2D Heterostructure Membranes with Sunlight-Driven Self-Cleaning Ability for Highly Efficient Oil-Water Separation

被引：247

作者：

Liu, Yanan ^{[1
,2
]}

Su, Yanlei ^{[1
,2
]}

Guan, Jingyuan ^{[1
,2
]}

Cao, Jialin ^{[1
,2
]}

Zhang, Runnan ^{[1
,2
]}

He, Mingrui ^{[1
,2
]}

Gao, Kang ^{[1
,2
]}

Zhou, Linjie ^{[1
,2
]}

Jiang, Zhongyi ^{[1
,2
]}

机构：

[1] Tianjin Univ, Sch Chem Engn & Technol, Minist Educ, Key Lab Green Chem Technol, Tianjin 300072, Peoples R China

[2] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2018年 / 28卷 / 13期

关键词：

0D/2D heterojunctions; 2D heterostructure membranes; graphene oxide nanosheets; oil/water separation; sunlight-driven self-cleaning; VISIBLE-LIGHT PHOTOCATALYSIS; GRAPHITIC CARBON NITRIDE; OIL/WATER SEPARATION; ULTRAFAST SEPARATION; NANOHYBRID MEMBRANE; SURFACE SEGREGATION; NETWORK FILMS; FLUX; NANOCOMPOSITES; PURIFICATION;

D O I：

10.1002/adfm.201706545

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Introducing solar energy into membrane filtration to decrease energy and chemicals consumption represents a promising direction in membrane fields. In this study, a kind of 0D/2D heterojunction is fabricated by depositing biomineralized titanium dioxide (TiO2) nanoparticles with delaminated graphitic carbon nitride (g-C3N4) nanosheets, and subsequently a kind of 2D heterostructure membrane is fabricated via intercalating g-C3N4@TiO2 heterojunctions into adjacent graphene oxide (GO) nanosheets by a vacuum-assisted self-assembly process. Due to the enlarged interlayer spacing of GO nanosheets, the initial permeation flux of GO/g-C3N4@TiO2 membrane reaches to 4536 Lm(-2) h(-1) bar(-1), which is more than 40-fold of GO membranes (101 Lm(-2) h(-1) bar(-1)) when utilized for oil/water separation. To solve the sharp permeation flux decline, arising from the adsorption of oil droplets, the a sunlight-driven self-cleaning process is followed, maintaining a flux recovery ratio of more than 95% after ten cycles of filtration experiment. The high permeation flux and excellent sunlight-driven flux recovery of these heterostructure membranes manifest their attractive potential application in water purification.

引用

页数：10

共 47 条

[1]

ARNOLD R., 2004, OILFIELD REV, V16, P26

[2] Visible-light photocatalysis in nitrogen-doped titanium oxides [J].