Fabrication of 4-aminophenol sensor based on hydrothermally prepared ZnO/Yb<sub>2</sub>O<sub>3</sub>nanosheets

Rahman, Mohammed M.; Alam, M. M.; Asiri, Abdullah M.; Awual, Md. Rabiul

doi:10.1039/c7nj01623a

Cited by 144 publications

(34 citation statements)

References 68 publications

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“…As a result, the electron transfer rate as well as the conductivity of the working electrode is increased due to the use of Naon, as described in previous reports. [68][69][70][71][72] During the electrochemical detection of 3-CP in PBS, the 3-CP molecules are adsorbed on the surface of the NPs of the modied GCE and by the inuence of the applied potential, they are oxidized to CO 2 , H + , and free electrons. The generated free electrons trigger the high conductivity of the sensing buffer phase and amplied I-V responses are recorded in the Keithley electrometer.…”

Section: Determination Of Mic and Mbcmentioning

confidence: 99%

Enhanced visible light-mediated photocatalysis, antibacterial functions and fabrication of a 3-chlorophenol sensor based on ternary Ag₂O·SrO·CaO

et al. 2020

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A novel multi-metal oxide nanocomposite, Ag 2 O$SrO$CaO, was synthesized by a facile co-precipitation method followed by calcinations. The synthesized nanocomposite was characterized by XRD, FESEM, EDS, TEM, FTIR spectroscopy and photoluminescence (PL) spectroscopy. The composite showed enhanced photocatalytic activity under visible light irradiation and excellent anti-bacterial performance against both Gram-positive and Gram-negative bacteria. Here, the synthesized Ag 2 O$SrO$CaO nanomaterials were deposited on a glassy carbon electrode (GCE) in the form of a thin film to fabricate the desired electrochemical sensor and subjected to I-V analysis of 3-chlorophenol (3-CP) in a phosphate buffer solution (PBS). A calibration curve was plotted from the linear relation of current versus concentration and used to calculate the sensitivity (8.9684 mA mM À1 cm À2 ), linear dynamic range (LDR, 0.1 nM to 0.01 mM) and lower limit of detection (DL, 97.12 AE 4.86 pM). The analytical parameters of the sensor such as response time, reproducibility and long-term stability in the detection of 3-CP were reliable. Finally, it was used to analyze real samples collected from various environmental sources and found to be acceptable.

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Section: Determination Of Mic and Mbcmentioning

confidence: 99%

Enhanced visible light-mediated photocatalysis, antibacterial functions and fabrication of a 3-chlorophenol sensor based on ternary Ag₂O·SrO·CaO

et al. 2020

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“…A similar metal hydroxide formation has been described by previous authors. [25][26][27] Aer that, the nano-crystals of metal hydroxides were subjected to calcination in a muffle furnace at a 500 C temperature for 6 h. In this calcination process, metal hydroxides were oxidized in the presence of atmospheric oxygen and got converted to their oxide form with a higher oxidation number. The corresponding oxidation reaction (eqn (v)) in the muffle furnace is shown below.…”

Section: Solutions Of Nicl 2 $6hmentioning

confidence: 99%

“…This similar tendency of electrochemical responses has been reported previously to measure various toxins. [43][44][45][46] The current data from Fig. 4(c) at an applied potential of +1.5 V have been collected and presented as current vs. concentration of choline in Fig.…”

Section: Morphology and Elemental Analysis Of The As-prepared Npsmentioning

confidence: 99%

Detection of toxic choline based on Mn₂O₃/NiO nanomaterials by an electrochemical method

2019

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“…The existing analytical methods such as fluorescence and Raman spectrophotometry [44][45][46] , photo-electrochemical methods [47][48][49][50] , chromatography 51,52 , chemi-luminescence [53][54][55] , and electrochemical methods 29,[56][57][58][59][60] are used widely to detect the chlorophenol in aqueous medium. Among the chlorophenol detection methods, the electrochemical method has better advantages and the electrochemical method based on current versus potential is becoming more popular to detect directly the toxic chemicals which are environmental unsafe and carcinogenic [61][62][63][64] .…”

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Facile and efficient 3-chlorophenol sensor development based on photolumenescent core-shell CdSe/ZnS quantum dots

