Abstract
In the ultrasonic field, stable silver colloids were produced by the reduction of AgNO3 with the protection of PVP using KBH4 or N2H4·H2O as reductant. The main factors affecting the morphology of silver nanoparticles, such as distribution of the ultrasonic field, ultrasonic time, ultrasonic power, and the species of reductant, were studied. The silver colloids were identified by TEM and spectrophotometry. The results indicate that the factors such as distribution of the ultrasonic field, ultrasonic time, ultrasonic power, and the species of reductant have a great impact on the morphology of the silver nanoparticles. The size of the silver nanoparticles decreases with the ultrasonic power and ultrasonic time increasing. Ag nanoparticles prepared in standing wave field preferentially grow in a certain direction, which is propitious for forming hexagonal-and spherical-like silver nanoparticles. Monodispersed spherical silver nanoparticles are easily synthesized in the diffusion field. The stability of silver colloid becomes improved by ultrasonic treatment. For example, precipitate is not found after several weeks for the silver colloid prepared with an ultrasonic treatment time of 180 min. The silver nanoparticles prepared without ultrasonic treatment are large spherical-like and hexagonal. Well-dispersed spherical silver particles with a mean size of about 20 nm have been prepared under ultrasonic treatment. Spherical, spherical-like, and hexagonal silver nanoparticles can be obtained by changing the reductants.
Similar content being viewed by others
References
Zhao Bin, Yao Mingyi, Zhang Zongtao, Hu Liming, Research on controlling the silver particle size in colloidal dispersions of ultrafine silver particles, Petroleum Chemical Technology, 1996, 25: 159–163 (in Chinese)
Huang Lizhong, Wang Ying, Wang Yongli, Colloidal precious metals and its application, Precious Metals, 1997, 18(3): 58–62 (in Chinese)
Zhao Bin, Yao Mingyi, Wen Dong, Hu Liming, Preparation and electric conductivity of ultrafine silver particles with polymer-protected colloidal dispersions, Journal of East China University of Science and Technology, 1995, 21: 428–434 (in Chinese)
Guo Lijun, Yu Juanjuan, Li Yuncai, Gu Yuzong, Huang Yabin, Mo Yujun, Absorption tropism of PNBA on silver nanoparticles surface, Chinese Science Bulletin, 2000, 45: 571–574 (in Chinese)
Li Degang, Chen Shenhao, Zhao Shiyong, Wang Chuntao, Production of the monolayer of Ag nanoparticles by phase transfer ring, Acta Chemica Sinica, 2002, 60: 408–412 (in Chinese)
Chou Kansen, Ren Chiangyuh, Synthesis of nanosized silver particles by chemical reduction method, Material Chemistry and Physics, 2000, 64: 241–246
Tan Yiwei, Li Yongfang, Zhu Daoben, Preparation of silver nanocrystals in the presence of anline, Journal of Colloid and Interface Science, 2002, 258: 244–251
Zhou Yong, Yu Shu H, Wang Cui Y, Li X. G., Zhu Y. R., Chen Y. C., A novel ultraviolet irradiation photoreduction technique for the preparation of single-crystal Ag nanorods and Ag dendrites, Adv. Mater., 1999, 10:850–852
Jin Rongchao, Cao Yunwei, Mirkin, Chad A., Kelly K.L., Schatz, George C., Zheng J.G., Photoinduced conversion of silver nanospheres to nanoprisms, Science, 2001, 294(30): 1901–1903
Deng Shiyan, Xing Weihong, Xu Nanping. Influence of ultrasonic field on the zirconium sol preparation, Journal of Nanjing University of Technology, 2003, 25: 80–83 (in Chinese)
Li Tingsheng, Yin Qiguang. Sonochemistry, Beijing: Science Press, 1995, 38–39 (in Chinese)
Author information
Authors and Affiliations
Corresponding author
Additional information
__________
Translated from Journal of Tianjin University, 2006, 39(1) (in Chinese)
About this article
Cite this article
Cheng, J., Yao, S., Zhang, W. et al. Preparation and characterization of silver colloids with different morphologies under ultrasonic field. Front. Chem. China 1, 418–422 (2006). https://doi.org/10.1007/s11458-006-0067-0
Issue Date:
DOI: https://doi.org/10.1007/s11458-006-0067-0