One-step preparation of emulsion-templated amino-functionalized porous organosilica monoliths for highly efficient Cr(VI) removal

Zhang, Hongxia; Lü, Jieli; Peng, Junxia; Du, Guanqun; Peng, Haonan; Fang, Yu

doi:10.1016/j.colsurfa.2018.06.034

Cited by 20 publications

(7 citation statements)

References 28 publications

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“…In this study, the Cr(VI) adsorption capacity affected by the different pH of the two carbon materials is shown in Figure 5 . The initial Cr(VI) concentration was 50 mg/L, the dosage of adsorbent was 2.5 g/L, and the adsorption temperature was 298 K. Because the potassium dichromate solution exists in acidic form in nature, the pH range in adsorption of Cr(VI) was adjusted from 1.0 to 6.0 [ 29 , 38 ]. The results showed that the adsorption capacity of the two samples decreased with the pH increase, and the maximum adsorption amount was achieved when the pH reached 1.0 (HTC at 14.98 mg/g and HTC-NH 2 at 17.77 mg/g), and almost decreased by 90% when the pH was up to 6 (0.40 mg/g for HTC and 1.76 mg/g for HTC-NH 2 ), which is similar to the previous works [ 39 , 40 , 41 ].…”

Section: Resultsmentioning

confidence: 99%

Facial Synthesis of Adsorbent from Hemicelluloses for Cr(VI) Adsorption

2021

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It is challenging work to develop a low-cost, efficient, and environmentally friendly Cr(VI) adsorbent for waste water treatment. In this paper, we used hemicelluloses from chemical fiber factory waste as the raw material, and prepared two kinds of carbon materials by the green hydrothermal method as adsorbent for Cr(VI). The results showed that hemicelluloses hydrothermally treated with citric acid (HTC) presented spherical shapes, and hemicelluloses hydrothermally treated with ammonia solution (HTC-NH2) provided spongy structures. The adsorption capacity of the samples can be obtained by the Langmuir model, and the adsorption kinetics could be described by the pseudo-second-order model at pH 1.0. The maximum adsorption capacity of HTC-NH2 in the Langmuir model is 74.60 mg/g, much higher than that of HTC (61.25 mg/g). The green hydrothermal treatment of biomass with ammonia solution will provide a simple and feasible way to prepare adsorbent for Cr(VI) in waste water treatment.

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Section: Resultsmentioning

confidence: 99%

Facial Synthesis of Adsorbent from Hemicelluloses for Cr(VI) Adsorption

2021

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“…This study demonstrated an effective way to prepare emulsion‐templated porous adsorbents for the large‐scale practical environmental applications. [ 275 ]…”

Section: Environmental Applications Of Emulsion‐templated Porous Materialsmentioning

confidence: 99%

“…This study demonstrated an effective way to prepare emulsion-templated porous adsorbents for the large-scale practical environmental applications. [275] Hyperbranched PEI-tethered hierarchically macroporous beads, prepared via surfactant-aided Pickering emulsion tem-plating technique, were used to effectively adsorb Cr(VI) and CR ions/molecules with adsorption capacities of 141 mg g −1 and 37 mg g −1 , respectively (Figure 16c). The hierarchical macroporosity, high charge density, and diverse anchoring sites accounted for their better remediation characteristics.…”

Section: P(st-co-deaema) Membranesmentioning

confidence: 99%

Fundamentals and Design‐Led Synthesis of Emulsion‐Templated Porous Materials for Environmental Applications

et al. 2021

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Emulsion templating is at the forefront of producing a wide array of porous materials that offers interconnected porous structure, easy permeability, homogeneous flow-through, high diffusion rates, convective mass transfer, and direct accessibility to interact with atoms/ions/molecules throughout the exterior and interior of the bulk. These interesting features together with easily available ingredients, facile preparation methods, flexible pore-size tuning protocols, controlled surface modification strategies, good physicochemical and dimensional stability, lightweight, convenient processing and subsequent recovery, superior pollutants remediation/monitoring performance, and decent recyclability underscore the benchmark potential of the emulsion-templated porous materials in large-scale practical environmental applications. To this end, many research breakthroughs in emulsion templating technique witnessed by the recent achievements have been widely unfolded and currently being extensively explored to address many of the environmental challenges. Taking into account the burgeoning progress of the emulsion-templated porous materials in the environmental field, this review article provides a conceptual overview of emulsions and emulsion templating technique, sums up the general procedures to design and fabricate many state-of-the-art emulsion-templated porous materials, and presents a critical overview of their marked momentum in adsorption, separation, disinfection, catalysis/degradation, capture, and sensing of the inorganic, organic and biological contaminants in water and air.

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“…These hybrid materials could offer a reactive and easily-modified surface, large pore size and higher mechanical strength than conventional silica. They have had attractive applications in the field of catalysts [12,13,14,15], drug carriers [16], oil/water separation [17], heavy metal removal [18,19], chromatographic separations [20], and reverse osmosis desalination etc. [21].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, the functionalized organosilica materials with different organic groups (methyl, epoxide, amine and mercaptopropyl) on the surface have been studied [22,23,24,25,26,27]. Zhang et al fabricated the amine-functionalized porous organosilica monoliths with rich and adjustable pore structure via a one-step emulsion-templated process [18]. This amino-POMs demonstrated excellent Cr(VI)-removal capacity with the adsorption efficiency to be 92.8% at room temperature, and good durability with the efficiency still remaining as high as 85.1% after five recycles.…”

Section: Introductionmentioning

confidence: 99%

Mercapto-Functionalized Porous Organosilica Monoliths Loaded with Gold Nanoparticles for Catalytic Application

Pan

Gao

et al. 2019

Molecules

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Porous organosilica monoliths have attracted much attention from both the academic and industrial fields due to their porous structure; excellent mechanical property and easily functionalized surface. A new mercapto-functionalized silicone monolith from a precursor mixture containing methyltrimethoxysilane; 3-mercaptopropyltrimethoxysilane; and 3-mercaptopropyl(dimethoxy)methylsilane prepared via a two-step acid/base hydrolysis–polycondensation process was reported. Silane precursor ratios and surfactant type were varied to control the networks of porous monolithic gels. Gold nanoparticles were loaded onto the surface of the porous organosilica monolith (POM). Versatile characterization techniques were utilized to investigate the properties of the synthesized materials with and without gold nanoparticles. Scanning electron microscopy was used to investigate the morphology of the as-synthesized porous monolith materials. Fourier transform infrared spectroscopy was applied to confirm the surface chemistry. 29Si nuclear magnetic resonance was used to investigate the hydrolysis and polycondensation of organosilane precursors. Transmission electron microscopy was carried out to prove the existence of well-dispersed gold nanoparticles on the porous materials. Ultraviolet–visible spectroscopy was utilized to evaluate the high catalytic performance of the as-synthesized Au/POM particles

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One-step preparation of emulsion-templated amino-functionalized porous organosilica monoliths for highly efficient Cr(VI) removal

Cited by 20 publications

References 28 publications

Facial Synthesis of Adsorbent from Hemicelluloses for Cr(VI) Adsorption

Facial Synthesis of Adsorbent from Hemicelluloses for Cr(VI) Adsorption

Fundamentals and Design‐Led Synthesis of Emulsion‐Templated Porous Materials for Environmental Applications

Mercapto-Functionalized Porous Organosilica Monoliths Loaded with Gold Nanoparticles for Catalytic Application

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