Nickel oxide nanoparticle synthesis and photocatalytic applications: evolution from conventional methods to novel microfluidic approaches

Mou, Jiayou; Ren, Yong; Wang, Jing; Wang, Chenxi; Zou, Yibo; Lou, Kexia; Zheng, Zansheng; Zhang, Da

doi:10.1007/s10404-022-02534-2

Cited by 26 publications

(9 citation statements)

References 135 publications

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“…The α structure consists of Ni(OH) 2 layers with intercalated water molecules or anions, while the β form has a hexagonal close-packed structure. Due to its lower stability, α-Ni(OH) 2 typically recrystallizes to the green β phase. − Raman spectroscopy measurements of our membrane samples identify the dominant phase as β-Ni(OH) 2 (Figure S2). However, we also observe a gel-like product that, depending on illumination, appears brownish or white and seems to have a higher contribution of the α-Ni(OH) 2 phase (Figure S2).…”

Section: Resultsmentioning

confidence: 97%

Shape Evolution of Precipitate Membranes in Flow Systems

et al. 2023

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Chemical gardens are macroscopic structures that form when a salt seed is submerged in an alkaline solution. Their thin precipitate membranes separate the reactant partners and slow down the approach toward equilibrium. During this stage, a gradual thickening occurs, which is driven by steep cross-membrane gradients and governed by selective ion transport. We study these growth dynamics in microfluidic channels for the case of Ni(OH) 2 membranes. Fast flowing reactant solutions create thickening membranes of a nearly constant width along the channel, whereas slow flows produce wedge-shaped structures that fail to grow along their downstream end. The overall dynamics and shapes are caused by the competition of reactant consumption and transport replenishment. They are reproduced quantitatively by a two-variable reaction−diffusion−advection model which provides kinetic insights into the growth of precipitate membranes.

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Section: Resultsmentioning

confidence: 97%

Shape Evolution of Precipitate Membranes in Flow Systems

et al. 2023

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“…However, active microfluidic reactors promise the synthesis of highly monodisperse nanoparticles with novel features. 95,96 Consequently, it is crucial to explore different types of active microfluidic reactors reported in scientific literature for producing nanoparticles for biomedical applications. Active microfluidic reactors can be classified as acoustic, pressure, temperature, or magnetic, based on the external energy employed.…”

Section: Synthesis Of Nanoparticles Using Active Micromixers For Biom...mentioning

confidence: 99%

Active microfluidic reactor-assisted controlled synthesis of nanoparticles and related potential biomedical applications

et al. 2023

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“…[3][4][5][6] The photodegradation of industrial pollutants is based on sunlight or ultraviolet light as the energy source and semiconductor materials with appropriate band gaps as photocatalysts to carry out photocatalytic redox reactions, decomposing toxic molecules into benign substances such as CO 2 and H 2 O. 7 At present, the photocatalysts used in the photodegradation of organic pollutants include metal oxides, 8 metal sul-fides, 9 metal nanoparticles, 10 carbon nitrides, 11 species quantum dots, 12 covalent organic frameworks (COFs), 13 metalorganic frameworks (MOFs) 14 and so on. However, the use of these photocatalysts comes with problems such as inadequate sunlight utilization, 15 exciton recombination, 16 insubstantial exposure of the active site, 17 and unclear structure-activity relationships.…”

Section: Introductionmentioning

confidence: 99%