A green and facile synthesis route of nanosize cupric oxide at room temperature

• Published in: Nanotechnology reviews (Berlin) Vol. 13; no. 1; pp. 12425 - 37
• Main Authors: Niu, Yongsen, Xu, Boren, Yi, Xin, Wang, Xi, Yi, Chunwang
• Format: Journal Article
• Language: English
• Published: Berlin De Gruyter 28.08.2024; Walter de Gruyter GmbH
• Subjects: antibacterial; Aqueous solutions; Caustic soda; Clean energy; controllable size; Copper; Copper oxides; Dehydration; E coli; Energy consumption; Fiber composites; Fourier transforms; Gram-positive bacteria; green synthesis; Methanol; methanol recycle; Methods; nano-CuO; Polyamide resins; Polyamides; Room temperature; Sodium; Sodium hydroxide; Sodium sulfate
• ISSN: 2191-9097; 2191-9089; 2191-9097
• DOI: 10.1515/ntrev-2024-0070

Heat, ultrasonic, microwave, and external energy are the essential conditions in the conventional preparation of nano-cupric oxide (CuO) from copper hydroxide (Cu(OH) ) precursor. In this work, CuSO aqueous solution (0.02 mol) was gradually added dropwise into the methanol/sodium hydroxide (NaOH/CH OH) solution (0.04 mol) in 20 min at normal temperature and then constantly stirred the black solution for about 5 min; nano-CuO was synthesized. The as-prepared CuO had a high purity and a regular nanosize of 4–10 nm. What is more, the by-product sodium sulfate (Na SO ) could be separated using a high-speed centrifuge, indicating that the methanol could be conveniently recycled; thereby, an environmentally friendly sustainable route of the preparation of nano-CuO was developed. In addition, the as-prepared nano-CuO was melt-compounded with polyamide 6 to produce fiber composites. The results showed that the nano-CuO was uniformly dispersed in PA6 fiber composites and presented an excellent antibacterial performance. Most importantly, the function of methanol in the dehydration process was revealed.