Interface-confined surface engineering constructing water-unidirectional Janus membrane

Yang, Xiaobin; Yan, Linlin; Ran, Feitian; Pal, Avishek; Long, Jun; Shao, Lu

doi:10.1016/j.memsci.2019.01.014

Cited by 96 publications

(39 citation statements)

References 51 publications

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“…In this way, the modification depth could be controlled to some extent via the deposition time. [ 49 ] The modifiers used for the single‐side interface‐confined modification include dopamine, [ 49–59 ] hydroxyapatite, [ 60 ] catechol, [ 61 ] starch paste, [ 62 ] KOH solution, [ 63,64 ] 1H,1H,2H,2H‐perfluorodecyltriethoxysilane, [ 65 ] octadecylamine, [ 66 ] fluoropolymer emulsion foam, [ 67 ] paraffin, [ 68 ] polydimethylsiloxane, [ 69 ] and TiO 2 nanoparticle slurry. [ 70 ] Note that the prerequisite of this method is that the membrane surface should be nonwettable to the modifier solution for ensuring a nonuniform modification.…”

Section: Asymmetric Surface Construction and Regulation For Janus Memmentioning

confidence: 99%

“…[ 70 ] Note that the prerequisite of this method is that the membrane surface should be nonwettable to the modifier solution for ensuring a nonuniform modification. [ 49–70 ] It is thus not suitable for the wettable system because the modification solution would easily penetrate through membrane pores due to capillary effect, leading to an indiscriminate decoration on both sides. This substrate‐dependent issue could be addressed to some extent through the single‐side spraying technique.…”

Section: Asymmetric Surface Construction and Regulation For Janus Memmentioning

confidence: 99%

“…As the liquid gradually diffuses along the membrane pores, it has been found that the modification thickness is increased over time. [ 49,50,52,65,66,103,104 ] However, the reproducibility of the thickness control is relatively low and the exact relationship between the modification depth and time is still unclear. For the energy irradiation induced postmodification, the energy gradient along the membrane thickness would be easily disturbed by intrinsic properties of membrane such as transparency, refractive index, pore morphology, and porosity, reducing the controllability on the modification depth.…”

Section: Asymmetric Surface Construction and Regulation For Janus Memmentioning

confidence: 99%

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Asymmetric Surface Engineering for Janus Membranes

Yang

2020

Adv Materials Inter

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Emerging Janus membranes, named after the ancient Roman god with two faces to better survey both the past and the future, are appealing materials to tackle this challenge. They possess opposing chemicophysical properties on two sides for achieving a breakthrough in their performances. [12] The opposite surface properties usually include asymmetric wettability and charge but not limited to them. [13] Janus membranes with asymmetric wettable surfaces have received most of the attention in diverse research fields for a wide variety of applications because of their distinctive mass (e.g., liquid or gas) transport behaviors in two-phase or multiphase systems. Such unique fluid transportation relies on the cooperative effect arisen from the asymmetric wettability in the direction of membrane thickness. [14] Therefore, how to create and regulate asymmetry is a core task in the preparation of Janus membranes.Surface engineering, a process for modifying the surface of a material, provides a powerful toolbox to enhance and optimize the performance of the material, especially for porous membranes with large internal surface area. A myriad of modification methods including surface coating, grafting, and self-assembling have been developed to regulate membrane surface properties which are usually uniform in the spatial distribution. As distinguished from ordinary surface treatments, asymmetric surface engineering aims to accurately control the uneven distribution of surface properties or functionalities in the direction of membrane thickness, being an effective means for the preparation of Janus membranes.Benefiting from the asymmetric surface engineering, the researches on Janus membranes have mushroomed in recent years. Hundreds of literatures have explored the possibilities for Janus membranes to substitute traditional ones for achieving enhanced performances in the mass transfer between two phases, including water−oil, water−gas, and oil−gas systems. Some researchers have reviewed the research progresses on Janus membranes from different perspectives. Our previous review has discussed the definition and fabrication of Janus membranes and summarized their applications in the field of environmental science. [13] Another two reviews, presented by Zhao et al. [14] and Zhou et al., [15] have described the distinctive unidirectional fluid transport phenomenon of Janus membranes and their functional applications. Besides, a recent review has detailed the potential of Janus configuration in terms of enhancing energy efficiency in membrane processes. [12] However, the vital role of asymmetric surface engineering in the construction of asymmetric configurations, the modulation of surface properties, and the implementation of ultimate applications has not been addressed. Herein, Janus membranes show great promise toward various applications and are undergoing a fast-paced development in materials science. The asymmetric surface engineering on surface wettability, layer thickness, and pore structure enables Janus membranes with super...