Rahman

Karim

Alam

et al. 2020

Sci Rep

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Quantum dots (QDs) are semiconducting inorganic nanoparticles, tiny molecules of 2-10 nm sizes to strength the quantum confinements of electrons. The QDs are good enough to emit light onto electrons for exciting and returning to the ground state. Here, CdSe/ZnS core/shell QDs have been prepared and applied for electrochemical sensor development in this approach. Flat glassy carbon electrode (GCE) was coated with CdSe/ZnS QDs as very thin uniform layer to result of the selective and efficient sensor of 3-CP (3-chlorophenol). The significant analytical parameters were calculated from the calibration plot such as sensitivity (3.6392 µA µM −1 cm −2) and detection limit (26.09 ± 1.30 pM) with CdSe/ZnS/ GCE sensor probe by electrochemical approach. The calibration curve was fitted with the regression coefficient r 2 = 0.9906 in the range of 0.1 nM ∼ 0.1 mM concentration, which denoted as linear dynamic range (LDR). Besides these, it was performed the reproducibility in short response time and successfully validated the fabricated sensor for 3-CP in the real environmental and extracted samples. It is introduced as a noble route to detect the environmental phenolic contaminants using CdSe/ZnS QDs modified sensor by electrochemical method for the safety of healthcare and environmental fields at broad scales. Semiconductor quantum dots (QDs), in particular those of cadmium chalcogenides (CdS, CdSe, CdTe), have received steadily growing attention due to their high potential for various applications, such as sensing 1,2 , biological labeling 3-12 , light-emitting devices (LED) 13-17 , lasers 18,19 , and solar cells 20-22. Recently, the number of interest has been developed in the area of electrochemical sensors and biosensors in which CdSe are employed for the determination of clinical markers 23 and food 24 and environmental pollutants 25,26. CdSe have been using as electrochemical signal tracers to exploit the oxidation potentials of the metal ions forming them. This can also be attributed to some of the characteristics of CdSe, such as a large surface area-to-volume ratio, good interfacial properties with high surface reaction activity, high electron-transfer efficiency, excellent biocompatibility, and feasibility for surface modification 27-30. Moreover, metallic QDs also constitute a feasible option for electrochemical multiplexed assays due to their different stripping peak potentials 31,32. This is particularly true for the development of efficient, reliable, rapid, and cost-affordable analytical procedures for the determination of anthropogenic and natural substances of either organic or mineral nature that have toxic, persistent, and bio-accumulative properties. Due to the prevalent pollution of ground and surface water by chloro-organic chemicals such as chlorophenol derivatives, the public concern has been growing over the several few decades. Because, the chlorophenols (including 3-CP) have high toxicity and able to produce mutagenic, estrogenic and carcinogenic effects in human beings 33-36 and even unsafe for t...

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Fabrication of 4-aminophenol sensor based on hydrothermally prepared ZnO/Yb₂O₃nanosheets

Cited by 144 publications

References 68 publications

Enhanced visible light-mediated photocatalysis, antibacterial functions and fabrication of a 3-chlorophenol sensor based on ternary Ag₂O·SrO·CaO

Enhanced visible light-mediated photocatalysis, antibacterial functions and fabrication of a 3-chlorophenol sensor based on ternary Ag₂O·SrO·CaO

Detection of toxic choline based on Mn₂O₃/NiO nanomaterials by an electrochemical method

Facile and efficient 3-chlorophenol sensor development based on photolumenescent core-shell CdSe/ZnS quantum dots

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Fabrication of 4-aminophenol sensor based on hydrothermally prepared ZnO/Yb2O3nanosheets

Cited by 144 publications

References 68 publications

Enhanced visible light-mediated photocatalysis, antibacterial functions and fabrication of a 3-chlorophenol sensor based on ternary Ag2O·SrO·CaO

Enhanced visible light-mediated photocatalysis, antibacterial functions and fabrication of a 3-chlorophenol sensor based on ternary Ag2O·SrO·CaO

Detection of toxic choline based on Mn2O3/NiO nanomaterials by an electrochemical method

Facile and efficient 3-chlorophenol sensor development based on photolumenescent core-shell CdSe/ZnS quantum dots

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Fabrication of 4-aminophenol sensor based on hydrothermally prepared ZnO/Yb₂O₃nanosheets

Enhanced visible light-mediated photocatalysis, antibacterial functions and fabrication of a 3-chlorophenol sensor based on ternary Ag₂O·SrO·CaO

Enhanced visible light-mediated photocatalysis, antibacterial functions and fabrication of a 3-chlorophenol sensor based on ternary Ag₂O·SrO·CaO

Detection of toxic choline based on Mn₂O₃/NiO nanomaterials by an electrochemical method