Multifunctional Electromagnetic Responsive Porous Materials Synthesized by Freeze Casting: Principles, Progress, and Prospects

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 12, 2024

Abstract Freeze casting is a solidification technique utilized in the fabrication of porous materials. However, freeze process quite complex, and significant challenges remain precisely controlling pore size shape structures. This study aims to investigate customization multifunctional electromagnetic wave (EMW) absorbers with 3D structures via casting. review initially presents fundamental principles underlying examines correlation between internal external factors during preparation porosity. The emerging trends constructing novel intricate macroscopic through are subsequently outlined. Furthermore, this focuses on composites various microstructures low‐dimensional building blocks, their EMW response properties. By regulating influencing mechanisms casting, absorption materials exhibit outstanding advantages such as property manipulation, controllable structure, high porosity, specific surface area, lightweight, flexibility. These features broaden applications shielding, mechanical property, radar stealth, thermal insulation fire prevention, flexible sensors, antifreeze ability, etc. In addition, we discuss prospects high‐performance using techniques.

Language: Английский

---

Assembling halloysite nanotubes in nickel foam with silica fibers as scaffold for efficiently encapsulating phase change materials towards solar-thermal-electric energy conversion and management

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161681 - 161681

Published: March 1, 2025

Language: Английский

---

Encapsulating phase change materials into melamine formaldehyde sponge assembled with polypyrrole modified halloysite nanotube for effective solar-thermal energy storage and solar-thermal-electric conversion

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 682, P. 423 - 435

Published: Nov. 30, 2024

Language: Английский

---

Constructing 2D/2D heterostructure of ZnIn2S4 nanosheets on cobalt doped MoS2 for enhanced photocatalytic hydrogen production performance

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 131694 - 131694

Published: Jan. 1, 2025

Language: Английский

---

Influence of Halloysite Nanotubes from different deposits on the degradation of organic molecules

Ceramics International, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

---

Synergistic effect of RuNi alloy supported by carbon nanohorns for boosted hydrogen evolution from ammonia borane hydrolysis

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 690, P. 137264 - 137264

Published: March 8, 2025

Language: Английский

---

Recent progress on Cobalt‐based Heterogeneous Catalysts for Hydrogen Production from Ammonia Borane

ChemCatChem, Journal Year: 2024, Volume and Issue: 16(23)

Published: Aug. 28, 2024

Abstract Ammonia borane (NH 3 BH , AB) is a quintessential exemplar of chemical hydrogen storage materials and has been widely used in evolution. Although expensive metal catalysts (such as Rh, Ru, Pt, Ag, etc.) exhibit high activity the hydrolysis ammonia borane, inexpensive metals are more economical. Cobalt (Co), particular, not only relatively readily available, but also possesses selectivity. Compared to other catalysts, cobalt‐based have better durability can maintain catalytic for longer period time, making them favored by researchers. These demonstrate excellent stability, evolution rate, turn over frequency. This article summarized previous progress low price precipitation from focusing on supported various supports, especially those carbon materials, oxides, MOFs, nickel foams. The characteristics high‐performance systems analyzed detail. development prospects Co production were discussed. In summary, this review compiles types cobalt based recent years, identifies existing problems with these providing reference developers study catalysts. It believed that through careful regulation electronic spatial structures well‐designed non precious will play significant role decomposition borane.

Language: Английский

---

Decoration of Pt–Ni Alloy on Molten Salt Etched Halloysite Nanotubes for Enhanced Catalytic Reduction of 4-Nitrophenol

Separations, Journal Year: 2024, Volume and Issue: 11(11), P. 305 - 305

Published: Oct. 24, 2024

Efficient and low-cost nanocatalysts are extremely desirable for the catalytic reduction of 4-nitrophenol (4-NP). A smaller nanocatalyst particle size stronger support effect can significantly enhance performance. Naturally occurring halloysite nanotubes (HNTs) promising alternative supports fine metal nanoparticles, but smooth surface single type functional groups on HNTs usually unfavorable anchoring ions. Herein, we modified using a mild controllable molten salt etching method to create rough (rHNTs), followed by loading Pt–Ni alloys prepare Pt–Ni/rHNTs 4-NP. The results demonstrate that ultrafine alloy nanoparticles with diameter 1.60 nm uniformly dispersed rHNTs. performance be tuned adjusting amount Pt–Ni. optimized Pt–Ni/rHNT (1 wt %) reveals smallest highest rate 0.1953 min−1, which exceeds many Pt–Ni-based catalysts in previous reports. This work offers an ingenious idea modification brilliant perspective rational design inexpensive 4-NP nanocatalysts.

Language: Английский

---

Synthesis and characterization of Cu@Hal, an effective heterogeneous catalyst for aqueous multicomponent azide‐alkyne [3+2] cycloaddition reactions

ChemNanoMat, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 22, 2024

Abstract The synthesis of a nanocomposite material consisting Cu nanoparticles encapsulated in halloysite nanotubes (Cu@Hal) was achieved by the reduction Cu(NO 3 ) 2 ⋅ 3H O with sodium ascorbate/sodium borohydride an aqueous suspension trisodium citrate and halloysite. found to be effective heterogeneous catalyst for multicomponent copper catalyzed azide‐alkyne cycloaddition reaction (CuAAC). A variety terminal alkynes reacted benzyl halides azide presence Cu@Hal water. In situ formation organic azides afforded corresponding 1,4‐disubstituted 1,2,3‐triazoles regioselectivily, excellent yields. easily recovered recycled without loss activity low metal leaching.

Language: Английский

---

Encapsulating Ammonia Borane in Cobalt Decorated Kaolinite Monolith Aerogel for Hydrogen Storage and Controllable Release

ChemSusChem, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 12, 2024

Abstract Achieving the “on‐off” control of hydrogen release remains a huge challenge in efficiently harnessing energy on demand. In this work, controlled production strategy is proposed. Hydrogen carrier ammonia borane (AB) and Co catalyst are loaded into kaolinite aerogel (KA) to obtain composite AB@Co/KA monolith. The results show that particles with surface‐oxidized species uniformly decorated surface aerogel, AB can fill pores form storage material. generation modulated by tuning amount water added, which achieves an Co‐modified KA (Co/KA) be repackaged multiple times for recycling use after completely hydrolyzed. This work provides promising approach controlling neither input additional nor foreign reagents added reaction system.

Language: Английский

---