Journal
ACS APPLIED NANO MATERIALS
Volume 2, Issue 1, Pages 546-553Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.8b02112
Keywords
hyper-cross-linked polymers; high surface area; micropores; Au nanoparticles; confinement effect; catalysis; nitrophenol reduction; recyclability
Funding
- National Natural Science Foundation of China [21604028, 21571071, 21474033]
- International S&T Cooperation Program of China [2016YFE0124400]
- Program for HUST Interdisciplinary Innovation Team [2016JCTD104]
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The development of metal nanoparticles supported in porous materials is important for the development of highly efficient heterogeneous catalysis. Because of the quantum-size effect, the size of the metal nanoparticles is key to achieving high catalytic activity. Therefore, the tuning of nanoparticle size is a critical step for efficient heterogeneous catalytic systems. Hyper-cross-linked polymers (HCPs) with tunable surface area, high stability, narrow pore size, and low cost have found intriguing applications in heterogeneous catalysis as catalyst supports. Herein, we report that gold nanoparticles can be controlled within the size range of 1.7-5.1 nm in HCPs simply by modulating the loading mass ratio of HAuCl4 .4H(2)O/HCP-TPMT. The resulting heterogeneous catalysts showed high catalytic activity and recyclability toward catalytic reduction of 4-nitrophenol. In addition, we found that the smallest Au nanoparticle sizes exhibited the highest normalized reaction constant (K-nor). These results demonstrate an effective strategy for preparing size-controllable metal nanoparticles by using hyper-crosslinked polymers as catalyst supports for heterogeneous catalysis.
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