Synthesis, dissolution, and regeneration of silver nanoparticles stabilized by tannic acid in aqueous solution
- 167 Downloads
Silver nanoparticles (AgNPs), especially with small size, are easy to release silver ion in aqueous solution owing to various reasons, which would significantly affect the stability, properties, and application of AgNPs. In this paper, monodisperse AgNPs with small size of ca. 10 nm were successfully prepared based on solid-state reactions. Ascorbic acid (AA) was used as reductant and tannic acid (TA) was used both as reductant and stabilizer in this environmentally friendly reaction. The dissolution and regeneration of the as-prepared TA-AgNPs in pure water were investigated by UV−vis spectra, TEM observations, and differential pulse anodic stripping voltammetry. The results indicated that the TA-AgNPs showed a little higher dissolution than conventional PVP-coated ones with similar size. However, the dissolved silver ion in the TA-AgNPs aqueous solution could be recovered just by adjusting the pH of the solution, which could be attributed to the reductant performance of TA at alkaline conditions. After regeneration, some smaller nanoparticles appeared in TA-AgNPs aqueous solution, indicating that new nucleation formed and the dissolved silver ions were actually recovered to Ag0.
KeywordsSilver nanoparticles Tannic acid Dissolution Regeneration Anodic stripping voltammetry Metal nanomaterials
This work was supported by the National Natural Science Foundation of China (Grant No. 21501152), the Key Program of Henan Province for Science and Technology (Grant No. 172102210067), and the Doctoral Research Foundation of Zhengzhou University of Light Industry (Grant No. 2014BSJJ057).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All relevant ethical standards were satisfied.
- Huang X, Zhou H, Huang Y, Jiang H, Yang N, Shahzad SA, Meng L, Yu C (2018) Silver nanoparticles decorated and tetraphenylethene probe doped silica nanoparticles: a colorimetric and fluorometric sensor for sensitive and selective detection and intracellular imaging of hydrogen peroxide. Biosens Bioelectron 121:236–242. https://doi.org/10.1016/j.bios.2018.09.023 CrossRefGoogle Scholar
- Li M, Huang L, Wang X, Song Z, Zhao W, Wang Y, Liu J (2018a) Direct generation of Ag nanoclusters on reduced graphene oxide nanosheets for efficient catalysis, antibacteria and photothermal anticancer applications. J Colloid Interface Sci 529:444–451. https://doi.org/10.1016/j.jcis.2018.06.028 CrossRefGoogle Scholar
- Li Q, Lu F, Ye H, Yu K, Lu B, Bao R, Xiao Y, Dai F, Lan G (2018b) Silver inlaid with gold nanoparticles: enhanced antibacterial ability coupled with the ability to visualize antibacterial efficacy. ACS Sustain Chem Eng 6:9813–9821. https://doi.org/10.1021/acssuschemeng.8b00931 CrossRefGoogle Scholar
- Seitz F, Rosenfeldt RR, Storm K, Metreveli G, Schaumann GE, Schulz R, Bundschuh M (2015) Effects of silver nanoparticle properties, media pH and dissolved organic matter on toxicity to Daphnia magna. Ecotox Environ Safe 111:263–270. https://doi.org/10.1016/j.ecoenv.2014.09.031 CrossRefGoogle Scholar
- Silva T, Pokhrel LR, Dubey B, Tolaymat TM, Maier KJ, Liu X (2014) Particle size, surface charge and concentration dependent ecotoxicity of three organo-coated silver nanoparticles: comparison between general linear model-predicted and observed toxicity. Sci Total Environ 468–469:968–976. https://doi.org/10.1016/j.scitotenv.2013.09.006 CrossRefGoogle Scholar
- Yuan X, Setyawati MI, Tan AS, Ong CN, Leong DT, Xie J (2013) Highly luminescent silver nanoclusters with tunable emissions: cyclic reduction–decomposition synthesis and antimicrobial properties. Npg Asia Mater 5:e39. https://doi.org/10.1038/am.2013.3 https://www.nature.com/articles/am20133#supplementary-information CrossRefGoogle Scholar