The role of magnetic nanomaterials in miniaturized sample preparation techniques

Silva, Amandha Kaiser da; Ricci, Thiago Gomes; Toffoli, Ana Lúcia de; Maciel, Edvaldo Vasconcelos Soares; Nazário, Carlos Eduardo Domingues; Lanças, Fernando Mauro

doi:10.1016/b978-0-12-819763-9.00004-0

Cited by 11 publications

(7 citation statements)

References 54 publications

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“…Some synthetic approaches have relied on preparing high-quality and highly crystalline precursors using hydrothermal methods, followed by conventional nitridation in an NH 3 atmosphere. ,,,,, In general, hydrothermal synthesis involves crystallizing materials in a sealed container at moderate temperatures (130–250 °C) and pressures (0.3–4 MPa) . Specifically in the transition metal nitride field, certain studies have used the hydrothermal method to produce nanostructured transition metal nitrides since one can easily control the nano-morphologies and compositions of the precursors for transition metal nitrides by using the hydrothermal method, and the subsequent nitridation process can somewhat maintain the nano-morphologies of the precursors.…”

Section: Transition Metal Pnictidesmentioning

confidence: 99%

“…Unlike hydrothermal methods, solvothermal methods rely on nonaqueous solvents to perform the crystallization process at moderate temperatures (i.e., above the boiling point) and high pressure. − Notably, solvothermal synthesis is widely utilized to synthesize high-quality organic-inorganic hybrid materials with high crystallinity and metastable phases. Moreover, certain starting materials can only be dissolved in nonaqueous solvents, which expands the applicability of the resulting materials. , In the transition metal nitride field, certain studies have also used solvothermal synthesis to prepare the precursors for transition metal nitrides. For example, Chang et al .…”

Section: Transition Metal Pnictidesmentioning

confidence: 99%

“…312,329,338,340,344,355 In general, hydrothermal synthesis involves crystallizing materials in a sealed container at moderate temperatures (130−250 °C) and pressures (0.3−4 MPa). 396 Specifically in the transition metal nitride field, certain studies have used the hydrothermal method to produce nanostructured transition metal nitrides since one can easily control the nano-morphologies and compositions of the precursors for transition metal nitrides by using the hydrothermal method, and the subsequent nitridation process can somewhat maintain the nano-morphologies of the precursors. For example, Zhang et al employed the gas-solid nitridation to directly grow TiN, TiN@NiO, and TiN@Ni 3 N nanowire arrays on Ti foil.…”

Section: Transition Metal Pnictidesmentioning

confidence: 99%

“…Moreover, certain starting materials can only be dissolved in nonaqueous solvents, which expands the applicability of the resulting materials. 396,399 In the transition metal nitride field, certain studies have also used solvothermal synthesis to prepare the precursors for transition metal nitrides. For example, Chang et al anchored NiMoO 4 • xH 2 O nanowires to Ni foam using a solvothermal reaction with dodecyl trimethylammonium bromide (DTAB) surfactant, followed by conventional nitridation with ammonia (Figure ).…”

Section: Transition Metal Pnictidesmentioning

confidence: 99%

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A Review of Transition Metal Boride, Carbide, Pnictide, and Chalcogenide Water Oxidation Electrocatalysts

Kawashima,

Márquez,

Smith

et al. 2023

Chem. Rev.

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Transition metal borides, carbides, pnictides, and chalcogenides (X-ides) have emerged as a class of materials for the oxygen evolution reaction (OER). Because of their high earth abundance, electrical conductivity, and OER performance, these electrocatalysts have the potential to enable the practical application of green energy conversion and storage. Under OER potentials, X-ide electrocatalysts demonstrate various degrees of oxidation resistance due to their differences in chemical composition, crystal structure, and morphology. Depending on their resistance to oxidation, these catalysts will fall into one of three post-OER electrocatalyst categories: fully oxidized oxide/(oxy)hydroxide material, partially oxidized core@shell structure, and unoxidized material. In the past ten years (from 2013 to 2022), over 890 peer-reviewed research papers have focused on X-ide OER electrocatalysts. Previous review papers have provided limited conclusions and have omitted the significance of “catalytically active sites/species/phases” in X-ide OER electrocatalysts. In this review, a comprehensive summary of (i) experimental parameters (e.g., substrates, electrocatalyst loading amounts, geometric overpotentials, Tafel slopes, etc.) and (ii) electrochemical stability tests and post-analyses in X-ide OER electrocatalyst publications from 2013 to 2022 is provided. Both mono and polyanion X-ides are discussed and classified with respect to their material transformation during the OER. Special analytical techniques employed to study X-ide reconstruction are also evaluated. Additionally, future challenges and questions yet to be answered are provided in each section. This review aims to provide researchers with a toolkit to approach X-ide OER electrocatalyst research and to showcase necessary avenues for future investigation.

