Application of functionalized multi-walled carbon nanotubes supporting cuprous oxide and silver oxide composite catalyst on copper substrate for simultaneous detection of vitamin B2, vitamin B6 and ascorbic acid

Puangjan, Apinya; Chaiyasith, Suwan; Taweeporngitgul, Wipawee; Keawtep, Jeerunda

doi:10.1016/j.msec.2017.03.040

Cited by 43 publications

(10 citation statements)

References 67 publications

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“…The GO shows typical bands obtained in the previous study 28 ; band at 3433 cm −1 (O–H stretching), 1635 cm −1 (O–H bending), 1398 cm −1 (COOH) and 1033 cm −1 (C–O stretching) 29 . The GO–C present bands at 3455 cm −1 (O–H stretching), 2931 cm −1 (C–H stretching of aliphatic CH 2 ) 30 , 1637 cm −1 (O–H bending), 1381 cm −1 (COOH) 21 , 11061 cm −1 (Si–O–Si asymmetric stretching vibrations) 31 , 797 cm −1 (bending vibrations of Si–O–Si) 31 . GO–C–MB and GO–C–CV shows shifts in the peaks at 3447 cm −1 , 2927 cm −1 , 1617 cm −1 , 1394 cm −1 (for GO–C–MB) and 3447 cm −1 , 2923 cm −1 , 1591 cm −1 , 1366 cm −1 (for GO–C–CV) which indicated successful interaction between the adsorbent and the dyes.…”

Section: Resultsmentioning

confidence: 99%

Superior adsorption performance of citrate modified graphene oxide as nano material for removal organic and inorganic pollutants from aqueous solution

Abd-Elhamid

Elgoud

Emam

et al. 2022

Sci Rep

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This work addressed one step preparation method to form a novel nano material composite of graphene oxide nanosheet (GO) functionalized with low-cost tri-sodium citrate (C), using, teteraethylorthosilicate (TEOS) as a cross-linker. The prepared composite (GO–C) was characterized using various advanced techniques. Among these techniques, the TGA provided interesting information concerning the functionalization process. Within this process, the (–OH) groups that located at the GO-surface were consumed in the modification process which leads to increase the thermal stability of the resulted composite. Cationic organic methylene blue (MB) and crystal violet (CV), and inorganic copper (Cu2+) and cobalt (Co2+) pollutants were displayed as a model to assess their removal performance by the developed composite (GO–C) from aqueous solution, through batch technique. According to Langmuir isotherm the GO–C present an excellent adsorption capacity for MB (222.22 mg g−1), CV (270.27 mg g−1), Cu2+ (163.4 mg g−1) and Co2+ (145.35 mg g−1) which were more than the adsorption capacities found in literature. Additionally, the regenerated composite presents higher removal ability than the original composite.

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Section: Resultsmentioning

confidence: 99%

Superior adsorption performance of citrate modified graphene oxide as nano material for removal organic and inorganic pollutants from aqueous solution

Abd-Elhamid

Elgoud

Emam

et al. 2022

Sci Rep

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“…Ag2O with carbonic materials as electrode has been used in several applications e.g. as supercapacitors [24], as photocatalyst for the degradation of acidic dyes and bacterial inactivation [25], in zinc-silver batteries [26] and in sensors for the detection of vitamin B2, B6 and ascorbic acid [27]. This paper investigates the efficiency of a silver oxide-based electrode, supported on carbon nanotube, in measuring the degree of bicarbonate reduction.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical reduction of bicarbonate on carbon nanotube-supported silver oxide: An electrochemical impedance spectroscopy study

Hosseini

Kheawhom

Soltani

et al. 2018

Journal of Environmental Chemical Engineering

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Bicarbonate reduction on a silver-oxide (Ag2O)-based electrode was studied via cyclic voltammetry and electrochemical impedance spectroscopy techniques. The effects of electrode composition, electrolyte concentration and the scan rate (10 -250 mV/s) were investigated at a temperature of 27 °C . An optimum mass ratio of 70/30 (Ag2O/CNT) led to a maximum current density of 83 mAcm -2 at -0.43 V (VS Ag/AgCl). At scan rates between 10 to 250 mV/s, a negative shift with a displacement of around 1.032 V was observedindicating the presence of irreversible reduction reactions. The observed irreversibility suggested that the reaction mechanism can be described by both diffusion and adsorption phenomena. The standard heterogeneous rate constant (ko) and the formal redox potential (Eo) were found to be 1.51×10 -4 cm/s and 1.218 V, respectively. The EIS results confirmed the formation of the inductive loops at reduction potentials -a consequence of the adsorption of the generated species. A reduction in charge transfer resistance and a continual drop in the potential from -0.1 down to -1.4 V was also observed. This was accompanied by H2 evolution 2 and bicarbonate production. The calculated pKa value of 10.20 upon the completion of the bicarbonate reduction reactions, confirmed the conversion of bicarbonate to carbonate ions.

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“…Sometimes, the peaks of 3800 to 3200 cm −1 (O-H stretch) and 1700 particles that absorb moisture into the atmosphere or due to certain purification processes [184]. In addition, a band of 2910 to 2940 cm −1 was also detected for CNTs, which is related to the vibration of C-H stretching methylene (CH 2 ) [185]. The FTIR spectra can also suggest surface modification of CNTs.…”

Section: Characterization Of Cntsmentioning

confidence: 99%

Functionalized Carbon Nanotubes (CNTs) for Water and Wastewater Treatment: Preparation to Application

et al. 2021

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As the world human population and industrialization keep growing, the water availability issue has forced scientists, engineers, and legislators of water supply industries to better manage water resources. Pollutant removals from wastewaters are crucial to ensure qualities of available water resources (including natural water bodies or reclaimed waters). Diverse techniques have been developed to deal with water quality concerns. Carbon based nanomaterials, especially carbon nanotubes (CNTs) with their high specific surface area and associated adsorption sites, have drawn a special focus in environmental applications, especially water and wastewater treatment. This critical review summarizes recent developments and adsorption behaviors of CNTs used to remove organics or heavy metal ions from contaminated waters via adsorption and inactivation of biological species associated with CNTs. Foci include CNTs synthesis, purification, and surface modifications or functionalization, followed by their characterization methods and the effect of water chemistry on adsorption capacities and removal mechanisms. Functionalized CNTs have been proven to be promising nanomaterials for the decontamination of waters due to their high adsorption capacity. However, most of the functional CNT applications are limited to lab-scale experiments only. Feasibility of their large-scale/industrial applications with cost-effective ways of synthesis and assessments of their toxicity with better simulating adsorption mechanisms still need to be studied.

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Application of functionalized multi-walled carbon nanotubes supporting cuprous oxide and silver oxide composite catalyst on copper substrate for simultaneous detection of vitamin B2, vitamin B6 and ascorbic acid

Cited by 43 publications

References 67 publications

Superior adsorption performance of citrate modified graphene oxide as nano material for removal organic and inorganic pollutants from aqueous solution

Superior adsorption performance of citrate modified graphene oxide as nano material for removal organic and inorganic pollutants from aqueous solution

Electrochemical reduction of bicarbonate on carbon nanotube-supported silver oxide: An electrochemical impedance spectroscopy study

Functionalized Carbon Nanotubes (CNTs) for Water and Wastewater Treatment: Preparation to Application

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