Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

Yue, Jie; Wen, Guochang; Ren, Guina; Tang, Shaowang; Ge, Bo; Zhao, Limin; Shao, Xin

doi:10.1021/acs.langmuir.0c03053

Cited by 20 publications

(6 citation statements)

References 44 publications

(57 reference statements)

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“…This high oil absorption capacity of the FSM bio-aerogel might be of great value as absorbent in food applications, [87] environmental remediation [84,88] and wastewater purification as previously reported for different types of bio-aerogels such cellulose [89] and chitosan, [71] inorganic and inorganic-organic hybrid aerogels [90,91] such graphene [92,93] based aerogels.…”

Section: General Characterizationsupporting

confidence: 74%

Versatile Route for Multifunctional Aerogels Including Flaxseed Mucilage and Nanocrystals

Abdelmonem

Zámbó

Rusch

et al. 2022

Macromol. Rapid Commun.

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Preparation of low density monolithic and free-standing organic-inorganic hybrid aerogels of various properties is demonstrated using green chemistry from a biosafe natural source (flaxseed mucilage) and freeze-casting and subsequent freeze drying. Bio-aerogels, luminescent aerogels, and magneto-responsive aerogels are obtained by combination of the flaxseed mucilage with different types of nanoparticles. Moreover, the aerogels are investigated as possible drug release systems using curcumin as a model. Various characterization techniques like thermogravimetric analysis, nitrogen physisorption, electron microscopy, UV/Vis absorption, and emission spectroscopy, bulk density, and mechanical measurements, as well as in vitro release profile measurements, are employed to investigate the obtained materials. The flaxseed-inspired organic-inorganic hybrid aerogels exhibit ultra-low densities as low as 5.6 mg cm −3 for 0.5% (w/v) the mucilage polymer, a specific surface area of 4 to 20 m 2 g −1 , high oil absorption capacity (23 g g −1 ), and prominent compressibility. The natural biopolymer technique leads to low cost and biocompatible functional lightweight materials with tunable properties (physicochemical and mechanical) and significant potential for applications as supporting or stimuli responsive materials, carriers, reactors, microwave-and electromagnetic radiation protective (absorbing)-materials, as well as in drug delivery and oil absorption.

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Section: General Characterizationsupporting

confidence: 74%

Versatile Route for Multifunctional Aerogels Including Flaxseed Mucilage and Nanocrystals

Abdelmonem

Zámbó

Rusch

et al. 2022

Macromol. Rapid Commun.

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“…After 15 min of visible light irradiation, the BiOBr@G-1mL composite photodegrades almost 97% of RhB molecules, compared to only 70% for pure BiOBr, to the best of our knowledge, which is quite superior to that of previous studies. 7 , 9 , 12 , 32 In comparison, the BiOBr@G-1mL composite with an optimal combination of GO mass displays the highest photocatalytic activity among a series of BiOBr@G composites with different graphene oxide contents, which are ordered as BiOBr@G-1mL > BiOBr@G-0.5mL (BiOBr@G-2mL) > pure BiOBr > P25. Therefore, it is easy to conclude that the degradation efficiency of RhB molecules can be improved compared to that of pure BiOBr after graphene modification on BiOBr flake systems.…”

Section: Resultsmentioning

confidence: 99%

Green Assembly of Covalently Linked BiOBr/Graphene Composites for Efficient Visible Light Degradation of Dyes

Tie

Bhattacharyya²,

Han

et al. 2022

ACS Omega

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A novel high-performance BiOBr@graphene (BiOBr@G) photocatalyst with a new assembly structure had been demonstrated using a facile hydrothermal method through chemical bonding of reduced graphene oxide and structure-defined BiOBr flakes for improving charge separation and transfer performance, which were first synthesized at room temperature in immiscible solvents without corrosive acids. The prepared samples were characterized, and the BiOBr@G composite realized an efficient assembly portfolio of graphene and BiOBr flakes with defined structures, verified by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman and X-ray photoelectron spectroscopy (XPS), in which BiOBr flakes were covalently linked with the assembled graphene sheets through the Bi–C bond. This composite exhibited remarkable visible light absorbance and efficient photoinduced charge splitting characteristics in comparison with those of pure BiOBr, as established by DRS absorption, photoluminescence radiation, and photocurrent study. Hence, a very small amount (5 mg) of the BiOBr@G composite displayed a complete photodegradation effect on the rhodamine B dye under only 15 min of visible light excitation, which was three times faster than that of pure BiOBr and extremely superior to that of commercial P25. This was probably ascribed to the well-defined BiOBr structure itself, elevated light absorbance, and Bi–C chemical bond inducing quick charge separation and transfer in the BiOBr@G composite. Additionally, investigations on the photocatalytic mechanism displayed that the photogenerated holes in the BiOBr valence band and derivative superoxide radicals played vital roles in the photodegradation of RhB dyes, as reinforced by the electron spin resonance method, where the covalent linking of BiOBr and graphene served as an effective pathway for charge transportation.

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“…5c). Edetate disodium (0.5 mmol/L, EDTA-2Na), isopropyl alcohol (1 mmol/L, IPA) and p-Benzoquinone (1 mmol/L, p-BQ) respectively serve as the quenchers of vacancy (h + ), hydroxyl free radical (•OH) and superoxide anion (•O 2 − ) (Yue et al 2021;Tang et al 2020;Deng et al 2020;Li et al 2019). The RhB solution (50 mL, 10 mg/L) is regarded as the principal degradation target, and the above scavengers are appended in the reaction system to investigate the principles of photocatalytic response.…”

Section: Resultsmentioning

confidence: 99%

Water repellent Bi2MoO6 cotton fabric for implementing water-source purification

Yue¹,

Tang²,

Ge³

et al. 2021

Preprint

Self Cite

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As a low-budget, facile-availability and eco-friendly substrate material, cotton fabric after hydrophobic modification has been applied to sewage purification. While, a single superhydrophobic function is unable to decompose toxic water-soluble organic dye. In this paper, pathways are propounded for the simultaneous achievement of the removal of insoluble spilling oil and organic dye contaminants. Particularly, the hydrophobic ZnSnO3 after stearic acid modification and Bi2MoO6 catalysts are introduced into the cotton fabric substrate through solution dip-coating. The durability of the prepared fabric suffers from the acid-base corrosion, thermal treatment and mechanical wear, meanwhile, it still exhibits remarkable water repellent (WCA > 150°) property. Furthermore, the remarkable photocatalytic activity makes it possible for reusable degradation and the primary active species, namely the holes, to be verified by the radicals-capturing experiment.

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Superhydrophobic Self-Supporting BiOBr Aerogel for Wastewater Purification

Cited by 20 publications

References 44 publications

Versatile Route for Multifunctional Aerogels Including Flaxseed Mucilage and Nanocrystals

Versatile Route for Multifunctional Aerogels Including Flaxseed Mucilage and Nanocrystals

Green Assembly of Covalently Linked BiOBr/Graphene Composites for Efficient Visible Light Degradation of Dyes

Water repellent Bi2MoO6 cotton fabric for implementing water-source purification

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