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Section: Asymmetric Surface Construction and Regulation For Janus Memmentioning

confidence: 99%

Section: Asymmetric Surface Construction and Regulation For Janus Memmentioning

confidence: 99%

Section: Asymmetric Surface Construction and Regulation For Janus Memmentioning

confidence: 99%

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Asymmetric Surface Engineering for Janus Membranes

Yang

2020

Adv Materials Inter

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“…With the rapid development of industry, materials, energy, printing and agriculture, a large amount of sewage and other pollutants is directly discharged without being purified or purification treatment . This fails to meet the discharge standards and causes severe damages to the water environment.…”

Section: Introductionmentioning

confidence: 99%

Research Progress in the Field of Adsorption and Catalytic Degradation of Sewage by Hydrotalcite‐Derived Materials

Pan

Tian

et al. 2019

The Chemical Record

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With the rapid development of industry and agriculture and the greatly improved living conditions, the resultant gradually deteriorated environments threaten the human beings. Refractory or even toxic pollutants, which are from different industries such as printing and dyeing, pesticides, chemicals, petrochemicals, plastics and rubber, seriously threat the ecosystems and human health. Having the advantages of flexible composition, unique structure, high stability, memory effect, easy preparation and low cost, hydrotalcite compounds have a great potential in sewage degradation and environmental protection. This study focuses on the adsorption and catalytic properties (such as photocatalysis, electrocatalysis and photoelectrocatalysis) of hydrotalcite-derived materials for treating organic, inorganic and heavy metal ion sewage. The types of adsorption and catalysis, and the effects of various influencing factors on the degradation efficiency were discussed as well.Wiley Online Library 355 Figure 13. The photoelectrocatalytic mechanism of organic pollutant MB over the ZNI-1-MMO-1.5 V photoelectrode.

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“…Janus material [43][44][45][46] refers to the two chemical compositions in which has a clear partition structure in the same system, and thus has a dual nature such as hydrophilic/hydrophobic, [47] polar/nonpolar, [48] etc, and Janus material can easily realize special functions and applications through the synergistic interactions of asymmetric surface properties. [49,50] The special Janus structure is capable of reducing the detrimental effects among different materials by restricting them in their own domains on the microscopic level. Therefore, investigation on Janus material including one-dimensional (1D), two-dimensional (2D) and three-dimensional (3D) has become an important research direction of multifunctional materials science.…”

Section: Introductionmentioning

confidence: 99%

Assembling 1D and Janus Nanobelts into 2D Aeolotropic Conductive Janus Membranes and 3D Double‐Walled Janus Tubes

Xie

et al. 2019

ChemNanoMat

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Two‐dimensional (2D) stratified Janus membranes (denoted as SJM) with double aeolotropic electrical conduction and simultaneous magnetism and fluorescence have been designed and constructed via electrospinning by using one‐dimensional (1D) nanobelts and Janus nanobelts as building blocks. The SJM is composed of two layers tightly bonded together. The top layer is a left‐right structured Janus membrane, the left part and right part possess aeolotropic electrical conduction, and the conductive directions are vertical, leading to double aeolotropic conduction. Moreover, red and green fluorescence in the two parts occurs under UV irradiation. The bottom layer is a non‐array magnetic membrane. By rolling the 2D SJM into a tube, either from left to right or top to bottom, three‐dimensional (3D) double‐walled Janus tubes with the Janus tube and the isotropic tube on the exterior and interior of the tube are obtained. The novel 3D double‐walled Janus tubes exhibit the same excellent performance as the 2D SJM. Thus, the structural transition from 1D nanobelts and Janus nanobelts utilized as building units to 2D double aeolotropic conductive Janus membrane then to 3D Janus tube is successfully realized.

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Interface-confined surface engineering constructing water-unidirectional Janus membrane

Cited by 96 publications

References 51 publications

Asymmetric Surface Engineering for Janus Membranes

Asymmetric Surface Engineering for Janus Membranes

Research Progress in the Field of Adsorption and Catalytic Degradation of Sewage by Hydrotalcite‐Derived Materials

Assembling 1D and Janus Nanobelts into 2D Aeolotropic Conductive Janus Membranes and 3D Double‐Walled Janus Tubes

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