Tuning Morphologies and Reactivities of Hybrid Organic-Inorganic Nanoparticles

被引:14
作者
Schneider, Joanna [1 ]
Liu, Jason X. [2 ]
Lee, Victoria E. [1 ]
Prud'homme, Robert K. [1 ]
Datta, Sujit S. [1 ]
Priestley, Rodney D. [1 ]
机构
[1] Princeton Univ, Chem & Biol Engn, Princeton, NJ 08544 USA
[2] Princeton Univ, Mech & Aerosp Engn, Princeton, NJ 08544 USA
基金
美国国家科学基金会;
关键词
hybrid nanoparticle; nanocatalyst; adsorption; aggregation; dispersal; internalization; VALENT IRON NANOPARTICLES; POLYMER; PARTICLES; AGGREGATION; PRECIPITATION; SEDIMENTATION; SEPARATION; STABILITY; PLATFORM; REMOVAL;
D O I
10.1021/acsnano.2c04585
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Hybrid nanoparticles (hNPs), or nanoparticles composed of both organic and inorganic components, hold promise for diverse energy and environmental applications due to their ability to stabilize reactive nanomaterials against aggregation, enhancing their ability to pervade tortuous spaces and travel long distances to degrade contaminants in situ. Past studies have investigated the use of polymer or surfactant coatings to stabilize nanomaterials against aggregation. However, fabrication of these materials often requires multiple steps and lacks specificity in the control of their morphologies and reactivities. Here, we demonstrated a method of producing stable hNPs with tunable morphologies by incubating polystyrene nanoparticles formed via Flash NanoPrecipitation with citratestabilized gold nanocatalysts. Using this simple fabrication technique, we found that gold adsorption to polystyrene nanoparticles was enabled by the presence of a good solvent for polystyrene. Furthermore, changing process parameters, such as gold incubation time, and molecular parameters, such as polymer molecular weight and end-group functionality, provided control over the resultant nanocatalyst loading and dispersal atop hNPs. We classified these morphologies into three distinct regimes-aggregated, dispersed, or internalized-and we showed that the emergence of these regimes has key implications for controlling reaction rates in applications such as heterogeneous catalysis or groundwater remediation. Specifically, we found that hNPs with gold nanocatalysts embedded below the surfaces of polystyrene nanoparticles exhibited slower bulk catalytic reduction capacity than their disperse, surface-decorated counterparts. Taken together, our work demonstrates a simple way by which hNPs can be fabricated and presents a method to control catalytic reactions using reactive nanomaterials.
引用
收藏
页码:16133 / 16142
页数:10
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