Bamboo-inspired design of a stable and high-efficiency catalytic capillary microreactor for nitroaromatics reduction

Li, Jingpeng; Ma, Rumin; Lu, Yun; Wu, Zaixing; Liu, Rong; Su, Minglei; Jin, Xiaobei; Zhang, Rong; Bao, Yan; Chen, Yuhe; Qin, Daochun; Yang, Dongjiang; Jiang, Zehui

doi:10.1016/j.apcatb.2022.121297

Cited by 35 publications

(26 citation statements)

References 42 publications

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“…The electron–hole recombination is effectively suppressed. Inspired by the previously reported work, the active hydrogen species (H*) with strong reducibility may be produced during the photocatalytic reaction. And the active hydrogen species can catalyze 4-NP to 4-AP in the NaBH 4 system.…”

Section: Resultsmentioning

confidence: 99%

Three-Dimensional Hierarchical Seaweed-Derived Carbonaceous Network with Designed g-C₃N₄ Nanosheets: Preparation and Mechanism Insight for 4-Nitrophenol Photoreduction

Zhao

Wang

et al. 2022

Langmuir

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The development of g-C3N4-based photocatalysts with abundant active sites is of great significance for photocatalytic reactions. Herein, a smart and robust strategy was presented to fabricate three-dimensional (3D) g-C3N4 nanosheet-coated alginate-based hierarchical porous carbon (g-C3N4@HPC), including coating melamine on calcium alginate (CA) hydrogel beads, freeze-drying hydrogel beads as well as pyrolysis at high temperatures. The resulting photocatalyst possessed a significantly high surface area and a large amount of interconnected macropores compared with porous carbon without the melamine coating. The unique structural features could effectively inhibit the curling and agglomeration of g-C3N4 nanosheets, provide abundant photocatalytic active sites, and promote mass diffusion. Therefore, the g-C3N4@HPC composite exhibited remarkable photocatalytic activity and outstanding stability toward the photoreduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by NaBH4 under natural sunlight and simulated visible-light irradiation (λ > 420 nm) using a 300 W xenon lamp. Moreover, the mechanism toward the photocatalytic reaction was extensively studied by quenching experiments and electron spin resonance (ESR) experiments. The results showed that active hydrogen species were able to be achieved by following a dual-channel pathway in the NaBH4 system, which included photocatalytic reduction of H+ ions and photocatalytic oxidation of BH4 – ions. This work not only opens up a new way to design efficient photocatalysts for various reactions but also provides a reference for an in-depth study of the photoreduction mechanism.

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Section: Resultsmentioning

confidence: 99%

Three-Dimensional Hierarchical Seaweed-Derived Carbonaceous Network with Designed g-C₃N₄ Nanosheets: Preparation and Mechanism Insight for 4-Nitrophenol Photoreduction

Zhao

Wang

et al. 2022

Langmuir

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“…Colloidal silver ink impregnation into the microchannels allowed to obtain the highest conductivity cellulose-based ordered material for a new generation of bambootronics devices, such as 3D electric circuits, micro uidic heaters, and fully integrated micro electrochemical cells (Pandoli et al 2020). Jinpeng Li and co-workers have recently incorporated catalytic Ag-NPs into the bamboo vascular bundles to obtain a stable and high-e ciency catalytic microreactor for nitroaromatics reduction (Li et al 2022).…”

Section: )mentioning

confidence: 99%

An investigation of the fluid-holding cavities in a lignocellulose-based bamboo matrix via a combined X-ray microtomography and proton time-domain NMR approach

Rodrigues

Neto

Alves

et al. 2023

Preprint

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Bamboo (Dendrocalamus giganteus) is a functionally graded material with well-organized hierarchical structures. Its micrometer-sized vascular bundles and parenchymatic living cells allow an efficient upward flow of water and nutrients, endowing the organism with remarkably fast growth. As demonstrated recently, the hollow microstructure channels can be explored as a natural template for microfluidics applications in chemical synthesis, analytical detection, solar steam generation, and electrochemical devices. Thus, the knowledge of the kinetics of the imbibition and spatial distribution of fluid through the microcavities of the bamboo vegetal tissue became of interest. Here, we employed a combination of X-ray microtomography (µCT) and proton time-domain NMR (TD-NMR) to identify, measure, and investigate empty volumes embedded in the bamboo's tissue as experienced by different organic and inorganic fluids, namely dimethyl sulfoxide (DMSO) and distilled water (H2O). Results have shown that the extensive communication between the voids (parenchymal cells and vascular channels) does not prevent the individuation of fluid reservoirs with different behaviors, as evidenced by the H2O desorption profile. Bamboo parenchyma was the tissue that retained more residual H2O after desorption. The difference in wettability of bamboo tissues by DMSO and H2O was detected.

