Rapid preparation of micro/nano porous Cu/Cu2O particles through dealloying of powder sintered Cu-Al alloy

• Published in: Materials characterization Vol. 204; p. 113175
• Main Authors: Yu, Yong, Cai, Xiaoping, Shang, Zhichao, Yu, Yang, Wang, Xiaohong, Feng, Peizhong
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.10.2023
• Subjects: Cu/Cu2O; Dealloying corrosion; Micro/nano porous particles; Powder sintering; Cu/Cu2O; Powder sintering; Dealloying corrosion; Micro/nano porous particles
• ISSN: 1044-5803; 1873-4189
• DOI: 10.1016/j.matchar.2023.113175

Three-dimensional (3D) continuous micro/nano porous Cu/Cu2O (MNPC) particles that were difficult to obtain before were prepared. With the combination of rapid powder sintering and dealloying, when Al element is corroded, the particles can control the corrosion intensity through self shedding, to obtain bimodal pore size micron particles. The composition calculation and nano-ligament structure showed that C17A with eutectic point composition and particle morphology is conducive to obtaining complete microparticles. Complete particles with micropores for material exchange and nanopores for pollutant degradation will greatly improve the degradation rate. Therefore, in the dark ultrasonic environment, the addition of 120 °C oxidation for one hour of MNPC will increase the degradation efficiency of MO from 1.4% to 86% within 10 min. [Display omitted] •The complete micro/nano porous particles were prepared by rapid powder sintering and dealloying.•The effect of phase change of different Cu-Al compositions on dealloying was studied.•The self-shedding of sample particles controls the dealloying reaction process.•After oxidation, the degradation rate of MO by MNPC reached 86% within 10 min.