutral to a positive-charged state, hence triggering the negative-charged AuNPs to aggregate by the electrostatic interaction. The degree of AuNP aggregation is dependent on the charge density of polymer, which is related to dCO2 concentration. The aggregation of AuNPs results in a red shift of the AuNP plasmonic spectrum, or a color change from red to blue. In addition, dCO2 concentration can be quantitatively measured by the UV absorbance change of the AuNP solution. A linear relationship between 0.264 and 6.336 hPa of dCO2 with a limit of detection (LOD) of 0.04 hPa can be acquired. This is the first report to detect dCO2 using the optical properties of nanoparticles.

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confidence: 99%

Detection of Dissolved CO₂ Based on the Aggregation of Gold Nanoparticles

Yung

2014

Anal. Chem.

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“…x 0.0295 log CO2(g) (9) where K′ = 0.059 pH 0 + 0.059 × log γ + 0.0295 × log(K g K s K 1 P Θ ) and γ is the activity coefficient.…”

Section: ■ Calculationsmentioning

confidence: 99%

“…As a significant parameter for quality control, the quantification of CO 2 in the gas phase is of great importance in many fields, such as the food and agricultural industry and in environment engineering . Several methods have been proposed, such as IR, fluorescence, and electrochemistry. , Among the various proposed sensing methods, sensors based on fluorescence or electrochemical methods have been developed for their high selectivity and sensitivity. In addition, indirect detection of CO 2 was carried out by measuring the potential of carbonic acid formed in water with Severinghaus electrodes , and by pH-sensitive hydrogel-based sensor …”

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confidence: 99%

“…5 Several methods have been proposed, such as IR, 6 fluorescence, 7 and electrochemistry. 8,9 Among the various proposed sensing methods, sensors based on fluorescence 10 or electrochemical 11 methods have been developed for their high selectivity and sensitivity. In addition, indirect detection of CO 2 was carried out by measuring the potential of carbonic acid formed in water with Severinghaus electrodes 12,13 and by pH-sensitive hydrogel-based sensor.…”

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confidence: 99%

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Direct Determination of Gas pH and Carbon Dioxide Concentration with pH Electrodes

et al. 2014

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A simple apparatus to measure gas pH and carbon dioxide (CO 2 ) concentration was designed for undergraduate students in the analytical chemistry laboratory. Gas passed through a flow meter and a mixer, then reached the homemade measuring chamber and caused the potential change of a pH combination electrode. Poly(ethylene glycol)-20000 aqueous solutions with hygroscopicity and nontoxicity were used as reaction media by forming absorption liquid films around the junction point and the bulb of the pH combination electrode. A laboratory-made voltage follower and a N2000 chromatography data system were used to transform impedance and record data, respectively. Gas samples containing 10−100% CO 2 were measured with the apparatus, and fast potential responses for different concentrations of CO 2 were obtained. This apparatus is more cost-effective and ecofriendly as compared with other conventional methods.

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“…On the other hand, the sensing material is responsible for interacting with the target gases and transforming the chemical signals into electrical signals. Semiconducting metal oxides (SMO) such as stannic oxide (SnO 2 ) [29,30], zinc oxide (ZnO) [31,32], tungsten oxide (WO 3 ) [33,34], copper oxide (CuO) [35,36], indium oxide (In 2 O 3 ) [37,38], nickel oxide (NiO) [39,40] and titanium oxide (TiO 2 ) [41,42], are generally regarded one class of the most promising sensing materials for their chemical stability, simple processing, low cost, and high sensitivity performance.…”

Section: Introductionmentioning

confidence: 99%

Electrically Transduced Gas Sensors Based on Semiconducting Metal Oxide Nanowires

Wang

Duan

Deng

et al. 2020

Sensors

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Semiconducting metal oxide-based nanowires (SMO-NWs) for gas sensors have been extensively studied for their extraordinary surface-to-volume ratio, high chemical and thermal stabilities, high sensitivity, and unique electronic, photonic and mechanical properties. In addition to improving the sensor response, vast developments have recently focused on the fundamental sensing mechanism, low power consumption, as well as novel applications. Herein, this review provides a state-of-art overview of electrically transduced gas sensors based on SMO-NWs. We first discuss the advanced synthesis and assembly techniques for high-quality SMO-NWs, the detailed sensor architectures, as well as the important gas-sensing performance. Relationships between the NWs structure and gas sensing performance are established by understanding general sensitization models related to size and shape, crystal defect, doped and loaded additive, and contact parameters. Moreover, major strategies for low-power gas sensors are proposed, including integrating NWs into microhotplates, self-heating operation, and designing room-temperature gas sensors. Emerging application areas of SMO-NWs-based gas sensors in disease diagnosis, environmental engineering, safety and security, flexible and wearable technology have also been studied. In the end, some insights into new challenges and future prospects for commercialization are highlighted.

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Detection of CO2 in solution with a Pt–NiO solid-state sensor

Cited by 15 publications

References 46 publications

Detection of Dissolved CO₂ Based on the Aggregation of Gold Nanoparticles

Detection of Dissolved CO₂ Based on the Aggregation of Gold Nanoparticles

Direct Determination of Gas pH and Carbon Dioxide Concentration with pH Electrodes

Electrically Transduced Gas Sensors Based on Semiconducting Metal Oxide Nanowires

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Detection of CO2 in solution with a Pt–NiO solid-state sensor

Cited by 15 publications

References 46 publications

Detection of Dissolved CO2 Based on the Aggregation of Gold Nanoparticles

Detection of Dissolved CO2 Based on the Aggregation of Gold Nanoparticles

Direct Determination of Gas pH and Carbon Dioxide Concentration with pH Electrodes

Electrically Transduced Gas Sensors Based on Semiconducting Metal Oxide Nanowires

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Detection of Dissolved CO₂ Based on the Aggregation of Gold Nanoparticles

Detection of Dissolved CO₂ Based on the Aggregation of Gold Nanoparticles