Highly efficient and stable catalytic reactivities of iron(-oxide) incorporated carbide nanofiber composite for environmental and bio-medical application

An, Ha‐Rim; Bae, Soo An; Kim, Chang Yeon; Son, Byoungchul; Park, Ji-In; Kim, Hye‐Ran; Lee, Moonsang; Yang, Kyeong Eun; Lee, Sang Moon; Kim, Soo Hyeon; Jeong, Youn-Joong; Jang, Yujin; Jeong, Beomgyun; Lee, Hyun Uk

doi:10.1016/j.jmrt.2021.10.127

Cited by 13 publications

(2 citation statements)

References 55 publications

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“…Since no secondary phase forms in either sHEO or rHEO NFs [29] (i.e., in the absence of carbon), it is argued that some metals react with carbon (preserved by the polymer stabilization) and form carbide during carbonization [46]. Indeed, the formation of metal carbides in electrospun composite NFs obtained from a spinnable solution containing PAN and metal salts, as in this case, has been also reported by other groups [46][47][48]. The similarity of the 2θ-angular positions of the extra-peaks detected in C/CrMnFeCoNi-and C/MgCoNiCuZn-HEO NFs hints at the possible involvement of Co and/or Ni.…”

Section: Phase Of the Oxidesupporting

confidence: 77%

Evaluation of the Specific Capacitance of High-Entropy Oxide-Based Electrode Materials in View of Their Use for Water Desalination via Capacitive Method

et al. 2023

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Water pollution and scarcity are serious concerns for the growing world population. To meet the ever-pressing demand of fresh water, a variety of desalting techniques of seawater have been developed. Due to its environmental friendliness, high efficiency, easy regeneration of the electrodes, ambient operating pressure, and low operating potential suitable for the use in remote areas, the capacitive deionization (CDI) method is one of the most sustainable among them. This work focuses on the preparation of high-entropy oxides (HEOs) and carbon/HEO composites and the evaluation of their specific capacitance in view of their possible use as CDI electrode materials. CrMnFeCoNi-HEO, having spinel structure (sHEO), is obtained in the form of nanoparticles (NPs) and nanofibers (NFs) by the sol–gel method and electrospinning, respectively. Composite NFs with embedded sHEO NPs or MgCoNiCuZn-HEO NPs with rock-salt structure (rHEO) are also produced. In the 5–100 mV s−1 scan rate range, the specific capacitance improves in the order C/rHEO NFs (8–32 F g−1) ≅ sHEO NPs (9–32 F g−1) < sHEO NFs (8–43 F g−1) < C/sHEO NFs (12–66 F g−1). The highest capacitance is obtained when the beneficial contributions of the carbon matrix and smaller-sized HEO NPs are synergistically coupled.

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Section: Phase Of the Oxidesupporting

confidence: 77%

Evaluation of the Specific Capacitance of High-Entropy Oxide-Based Electrode Materials in View of Their Use for Water Desalination via Capacitive Method

et al. 2023

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“…Superparamagnetic iron oxide nanoparticles (SPIONs) have recently garnered great attention in biomedical applications including magnetic resonance imaging, hyperthermia, drug delivery nanocarriers, and biosensing, owing to their inherent properties, which include good chemical stability, lower toxicity, high magnetic susceptibility, and highly saturated magnetization. − Furthermore, SPIONs have a high capacity for producing reactive oxygen species (ROS) through the Haber–Weiss and Fenton-like reactions, which may disturb cellular redox equilibrium, cause cell cycle arrest, and impede tumor tissue development. , Combining Dox with SPION nanocarriers might be a strategy for increasing oxidative stress inside cancer cells and hence cell toxicity. SPIONs are typically produced in a spherical form with a diameter of less than 20 nm to ensure adequate transport within the body.…”

Section: Introductionmentioning

confidence: 99%

Targeted Chemotherapy Based on Amplifying the Reactive Oxygen Species of Doxorubicin-Loaded Polyaspartamide-Encapsulated Iron Oxide Nanoparticles

Nguyễn

Kim

Ryu

et al. 2022

ACS Appl. Nano Mater.

