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Journal of Nanomaterials
Volume 2015, Article ID 825021, 8 pages
Research Article

Suspension Synthesis of Surfactant-Free Cuprous Oxide Quantum Dots

1Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China
2National Engineering Lab of Textile Fiber Materials and Processing Technology, Zhejiang Sci-Tech University, Hangzhou 310018, China

Received 20 October 2014; Revised 17 January 2015; Accepted 21 January 2015

Academic Editor: Shou-Yi Kuo

Copyright © 2015 Dongzhi Lai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Suspension methods were used to synthesize surfactant-free Cu2O quantum dots (Cu2O-QDs) in high precursor concentrations using sodium hypophosphite as a reducing agent. Transmission electron microscopy (TEM) observations indicated that a large amount of Cu2O-QDs were synthesized with diameters ranging from 7 to 10 nm. We propose a mechanism where DMSO acts as a surface passivation agent, explaining the possible formation of Cu2O-QDs. Noticeably, the Cu2O-QDs exhibited high and stable catalytic activity for the reduction of rhodamine B.