Journal
APPLIED SURFACE SCIENCE
Volume 527, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2020.146719
Keywords
Seed-mediated co-reduction; Bimetallic nanomaterials; Morphology regulation
Categories
Funding
- National Natural Science Foundation of China [21872119]
- Talent Engineering Training Funding Project of Hebei Province [A201905004]
- Research Program of the College Science and Technology of Hebei Province [ZD2018091, ZD2019069]
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A seed-mediated co-reduction (SMCR) method that is simple to operate and produces heterogeneous components by the simultaneous co-reduction strategy to grow crystal was used to prepare a bimetallic nanomaterial, composed of two components of uniform metal elements. In this work, three different cationic surfactants were studied to control the morphology of bimetallic compound materials: cetyltrimethylammonium bromide (CTAB), cetyltrimethylammonium chloride (CTAC), and cetylpyridinium bromide (C16Py). Three mature and stable palladium crystal particles and the same number of Pd-Cu bimetallic nanomaterials (BNMs) products were obtained. The system of Pd and Cu bimetallic components, which has a large lattice mismatch, was grown uniformly by atomic layer-by-layer deposition under the SMCR method. The experimental results of BNMs for two nitro compounds (2-NA and 4-NP) were obtained by UV-vis spectral characterization. The prepared BNMs showed excellent catalytic ability in the reduction reaction and completed the catalytic reaction within 93 s. After eight consecutive catalytic cycles, the conversion of the catalytic reaction reached more than 90%. A set of surface-enhanced Raman scattering (SERS) experiments were also used to test the Raman enhancement properties of these BNMs, demonstrating a good SERS enhancement effect and good uniformity. These research results provide a new research topic for the exploration of morphology-controlled bimetal nanomaterials.
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