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We report an innovative reactive oxygen species (ROS)-based chemotherapy mechanism using doxorubicin (Dox)-loaded polyaspartamide (PA)-encapsulated superparamagnetic iron oxide nanoparticles (SPIONs). PA encapsulates SPIONs (PA-SPIONs) to create biocompatible nanocarriers with an average diameter of 152 nm. PA is conjugated with Dox, biotin, and 3-amino-1,2,4-triazole (3AT) to perform different functions in chemotherapy. As a result, 3AT inhibits endogenous catalase, biotin improves cancer cell targeting and uptake, and Dox, in conjunction with iron ions, stimulates exogenous ROS production above the lethal threshold of cancer cells. The fluorescence signal results from Dox confirm that PA-SPIONs have a great affinity for 4T1 cancer cells. Because of the pH-sensitive cleavage function of the hydrazone bond, approximately 80% of Dox is released in the cancer cell environment (pH ∼ 5). In in vitro cytotoxicity, PA-SPIONs are highly cytotoxic to 4T1 cells, with less than 50% cell viability. The 2′,7′-dichlorofluorescein diacetate test demonstrates the ROS production of the nanocarriers, while the cell apoptosis assay confirms the cell death mechanism. In an in vivo experiment, PA-SPIONs inhibited the tumor growth rate, with a tumor volume 4.5 times lower than that of the control after 28 days. The individual roles of Dox and 3AT in tumor volume growth inhibition are also demonstrated. PA-SPIONs are demonstrated for biosafety and blood compatibility. Because the nanocarriers demonstrate the high efficacy of 4T1 cancer cell treatment, it likely opens the door for future advancements in cancer-targeted chemotherapy.

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Quantum Dots on a String: In Situ Observation of Branching and Reinforcement Mechanism of Electrospun Fibers

Lou,

Dolmetsch,

Aguiar

et al. 2024

Small

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Immobilization of quantum dots (QDs) on fiber surfaces has emerged as a robust approach for preserving their functional characteristics while mitigating aggregation and instability issues. Despite the advancement, understanding the impacts of QDs on jet‐fiber evolution during electrospinning, QDs‐fiber interface, and composites functional behavior remains a knowledge gap. The study adopts a high‐speed imaging methodology to capture the immobilization effects on the QDs‐fiber matrix. In situ observations reveal irregular triangular branches within the QDs‐fiber matrix, exhibiting distinctive rotations within a rapid timeframe of 0.00667 ms. The influence of FeQDs on Taylor cone dynamics and subsequent fiber branching velocities is elucidated. Synthesis phenomena are correlated with QD‐fiber's morphology, crystallinity, and functional properties. PAN‐FeQDs composite fibers substantially reduced (50–70%) nano‐fibrillar length and width while their diameter expanded by 17%. A 30% enhancement in elastic modulus and reduction in adhesion force for PAN‐FeQDs fibers is observed. These changes are attributed to chemical and physical intertwining between the FeQDs and the polymer matrix, bolstered by the shifts in the position of C≡N and C═C bonds. This study provides valuable insights into the quantum dot‐fiber composites by comprehensively integrating and bridging jet‐fiber transformation, fiber structure, nanomechanics, and surface chemistry.

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Highly efficient and stable catalytic reactivities of iron(-oxide) incorporated carbide nanofiber composite for environmental and bio-medical application

Cited by 13 publications

References 55 publications

Evaluation of the Specific Capacitance of High-Entropy Oxide-Based Electrode Materials in View of Their Use for Water Desalination via Capacitive Method

Evaluation of the Specific Capacitance of High-Entropy Oxide-Based Electrode Materials in View of Their Use for Water Desalination via Capacitive Method

Targeted Chemotherapy Based on Amplifying the Reactive Oxygen Species of Doxorubicin-Loaded Polyaspartamide-Encapsulated Iron Oxide Nanoparticles

Quantum Dots on a String: In Situ Observation of Branching and Reinforcement Mechanism of Electrospun Fibers

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