Covalent triazine framework-decorated phenyl-functionalised SBA-15: its synthesis and application as a novel nanoporous adsorbent

Marjani

et al. 2020

Sci Rep

Self Cite

The development of easier, cheaper, and more effective synthetic strategies for hierarchical multimodal porous materials and multi-shell hollow spheres remains a challenging topic to utilize them as adsorbents in environmental applications. Here, the hierarchical architecture of multi-shell hollow micro-meso-macroporous silica with pollen-like morphology (MS-HMS-PL) has been successfully synthesized via a facile soft-templating approach and characterized for the first time. MS-HMS-PL sub-microspheres showed a trimodal hierarchical pore architecture with a high surface area of 414.5 m 2 g −1 , surpassing most of the previously reported multishelled hollow nanomaterials. Due to its facile preparation route and good physicochemical properties, MS-HMS-PL could be a potential candidate material in water purification, catalysis, and drug delivery. To investigate the applicability of MS-HMS-PL as an adsorbent, its adsorption performance for Cr(VI) in water was evaluated. Important adsorption factors affecting the adsorption capacity of adsorbent were systematically studied and Kinetics, isotherms, and thermodynamics parameters were computed via the non-linear fitting technique. The maximum capacity of adsorption computed from the Langmuir isotherm equation for Cr(VI) on MS-HMS-PL was 257.67 mg g −1 at 293 K and optimum conditions (pH 4.0, adsorbent dosage 5.0 mg, and contact time 90 min). During the past decades, tremendous progress has been made in the design, synthesis, and application of hierarchical multi-shell hollow micro-meso-macroporous (MS-HM) architectures. These materials possess marvelous features, including low density, large surface area, the void spacing between the shells, high loading capacity, and good desorption performance, which endow them with widespread potential applications in water treatment, drug delivery, supercapacitors, fuel cells, nano-reactors, catalysis, dye-sensitized solar cells, and sensors 1-4. These materials with triple or more hollow vesicles or lamellar shells are expected to yield better performances than their single-or double-shell nanoporous counterparts, although their synthesis routes are not straightforward similar to those with single-or double-shell owing to the increased complexity of the structure 4. The literature reveals that the nanoporous silica materials have attracted a great deal of attention compared with other porous materials due to their easily accessible starting materials, biodegradability, functionalizability, environmentally friendly nature, and high chemical and mechanical stability 5-9. Hierarchically structured MS-HM silica (MS-HMS) materials have the advantages of both nanoporous silica and multi-shell hollow structures. Synthesis of MS-HMSs-mainly constituted of various sequences of interconnected pores of different sizes ranging from micro-(<2 nm), meso-(2-50 nm), to macropores (>50 nm)-offers an intelligent strategy to promote the adsorption properties, catalysis performance, and drug loading/releasing ability through minimizing diffusion barriers...

Section: Application Of Ms-hms-pl As An Adsorbent In the Removal Of Cmentioning

confidence: 99%

Section: Application Of Ms-hms-pl As An Adsorbent In the Removal Of Cmentioning

confidence: 99%

Hierarchical multi-shell hollow micro–meso–macroporous silica for Cr(VI) adsorption

Marjani

et al. 2020

Sci Rep

Self Cite

Chemistry An Asian Journal

“…The prepared material showed excellent adsorption capacity for the methylene blue, which is due to the presence of a large number of aromatic groups on the surface of these hybrid materials. These groups offered strong hydrophobic interactions which significantly enhanced the adsorption capacity of these hybrids for the methylene blue dye …”

Section: Synthesis Of Organo‐functionalized Molecular Sievesmentioning

confidence: 99%

Recent Advances in the Preparation and Applications of Organo‐functionalized Porous Materials

Yadav

Baskaran

Anjali

et al. 2020

Organo‐functionalized materials with porous structure offer unique adsorption, catalytic and sensing properties. These unique properties make them available for various applications, including catalysis, CO2 capture and utilization, and drug delivery. The properties and the performance of these unique materials can be altered with suitable modifications on their surface. In this review, we summarize the recent advances in the preparation and applications of organo‐functionalized porous materials with different structures. Initially, a brief historical overview of functionalized porous materials is presented, and the subsequent sections discuss the recent developments and applications of various functional porous materials. In particular, the focus is given on the various methods used for the preparation of organo‐functionalized materials and their important roles in the heterogenization of homogeneous catalysts. A special emphasis is also given on the applications of these functionalized porous materials for catalysis, CO2 capture and drug delivery.

Polymers for Advanced Techs

“…Covalent organic polymers (COPs) are two or three‐dimensional nanoporous materials with remarkable thermal and chemical stability and high surface area 15‐24 . COPs are used in a variety of applications such as adsorption 25‐28 .…”

Section: Introductionmentioning

confidence: 99%

Polyaniline/sulfonated‐covalent organic polymer nanocomposite: Structural and dye adsorption properties

Afshari

Dinari

Moradi

et al. 2020

Self Cite

The aim of this work is developing an adsorbent for the removal of anionic Acid Blue 45 dye from aqueous solutions. In this regard, the polyaniline/sulfonated-covalent organic polymer nanocomposites (PANI/S-COP NCs) were synthesized by in situ chemical polymerization method. The structure and morphology of these prepared nanocomposites were characterized by different techniques. The structural stability of the synthesized adsorbent was examined under different pH conditions. To optimize the adsorption conditions, various parameters such as pH, dye concentration, adsorbent dosage, contact time, and temperature were investigated. The maximum adsorption capacity of the prepared composite for 100 ppm of dye (at 25.0 C, pH: 5, and time: 120 minutes as optimum conditions) was 117 mg g −1. Different adsorption models were applied for the fitting of the obtained experimental data. It was found that the adsorption data can be well fitted to the linear Langmuir model (R 2 : .999). The adsorption kinetics can also be well described by the linear pseudosecond-order model, indicating the chemical adsorption mechanism for the dye molecules on the PANI/S-COP NCs surface.