A lightweight, mechanically strong, and shapeable copper-benzenedicarboxylate/cellulose aerogel for dye degradation and antibacterial applications

Ren, Yuxuan; Hersch, Steven J.; He, Xiuli; Zhou, Rufan; Dong, Tao; Lu, Qingye

doi:10.1016/j.seppur.2021.120229

Cited by 31 publications

(23 citation statements)

References 84 publications

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“…For related aerogels rendered by the freeze-drying method, Young’s moduli ranged from 0.114 to 3.98 MPa. Weaker aerogels (i.e., A1 , A2 , and A3 ) may find applications as recyclable oil absorbers, while stronger ones (i.e., A7 and A8 ) could be suitable for the stabilization of functionalized gel materials (useful in dye degradation and antibacterial applications) . We found that the sequence of freeze–thaw followed by hydrothermal treatment led to stiffer hydrogels than the opposite order.…”

Section: Discussionmentioning

confidence: 83%

“…Weaker aerogels (i.e., A1, A2, and A3) may find applications as recyclable oil absorbers, 44 while stronger ones (i.e., A7 and A8) could be suitable for the stabilization of functionalized gel materials (useful in dye degradation and antibacterial applications). 45 We found that the sequence of freeze−thaw followed by hydrothermal treatment led to stiffer hydrogels than the opposite order. By combining both of these gelation strategies together in different sequences, and assisted by introducing a second CNC gel network, we could realize the tunability of mechanical properties of the CNC gels without any additives.…”

Section: ■ Conclusionmentioning

confidence: 80%

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Cellulose Nanocrystal Gels with Tunable Mechanical Properties from Hybrid Thermal Strategies

Soto

Drummond

et al. 2023

ACS Appl. Mater. Interfaces

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Gels are useful materials for drug delivery, wound dressings, tissue engineering, and 3D printing. These various applications require gels with different mechanical properties that can be easily tuned, also preferably excluding the use of chemical additives, which can be toxic or harmful to the body or environment. Here, we report a novel strategy to synthesize cellulose nanocrystal (CNC) gels with tunable mechanical properties. Sequential freeze–thaw cycling and hydrothermal treatments were applied to CNC suspensions in different orders to give a series of pristine CNC hydrogels. Freeze-drying of the hydrogels also afforded a series of lightweight CNC aerogels. The mechanical properties of the hydrogels and aerogels were studied by rheological measurements and compression strength tests, respectively. Specifically, the complex modulus of CNC hydrogels ranged from 160 to 32,000 Pa among eight different hydrogels, while Young’s modulus of CNC aerogels was tuned from 0.114 to 3.98 MPa across five different aerogels. The microstructures of aerogels were also investigated by scanning electron microscopy and X-ray microtomography, which revealed remarkable differences between the materials. Solvent sorption–desorption tests showed that the reinforced networks have excellent stability over the basic CNC aerogels in ethanol, demonstrating a material enhancement from the preparation strategies we developed. Thermal conductivity and thermal stability for these materials were also investigated, and it was found that the lowest thermal conductivity was 0.030 W/m K, and all of the aerogels are generally stable below 280 °C. These characteristics also expand the potential applications of this family of CNC gels to lightweight supporting materials and thermal insulators.

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Section: Discussionmentioning

confidence: 83%

Section: ■ Conclusionmentioning

confidence: 80%

Cellulose Nanocrystal Gels with Tunable Mechanical Properties from Hybrid Thermal Strategies

Soto

Drummond

et al. 2023

ACS Appl. Mater. Interfaces

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“…MOFs, consisting of metal ions or clusters connected with organic linkers, exhibit some unique properties, including high crystallinity, large surface area, tunable micro-/mesoporous structure, good stability, to name just a few. [183] Owing to these fascinating characteristics, MOFs have attracted increasing attention in recent years in various areas, such as environmental remediation, [184][185][186] catalysis, [187,188] gas separation and adsorption, [189,190] energy conversion and storage, [191] and biomedical applications. [192][193][194] As shown in Table 6, there is a rise of curiosity for using MOFs for interfacial solar evaporation, owing to their broadband light absorption and hierarchical morphologies for sufficient solar energy harvest and conversion, large surface area, porous structure, and suitable surface wettability for water delivery by capillary effect and vapor escape.…”

