TY - JOUR
T1 - Superhydrophobic Copper Foam Modified with n-Dodecyl Mercaptan-CeO2Nanosheets for Efficient Oil/Water Separation and Oil Spill Cleanup
AU - Gao, Ruixi
AU - Liu, Xiang
AU - Zhang, Tian C.
AU - Ouyang, Like
AU - Liang, Ying
AU - Yuan, Shaojun
N1 - Funding Information:
The authors appreciate the funds granted by the National Natural Science Foundation of China (21676169 and 21978182), the measurement of SEM, XRD, and Raman spectra by the Institute of New Energy and Low Carbon Technology of Sichuan University, XPS measurement by Ceshigo Research Service ( http://www.ceshigo.com ), and the FTIR by the Engineering Teaching Center, School of Chemical Engineering, Sichuan University.
Publisher Copyright:
©
PY - 2020/12/9
Y1 - 2020/12/9
N2 - Efficient separation of oil/water with a simple and low-cost method is of great importance for the treatment of oily wastewater. In the current study, a facile one-step electrodeposition method was used to fabricate highly dense CeO2 nanostructures on copper foam at a constant current density of 1.5 mA·cm-2 for 20 min, which exhibited excellent superhydrophobicity and superlipophilicity after surface modification with n-dodecyl mercaptan (NDM). The electrodeposition current density and time were systematically investigated to uncover influencing factors of the growth process of CeO2 nanostructures on the copper foam. The as-fabricated superhydrophobic foams could not only be used to efficiently separate oil/water mixtures with a separation efficiency greater than 97.4% but also presented robustness and high stability against 3.5 wt % NaCl solution and 600-grit sandpaper abrasion. Furthermore, the as-prepared sample still maintains a high separation efficiency at circa 97.5% after more than 25 times of recovery for kerosene/water mixture separation. In addition, the as-prepared three-dimensional cassette structure made of superhydrophobic copper foam could float freely on the water surface for fast in situ collection of oil from the water surface, indicating application potential in offshore oil spill treatment and cleanup.
AB - Efficient separation of oil/water with a simple and low-cost method is of great importance for the treatment of oily wastewater. In the current study, a facile one-step electrodeposition method was used to fabricate highly dense CeO2 nanostructures on copper foam at a constant current density of 1.5 mA·cm-2 for 20 min, which exhibited excellent superhydrophobicity and superlipophilicity after surface modification with n-dodecyl mercaptan (NDM). The electrodeposition current density and time were systematically investigated to uncover influencing factors of the growth process of CeO2 nanostructures on the copper foam. The as-fabricated superhydrophobic foams could not only be used to efficiently separate oil/water mixtures with a separation efficiency greater than 97.4% but also presented robustness and high stability against 3.5 wt % NaCl solution and 600-grit sandpaper abrasion. Furthermore, the as-prepared sample still maintains a high separation efficiency at circa 97.5% after more than 25 times of recovery for kerosene/water mixture separation. In addition, the as-prepared three-dimensional cassette structure made of superhydrophobic copper foam could float freely on the water surface for fast in situ collection of oil from the water surface, indicating application potential in offshore oil spill treatment and cleanup.
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U2 - 10.1021/acs.iecr.0c04515
DO - 10.1021/acs.iecr.0c04515
M3 - Article
AN - SCOPUS:85097832955
SN - 0888-5885
VL - 59
SP - 21510
EP - 21521
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 49
ER -