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“…This issue can be resolved by creating chaotic advection or turbulence through active or passive micromixers [ 19 ] or the utilization of flexible and soft walled microchannels [ 20 ]. As to the substrate materials for the microfluidic chips, silicon, glass, polymers, metals, ceramics, paper, natural biomass polymer scaffolds [ 21 , 22 , 23 , 24 , 25 ], or a hybrid of the above have been utilized. Although silicon was the first material to be adopted due to its processability through semiconductor processing techniques, polymers have emerged to have their own place thanks to their numerous merits, such as chemical inertness, thermal stability, mechanical flexibility, optical transparency, biocompatibility, biodegradability, good electrical insulation, diverse surface modification with ease, recyclability, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Polymer Microfluidics: An Overview

Juang

Chiu

2022

Polymers

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Microfluidic platform technology has presented a new strategy to detect and analyze analytes and biological entities thanks to its reduced dimensions, which results in lower reagent consumption, fast reaction, multiplex, simplified procedure, and high portability. In addition, various forces, such as hydrodynamic force, electrokinetic force, and acoustic force, become available to manipulate particles to be focused and aligned, sorted, trapped, patterned, etc. To fabricate microfluidic chips, silicon was the first to be used as a substrate material because its processing is highly correlated to semiconductor fabrication techniques. Nevertheless, other materials, such as glass, polymers, ceramics, and metals, were also adopted during the emergence of microfluidics. Among numerous applications of microfluidics, where repeated short-time monitoring and one-time usage at an affordable price is required, polymer microfluidics has stood out to fulfill demand by making good use of its variety in material properties and processing techniques. In this paper, the primary fabrication techniques for polymer microfluidics were reviewed and classified into two categories, e.g., mold-based and non-mold-based approaches. For the mold-based approaches, micro-embossing, micro-injection molding, and casting were discussed. As for the non-mold-based approaches, CNC micromachining, laser micromachining, and 3D printing were discussed. This review provides researchers and the general audience with an overview of the fabrication techniques of polymer microfluidic devices, which could serve as a reference when one embarks on studies in this field and deals with polymer microfluidics.

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Bamboo-inspired design of a stable and high-efficiency catalytic capillary microreactor for nitroaromatics reduction

Cited by 35 publications

References 42 publications

Three-Dimensional Hierarchical Seaweed-Derived Carbonaceous Network with Designed g-C₃N₄ Nanosheets: Preparation and Mechanism Insight for 4-Nitrophenol Photoreduction

Three-Dimensional Hierarchical Seaweed-Derived Carbonaceous Network with Designed g-C₃N₄ Nanosheets: Preparation and Mechanism Insight for 4-Nitrophenol Photoreduction

An investigation of the fluid-holding cavities in a lignocellulose-based bamboo matrix via a combined X-ray microtomography and proton time-domain NMR approach

Fabrication of Polymer Microfluidics: An Overview

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Bamboo-inspired design of a stable and high-efficiency catalytic capillary microreactor for nitroaromatics reduction

Cited by 35 publications

References 42 publications

Three-Dimensional Hierarchical Seaweed-Derived Carbonaceous Network with Designed g-C3N4 Nanosheets: Preparation and Mechanism Insight for 4-Nitrophenol Photoreduction

Three-Dimensional Hierarchical Seaweed-Derived Carbonaceous Network with Designed g-C3N4 Nanosheets: Preparation and Mechanism Insight for 4-Nitrophenol Photoreduction

An investigation of the fluid-holding cavities in a lignocellulose-based bamboo matrix via a combined X-ray microtomography and proton time-domain NMR approach

Fabrication of Polymer Microfluidics: An Overview

Contact Info

Product

Resources

About

Three-Dimensional Hierarchical Seaweed-Derived Carbonaceous Network with Designed g-C₃N₄ Nanosheets: Preparation and Mechanism Insight for 4-Nitrophenol Photoreduction

Three-Dimensional Hierarchical Seaweed-Derived Carbonaceous Network with Designed g-C₃N₄ Nanosheets: Preparation and Mechanism Insight for 4-Nitrophenol Photoreduction