Microfluidic synthesis of ultrasmall Co nanoparticles over reduced graphene oxide and their catalytic properties

Yang, Mei; Luo, Le; Chen, Guangwen

doi:10.1002/aic.16950

Cited by 12 publications

(6 citation statements)

References 63 publications

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“…Shortening of the time required for production of such nanocomposite materials can prove to be a remedy for this. For this, use of microreactor-based methods can ease the synthesis and provide suitable material (Ansari et al, 2016;Patil et al, 2012;Suryawanshi et al, 2018;Yang et al, 2020). Catalytic applications of materials are very particular as far as the very properties of the catalyst are concerned.…”

Section: Preparation Techniques Of Graphene-tio 2 and Graphene-zno Nanocompositementioning

confidence: 99%

A review of graphene‐TiO₂ and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

Thakre

Barai

Bhanvase

2021

Water Environment Research

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Technologies for wastewater remediation have been growing ever since the environmental and health concern is realized. Development of nanomaterials has enabled mankind to have different methods to treat the various kinds of inorganic and organic pollutants present in wastewater from many resources.Among the many materials, semiconductor materials have found many environmental applications due to their outstanding photocatalytic activities. TiO 2 and ZnO are more effectively used as photocatalyst or adsorbents in the withdrawal of inorganic as well as organic wastes from the wastewater. On the other hand, graphene is tremendously being investigated for applications in environmental remediation in view of the superior physical, optical, thermal, and electronic properties of graphene nanocomposites. In this work, graphene-TiO 2 and graphene-ZnO nanocomposites have been reviewed for photocatalytic wastewater treatment. The various preparation techniques of these nanocomposites have been discussed. Also, different design strategies for graphene-based photocatalyst have been revealed. These nanocomposites exhibit promising applications in most of the water purification processes which are reviewed in this work. Along with this, the development of these nanocomposites using biomass-derived graphene has also been introduced. Practitioner Points• Graphene-TiO 2 and graphene-ZnO nanocomposites are effective for wastewater treatment through photocatalysis.• These nanocomposite photocatalysts have been used in the form of membrane as well as antibacterial agents.• Synthetic strategies and design considerations of graphene-based photocatalyst play a major role.• Biomass-derived graphene-TiO 2 and graphene-ZnO nanocomposites have also found application in wastewater treatment.

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Section: Preparation Techniques Of Graphene-tio 2 and Graphene-zno Nanocompositementioning

confidence: 99%

A review of graphene‐TiO₂ and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

Thakre

Barai

Bhanvase

2021

Water Environment Research

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“…polymerization) and selectivity (e.g. organic synthesis) 5,21‐25 . To target these process performance indicators, the micromixing performance of the reactors is a key factor 26,27 …”

Section: Introductionmentioning

confidence: 99%

Micromixing in a gas–liquid vortex reactor

et al. 2021

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The gas–liquid vortex reactor (GLVR) has substantial process intensification potential for multiphase processes. Essential in this respect is the micromixing efficiency, which is of great importance in fast reaction systems such as crystallization, polymerization, and synthesis of nanomaterials. By creating a vortex flow and taking advantage of the centrifugal force field, the liquid micromixing process can be intensified in the GLVR. Results show that introducing a liquid into a gas‐only vortex unit results in suppression of primary and secondary gas flow. The Villermaux–Dushman protocol is applied to study the effects of the gas flow rate, liquid flow rate, and liquid viscosity based on a segregation index. Based on the incorporation model and reaction kinetics, the micromixing time of the GLVR is determined to be in the range of 10−4 ~ 10−3 s, which is comparable to the highly efficient rotating packed bed and substantially better than a static mixer.

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“…Droplet-based microfluidics has been demonstrated to be a potential instrument for the processes such as drug development, chemical engineering, and biotechnology − due to its superior mass transfer performance and mixing efficiency. − These advantages are mainly governed by two elements: interfacial area and internal circulation flow. The internal circulation flow induced by shear stress can intensify chaotic advection to enhance mass transfer and mixing efficiency, , thus playing a significant role in the performance of reactions in droplets.…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of Internal Flow and Mixing within Droplets in a T-Junction Microchannel

Yao

et al. 2021

Ind. Eng. Chem. Res.

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This work performed a three-dimensional numerical investigation on the effect of the viscosity ratio on the circulation topology and mixing inside droplets in a T-junction microchannel using the volume-of-fluid method. The results suggest that the recirculation zone shrinks at both ends of the droplet with increasing viscosity ratios, whereas it expands in the droplet’s main body. A modified non-dimensional circulation time was defined by considering the local circulation, which can better capture the influence of the viscosity ratio on the mixing intensity. The results show that the mixing intensity decreases with higher viscosity ratios, especially at the front end of the droplet. The mixing inside the droplets is limited mainly due to the isolation of the symmetrical recirculation vortices. Accordingly, an improvement to the T-junction was proposed to break the balance of the flow symmetry at the droplet formation stage, thus significantly enhancing the mixing intensity.

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Microfluidic synthesis of ultrasmall Co nanoparticles over reduced graphene oxide and their catalytic properties

Cited by 12 publications

References 63 publications

A review of graphene‐TiO₂ and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

A review of graphene‐TiO₂ and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

Micromixing in a gas–liquid vortex reactor

CFD Simulation of Internal Flow and Mixing within Droplets in a T-Junction Microchannel

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Microfluidic synthesis of ultrasmall Co nanoparticles over reduced graphene oxide and their catalytic properties

Cited by 12 publications

References 63 publications

A review of graphene‐TiO2 and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

A review of graphene‐TiO2 and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

Micromixing in a gas–liquid vortex reactor

CFD Simulation of Internal Flow and Mixing within Droplets in a T-Junction Microchannel

Contact Info

Product

Resources

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A review of graphene‐TiO₂ and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment

A review of graphene‐TiO₂ and graphene‐ZnO nanocomposite photocatalysts for wastewater treatment