A multifunctional chitosan composite aerogel for PPCPs adsorption

Zhang, Wenkun; Huang, Ting; Ren, Yu; Yang, Shuai; Zhao, Xinyao; Yuan, Mao-Sen; Wang, Jinyi; Tu, Qin

doi:10.1016/j.carbpol.2022.120102

Cited by 25 publications

(4 citation statements)

References 49 publications

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“…[6,7] A series of new-generation green aerogels have been developed using eco-friendly, abundant, and inexpensive natural products such as cellulose, chitosan, and sodium alginate. [8][9][10] Among these, cellulose aerogel (CA) inherits the prominent characteristics of traditional aerogels and also has the advantages of high strengthto-density, low thermal conductivity, biocompatibility, and biodegradability, which makes CA eligible as a promising substrate for multifunctional materials. [11][12][13] Bamboo is believed a renewable and sustainable alternative source of cellulose by its fast growth rate, naturally high content of cellulose, and high-quality cellulose fibers with a high aspect ratio and excellent mechanical strength compared to wood.…”

Section: Introductionmentioning

confidence: 99%

Strong, Lightweight, and Shape‐Memory Bamboo‐Derived All‐Cellulose Aerogels for Versatile Scaffolds of Sustainable Multifunctional Materials

Dong,

Li,

Cai

et al. 2023

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Strong, lightweight, and shape‐memory cellulose aerogels have great potential in multifunctional applications. However, achieving the integration of these features into a cellulose aerogel without harsh chemical modifications and the addition of mechanical enhancers remains challenging. In this study, a strong, lightweight, and water‐stimulated shape‐memory all‐cellulose aerogel (ACA) is created using a combination strategy of partial dissolution and unidirectional freezing from bamboo. Benefiting from the firm architecture of cellulose microfibers bridging cellulose nanofibers /regenerated cellulose aggregated layers and the bonding of different cellulose crystal components (cellulose Iβ and cellulose II), the ACA, with low density (60.74 mg cm−3), possesses high compressive modulus (radial section: 1.2 MPa, axial section: 0.96 MPa). Additionally, when stimulated with water, the ACA exhibits excellent shape‐memory features, including highly reversible compression‐resilience and instantaneous fold‐expansion behaviors. As a versatile scaffold, ACA can be integrated with hydroxyapatite, carboxyl carbon nanotubes, and LiCl, respectively, via a simple impregnation method to yield functionalized cellulose composites for applications in thermal insulation, electromagnetic interference shielding, and piezoresistive sensors. This study provides inspiration and a reliable strategy for the elaborately structural design of functional cellulose aerogels endows application prospects in various multifunction opportunities.

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Section: Introductionmentioning

confidence: 99%

Strong, Lightweight, and Shape‐Memory Bamboo‐Derived All‐Cellulose Aerogels for Versatile Scaffolds of Sustainable Multifunctional Materials

Dong,

Li,

Cai

et al. 2023

Small

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“…Pharmaceutical and personal care products (PPCPs) comprise diverse organic substances, including antibiotics, analgesics, hormones for pharmaceuticals and cosmetics, antibacterial agent, preservatives for personal care products (Zhang et al, 2022). Metformin (MET), a common antidiabetic drug used for type Ⅱ diabetes treatment, has been ranked among the most widely used PPCPs because more than 200 million people are suffering from diabetes worldwide (Yu et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Efficient metformin transformation in sulfite/UV process co-present with oxygen

Zhang

Jiang

et al. 2023

Front. Environ. Sci.

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UV/sulfite process without oxygen has been extensively explored and used for the degradation of many micro-pollutants. In the present work, a UV/sulfite process in the presence of oxygen was applied to degrade a widely used pharmaceutical compound, metformin (MET). The results showed that the oxygen-involved UV/sulfite process could efficiently degrade MET. At an initial concentration of 2.5 mg/L, 86.0% of MET was removed from the contaminated water within 180 min irradiation at a sulfite dosage of 10 mM, solution pH of 9, and UV intensity of 4,092 μW/cm2. In addition, sulfate radical (SO4•-), hydroxide radical (•OH), hydrogen atom (•H), and hydrated electron (eaq−) were found to be the dominant active species contributing to MET removal in the studied process through scavenging experiments. The increase in UV intensity, sulfite dosage, solution pH, and reaction temperature enhanced MET degradation in the investigated process to a certain extent, whereas the introduction of bicarbonate and fulvic acid slightly suppressed MET degradation. Finally, the degradation products of MET were identified. The oxygen-involved UV/sulfite process exhibited a remarkable denitrification capacity (>80%) in MET. The findings of this study may offer a novel approach for treating emerging contaminants.

