SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 63 ›› Issue (11): 226-234.DOI: 10.1016/j.cjche.2023.05.011

• Full Length Article • 上一篇    下一篇

Graphene quantum dots doped poly(vinyl alcohol) hybrid membranes for desalination via pervaporation

Yunyun Wan, Lulu Yao, Peng Cui   

  1. 1. School of Chemistry and Chemical Engineering, Hefei University of Technology, China;
    2. Anhui Province Key Laboratory of Controllable Chemical Reaction & Materials Chemical Engineering, Hefei, 230009, China
  • 收稿日期:2023-03-06 修回日期:2023-05-10 出版日期:2023-11-28 发布日期:2024-01-08
  • 通讯作者: Lulu Yao,E-mail:yaolulu166@hfut.edu.cn;Peng Cui,E-mail:Cuipeng@hfut.edu.cn

Graphene quantum dots doped poly(vinyl alcohol) hybrid membranes for desalination via pervaporation

Yunyun Wan, Lulu Yao, Peng Cui   

  1. 1. School of Chemistry and Chemical Engineering, Hefei University of Technology, China;
    2. Anhui Province Key Laboratory of Controllable Chemical Reaction & Materials Chemical Engineering, Hefei, 230009, China
  • Received:2023-03-06 Revised:2023-05-10 Online:2023-11-28 Published:2024-01-08
  • Contact: Lulu Yao,E-mail:yaolulu166@hfut.edu.cn;Peng Cui,E-mail:Cuipeng@hfut.edu.cn

摘要: Pervaporation desalination by highly hydrophilic materials such as poly(vinyl alcohol) (PVA) based separation membrane is a burgeoning technology of late years. However, the improvement of membrane flux in pervaporation desalination has been a difficult task. Here, a novel hybrid membrane with doped graphene oxide quantum dots (GOQDs) which is rich in hydrophilic groups and small size into the matrix of PVA was prepared to improve the membrane flux. The membranes structures were described by field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), Fourier transform infrared (FT-IR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and X-ray diffraction (XRD). And more, Water contact angle, swelling degree, and pervaporation properties were carried out to explore the effect of GOQDs in PVA matrix. In addition, GOQDs content in the hybrid membrane, NaCl concentration, and feed temperature were investigated accordingly. Moreover, the hydrogen bonds between PVA chains were weakened by the interaction between GOQDs and PVA chains. Significantly, the hybrid membrane with optimized doped GOQDs content, 200 mg·L-1, displays a high membrane flux of 17.09 kg·m2·h1 and the salt rejection is consistently greater than 99.6%.

关键词: Pervaporation, Desalination, Graphene oxide quantum dots, Poly(vinyl alcohol), Membranes

Abstract: Pervaporation desalination by highly hydrophilic materials such as poly(vinyl alcohol) (PVA) based separation membrane is a burgeoning technology of late years. However, the improvement of membrane flux in pervaporation desalination has been a difficult task. Here, a novel hybrid membrane with doped graphene oxide quantum dots (GOQDs) which is rich in hydrophilic groups and small size into the matrix of PVA was prepared to improve the membrane flux. The membranes structures were described by field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), Fourier transform infrared (FT-IR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and X-ray diffraction (XRD). And more, Water contact angle, swelling degree, and pervaporation properties were carried out to explore the effect of GOQDs in PVA matrix. In addition, GOQDs content in the hybrid membrane, NaCl concentration, and feed temperature were investigated accordingly. Moreover, the hydrogen bonds between PVA chains were weakened by the interaction between GOQDs and PVA chains. Significantly, the hybrid membrane with optimized doped GOQDs content, 200 mg·L-1, displays a high membrane flux of 17.09 kg·m2·h1 and the salt rejection is consistently greater than 99.6%.

Key words: Pervaporation, Desalination, Graphene oxide quantum dots, Poly(vinyl alcohol), Membranes