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Title: Controlling Catalyst-Phase Selectivity in Complex Mixtures with Amphiphilic Janus Particles

Abstract

Amphiphilic Janus particles with a catalyst selectively loaded on either the hydrophobic or hydrophilic region are promising candidates for efficient and phase-selective interfacial catalysis. In this paper, we report the synthesis and characterization of Janus silica particles with a hydrophilic silica domain and a silane-modified hydrophobic domain produced via a wax masking technique. Palladium nanoparticles were regioselectively deposited on the hydrophobic side, and the phase selectivity of the catalytic Janus particles was established through the kinetic studies of benzyl alcohol hydrodeoxygenation (HDO). These studies indicated that the hydrophobic moiety provided nearly 100× the catalytic activity as the hydrophilic side for benzyl alcohol HDO. The reactivity was linked to the anisotropic catalyst design through microscopy of the particles. The catalysts were also used to achieve phase-specific compartmentalized hydrogenation and selective in situ catalytic degradation of a model oily pollutant in a complex oil/water mixture.

Authors:
 [1];  [1]; ORCiD logo [1]
  1. Univ. of Colorado, Boulder, CO (United States)
Publication Date:
Research Org.:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division; Colorado Shared Instrumentation in Nanofabrication and Characterization (COSINC); US Department of Education
OSTI Identifier:
1658623
Grant/Contract Number:  
SC0005239
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 12; Journal Issue: 2; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 54 ENVIRONMENTAL SCIENCES; Janus particles; catalytic Janus particles; Pickering emulsion; interfacial catalysis; selective catalysis

Citation Formats

Greydanus, Benjamin, Schwartz, Daniel K., and Medlin, J. Will. Controlling Catalyst-Phase Selectivity in Complex Mixtures with Amphiphilic Janus Particles. United States: N. p., 2019. Web. https://doi.org/10.1021/acsami.9b16957.
Greydanus, Benjamin, Schwartz, Daniel K., & Medlin, J. Will. Controlling Catalyst-Phase Selectivity in Complex Mixtures with Amphiphilic Janus Particles. United States. https://doi.org/10.1021/acsami.9b16957
Greydanus, Benjamin, Schwartz, Daniel K., and Medlin, J. Will. Wed . "Controlling Catalyst-Phase Selectivity in Complex Mixtures with Amphiphilic Janus Particles". United States. https://doi.org/10.1021/acsami.9b16957. https://www.osti.gov/servlets/purl/1658623.
@article{osti_1658623,
title = {Controlling Catalyst-Phase Selectivity in Complex Mixtures with Amphiphilic Janus Particles},
author = {Greydanus, Benjamin and Schwartz, Daniel K. and Medlin, J. Will},
abstractNote = {Amphiphilic Janus particles with a catalyst selectively loaded on either the hydrophobic or hydrophilic region are promising candidates for efficient and phase-selective interfacial catalysis. In this paper, we report the synthesis and characterization of Janus silica particles with a hydrophilic silica domain and a silane-modified hydrophobic domain produced via a wax masking technique. Palladium nanoparticles were regioselectively deposited on the hydrophobic side, and the phase selectivity of the catalytic Janus particles was established through the kinetic studies of benzyl alcohol hydrodeoxygenation (HDO). These studies indicated that the hydrophobic moiety provided nearly 100× the catalytic activity as the hydrophilic side for benzyl alcohol HDO. The reactivity was linked to the anisotropic catalyst design through microscopy of the particles. The catalysts were also used to achieve phase-specific compartmentalized hydrogenation and selective in situ catalytic degradation of a model oily pollutant in a complex oil/water mixture.},
doi = {10.1021/acsami.9b16957},
journal = {ACS Applied Materials and Interfaces},
number = 2,
volume = 12,
place = {United States},
year = {2019},
month = {12}
}

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