Review of Dissolved Oxygen Detection Technology: From Laboratory Analysis to Online Intelligent Detection

Wei, Yaoguang; Jiao, Yisha; An, Dong; Li, Bingbing; Li, Wenshu; Wei, Qiong

doi:10.3390/s19183995

Cited by 127 publications

(92 citation statements)

References 184 publications

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“…However, the linearity is slightly less due to the added gold nanoparticles with a quite larger deviation in readings, compared to the pure ceria nanoparticles case. In addition, our newly gold-ceria nanoparticles were found to have higher KSV, and consequently, the sensing sensitivity to DO was more quenched compared to other sensing materials used in literature which had a range of KSV from less than 1 M −1 to 115 M −1 [24][25][26]. Depending on the results from Figure 3, the relative intensity versus the concentration of added DO is plotted in Figure 5.…”

Section: Resultsmentioning

confidence: 86%

In-Situ Gold–Ceria Nanoparticles: Superior Optical Fluorescence Quenching Sensor for Dissolved Oxygen

Shehata

Kandas

2020

Nanomaterials

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Cerium oxide (ceria) nanoparticles (NPs) have been proved to be an efficient optical fluorescent material through generating visible emission (~530 nm) under violet excitation. This feature allowed ceria NPs to be used as an optical sensor via the fluorescence quenching Technique. In this paper, the impact of in-situ embedded gold nanoparticles (Au NPs) inside ceria nanoparticles was studied. Then, gold–ceria NPs were used for sensing dissolved oxygen (DO) in aqueous media. It was observed that both fluorescence intensity and lifetime were changed due to increased concentration of DO. Added gold was found to enhance the sensitivity of ceria to DO quencher detection. This enhancement was due to optical coupling between the fluorescence emission spectrum of ceria with the surface plasmonic resonance of gold nanoparticles. In addition, gold caused the decrease of ceria nanoparticles’ bandgap, which indicates the formation of more oxygen vacancies inside the non-stoichiometric crystalline structure of ceria. The Stern–Volmer constant, which indicates the sensitivity of optical sensing material, of ceria–gold NPs with added DO was found to be 893.7 M−1, compared to 184.6 M−1 to in case of ceria nanoparticles only, which indicates a superior optical sensitivity to DO compared to other optical sensing materials used in the literature to detect DO. Moreover, the fluorescence lifetime was found to be changed according to the variation of added DO concentration. The optically-sensitivity-enhanced ceria nanoparticles due to embedded gold nanoparticles can be a promising sensing host for dissolved oxygen in a wide variety of applications including biomedicine and water quality monitoring.

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Section: Resultsmentioning

confidence: 86%

In-Situ Gold–Ceria Nanoparticles: Superior Optical Fluorescence Quenching Sensor for Dissolved Oxygen

Shehata

Kandas

2020

Nanomaterials

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“…A further systematic investigation is necessary to explain the effects of interferences such as temperature, salinity, pH and bubbles on the performance of intelligent sensors, and this research is being conducted in our laboratory. In addition, the integration of DO sensors with temperature, salinity and pH sensors to realize automatic and real-time dynamic compensation and correction of temperature, salinity, pH and other interference factors is the development trend of intelligent dissolved oxygen sensors [ 11 ], which is also the focus of our future research.…”

Section: Discussionmentioning

confidence: 99%

“…The most wildly used electrochemical method has advantages of operational simplicity and high sensitivity, but it consumes oxygen, and the electrodes used are susceptible to damage or poisoned and need to be calibrated and maintained regularly, making it difficult to be applied in long-term measurements. Optical oxygen sensors are mainly based on the quenching of fluorescence or phosphorescence by molecular oxygen [ 11 , 12 , 13 , 14 ], and phosphorescence-based sensors are much more sensitive than fluorescent sensors by principle [ 7 ]. Optical oxygen sensors offer advantages of no oxygen consumption, high detection accuracy, having shorter response time, strong anti-interference ability and convenient to realize sensor miniaturization and are widely applied in the field, including clinical, chemical and environmental monitoring.…”

Section: Introductionmentioning

confidence: 99%

A Phosphorescence Quenching-Based Intelligent Dissolved Oxygen Sensor on an Optofluidic Platform

