The wet chemical synthesis of Co nanoparticles in a microreactor system: A time-resolved investigation by X-ray absorption spectroscopy

Zinoveva, Svetlana; Silva, Rohini De; Louis, Russell; Datta, Proyag; Kumar, Challa S. S. R.; Goettert, Jost; Hormes, J.

doi:10.1016/j.nima.2007.08.116

Cited by 24 publications

(18 citation statements)

References 6 publications

(7 reference statements)

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“…Advances in in situ spectroscopy measurements (43)(44)(45) and quantum mechanical calculations (21, 42) are enabling such detailed kinetic studies of simple reaction systems without the influence of flow effects. If one looks at industrial-scale reactors, such as fluid catalytic crackers, the feed is a complex mixture of hydrocarbons, and the reaction pathways to products are very complex indeed.…”

Section: Understanding and Modeling Intrinsic Reaction Rate Mechanismsmentioning

confidence: 99%

Computational Modeling of Multiphase Reactors

Joshi

Nandakumar²

2015

Annu. Rev. Chem. Biomol. Eng.

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Multiphase reactors are very common in chemical industry, and numerous review articles exist that are focused on types of reactors, such as bubble columns, trickle beds, fluid catalytic beds, etc. Currently, there is a high degree of empiricism in the design process of such reactors owing to the complexity of coupled flow and reaction mechanisms. Hence, we focus on synthesizing recent advances in computational and experimental techniques that will enable future designs of such reactors in a more rational manner by exploring a large design space with high-fidelity models (computational fluid dynamics and computational chemistry models) that are validated with high-fidelity measurements (tomography and other detailed spatial measurements) to provide a high degree of rigor. Understanding the spatial distributions of dispersed phases and their interaction during scale up are key challenges that were traditionally addressed through pilot scale experiments, but now can be addressed through advanced modeling.

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Section: Understanding and Modeling Intrinsic Reaction Rate Mechanismsmentioning

confidence: 99%

Computational Modeling of Multiphase Reactors

Joshi

Nandakumar²

2015

Annu. Rev. Chem. Biomol. Eng.

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“…Theoretical simulations using the FEFF program were performed as well. XANES was used to study Co nanoparticles in a microreactor for wet-chemical synthesis by Zinoverva et al [135]. They obtained XANES profiles at different stages of the reaction, although further analyses are needed for the interpretation of the data.…”

Section: Nanomaterials Made Ex Situmentioning

confidence: 99%

More power to X‐rays: New developments in X‐ray spectroscopy

Guo¹

2009

Laser & Photonics Reviews

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Recent developments in X-ray spectroscopy in the last decade are reviewed. A specific emphasis is placed on displaying the strong natural connection between X-ray spectroscopy and materials science. Brief explanations of several X-ray spectroscopic methods are given. X-ray spectroscopic instruments such as table-top X-ray sources are discussed in detail, whereas those employing synchrotron and other sources are briefly addressed. The spectroscopic methods and results from materials investigations are reviewed according to their positions in a 3D parameter space of time, length, and energy. New experimental measurements on atoms, molecules, nanomaterials, and bulk materials that include insulators, semiconductors, metals and magnetic materials using both static and time-resolved methods are reviewed.A typical table-top experimental setup to probe a sample using an optical pump (green color beam) -X-ray probe (purple color beam) technique. The X-ray pulses are produced by femtosecond optical pulses. Two exemplary data are displayed: One is direct imaging of plasmas generated from laser evaporation of a solid target (Imaging data) and the other is an X-ray absorption spectrum of a nickel sample (USEXAS data).

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“…In addition to the synthesis of chemicals and nanomaterials, the millifluidics could offer, due to higher volume and concentration at the probe area, a synthetic platform that is more generalized and efficient for time-resolved kinetic studies and also achieves better signal to noise ratio than microfluidic systems 7,10 . We show the use of millifluidic chip as an example for time resolved analysis of the growth of gold nanostructures from solution using in situ XAS with a time resolution as small as 5 msec 11 .…”

Section: Introductionmentioning

confidence: 99%

Millifluidics for Chemical Synthesis and Time-resolved Mechanistic Studies

Krishna

Biswas

Navin

et al. 2013

JoVE

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Procedures utilizing millifluidic devices for chemical synthesis and time-resolved mechanistic studies are described by taking three examples. In the first, synthesis of ultra-small copper nanoclusters is described. The second example provides their utility for investigating time resolved kinetics of chemical reactions by analyzing gold nanoparticle formation using in situ X-ray absorption spectroscopy. The final example demonstrates continuous flow catalysis of reactions inside millifluidic channel coated with nanostructured catalyst. Video LinkThe video component of this article can be found at

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The wet chemical synthesis of Co nanoparticles in a microreactor system: A time-resolved investigation by X-ray absorption spectroscopy

Cited by 24 publications

References 6 publications

Computational Modeling of Multiphase Reactors

Computational Modeling of Multiphase Reactors

More power to X‐rays: New developments in X‐ray spectroscopy

Millifluidics for Chemical Synthesis and Time-resolved Mechanistic Studies

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