Jia Wang , Yingsheng Li , Yao Wang , Tong Liu , Mingyue Ding
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引用次数: 0
Abstract
Seawater desalination via the solar membrane distillation (SMD) technology is an effective way to solve the fresh water shortage, and it is very important to prepare a Janus membrane with excellent solar desalination properties to improve the water permeability. In this work, three typical hydrophobic carbon nanotubes/hydrophilic fly ash (CNTs/FA) Janus asymmetric membranes with different membrane support structures are prepared for SMD application by the conventional tape casting or phase inversion tape casting techniques. It is demonstrated that nitrogen permeability is significantly enhanced from (4.81 ± 0.17) × 105 L m-2 h-1 bar-1 for the tortuous CNTs/FA Janus membrane to (9.28 ± 0.10) × 106 L m-2 h-1 bar-1 for the hierarchically oriented CNTs/FA Janus membrane with open, straight pores by manipulating the microstructure of the FA membrane support. Moreover, the corresponding evaporation rate is strongly increased from 0.633 ± 0.010 to 1.669 ± 0.010 kg m-2 h-1, which is greatly ascribed to the accelerated water permeation in the hierarchically oriented FA membrane support with open, straight pores. Additionally Our findings proves that the SMD performance can be greatly improved by the microstructure manipulation of the membrane support, and guide the development of novel membranes for efficient solar desalination.
期刊介绍:
Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties.
Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour.
Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.