Exfoliated Bi2Te3-enabled membranes for new concept water desalination: Freshwater production meets new routes

被引：11

作者：

Frappa, M. ^{[1
]}

Castillo, A. E. Del Rio ^{[2
]}

Macedonio, F. ^{[1
]}

Di Luca, G. ^{[1
]}

Drioli, E. ^{[1
,3
]}

Gugliuzza, A. ^{[1
]}

机构：

[1] Natl Res Council CNR ITM, Res Inst Membrane Technol, Via Pietro Bucci 17C, I-87036 Arcavacata Di Rende, CS, Italy

[2] Fdn Ist Italiano Tecnol, Graphene Labs, Via Morego 3016163, Genoa, Italy

[3] Univ Calabria, Dept Environm & Chem Engn, Via Pietro Bucci, I-87036 Arcavacata Di Rende, CS, Italy

来源：

WATER RESEARCH | 2021年 / 203卷

关键词：

Freshwater; Water desalination; Membrane distillation; Bismuth telluride; 2D materials; PVDF membrane; PVDF MEMBRANES; THERMAL EFFICIENCY; TOPOLOGICAL INSULATORS; DISTILLATION; GRAPHENE; BI2SE3; ENERGY; BI2TE3; CRYSTALS; FUTURE;

D O I：

10.1016/j.watres.2021.117503

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Water scarcity forces the science to find the most environmentally friendly propulsion technology for supplying plentiful freshwater at low energy costs. Membrane Distillation well meets criteria of eco-friendly management of natural resources, but it is not yet competitive on scale. Herein, we use a dichalchogenide compound (Bi2Te3) as a conceivable source to accelerate the redesign of advanced membranes technologies such as thermally driven membrane distillation. A procedure based on assisted dispersant liquid phase exfoliation is used to fill PVDF membranes. Key insights are gained in the crucial role of this topological material confined in hydrophobic membranes dedicated to recovery of freshwater from synthetic seawater. Intensified water flux together with reduced energy consumption is obtained into one pot, thereby gathering ultrafast production and thermal efficiency in a single device. Bi2Te3-enabled membranes show ability to reduce the resistance to mass transfer while high resistance to heat loss is opposite. Permeate flux is kept stable and salt rejection is higher than 99.99% during 23 h-MD test. Our results confirm the effectiveness of chalcogenides as frontier materials for new-concept water desalination through breakthrough thermally-driven membrane distillation, which is regarded as a new low-energy and sustainable solution to address the growing demand for access to freshwater.

引用

页数：10

共 67 条

[1] PVDF membranes containing reduced graphene oxide: Effect of degree of reduction on membrane distillation performance [J].