A systematic review on new advancement and assessment of emerging polymeric cryogels for environmental sustainability and energy production

Haleem, Abdul; Pan, Jianming; Shah, Afzal; Hussain, Hidayat; He, Wei‐Dong

doi:10.1016/j.seppur.2023.123678

Cited by 37 publications

(21 citation statements)

References 156 publications

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“…Since adsorption is a relevant property for water remediation and catalytic processes involving pollutant removal [ 3 ], information about the trend as a function of network density linked to the resulting mechanical performances is of utmost importance. As it turns out, sample A presents an R% and Qe values that are quite close to sample C. However, their mechanical properties are sensibly different.…”

Section: Resultsmentioning

confidence: 99%

“…Among them, materials able to satisfy the requests of the different applications area are cryogels. They play a predominant role in environmental and energetic applications [ 3 ]. As is well known, their interconnected macroporous structure can confer super absorbance with high and tuneable mechanical properties in hydrophilic and hydrophobic formulations.…”

Section: Introductionmentioning

confidence: 99%

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How the Crosslinker Amount Influences the Final Properties of Hydroxyethyl Methacrylate Cryogels

Proietto Salanitri,

Luzzi,

Caretti

et al. 2024

Gels

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The investigation of the mechanical, thermal, and adsorption properties of hydroxyethyl methacrylate (HEMA) cryogels as a function of a reactant ratio is herein reported to better address materials for specific applications. To this aim, cryogels have been synthesized using different monomer/crosslinker (N,N′-methylene-bisacrylamide–MBAA) ratios. The study of SEM images made it possible to identify the trend in the material’s macroporosity. As would be expected, the average measured pore width decreased as the amount of MBAA increased while the number of pores grew. Swelling capacity ranges from 8.7 gW/ggel (grams of water per gram of gel) to 9.3 gW/ggel. These values are strictly connected with the pore’s size and distribution, revealing that the water uptake for the most crosslinked sample is inferior to other samples. The equilibrium-adsorption capacity (Qe) towards the methylene violet (MV) was also assessed, revealing no remarkable differences after 24 h of a batch test. As expected, thermogravimetric analysis (TGA) also showed no significant changes in stability that ranged from a maximum weight loss temperature (T Max) of 420 °C to 425 °C, which increased as a function of crosslinker content. Conversely, compression strength measurements showed a notable difference of about 50% in modulus (Ec), moving from the higher to the lower HEMA/MBAA ratio. These new comparative results indicate how slight variations in the reactant’s ratio can steadily improve the mechanical properties of the HEMA cryogel without affecting its adsorption efficiency. This can be helpful in the design of materials for water and energy purposes. Since swelling properties are needed in the case of biomedical applications, the HEMA/MBAA ratio should be tuned versus high values.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

How the Crosslinker Amount Influences the Final Properties of Hydroxyethyl Methacrylate Cryogels

Proietto Salanitri,

Luzzi,

Caretti

et al. 2024

Gels

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“…Polymeric gels have a couple of crucial characteristics, including swelling, pseudoplastic (non-Newtonian) rheological behaviour, electrical oscillation, a mechanoelectrical effect, and interactions with opposingly charged surfactants [ 47 , 48 , 49 , 50 ]. As a result, various significant types of gels, including physical gels, hydrogels [ 51 ], nanogels [ 52 ], aerogels [ 53 ] and cryogels [ 54 ], have been studied, produced, and used in a variety of industrial applications over the past few years, including wastewater treatment [ 55 , 56 ]. However, for water treatment applications, the use of cryostructured materials instead of hydrogels may lead to higher adsorption capacities as a result of their extended pore structure, which facilitates access to specific binding sites.…”

Section: Introductionmentioning

confidence: 99%

Retention of Ciprofloxacin and Carbamazepine from Aqueous Solutions Using Chitosan-Based Cryostructured Composites

Dumitru,

Neagu,

Miron

et al. 2024

Polymers

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Water pollution is becoming a great concern at the global level due to highly polluted effluents, which are charged year by year with increasing amounts of organic residues, dyes, pharmaceuticals and heavy metals. For some of these pollutants, the industrial treatment of wastewater is still relevant. Yet, in some cases, such as pharmaceuticals, specific treatment schemes are urgently required. Therefore, the present study describes the synthesis and evaluation of promising cryostructured composite adsorbents based on chitosan containing native minerals and two types of reinforcement materials (functionalized kaolin and synthetic silicate microparticles). The targeted pharmaceuticals refer to the ciprofloxacin (CIP) antibiotic and the carbamazepine (CBZ) drug, for which the current water treatment process seem to be less efficient, making them appear in exceedingly high concentrations, even in tap water. The study reveals first the progress made for improving the mechanical stability and resilience to water disintegration, as a function of pH, of chitosan-based cryostructures. Further on, a retention study shows that both pharmaceuticals are retained with high efficiency (up to 85.94% CIP and 86.38% CBZ) from diluted aqueous solutions.

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“…[9,10] Therefore, removing these dyes before discharging them into the water resources is an important task from an environmental approach that has challenged many scientists. [11][12][13][14][15][16] Currently, there are reliable methods for treating contaminated and colored wastewater. These include separation methods (such as adsorption, membrane filtration, etc.)…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Selenium Dioxide for Better Photocatalytic Performance of Conventional Semiconductors Distributed into Mesoporous SBA‐15

Ranjbar‐Niavol,

Zanjanchi,

Farjood

2023

ChemistrySelect

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The mesoporous SBA‐15 was synthesized in acidic conditions by hydrothermal method using Pluronic surfactant P123. A combination of SeO2, TiO2, and CuO was loaded in SBA‐15 in pairs or singly. Synthesized SBA‐15 and some loaded mesoporous materials were characterized using several standard techniques. The efficiency of the synthesized photocatalysts was verified for the decomposition of two different dyes (methylene blue (MB) and methyl green (MG)) under ultraviolet and visible light radiation. The results show that the synthesized photocatalyst based on SBA‐15 with 5 % by weight of TiO2 and 5 % by weight of SeO2 has better performance (about 98 % of MB or MG were degraded within 120 min under UV radiation). Also, the photocatalyst with 5 % by weight of SeO2 and 5 % by weight of CuO shows a good performance for the degradation of the dyes under visible irradiation in the presence of H2O2 (complete elimination of MB and MG within 150 and 75 min, respectively). The scavenging test shows that superoxide has a governing role for the degradation of the dyes. The photocatalysts are reusable and they could preserve more than 74 % of the efficiency following 4 times of consecutive use for the degradation of the dyes.

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A systematic review on new advancement and assessment of emerging polymeric cryogels for environmental sustainability and energy production

Cited by 37 publications

References 156 publications

How the Crosslinker Amount Influences the Final Properties of Hydroxyethyl Methacrylate Cryogels

How the Crosslinker Amount Influences the Final Properties of Hydroxyethyl Methacrylate Cryogels

Retention of Ciprofloxacin and Carbamazepine from Aqueous Solutions Using Chitosan-Based Cryostructured Composites

Synergistic Effect of Selenium Dioxide for Better Photocatalytic Performance of Conventional Semiconductors Distributed into Mesoporous SBA‐15

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