Review of surface water interactions with metal oxide nanoparticles

Calvin, Jason J.; Rosen, Peter F.; Ross, Nancy L.; Navrotsky, Alexandra; Woodfield, Brian F.

doi:10.1557/jmr.2019.33

Cited by 27 publications

(23 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The data for the loosely bound water in natrolite is quite similar in form to the heat capacity of the outer layers of water on titania nanoparticles (Calvin et al, 2019), which do not exhibit This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America. The published version is subject to change.…”

Section: Heat Capacity Of Zeolitic Watermentioning

confidence: 78%

Heat capacity and thermodynamic functions of partially dehydrated sodium and zinc zeolite A (LTA)

Dickson

Rosen

Neilsen

et al. 2021

American Mineralogist

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Heat Capacity Of Zeolitic Watermentioning

confidence: 78%

Heat capacity and thermodynamic functions of partially dehydrated sodium and zinc zeolite A (LTA)

Dickson

Rosen

Neilsen

et al. 2021

American Mineralogist

Self Cite

View full text Add to dashboard Cite

show abstract

“…The interaction between MgO particles and water is manifold and leads to different structures depending on the concentration of water and its form of admission to the precleaned particle surfaces (i.e., contact with water vapor or immersion into a condensed bulk liquid). At partial pressures in the 1–30 mbar range, which is comparable to those in air, water adsorption leads to coverages of a few layers, 5 , 43 and the dissociative adsorption of water results in surface energy changes that can trigger the formation of MgO nanocube stacking. Indeed, water vapor exposure of a MgO nanocube powder sample that was previously outgassed at T = 1173 K and at p < 10 –5 mbar ( Figure 2 a) has a profound impact on the microstructure of the powder.…”

Section: Resultsmentioning

confidence: 99%

Cubes to Cubes: Organization of MgO Particles into One-Dimensional and Two-Dimensional Nanostructures

Thomele

Baumann

Schneider

et al. 2021

Crystal Growth & Design

View full text Add to dashboard Cite

Developing simple, inexpensive, and environmentally benign approaches to integrate morphologically well-defined nanoscale building blocks into larger high surface area materials is a key challenge in materials design and processing. In this work, we investigate the fundamental surface phenomena between MgO and water (both adsorption and desorption) with particles prepared via a vapor-phase process (MgO nanocubes) and a modified aerogel process (MgO(111) nanosheets). Through these studies, we unravel a strategy to assemble individual MgO nanoparticles into extended faceted single-crystalline MgO nanosheets and nanorods with well-defined exposed surfaces and edges. This reorganization can be triggered by the presence of H 2 O vapor or bulk liquid water. Water adsorption and the progressive conversion of vapor-phase grown oxide particles into hydroxides give rise to either one-dimensional or two-dimensional (1D or 2D) structures of high dispersion and surface area. The resulting Mg(OH) 2 lamella with a predominant (001) surface termination are well-suited precursor structures for their topotactic conversion into laterally extended and uniform MgO(111) grain surface configurations. To understand the potential of polar (111) surfaces for faceting and surface reconstruction effects associated with water desorption, we investigated the stability of MgO(111) nanosheets during vacuum annealing and electron beam exposure. The significant surface reconstruction of the MgO(111) surfaces observed shows that adsorbate-free (111)-terminated surfaces of unsupported MgO nanostructures reconstruct rather than remain as charged planes of either three-fold coordinated O 2– ion or Mg 2+ ions. Thus, here we demonstrate the role water can play in surface formation and reconstruction by bridging wet chemical and surface science inspired approaches.

show abstract

“…Modeling of water adsorption on forsterite surface suggests that the adsorption on the (110) surface leads to water dissociation, , while the (010) surface favors molecular water. − ,, Therefore, on average, the surface of each forsterite nanoparticle is partially hydroxylated or hydrated depending on the sum of the contributions from multiple surfaces. The inherent water layers on TiO 2 nanoparticles have been studied due to their hygroscopic nature. ,− These indicate the existence of a hydroxylation/hydration layer that stabilizes the nanoparticles and can only be removed at a threshold temperature coincident with grain growth/coarsening, ,− e.g., ∼600 °C for anatase TiO 2 nanoparticles ranging from 7.7 to 32 nm . Similarly, a water desorption experiment using polished olivine single crystals indicated that the major surface species, i.e., hydroxyl groups, can be stable on the surface up to 900 K (627 °C) .…”

Section: Materials and Experimentsmentioning

confidence: 99%

Vibrational Behavior of Water Adsorbed on Forsterite (Mg₂SiO₄) Surfaces

Liu

Gautam

Daemen

et al. 2020

ACS Earth Space Chem.

View full text Add to dashboard Cite

The dynamics of water on or in a mineral substrate plays an important role in interfacial processes. This is because the structure and dynamics of interfacial water deviate from those of bulk water due to the change of interactions between surface water molecules and the interactions between the surface water and the substrate. This work presents a study of the vibrational behavior of water on a forsterite (Mg- end member of olivine) surface using inelastic neutron scattering (INS) and molecular dynamics (MD) simulations as complementary tools. The synthetic nano-forsterite used (dominated by the (010) crystal face), i.e., “dry” sample, inherently has a partial hydration/hydroxylation layer on the surface, as shown by previous studies and TGA. In the INS experiments, three water loadings (0.5, 1, and 2 monolayers) were added to the nano-forsterite surfaces. For samples with lower water loadings, i.e., dry and 0.5 monolayers, the INS spectra exhibited a red shift (lower frequency) of the water libration band and strengthening (blue shift, higher frequency) of the O–H stretching modes, implying weakening of the hydrogen bonding acting on the water molecules. In the simulations, we modeled the forsterite (010) surface and titrated it with two water loadings representing the lower and higher experimental water loadings. The lower loading in the simulation is equivalent to the dry and 0.5 monolayer samples in the experiment, thus suggesting weak hydrogen bonding between water molecules. The higher-loading simulation emulates the multilayer adsorption experiment. This produced a more significant shift of the vibrational bands, implying increased hydrogen-bonding strength and disorder between water molecules. The MD simulations complement the INS study by providing a detailed interfacial structure, and the combination of the two approaches provides a fundamental understanding of how the presence of the olivine surface impacts the vibrational behavior of water under different degrees of hydrationa phenomenon widely associated with terrestrial and extraterrestrial surfaces and near-surface processes.

show abstract

Review of surface water interactions with metal oxide nanoparticles

Abstract: Abstract

Cited by 27 publications

References 63 publications

Heat capacity and thermodynamic functions of partially dehydrated sodium and zinc zeolite A (LTA)

Heat capacity and thermodynamic functions of partially dehydrated sodium and zinc zeolite A (LTA)

Cubes to Cubes: Organization of MgO Particles into One-Dimensional and Two-Dimensional Nanostructures

Vibrational Behavior of Water Adsorbed on Forsterite (Mg₂SiO₄) Surfaces

Contact Info

Product

Resources

About

Review of surface water interactions with metal oxide nanoparticles

Abstract: Abstract

Cited by 27 publications

References 63 publications

Heat capacity and thermodynamic functions of partially dehydrated sodium and zinc zeolite A (LTA)

Heat capacity and thermodynamic functions of partially dehydrated sodium and zinc zeolite A (LTA)

Cubes to Cubes: Organization of MgO Particles into One-Dimensional and Two-Dimensional Nanostructures

Vibrational Behavior of Water Adsorbed on Forsterite (Mg2SiO4) Surfaces

Contact Info

Product

Resources

About

Vibrational Behavior of Water Adsorbed on Forsterite (Mg₂SiO₄) Surfaces