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Section: Transition Metal Pnictidesmentioning

confidence: 99%

Section: Transition Metal Pnictidesmentioning

confidence: 99%

Section: Transition Metal Pnictidesmentioning

confidence: 99%

Section: Transition Metal Pnictidesmentioning

confidence: 99%

See 2 more Smart Citations

A Review of Transition Metal Boride, Carbide, Pnictide, and Chalcogenide Water Oxidation Electrocatalysts

Kawashima,

Márquez,

Smith

et al. 2023

Chem. Rev.

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“…Usually, the precursors are Fe (cup)3, (cup = N-nitrosophenylhydroxylamine), Fe (CO)5, Fe (acac)3 (aca = acetylacetonate) (Figure 4), iron oleate, and Fe (C5H5)2 (ferrocene), This process is carried out under an inert atmosphere of nitrogen and argon (Figure 4). Usually, the precursors are Fe (cup)3, (cup = N-nitrosophenylhydroxylamine), Fe (CO)5, Fe (acac)3 (aca = acetylacetonate) (Figure 4), iron oleate, and Fe (C 5 H 5 ) 2 (ferrocene), solubilized in high boiling organic solvents in the presence of surfactants (oleic acid, fatty acids, 1octadecene, oleylamine, and hexadecyl amine) [76]. Synthesis conditions (such as the ratio of organometallic precursors, temperature, time, and other parameters) play an essential role in the size and morphology of the particles.…”

Section: High-temperature Decomposition Of Organic Precursorsmentioning

confidence: 99%

Polymeric Composite of Magnetite Iron Oxide Nanoparticles and Their Application in Biomedicine: A Review

et al. 2022

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A broad spectrum of nanomaterials has been investigated for multiple purposes in recent years. Some of these studied materials are magnetics nanoparticles (MNPs). Iron oxide nanoparticles (IONPs) and superparamagnetic iron oxide nanoparticles (SPIONs) are MNPs that have received extensive attention because of their physicochemical and magnetic properties and their ease of combination with organic or inorganic compounds. Furthermore, the arresting of these MNPs into a cross-linked matrix known as hydrogel has attracted significant interest in the biomedical field. Commonly, MNPs act as a reinforcing material for the polymer matrix. In the present review, several methods, such as co-precipitation, polyol, hydrothermal, microemulsion, and sol-gel methods, are reported to synthesize magnetite nanoparticles with controllable physical and chemical properties that suit the required application. Due to the potential of magnetite-based nanocomposites, specifically in hydrogels, processing methods, including physical blending, in situ precipitation, and grafting methods, are introduced. Moreover, the most common characterization techniques employed to study MNPs and magnetic gel are discussed.

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Exploring the Contribution of Intelligent Nanomaterials in Gas Sensing

Onyinye Okechukwu,

Olayiwola Idris,

Umukoro

et al. 2024

ChemistrySelect

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Gas sensors are crucial in various industries like chemicals, food processing, pharmaceuticals, health monitoring through breath analysis, as well as in household and environmental monitoring to ensure human safety. Chemo‐resistive gas sensors based on metal oxides convert gas information into electrical signals by interacting with adsorption and desorption processes. For metal oxide semiconductor gas sensors, sensitivity and selectivity enhancements are achieved through doping, functionalization, composite formations, heterojunction creation, and morphological adjustments. The formation of heterojunctions notably boosts the efficacy of the sensing material, leveraging synergistic effects to reinforce adsorption rates, catalytic activity acceleration, and the depletion interface for electrons and holes. Over the past few decades, nanomaterials have played a critical role in gas sensing applications. They have enabled the detection of a wide array of harmful and polluting gases, as well as volatile organic compounds serving as disease biomarkers. Additionally, incorporating heterostructure nanomaterials into heterojunctions significantly impacts sensing performance and detection speed. This review discussed various types of gas sensing devices, categorizing them based on the sensing elements employed, each possessing its own set of unique advantages and disadvantages. Nevertheless, the review underscored the importance of several key parameters and factors that influence the performance of gas sensors. Additionally, recent advancements in the utilization of nanomaterial composites for gas sensor applications, particularly in the detection of gases such as ammonia, hydrogen sulphide, and sulphur dioxide vapours, were discussed. Furthermore, the review highlights recent research endeavours and fundamental parameters, including sensitivity, detection limits, selectivity, response times, and recovery times.

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The role of magnetic nanomaterials in miniaturized sample preparation techniques

Cited by 11 publications

References 54 publications

A Review of Transition Metal Boride, Carbide, Pnictide, and Chalcogenide Water Oxidation Electrocatalysts

A Review of Transition Metal Boride, Carbide, Pnictide, and Chalcogenide Water Oxidation Electrocatalysts

Polymeric Composite of Magnetite Iron Oxide Nanoparticles and Their Application in Biomedicine: A Review

Exploring the Contribution of Intelligent Nanomaterials in Gas Sensing

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