Electrocatalytic Oxidation Removal of Phenol from Aqueous Solution with Metal Oxides Doped Carbon Aerogel

Lv, Guifen; Chen, Yuan-Hua; Yang, Tao; Li, Jianguo

doi:10.21577/0103-5053.20170185

Cited by 3 publications

(5 citation statements)

References 10 publications

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“…For instance, pharmaceutical, petrochemical, and food companies use complicated analytical methods to detect these substances as a standard for controlling the quality of the wastewater. The detection of these compounds is necessary due to their high environmental toxicity . The use of low-cost and real-time sensing platforms that allow in situ detection of harmful concentrations of phenolic compounds in water effluents (>70 μM) is highly desirable .…”

Section: Resultsmentioning

confidence: 99%

“…Phenol, which was detected by measuring C μ using the designed DOS of the Cu 2 O/CuO film, was selected as the target as this molecule is considered a model environmental pollutant in aqueous samples. 32,33 ■ EXPERIMENTAL SECTION Chemical Reagents and Solutions. All reagents were of analytical grade and were purchased from Sigma-Aldrich.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The detection of these compounds is necessary due to their high environmental toxicity. 33 The use of low-cost and real-time sensing platforms that allow in situ detection of harmful concentrations of phenolic compounds in water effluents (>70 μM) is highly desirable. 24 Among non-enzymatic approaches for phenol-derived compound sensing, electrocatalytic methods are preferred due to their ability to leverage the efficient catalytic properties of metal oxides.…”

Section: ■ Introductionmentioning

confidence: 99%

“…A schematic of this interface is illustrated in Figure . Phenol, which was detected by measuring C μ using the designed DOS of the Cu 2 O/CuO film, was selected as the target as this molecule is considered a model environmental pollutant in aqueous samples. , …”

Section: Introductionmentioning

confidence: 99%

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Density of States of a Nanoscale Semiconductor Interface as a Transduction Signal for Sensing Molecules

Pinzón

Santos

Bueno

2021

ACS Appl. Electron. Mater.

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Nanoscale inorganic semiconductors (with interfacial thickness <10 nm) have superior stability compared to soft organic compounds and are important for the development of enhanced reagentless sensing devices. As a proof of concept, this study demonstrated that the density of states of a copper oxide mixed valence semiconducting nanoscale film can be suitably designed as a transducer signal for reagentless sensing of phenol.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Density of States of a Nanoscale Semiconductor Interface as a Transduction Signal for Sensing Molecules

Pinzón

Santos

Bueno

2021

ACS Appl. Electron. Mater.

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“…Lv et al (2018) have recently reported similar electrocatalytic oxidation removal of phenol from aqueous solution with metal oxides doped carbon aerogel. 323 Photocatalytic applications on wastewater organic pollutant degradation also have received substantial attention in recent years. 324,325 Next, the effect of methanol solvent (which helped dissolve BPA) was studied by testing a mixture of methanol and KCl.…”

Section: Characterization By Electrochemical Impedance Spectroscopy (...mentioning

confidence: 99%

Selective Detection and Removal of Zinc Oxide Nanoparticles in Contaminated Water

Zhang¹

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Metal oxide nanoparticles (MONPs) are massively produced for various industrial, environmental and biomedical applications due to their high surface reactivity and unique chemical and physical properties. Among all the manufactured MONPs, human exposure to zinc oxide (ZnO) nanoparticles may cause significant health concerns. This leads to a desire for efficient methods for their facile detection in the aqueous environment. In this work, two detection methods and one removal method were developed to selectively detect or remove ZnO nanoparticles in contaminated water with the presence of other MONPs.A detection method based on the fluorescence quenching of meso-tetra(4carboxyphenyl) porphyrin (TCPP) has been developed to treat water samples containing MONPs. Quenching of the TCPP emission intensity at 650 nm provides a Stern-Volmer plot with adequate sensitivity for the detection of 0.15 mg/mL ZnO nanoparticles.Meanwhile, a unique emission peak at 605 nm is observed and can be used for the identification and quantitation of ZnO nanoparticles down to 0.0015 mg/mL. A removal method using 3-aminopropyltriethoxysilane (APTES) has been proved to sediment ZnO nanoparticles in aqueous suspension with TCPP as a color indicator for ZnO. When 2.0% (v) APTES is applied to treat water samples containing ≥ 0.5 mg/mL of ZnO nanoparticles, a web-like sediment adheres onto the glass vial bottom from APTES-ZnO conjugation. A high removal efficiency of over 99% (w) ZnO nanoparticles was attained using APTES.Another detection method has been developed using electroanalytical analysis by firstly drop-casting MONPs on a screen-printed electrode. When phenol is analyzed as a iii chemical probe by cyclic voltammetry (CV), measurement of the reduction current provides adequate sensitivity for the indirect quantitation of 0.1 mg/mL ZnO nanoparticles.Both the oxidation peak and charge storage capacity measured from the cyclic voltammogram are proportional to the ZnO nanoparticle concentration and can afford a better detection limit of 0.01 mg/mL. Overall, the above methods are labour and cost effective and can afford high selectivity towards ZnO detection or removal in the presence of other MONPs.Additionally, the electrochemical analysis method and the APTES sedimentation method can differentiate ZnO nanoparticles from Zn 2+ and zinc peroxide (ZnO2) nanoparticles.iv PrefaceThis preface provides full bibliographical details for each article included in this thesis, as well as whether the article is reproduced in whole or in part. Permission was obtained from the publishers to include the articles in the thesis. When citing material from this thesis, please cite the article relevant to the chapter, if the chapter is based on a publication.Pursuant to the Integrated Thesis policy of Carleton University, the "supervisor" (Edward P.C. Lai) and the "student" (Wenyu Zhang) confirm that the student was fully involved in setting up and conducting the research, obtaining data and analyzing results, as well as preparing and writing the material pres...

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Enhanced Electrodesorption Performance via Cathode Potential Extension during Capacitive Deionization

Wang

Jin

et al. 2022

Applied Sciences

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Complete desorption of contaminants from electrode materials is required for the efficient utilization and long service life of capacitive deionization (CDI) but remains a major challenge. The electrodesorption capacity of CDI in the conventional electrode configuration is limited by the narrow electrochemical stability window of water, which lowers the operating potential to approximately 1.2 V. Here, we report a graphite anode–titanium cathode electrode configuration that extends the cathode potential to −1.7 V and provides an excellent (100%) electrodesorption performance, which is maintained after five cycles. The improvement of the cathode potential depends on the redox property of the electrode. The stronger the oxidizability of the anode and reducibility of the cathode, the wider the cathode potential. The complete desorption potential of SO42− predicted by theoretical electrochemistry was the foundation for optimizing the electrode configuration. The desorption efficiency of Cl− depended on the ionic strength and was negligibly affected by circulating velocities above 112 mL min−1. This work can direct the design optimizations of CDI devices, especially for reactors undergoing chemisorption during the electrosorption process.

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Electrocatalytic Oxidation Removal of Phenol from Aqueous Solution with Metal Oxides Doped Carbon Aerogel

Cited by 3 publications

References 10 publications

Density of States of a Nanoscale Semiconductor Interface as a Transduction Signal for Sensing Molecules

Density of States of a Nanoscale Semiconductor Interface as a Transduction Signal for Sensing Molecules

Selective Detection and Removal of Zinc Oxide Nanoparticles in Contaminated Water

Enhanced Electrodesorption Performance via Cathode Potential Extension during Capacitive Deionization

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