Wang

Zhu

et al. 2021

Micromachines

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Continuous measurement of dissolved oxygen (DO) is essential for water quality monitoring and biomedical applications. Here, a phosphorescence quenching-based intelligent dissolved oxygen sensor on an optofluidic platform for continuous measurement of dissolved oxygen is presented. A high sensitivity dissolved oxygen-sensing membrane was prepared by coating the phosphorescence indicator of platinum(II) meso-tetrakis(pentafluorophenyl)porphyrin (PtTFPP) on the surface of the microfluidic channels composed of polydimethylsiloxane (PDMS) microstructure arrays. Then, oxygen could be determined by its quenching effect on the phosphorescence, according to Stern–Volmer model. The intelligent sensor abandons complicated optical or electrical design and uses a photomultiplier (PMT) counter in cooperation with a mobile phone application program to measure phosphorescence intensity, so as to realize continuous, intelligent and real-time dissolved oxygen analysis. Owing to the combination of the microfluidic-based highly sensitive oxygen sensing membrane with a reliable phosphorescent intensity detection module, the intelligent sensor achieves a low limit of detection (LOD) of 0.01 mg/L, a high sensitivity of 16.9 and a short response time (22 s). Different natural water samples were successfully analyzed using the intelligent sensor, and results demonstrated that the sensor features a high accuracy. The sensor combines the oxygen sensing mechanism with optofluidics and electronics, providing a miniaturized and intelligent detection platform for practical oxygen analysis in different application fields.

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“…DO concentration is the measurement of molecular oxygen dissolved in water. Likewise, DO measuring technique using polarographic membrane DO sensor involves redox reaction and potential voltage in order to provide an accurate DO value [ 4 , 5 ]. Such sensor comprises two electrodes immersed in an electrolyte into which the O 2 in water sample diffuses through the membrane.…”

Section: Introductionmentioning

confidence: 99%

Electron generation in water induced by magnetic effect and its impact on dissolved oxygen concentration

Yap

Lee

Loo

et al. 2021

Sustain Environ Res

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AbstractpH, oxidation-reduction potential (ORP) and dissolved oxygen (DO) concentration are important parameters in water quality surveillance and treatment. The changes of these parameters are associated with electron density in water. Several techniques including electrolysis and catalysis which require redox reactions and electron exchange are employed to improve these parameters. In recent years, studies reported that magnetic effects can impart considerable changes on the pH, ORP and DO concentration of water. However, the correlation between electron density and magnetic effects on these parameters has yet to be disclosed despite the fact that increased electron density in water could improve water’s reductive properties, heat capacity and hydrogen bonding characteristics. In this study, the magnetic effects on pH, ORP and DO concentration were investigated using different magnets arrangements and water flow rates based on reversed electric motor principle. Results showed that the improvement of pH, ORP and DO concentration from 5.40–5.42 to 5.58–5.62 (+ 3.5%), 392 to 365 mV (− 6.9%), and 7.30 to 7.71 mg L− 1 (+ 5.6%), respectively were achieved using combined variables of non-reversed polarity magnet arrangement (1000–1500 G magnetic strength) and water flow rate of 0.1–0.5 mL s− 1. Such decrement in ORP value also corresponded to 8.0 × 1013 number of electron generation in water. Furthermore, Raman analysis revealed that magnetic effect could strengthen the intermolecular hydrogen bonding of water molecules and favor formation of smaller water clusters. The findings of this study could contribute to potential applications in aquaculture, water quality control and treatment of cancer attributed to free radical induced-oxidative stress.

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Review of Dissolved Oxygen Detection Technology: From Laboratory Analysis to Online Intelligent Detection

Cited by 127 publications

References 184 publications

In-Situ Gold–Ceria Nanoparticles: Superior Optical Fluorescence Quenching Sensor for Dissolved Oxygen

In-Situ Gold–Ceria Nanoparticles: Superior Optical Fluorescence Quenching Sensor for Dissolved Oxygen

A Phosphorescence Quenching-Based Intelligent Dissolved Oxygen Sensor on an Optofluidic Platform

Electron generation in water induced by magnetic effect and its impact on dissolved oxygen concentration

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