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“…Aerogel materials are characterized by large specific surface areas, low densities, high porosities, and low thermal conductivities, and are now widely used in filtration, thermal-insulation, and many other applications. [13][14][15] Zhang et al [16] developed a highly elastic, highly porous (porosity: ≈99.7%), ultralight (density: 8.54 mg cm −3 ), novel hydroxyapatite-based inorganic aerogel that functioned as a highly efficient air filter. Moreover, Pan et al [17] prepared highly mechanically strong polyimide aerogels that were used as high-or low-temperature thermal insulators.…”

Section: Introductionmentioning

confidence: 99%

Electrospun‐SiO₂‐Nanofiber‐Reinforced Cellulose Aerogel Loaded with ZIF‐67 for Air Filtration and Formaldehyde Adsorption

Shao,

Han,

Niu

et al. 2023

Adv Materials Technologies

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Indoor air pollution, which is detrimental to the human respiratory, nervous, and cardiovascular systems, is of increasing concern because considerable time is spent indoors. Thus, there is an urgent need to develop improved methods for controlling indoor air pollution. In this study, electrospinning and freeze‐drying methods are used to prepare a cellulose–silica nanofiber (C‐SNF) aerogel loaded with zeolitic imidazolate framework‐67 (ZIF‐67) for use in indoor air purification systems. The C‐SNF aerogel doped with 0.75 wt.% SiO2 nanofiber (SNF) exhibits a maximum compressive stress of 8.7 MPa, which is higher than that (6.4 MPa) of a pure cellulose aerogel. The compressive modulus of the aerogel exceeds 85% of its original value after 100 compression cycles. The C‐SNF aerogel exhibits a filtration efficiency of 99.91% against 0.3 µm salt particles at 32 L min−1, which is higher than that of the pure cellulose aerogel (51.25%). Moreover, a stable removal efficiency of 99.92% toward 2.5 µm particulate matter (PM2.5) is observed after ten cycles. Notably, the addition of ZIF‐67 to C‐SNF (ZIF‐67@C‐SNF) aerogel by in situ growth method resulted in a porosity of 92.3% and formaldehyde removal of 93.75%. The ZIF‐67@C‐SNF aerogel can be used in various applications including indoor‐air and adsorptive‐filtration masks.

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A multifunctional chitosan composite aerogel for PPCPs adsorption

Cited by 25 publications

References 49 publications

Strong, Lightweight, and Shape‐Memory Bamboo‐Derived All‐Cellulose Aerogels for Versatile Scaffolds of Sustainable Multifunctional Materials

Strong, Lightweight, and Shape‐Memory Bamboo‐Derived All‐Cellulose Aerogels for Versatile Scaffolds of Sustainable Multifunctional Materials

Efficient metformin transformation in sulfite/UV process co-present with oxygen

Electrospun‐SiO₂‐Nanofiber‐Reinforced Cellulose Aerogel Loaded with ZIF‐67 for Air Filtration and Formaldehyde Adsorption

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A multifunctional chitosan composite aerogel for PPCPs adsorption

Cited by 25 publications

References 49 publications

Strong, Lightweight, and Shape‐Memory Bamboo‐Derived All‐Cellulose Aerogels for Versatile Scaffolds of Sustainable Multifunctional Materials

Strong, Lightweight, and Shape‐Memory Bamboo‐Derived All‐Cellulose Aerogels for Versatile Scaffolds of Sustainable Multifunctional Materials

Efficient metformin transformation in sulfite/UV process co-present with oxygen

Electrospun‐SiO2‐Nanofiber‐Reinforced Cellulose Aerogel Loaded with ZIF‐67 for Air Filtration and Formaldehyde Adsorption

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Product

Resources

About

Electrospun‐SiO₂‐Nanofiber‐Reinforced Cellulose Aerogel Loaded with ZIF‐67 for Air Filtration and Formaldehyde Adsorption