High-surface-area SBA-15–SO3H with enhanced catalytic activity by the addition of poly(ethylene glycol)

Nanoparticles play a significant role in various fields ranging from electronics to composite materials development. Among them, metal nanoparticles have attracted much attention in recent decades due to their high surface area, selectivity, tunable morphologies, and remarkable catalytic activity. In this review, we discuss various possibilities for the synthesis of different metal nanoparticles; specifically, we address some of the green synthesis approaches. In the second part of the paper, we review the catalytic performance of the most commonly used metal nanoparticles and we explore a few roadblocks to the commercialization of the developed metal nanoparticles as efficient catalysts.

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Large-scale and facile synthesis of a porous high-entropy alloy CrMnFeCoNi as an efficient catalyst

Journal of Materials Chemistry A ◽

10.1039/d0ta04940a ◽

2020 ◽

Vol 8 (35) ◽

pp. 18318-18326 ◽

Cited By ~ 1

Author(s):

Hailong Peng ◽

Yangcenzi Xie ◽

Zicheng Xie ◽

Yunfeng Wu ◽

Wenkun Zhu ◽

...

Keyword(s):

Catalytic Activity ◽

Surface Area ◽

Large Scale ◽

High Surface ◽

High Surface Area ◽

Catalytic Performance ◽

High Entropy Alloy ◽

Facile Synthesis ◽

Efficient Catalyst ◽

High Entropy

Porous high entropy alloy CrMnFeCoNi exhibited remarkable catalytic activity and stability toward p-nitrophenol hydrogenation. The enhanced catalytic performance not only resulted from the high surface area, but also from exposed high-index facets with terraces.

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Synthesis and Characterization of Flower-Like Co–La Oxide Micro/Nano Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1058.25 ◽

2014 ◽

Vol 1058 ◽

pp. 25-29

Author(s):

Shi Jing Lin ◽

Wu Tong Du ◽

Ting Ting Ding ◽

Yu Zhao ◽

You Zhao ◽

...

Keyword(s):

Ethylene Glycol ◽

Surface Area ◽

High Surface ◽

High Surface Area ◽

Building Blocks ◽

Cobalt Nitrate ◽

Element Distribution ◽

Bet Surface Area ◽

Ammonium Bromide ◽

Micrometer Scale

Flower-like Co–La oxide micro/nanomaterials have been synthesized via an ethylene-glycol-mediated process, under the condition of that the mole ratio of lanthanum nitrate (La (NO3)3·6H2O) and cobalt nitrate (Co (NO3)2·6H2O) was 1:1 (based on the amount of Co (NO3)2·6H2O 0.002 mol), the dosage of urea was 2.2 g, the dosage of tetra-butyl ammonium bromide (TBAB) was 6.0 g, with magnetic stirring heating under 170 °C for 60 minutes in the 150mL ethylene glycol, the prepared precursors of Co–La oxides have regular flower-like morphology, in addition, the amount of TBAB and urea plays a significant role on the synthesis of the precursors. The flower-like Co–La oxides micro/nanomaterials were prepared after the precursors were calcinated in the muffle furnace at 800 °C for 2 h, the morphology, crystal properties and element distribution of the products were investigated by the analysis of SEM-EDX, XRD and BET, etc. The structures of these products with regular flower-like morphology are on the micrometer scale, which are hierarchically composed of nanosized building blocks, with highly polycrystalline nature, and the Brunauer–Emmett–Teller (BET) surface area of 68.5 m2/g. Therefore, those micro/nanomaterials have been developed as promising catalytic materials for their not only keeping the high surface area of nanomaterials, but effectively inhibiting aggregation.

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