Abstract: Owing to its unique physical and chemical properties, the graphene oxide (GO)has recently received fairly extensive attention in the application of water treatment. However, the membrane by pure GO layer-by-layer self-assembling is practically limited due to its lower separation efficiency of divalent cation. In this paper, a novel membrane has been prepared by grafting polyaniline (PANI) on a GO membrane to overcome the above mentioned defect. The performance of GO and PANI/GO composite membranes was investigated and compared. The results have showed that the membrane composited of PANI and GO has demonstrated a higher water flux and repulsion. The important role of GO loading for composite membranes was shown. When the loading of GO is 150 mg·m-2, a water flux of 214.5 L·m-2·h-1·MPa-1 could be reached for the composite membranes. In terms of heavy metal removal, the retention is over 90% for the tested solutions of CuCl2, ZnCl2, BaCl2, CdCl2 and NiCl2. The excellent separation performance of PANI/GO composite membranes has been mainly assigned to Donnan effect and size exclusion. Therefore, the PANI/GO composite membranes show a good prospect in the application fields of wastewater treatment.
1 Novoselov S K. Science, 2004, 306(5696), 666. 2 Lee C, Wei X, Kysar J W, et al.Science, 2008, 321(5887), 385. 3 Stoller M D, Park S, Zhu Y, et al.Nano Letters, 2008, 8(10), 3498. 4 Song N, Gao X, Ma Z, et al.Desalination, 2018, 437, 59. 5 Nair R R, Wu H A, Jayaram P N, et al.Science, 2012, 335(6067), 442. 6 Chen Y, Yang R T, Tsamatsoulis D, et al.Chemical Physics Letters, 1998, 287(1-2), 53. 7 Yang K, Huang L J, Wang Y X, et al.Nanomaterials, 2020, 10(3), 13. 8 Du Y C, Huang L J, Wang Y X, et al. Journal of Materials Science, 2020, 55(25), 11188. 9 Homaeigohar S, Elbahri M.Npg Asia Materials, 2017, 9(8), e427. 10 An D, Yang L, Wang T J, et al.Industrial Engineering Chemistry Research, 2016, 55, 4803. 11 Cohen-Tanugi D, Grossman J C. Nano Letters, 2012, 12(7), 3602. 12 Zheng S X, Tu Q S, Urban J J, et al.ACS Nano, 2017, 11(6), 6440. 13 Yang J J, Gong D A, Li G H, et al.Advanced Materials, 2018, 30(16), 1705775. 14 Cheng M M, Huang L J, Wang Y X, et al. Journal of Materials Science, 2019, 54(1), 252. 15 Zhang M C, Mao Y Y, Liu G Z, et al.Angewandte Chemie-International Edition, 2020, 59(4), 1689. 16 Han Y, Xu Z, Gao C.Advanced Functional Materials, 2013, 23(29), 3693. 17 Zhang Y, Zhang S, Chung T S.Environmental Science Technology, 2015, 49(16), 10235. 18 Yuan Y, Gao X, Wei Y, et al.Desalination, 2017, 405, 29. 19 Shen Y, Chen B.Environmental Science Technology, 2015, 49(12), 7364. 20 Hummers W S, Offeman R E. American Chemical Society, 1958, 208, 1334. 21 Eda G, Chhowalla M. Advanced Materials, 2010, 22(22), 2392. 22 Wang C Y, Zeng W J, Jiang T T, et al.Separation and Purification Technology, 2019, 214, 21. 23 Guo Y L, Wang T, Chen F H, et al.Nanoscale, 2016, 8(23), 12073. 24 Zou Y B, Zhang Z C, Zhong W B, et al.Journal of Materials Chemistry A, 2018, 6(19), 9245. 25 Wang Y Q, Ou R W, Wang H T, et al.Journal of Materials Science, 2015, 475, 281. 26 Zhang S Y, Liao S Y, Qi F Y, et al.Journal of Hazardous Materials, 2020, 384, 121367. 27 Huang L, Chen J, Gao T T, et al. Advanced Materials, 2016, 28(39), 8669. 28 Majumder M, Chopra N, Hinds B J.ACS Nano, 2011, 5(5), 3867. 29 Joshi R K, Carbone P, Wang F C, et al. Science, 2014, 343(6172), 752. 30 Nam Y T, Choi J, Kang K M, et al.ACS Applied Materials Interfaces, 2016, 8(40), 27376. 31 Jiang X, Cao Y, Li P, et al. Materials Letters, 2015, 140, 43. 32 Huang L, Li Y R, Zhou Q Q, et al.Advanced Materials, 2015, 27(25), 3797. 33 Qi H, Niu S F, Jiang X L, et al.Ceramics International, 2013, 39(3), 2463.