Section: Metal-organic Frameworkmentioning

confidence: 99%

Systematic Review of Material and Structural Design in Interfacial Solar Evaporators for Clean Water Production

et al. 2023

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Rational and sustainable utilization of resources is critical for the continuous development of this society. Solar energy, as one of the renewables, shows great potential in replacing part of the traditional energy supplies since it is clean, abundant, and easily convertible to thermal, electrical, and biological energies. Using solar energy as the green driving force, interfacial solar evaporation is a promising way for clean water production to alleviate global water shortage, taking advantage of its high evaporation efficiency (more than 80%) and strong adaptability toward various water sources and fields. In recent years, various kinds of materials with diverse designs have been synthesized and applied in interfacial solar evaporation for clean water production. Herein, recent progress in interfacial solar evaporators for clean water production is systematically reviewed, based on the photothermal conversion mechanisms of solar absorbers, including carbonous, semiconductor‐based, and plasmatic ones. Furthermore, key design factors and strategies in interfacial solar evaporators are reviewed and discussed from material and structural design point of view, such as water transport, thermal management, latent heat for water vaporization, and salt accumulation. Finally, some perspectives related to resolving existing problems in the field are given.

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“…With the development of technology and the large demand for textiles and printing, the industrial discharge is gradually increasing. − These industrial wastewaters are highly variable and complex, which can contain suspended particles and refractory organic substances such as dyes. − The complexity and variability of these wastewaters makes most commonly adopted single-step technologies fail to meet stringent waster regulations. − To achieve complete removal of these pollutants, wastewater treatment facilities have to adopt a series of complicated processes that combine different technologies of adsorption, − oxidation, , disinfection, and filtration. − Therefore, given the rapidly expanding inventory of industrial wastewaters and increasing demands for high treatment efficiency for these complex wastewaters, it is urgent to find a viable and simple strategy to realize complete remediation of these pollutants from wastewater through a single-step treatment.…”

Section: Introductionmentioning

confidence: 99%

Mussel-Inspired Catechol-Grafted Quaternized Chitosan Flocculant for Efficiently Treating Suspended Particles and Refractory Soluble Organic Pollutants

Ban

Yang

Huang

et al. 2023

Ind. Eng. Chem. Res.

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It remains challenging yet of great importance to develop a qualified biopolymer-derived flocculant in treating complex high-salinity wastewaters polluted by suspended solids and refractory soluble organic substances such as organic dyes. The key to this success is to endow the developed flocculants with versatile intermolecular and interfacial interactions in high salinity to trigger effective flocculation. Herein, inspired by mussel's powerful wet adhesion in a salted marine environment to diverse interfaces, we develop a mussel-inspired chitosan-based flocculant (CQ-CS) by simultaneously grafting catechol and cationic trimethylammonium groups to chitosan backbones. Compared with its cationic compartment, the optimal dosage of CQ-CS is decreased greatly after introducing catechol groups. Moreover, CQ-CS works in a wide pH range from 2 to 7 and can achieve more than 95% removal efficiency of soluble organic dyes and suspended particles such as anionic dyes and kaolin clay at the optimal dosages. More importantly, the flocculation performance of CQ-CS exhibits excellent tolerance to the salinity. As NaCl concentration increases from 0 to 2000 mg/L, CQ-CS maintained similar removal efficiencies for organic dyes, while the removal efficiency of quaternized chitosan (Q-CS) for organic dyes decreased by approximately 8% at this salinity. Finally, CQ-CS exhibits excellent flocculation performance to industrial dyeing wastewaters.

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A lightweight, mechanically strong, and shapeable copper-benzenedicarboxylate/cellulose aerogel for dye degradation and antibacterial applications

Cited by 31 publications

References 84 publications

Cellulose Nanocrystal Gels with Tunable Mechanical Properties from Hybrid Thermal Strategies

Cellulose Nanocrystal Gels with Tunable Mechanical Properties from Hybrid Thermal Strategies

Systematic Review of Material and Structural Design in Interfacial Solar Evaporators for Clean Water Production

Mussel-Inspired Catechol-Grafted Quaternized Chitosan Flocculant for Efficiently Treating Suspended Particles and Refractory Soluble Organic Pollutants

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