The intercalation of nanoscale lattices into micro-sized graphene oxide sheets for enhancing pressure-driven desalination performances

被引：33

作者：

Yu, Hao ^{[1
,2
,3
]}

Xiao, Guoqing ^{[2
]}

He, Yi ^{[1
,2
]}

Fan, Yi ^{[1
,4
]}

Mei, Xue ^{[1
,5
]}

Li, Hongjie ^{[1
,2
]}

Chen, Guanyu ^{[3
]}

Ma, Jing ^{[1
,2
]}

Ou, Jian Zhen ^{[3
,6
]}

机构：

[1] Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Sichuan, Peoples R China

[2] Southwest Petr Univ, Coll Chem & Chem Engn, Chengdu 610500, Sichuan, Peoples R China

[3] Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Technol Mat, Minist Educ, Chengdu 610031, Peoples R China

[4] Chengdu Graphene Applicat Inst Ind Technol, Chengdu 611130, Sichuan, Peoples R China

[5] Petrochina Southwest Oil & Gas Field Co, Northwest Div, Jiangyou 621700, Sichuan, Peoples R China

[6] RMIT Univ, Sch Engn, Melbourne, Vic 3000, Australia

来源：

DESALINATION | 2021年 / 500卷

基金：

中国国家自然科学基金;

关键词：

Graphene oxide; Size; Membrane; Water purification; Desalination; Cation-pi interaction; COMPOSITE NANOFILTRATION MEMBRANES; SEAWATER DESALINATION; WATER PERMEATION; REDUCTION DEGREE; TRANSPORT; PERMEABILITY; TECHNOLOGIES; FABRICATION; LIQUID; FUTURE;

D O I：

10.1016/j.desal.2020.114868

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Graphene oxide based nanofiltration membranes (GONMs) have attracted tremendous attention for water purification applications given their excellent mechanical properties and tunable inter-layer distance spacing (Dspacing). However, the desalination performance is significantly degraded in the pressure-driven filtration. In this work, we find that the pressure-driven water desalination properties are nanochannel spacing and length dependent, in which the cation-pi interaction possibly plays a critical factor in the desalination procedure. Through the demonstration of surface weak-reduction and membrane thickness tuning, the D-spacing and molecule transport route length of GONMs are identified to affect the quality and quantity of cation-pi interaction, respectively, which are innovatively regulated by the intercalation of nano-sized lattices into large GO sheets. As a result, the regulated membrane improves the rejection rates of MgCl2, NaCl, MgSO4 and Na2SO4 up to 41.10%, 64.14%, 84.62% and 93.19%, respectively, compared to unregulated counterparts of 13.72%, 15.93%, 34.58% and 40.99%, respectively. In addition, the regulated membrane also exhibits excellent removal efficiency of >93% against tested dyes with different molecular weight and surface charge properties. We consider that our approach could lead to the development of a powerful GONMs based platform for future water treatment.

引用

页数：10