A facile colorimetric method for highly sensitive ascorbic acid detection by using CoOOH nanosheets

Nie, Qiuyu; Cai, Qiaoling; Xu, Hualong; Qiao, Zhun; Li, Zhaohui

doi:10.1039/c8ay00841h

Cited by 21 publications

(10 citation statements)

References 24 publications

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“…FTIR of Co@100 reveals a very broad high intensity peak at (v 1 ) 551 cm −1 and a sharp lower intensity peak at (v 2 ) 659 cm −1 (Figure 4B and Figure S2). Notably, v 1 is likely a combination of vibration modes for Co-O in Co 3 O 4 spinel (Co 3+ ), in CoO(OH), and in Co(OH) 2 [72][73][74][75][76]. The sharp lower intensity v 2 is attributed to the vibration of Co-O in Co 3 O 4 spinel (Co 2+ ), which increases in intensity as calcination temperature increases (Co@350 and Co@600).…”

Section: Catalyst Characterizationmentioning

confidence: 99%

A Combined Mechanochemical and Calcination Route to Mixed Cobalt Oxides for the Selective Catalytic Reduction of Nitrophenols

et al. 2019

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Para-, or 4-nitrophenol, and related nitroaromatics are broadly used compounds in industrial processes and as a result are among the most common anthropogenic pollutants in aqueous industrial effluent; this requires development of practical remediation strategies. Their catalytic reduction to the less toxic and synthetically desirable aminophenols is one strategy. However, to date, the majority of work focuses on catalysts based on precisely tailored, and often noble metal-based nanoparticles. The cost of such systems hampers practical, larger scale application. We report a facile route to bulk cobalt oxide-based materials, via a combined mechanochemical and calcination approach. Vibratory ball milling of CoCl2(H2O)6 with KOH, and subsequent calcination afforded three cobalt oxide-based materials with different combinations of CoO(OH), Co(OH)2, and Co3O4 with different crystallite domains/sizes and surface areas; Co@100, Co@350 and Co@600 (Co@###; # = calcination temp). All three prove active for the catalytic reduction of 4-nitrophenol and related aminonitrophenols. In the case of 4-nitrophenol, Co@350 proved to be the most active catalyst, therein its retention of activity over prolonged exposure to air, moisture, and reducing environments, and applicability in flow processes is demonstrated.

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Section: Catalyst Characterizationmentioning

confidence: 99%

A Combined Mechanochemical and Calcination Route to Mixed Cobalt Oxides for the Selective Catalytic Reduction of Nitrophenols

et al. 2019

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“…Several nanomaterials have been developed for AA detection recently. , However, most of the nanomaterials in these reported works were inevitably fabricated via complicated, toxic, and time-consuming routes. Compared to these methods, the method using CoOOH nanoflakes is supposed to solve this problem well, and it also had been intensively explored for AA detection. − In the CoOOH nanoflake detection system for ascorbic acid, CoOOH nanoflakes can directly oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to oxTMB, leading to a color change, i.e., from colorless to blue. However, in the presence of AA, the CoOOH nanoflakes are reduced and decomposed by AA, reducing the oxidation degree of oxTMB, thereby inhibiting the color intensity of the system.…”

Section: Introductionmentioning

confidence: 99%

Cobalt Oxyhydroxide Nanoflakes/Cellulose Composite Membranes with Enhanced Detection of Ascorbic Acid

Jiang

Yang

Jiang

et al. 2021

ACS Appl. Polym. Mater.

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Compared with complex biochemical detection systems, the development of a simple test strip is of great significance for outdoor real-time detection and analysis. In this study, cobalt oxyhydroxide (CoOOH) nanoflakes were synthesized by a simple redox method and well dispersed in a high-purity cellulose matrix to obtain CoOOH nanoflakes/cellulose composite membranes (CCMs). The prepared CCM exhibits a competitive detection performance for ascorbic acid (AA) compared to a pure CoOOH nanoflake solution. The dispersion mechanism of CoOOH nanoflakes into cellulose was well analyzed and discussed with the help of various experiments and characterizations, such as scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Additionally, the detection behavior of CCMs to AA was evaluated on a standard AA solution. The principle of AA detection is that CoOOH nanoflakes can react with a 3,3′,5,5′-tetramethylbenzidine (TMB) solution to produce a blue color, but the color intensity can be inhibited in the presence of AA. Based on this, the detection behavior was deeply investigated including real samples and in the presence of other potential interferences also. This work provided a simple, low-cost, and fast platform for AA detection in the field of food safety.

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“…Compared to these methods, CoOOH nano akes can be used to solve this problem well, and it also has been intensively explored for AA detection. (Fang et al 2019;Ji et al 2018;Nie et al 2018) As an amphoteric hydroxide, CoOOH nano akes can be easily synthesized by a simple redox method. (Ji et al 2018) Nevertheless, CoOOH nano akes synthesized by redox method have a poor colorimetric effect for AA detection because the inherent high surface energy of nano akes can easily lead to the aggregation of CoOOH nano akes.…”

Section: Introductionmentioning

confidence: 99%

Hexagonal CoOOH Nanoflakes Synthesized From Three-Dimensional Cellulose Membrane Matrix With Enhanced Detection of Ascorbic Acid

Xia

Yang

Jiang

et al. 2021

Preprint

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In this work, cobalt oxyhydroxide (CoOOH) nanoflakes/cellulose composite membranes (CCM) were fabricated by a simple one-step method and green route without further treatment. The CoOOH nanoflakes were synthesized in the high-purity cellulose membranes (CM) matrix that expected to enhance its detection performance of ascorbic acid in comparison to the traditional paper-based sensors that were made of commercially available filter paper. The structure and properties of CM and CCM were characterized by SEM, EDS, FT-IR, XRD and XPS, etc. The combination mechanism between nanoflakes and cellulose was well analyzed and discussed by various characterizations and experiments. When the CCM was immersed into the ascorbic acid (AA) solution, the color changing from colorless to blue was observed only in 2 min. Furthermore, the CCM can be used for AA determination in real samples.

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A facile colorimetric method for highly sensitive ascorbic acid detection by using CoOOH nanosheets

Abstract: A simple and highly sensitive colorimetric assay was developed to detect ascorbic acid by using CoOOH nanosheets.

Cited by 21 publications

References 24 publications

A Combined Mechanochemical and Calcination Route to Mixed Cobalt Oxides for the Selective Catalytic Reduction of Nitrophenols

A Combined Mechanochemical and Calcination Route to Mixed Cobalt Oxides for the Selective Catalytic Reduction of Nitrophenols

Cobalt Oxyhydroxide Nanoflakes/Cellulose Composite Membranes with Enhanced Detection of Ascorbic Acid

Hexagonal CoOOH Nanoflakes Synthesized From Three-Dimensional Cellulose Membrane Matrix With Enhanced Detection of Ascorbic Acid

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