Mesoporous polymers:soft-template self-assembly synthesis and applications

Mesoporous polymers combine the advantages of polymer materials(abundant polar functional groups,lightweight,flexibility,and processability)and mesoporous structures(high specific surface area,adjustable pore structure,and large pore volume);hence,they have great application potential in sensing,adsorption,catalysis,energy storage,biomedicine,etc.Currently,developing advanced synthetic strategies for mesoporous polymers and investigating their intrinsic applications have become hot research topics.Soft-template-based self-assembly is regarded as a promising approach for synthesizing mesoporous polymers.This work reviews recent progress in the synthetic strategy for producing various mesoporous polymers using soft-template selfassembly,focusing on the synthesis of conductive polymers,phenol-based polymers,and resin-based polymers and their potential applications.Finally,perspectives on future applications of mesoporous polymers,along with a few challenges that need to be resolved,are also discussed in this review.

Sustainable method towards magnetic ordered mesoporous polymers for efficient Methylene Blue removal

The difficulty in achieving high removal efficiency for contaminants in textile wastewater over a wide range of p H impedes the progress of its treatment technique greatly.Herein,a facile and sustainable strategy was adopted for constructing magnetic ordered mesoporous polymers(M-OMPs)without the assistance of organic solvent and catalyst.The prepared M-OMPs were endowed with high special surface area and good superparamagnetism simultaneously,and exhibited high removal efficiency(>99%)for Methylene Blue(MB)within a short time(10 min)at a concentration of 50 mg/L.What’s more,high removal efficiency was achieved over a wide range of p H 2-12 and the adsorption capacity for MB on M-OMPs was substantially retained even after 5 adsorption-desorption cycles,further demonstrating the application potential of M-OMPs in the decontamination of textile wastewater.

Surfactant-templating of Ordered Mesoporous Polymers and Carbons

1 Results Ordered mesoporous materials possess enormous potential for many high-tech applications[1] such as bioreactors, microelectrophoresis, thermal insulation and catalysts. In general, organic porous materials can be prepared by phase-separation and hard templating approach such as those employing colloidal particles[2]. However, due to the volume contraction and swelling, and the structured defects formed during template removal, most of the resulting porous polymer structures are disordered with ...

Hollow Bio-derived Polymer Nanospheres with Ordered Mesopores for Sodium-Ion Battery

Bio-inspired hierarchical self-assembly provides elegant and powerful bottom-up strategies for the creation of complex materials.However,the current self-assembly approaches for natural bio-compounds often result in materials with limited diversity and complexity in architecture as well as microstructure.Here,we develop a novel coordination polymerization-driven hierarchical assembly of micelle strategy,using phytic acid-based natural compounds as an example,for the spatially controlled fabrication of metal coordination bio-derived polymers.The resultant ferric phytate polymer nanospheres feature hollow architecture,ordered meso-channels of^12 nm,high surface area of 401 m2 g−1,and large pore volume of 0.53 cm3 g−1.As an advanced anode material,this bio-derivative polymer delivers a remarkable reversible capacity of 540 mAh g−1 at 50 mA g−1,good rate capability,and cycling stability for sodium-ion batteries.This study holds great potential of the design of new complex bio-materials with supramolecular chemistry.

Fabrication and application of hierarchical mesoporous MoO2/Mo2C/C microspheres

Hierarchical mesoporous MoO2/Mo2C/C microspheres,which are composed of primary nanoparticles with a size of about 30 nm,have been designed and synthesized through polymer regulation and subsequent carbonization processes.The as-synthesized microspheres were characterized by XRD,Raman,SEM,TEM,XPS measurements and so on.It was found that polyethylene glycol acted as a structure-directing agent,mild reducing agent and carbon source in the formation of these hierarchical mesoporous Mo O2/Mo2C/C microspheres.Moreover,the electrochemical property of the microspheres was also investigated in this work.Evaluated as an anode material for lithium ion batteries,the hierarchical mesoporous Mo O2/Mo2C/C electrode delivered the discharge specific capacities of 665 and 588 m Ah/g after 100 cycles at current densities of 100 and 200 m A/g,respectively.The satisfactory cycling performance and controllable process facilitate the practical applications of the hierarchical mesoporous Mo O2/Mo2C/C as a potential anode material in high-energy density lithium-ion batteries.

