期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 209, 期 -, 页码 464-471出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2022.04.046
关键词
Cellulose nanocrystal; Self-assembly; Gold nanoparticle; Catalysis
资金
- National Natural Science Foundation of China [U21A2096]
- Science and Technology Fund for Distinguish Young Scholars of Sichuan Province [2019JDJQ0025]
- State Key Labo-ratory of Polymer Materials Engineering [sklpme2020-3-09]
- Fundamental Research Funds for the Central Universities
This study proposes a new biomass-mediated templating approach using cellulose nanocrystals to control the growth of gold nanoparticles. By regulating the self-assembly structure of nanocrystals, the size of gold nanoparticles can be precisely adjusted, resulting in high catalytic performance.
Advanced templating methods have shown precise regulation of the micro/nanostructures of inorganic catalysts. Here, on the basis of controlled self-assembly and micro-structures of cellulose nanocrystals (CNCs), a new bio-mass-mediated templating approach is proposed to control the growth of gold nanoparticles (Au NPs). The catalytic performance of the as-prepared Au NPs was evaluated using p-nitrophenol as a model pollutant. TEM, POM, zeta-potential, and rheological measurements were conducted to investigate the structure and catalytic activity of the nano-materials. By regulating the chiral nematic liquid crystal texture formed by the self-assembly of CNCs, the size of Au NPs could be adjusted at the nanoscale dimension, from 1.38 +/- 0.38 nm to 4.25 +/- 1.24 nm. Depending on the Au size, a high catalytic effect, namely, 98.0% conversion rate, was obtained within 30 min. The conversion rate was maintained at 97.0% even after 3-run cyclic application. Such findings demonstrate the potential of using CNCs as a bio-template to control the growth of nanomaterials.
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