Electrochemical monitoring of persistent toxic substances using metal oxide and its composite nanomaterials: Design, preparation, and application

Huang, Hong-Qi; Chen, Li; Wang, Shiqi; Kang, Peng; Chen, Xu-Xiu; Guo, Zheng; Huang, Xing‐Jiu

doi:10.1016/j.trac.2019.115636

Cited by 49 publications

(14 citation statements)

References 69 publications

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“…Furthermore, the amount of TiO 2 found in the clay samples had a higher concentration compared to other clay samples from different African countries . The main chemical components (SiO 2 , Al 2 O 3 , Fe 2 O 3 , K 2 O, TiO 2 , and MgO) in the clay samples are efficient oxide used as semiconductors or promoters in nanomaterial composites for environmental application, including wastewater treatment. − …”

Section: Resultsmentioning

confidence: 89%

Geochemical and Physicochemical Characteristics of Clay Materials from Congo with Photocatalytic Activity on 4-Nitrophenol in Aqueous Solutions

et al. 2020

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This study investigated the geochemical and physicochemical characteristics of natural clay collected in the Democratic Republic of Congo. The optical properties of the sample collected in Golf (GOL) were tested in the removal of 4-nitrophenol in aqueous solution. The geochemical analysis depicted that all the samples are plotted within the shale quadrant. Furthermore, the Chemical Index of Alteration (CIA) indicated that the samples are extremely weathered. The particle size distribution ranged from 0.41 to 418.6 μm, while the pore diameters for all the samples were under 100 Å. A flake-like surface morphology was observed in all the samples. SiO2, Al2O3, Fe2O3, K2O, and TiO2 were the major chemical compounds found in all the samples, while the XRD analysis showed the presence of quartz, kaolinite, magnetite, and illite. The presence of metal oxides (i.e., TiO2 and Fe2O3) indicated that these natural clays can be used for photocatalytic oxidation of pollutants. The sample collected in Katuba (KAT) displayed the higher reflectance percentages for the selected wavelengths except at 200 nm. Interestingly, the GOL sample exhibited lower energy band gaps (2.68 and 3.94 eV) necessary for photocatalysis. The untreated GOL clay sample removed 99.13% of 4-nitrophenol from aqueous solution through the photodegradation process. The usage of the untreated GOL clay could be a cost-effective solution in the removal of 4-nitrophenol in wastewater.

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Section: Resultsmentioning

confidence: 89%

Geochemical and Physicochemical Characteristics of Clay Materials from Congo with Photocatalytic Activity on 4-Nitrophenol in Aqueous Solutions

et al. 2020

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“…In this regard, the metal oxide nanomaterials such as TiO 2 , Fe 3 O 4 and NiO with their unique nano-morphology, high catalytic activity, adjustable redox activity and stability, are essential for the wide applications of photocatalysis, semiconductors and electrochemical sensing [13][14][15]. Among these metal oxides, the Fe-based oxides have aroused great interest because of their low cost, minimum toxicity and good stability [16]. However, owing to their drawbacks, including poor sensitivity and narrow detection range, more efforts should be made to improve the hydrazine sensing performances of Fe-based oxides.…”

Section: Introductionmentioning

confidence: 99%

Constructing and electrochemical performance of AuNPs decorated MIL-53 (Fe, Ni) MOFs–derived nanostructures for highly sensitive hydrazine detection

Wang

Zhao

Qian

et al. 2022

Applied Surface Science

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“…It is without any doubt that the properties of nanomaterials, such as; the shape, size, aggregation/agglomeration state, size distribution, crystallinity and defect structure, play a significant role on the electrode’s performance in electrochemical sensors [ 24 , 25 , 26 ]. Tuning/engineering the nanomaterials on the surface of the electrode enables the detection of various toxic trace metals simultaneously or independently [ 27 , 28 ]. In the past few decades, extensive research has been carried out on electrochemical sensors incorporating engineered carbon [ 29 , 30 ], transition metals [ 31 , 32 ], and transition metal oxide/hydroxide [ 33 , 34 ] nanostructured materials as recognition elements, with promising results reported.…”

Section: Introductionmentioning

confidence: 99%

Nanocomposites for Electrochemical Sensors and Their Applications on the Detection of Trace Metals in Environmental Water Samples

Munonde

Nomngongo

2020

Sensors

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The elevated concentrations of various trace metals beyond existing guideline recommendations in water bodies have promoted research on the development of various electrochemical nanosensors for the trace metals’ early detection. Inspired by the exciting physical and chemical properties of nanomaterials, advanced functional nanocomposites with improved sensitivity, sensitivity and stability, amongst other performance parameters, have been synthesized, characterized, and applied on the detection of various trace metals in water matrices. Nanocomposites have been perceived as a solution to address a critical challenge of distinct nanomaterials that are limited by agglomerations, structure stacking leading to aggregations, low conductivity, and limited porous structure for electrolyte access, amongst others. In the past few years, much effort has been dedicated to the development of various nanocomposites such as; electrochemical nanosensors for the detection of trace metals in water matrices. Herein, the recent progress on the development of nanocomposites classified according to their structure as carbon nanocomposites, metallic nanocomposites, and metal oxide/hydroxide nanocomposites is summarized, alongside their application as electrochemical nanosensors for trace metals detection in water matrices. Some perspectives on the development of smart electrochemical nanosensors are also introduced.

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Electrochemical monitoring of persistent toxic substances using metal oxide and its composite nanomaterials: Design, preparation, and application

Cited by 49 publications

References 69 publications

Geochemical and Physicochemical Characteristics of Clay Materials from Congo with Photocatalytic Activity on 4-Nitrophenol in Aqueous Solutions

Geochemical and Physicochemical Characteristics of Clay Materials from Congo with Photocatalytic Activity on 4-Nitrophenol in Aqueous Solutions

Constructing and electrochemical performance of AuNPs decorated MIL-53 (Fe, Ni) MOFs–derived nanostructures for highly sensitive hydrazine detection

Nanocomposites for Electrochemical Sensors and Their Applications on the Detection of Trace Metals in Environmental Water Samples

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