紫精基离子型共轭微孔聚合物作为电子传输泵用于高效多硫化物捕获和转化

The commercialization of lithium-sulfur(Li-S)batteries has been hindered by the shuttle effect and sluggish redox kinetics of lithium polysulfides(LiPSs).Herein,we reported a viologen-ba sed ionic conjugated mesoporous polymer(TpV-Cl),which acts as the cathode host for modifying Li-S batteries.The viologen component serves as a reversible electron conveyer,leading to a comprehensive enhancement in the adsorption of polysulfides and improved conversion rate of polysulfides during the electrochemical process.As a result,the S@TpV-PS cathode exhibits outstanding cycling performance,achieving 300 cycles at2.0 C(1 C=1675 mA g^(-1))with low decay rate of 0.032%per cycle.Even at a high sulfur loading of 4.0 mg cm^(-2),S@TpV-PS shows excellent cycling stability with a Coulombic efficiency of up to 98%.These results highlight the significant potential of S@TpV-PS in developing high-performance Li-S batteries.

Construction of mesoporous ceria-supported gold catalysts with rich oxygen vacancies for efficient CO oxidation

Bearing unique redox nature and high oxygen storage capacity,ceria(CeO_(2))has always been a promising CO oxidation catalyst support for gold(Au)catalysts and the like.Herein,a series of Au-CeO_(2)-P(P stands for pH value)samples was prepared by a co-precipitation method with the assistance of an alkaline environment and amino groups functionalized ordered mesoporous polymer(OMP-NH_(2)).Afterward,all samples described above were characterized that the Au-CeO_(2)-P catalysts are made of Au-Ce-O solid solution and Au nanoparticles(NPs)supported on CeO_(2).It turns out that OMP-NH_(2) is not just a simple sacrificial template for mesoporous structure,but also plays an important role as an amino source,explaining the presence of rich oxygen vacancies.Due to the concentration of oxygen vacancies in Au-Ce-O solid solution is the key factor for the oxygen mobility of CO oxidation,the catalytic results also demonstrate that the catalytic activity of Au-CeO_(2)-P catalysts is related to the concentration of their oxygen vacancies.Moreover,Au-CeO_(2)-9.6 with a highest concentration of oxygen vacancies(as high as 13.98%)in Au-CeO_(2)-P catalysts exhibits the best catalytic activity(complete conversion at 10℃).

P(VPBA-DMAEA) as a pH-sensitive nanovalve for mesoporous silica nanoparticles based controlled release

A pH-sensitive controlled release system was proposed in this work, which consists of mesoporous silica nanoparticles（MSNs） functionalized on the pore outlets with poly（4-vinylphenybronic acid-co-2-（dimethylamino）ethyl acrylate） [P（VPBA-DMAEA）]. Four kinds of P（VPBA-DMAEA）-gated MSNs were synthesized and applied for the p H-sensitive controlled release. The results showed that P（VPBADMAEA） can work as a p H-sensitive nanovalve. The release behavior of the hybrid nanoparticles could be adjusted by changing the mole ratio of VPBA and DMAEA. With the increasing of the mole ratio of VPBA,the leakage of the entrapped molecules in the pores of MSNs could be decreased at neutral and alkaline conditions. By altering the p H of buffer from 4.0 to 8.0, the valve could be switched ‘‘on＇＇ and ‘‘off＇＇reversibly. In addition, cells viability results indicated that these P（VPBA-DMAEA）-gated MSNs had good biocompatibility. We believe that these MSNs based p H-sensitive controlled release system will provide a promising nanodevice for sited release of drug delivery.