Polymorphic cerium-based Prussian blue derivatives with in situ growing CNT/Co heterojunctions for enhanced microwave absorption via polarization and magnetization

Zhou, Jixi; Huang, Xinmeng; Lan, Di; Cheng, Yuhang; Xue, Fengyi; Jia, Chenyu; Wu, Guanglei; Jia, Zirui

doi:10.1007/s12274-023-6216-7

Cited by 47 publications

(1 citation statement)

References 86 publications

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“…The ATR-FTIR spectra of samples of DOX-loaded and -empty pSiNPs were also acquired to observe the surface functionality (Figure d). The infrared spectrum of pSiNPs displayed four characteristic bands associated with the silanol (Si–OHs) functionality: ν(O–H) peak at 3550–3200 cm –1 , ν(Si–H) peak at 2104 nm –1 , δ(O–H) peak at 1632 cm –1 , and ν(Si–O) peak at 1064 nm –1 . ,, On the other hand, ν(CO) peak at 1719 cm –1 and ν(CC) peak at 1615 and 1412 cm –1 of DOX were additionally observed in DOX-loaded pSiNPs . TEM images indicated that the homogeneous size and the porous nanostructure of both types of drug-loaded pSiNPs, DOX@SB-pSiNPs and DOX@AC-pSiNPs, were preserved with no significant pore wall collapse during the drug loading process (Figure e).…”

Section: Resultsmentioning

confidence: 99%

Adaptive Cavitation Ultrasonication for Large-Scale Preparation of Porous Silicon Nanoparticles

Lee,

Um,

Sailor

et al. 2024

ACS Appl. Nano Mater.

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Porous silicon nanoparticles (pSiNPs) are of increased interest for use in drug delivery systems, as catalysts, and as biomedical imaging agents. The most common synthesis of pSiNPs involves electrochemical anodization of a silicon wafer, followed by ultrasonic fracture of the resulting mesoporous film to form well-defined nanoparticles. A major source of loss in this process is the ultrasonic fracture step. This work presents a method of synthesizing gram-scale quantities of pSiNPs with high yield and high reproducibility using an ultrasonic bath equipped with a sample rotation stage and a refrigerator (4 °C) and a higher ultrasound frequency with power delivered in a pulsed modality compared with the static ultrasound “cleaning baths” commonly used for this purpose. The optimal processing conditions are determined by adjusting the pSi film mass, solvent volume, and iteration number of on/off cycles used in sonication. The approach provides pSiNPs with a narrow size distribution (∼170 nm, PDI = 0.149), higher yields (59%), and an approximately 12-fold reduction in the total processing time, allowing the preparation of gram-scale quantities of pSiNPs from single-crystal silicon wafers with high reproducibility in a single 24 h process. The performance of the produced pSiNPs is validated in a drug delivery application in which loading and release of the anthracycline drug doxorubicin are compared with pSiNPs prepared in a conventional cleaning bath ultrasonicator.

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Section: Resultsmentioning

confidence: 99%

Adaptive Cavitation Ultrasonication for Large-Scale Preparation of Porous Silicon Nanoparticles

Lee,

Um,

Sailor

et al. 2024

ACS Appl. Nano Mater.

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Sulfur Modified Carbon‐Based Single‐Atom Catalysts for Electrocatalytic Reactions

Li,

Wei,

Sun

et al. 2024

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Efficient and sustainable energy development is a powerful tool for addressing the energy and environmental crises. Single‐atom catalysts (SACs) have received high attention for their extremely high atom utilization efficiency and excellent catalytic activity, and have broad application prospects in energy development and chemical production. M‐N4 is an active center model with clear catalytic activity, but its catalytic properties such as catalytic activity, selectivity, and durability need to be further improved. Adjustment of the coordination environment of the central metal by incorporating heteroatoms (e.g., sulfur) is an effective and feasible modification method. This paper describes the precise synthetic methods for introducing sulfur atoms into M‐N4 and controlling whether they are directly coordinated with the central metal to form a specific coordination configuration, the application of sulfur‐doped carbon‐based single‐atom catalysts in electrocatalytic reactions such as ORR, CO2RR, HER, OER, and other electrocatalytic reaction are systematically reviewed. Meanwhile, the effect of the tuning of the electronic structure and ligand configuration parameters of the active center due to doped sulfur atoms with the improvement of catalytic performance is introduced by combining different characterization and testing methods. Finally, several opinions on development of sulfur‐doped carbon‐based SACs are put forward.

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Hierarchical Magnetic Carbon Nanoflowers for Ultra‐Efficient Electromagnetic Wave Absorption

Wei,

Liu,

Wang

et al. 2024

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Porous carbon nanomaterials are widely applied in the electromagnetic wave absorption (EMWA) field. Among them, an emerging flower‐like carbon nanomaterial, termed carbon nanoflowers (CNFs), has attracted tremendous research attention due to their unique hierarchical flower‐like structure. However, the design of flower‐like carbon nanomaterials with different magnetic cores for EMWA has rarely been reported. Herein, a general template method is proposed to achieve a set of high‐quality magnetic CNFs, namely Co@Void@CNFs, CoNi@CNFs, and Ni@CNFs. The prepared magnetic CNFs have highly accessible surface area and internal space, rich heteroatom content, multi‐scale pore system, and uniform and highly dispersed magnetic nanoparticles, as a result, deliver superior EMWA performance. Specifically, when the thickness is 2.6 mm, the Co@Void@CNFs exhibit a maximum refection loss (RLmax) of −56.6 dB and an effective absorption bandwidth (EAB) from 8.0 to 12.1 GHz covering the whole X band. The CoNi@CNFs have an RLmax of up to −57.6 dB and a wide EAB of 5.6 GHz at just 1.9 mm. For the Ni@CNFs, possess an ultra‐broad EAB of 6.1 GHz, covering the entire Ku band at 2.0 mm. Overall, the hierarchical magnetic carbon nanoflowers proposed here offer new insights toward realizing multifunctional integrated carbon nanomaterials for EMWA.

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Polymorphic cerium-based Prussian blue derivatives with in situ growing CNT/Co heterojunctions for enhanced microwave absorption via polarization and magnetization

Cited by 47 publications

References 86 publications

Adaptive Cavitation Ultrasonication for Large-Scale Preparation of Porous Silicon Nanoparticles

Adaptive Cavitation Ultrasonication for Large-Scale Preparation of Porous Silicon Nanoparticles

Sulfur Modified Carbon‐Based Single‐Atom Catalysts for Electrocatalytic Reactions

Hierarchical Magnetic Carbon Nanoflowers for Ultra‐Efficient Electromagnetic Wave Absorption

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