High-efficiency, compressible, and recyclable reduced graphene oxide/chitosan composite aerogels supported g-C3N4/BiOBr photocatalyst for adsorption and degradation of rhodamine B

Pan, Hongyang; Gu, Jiamin; Hou, Kaiyang; Li, Junyao; Wang, Yu; Yue, Yiying

doi:10.1016/j.jece.2022.107157

Cited by 27 publications

(5 citation statements)

References 57 publications

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“…Concerning RhB degradation, the pseudo-first-order kinetics constant obtained in the experiment (k = 0.025 min −1 ) was about 3.8 times higher than that which was reported for the reduced graphene oxide/chitosan composite aerogels supported g-C 3 N 4 photocatalyst (k = 0.0065 min −1 ) [47] and it was comparable to the value reported by Xu et al [48] for a chitosan/TiO 2 @g-C 3 N 4 nanocomposite membrane (0.0238 min −1 ), although it should be noted that operative conditions were different (30 mg•L −1 RhB, pH = 2, and a 30 W LED lamp in the former study, and 5 mg•L −1 RhB and 100 W LED lamp in the latter one), so comparisons should be made with caution. If a comparison with pristine (non-doped) g-C 3 N 4 was made, the reported k value would be intermediate between those of g-C 3 N 4 and high-surface-area porous g-C 3 N 4 (0.014 and 0.131 min −1 , respectively) reported by Dong and Zhang [31].…”

Section: Photocatalytic Activitycontrasting

confidence: 56%

Multifunctional Nanocarriers Based on Chitosan Oligomers and Graphitic Carbon Nitride Assembly

et al. 2022

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In this study, a graphitic carbon nitride and chitosan oligomers (g-C3N4-COS) nanocarrier assembly, which was obtained by cross-linking with methacrylic anhydride (MA), was synthesized and characterized. Its characterization was carried out using infrared spectroscopy, elemental and thermal analyses, and transmission electron microscopy. The new nanocarriers (NCs), with an average particle size of 85 nm in diameter and a 0.25 dispersity index, showed photocatalytic activity (associated with the g-C3N4 moiety), susceptibility to enzymatic degradation (due to the presence of the COS moiety), and high encapsulation and moderate-high release efficiencies (>95% and >74%, respectively). As a proof of concept, the visible-light-driven photocatalytic activity of the NCs was tested for rhodamine B degradation and the reduction of uranium(VI) to uranium(IV). Regarding the potential of the nanocarriers for the encapsulation and delivery of bioactive products for crop protection, NCs loaded with Rubia tinctorum extracts were investigated in vitro against three Vitis vinifera phytopathogens (viz. Neofusicoccum parvum, Diplodia seriata, and Xylophilus ampelinus), obtaining minimum inhibitory concentration values of 750, 250, and 187.5 µg·mL−1, respectively. Their antifungal activity was further tested in vivo as a pruning wound protection product in young ‘Tempranillo’ grapevine plants that were artificially infected with the two aforementioned species of the family Botryosphaeriaceae, finding a significant reduction of the necrosis lengths in the inner woody tissues. Therefore, g-C3N4-MA-COS NCs may be put forward as a multifunctional platform for environmental and agrochemical delivery applications.

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Section: Photocatalytic Activitycontrasting

confidence: 56%

Multifunctional Nanocarriers Based on Chitosan Oligomers and Graphitic Carbon Nitride Assembly

et al. 2022

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“…In addition, the CO 2 produced in the degradation process can be converted into CO 3 2− under alkaline conditions, which consumed h + , thus the photocatalytic degradation was inhibited. 67 As shown in Fig. 10(b), at initial pH values of 3, 5, 7, 9 and 11, the photocatalytic degradation rates of TCH were 75.4%, 83.5%, 73.8%, 71.7% and 55.1%, respectively.…”

Section: Resultsmentioning

confidence: 82%

Sulfated lignocellulose nanofibril supported flower-like BiOBr with oxygen vacancies towards absorption–photocatalytic synergetic removal of organic pollutants

Zhou,

Liu,

Liu

et al. 2024

New J. Chem.

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“…The electrostatic attraction between RhB and Bi-N-CDs/BiOBr may be stronger than the electrostatic repulsion between RhB and PAA, which enhances the adsorption of Bi-N-CDs/BiOBr@TW, thereby increasing its removal rate. Meanwhile, RhB is more easily decomposed by de-ethylation and hydroxylation in an acidic environment. , At pH 5–11, zwitterionic RhB interacted with negatively charged PAA and Bi-N-CDs/BiOBr; the mutual repulsion among the three is likely to be the major interactive force that prevents RhB from being adsorbed to Bi-N-CDs/BiOBr@TW, thus weakening the removal effect. Specifically, the electronegativity of Bi-N-CDs/BiOBr drops sharply at pH ≥ 9; accordingly, the removal efficiency decreases dramatically.…”

Section: Resultsmentioning

confidence: 99%

“…Specifically, the electronegativity of Bi-N-CDs/BiOBr drops sharply at pH ≥ 9; accordingly, the removal efficiency decreases dramatically. Besides, in a highly alkaline environment, Bi-N-CDs/BiOBr can be disassembled, − and CO 2 generated during the RhB removal process may compete with RhB for radicals and be turned into CO 3 2– , both of which inhibit the removal. , …”

Section: Resultsmentioning

confidence: 99%

A Transparent, High-Strength, and Recyclable Core–Shell Structured Wood Hydrogel Integrated with Carbon Dots for Photodegradation of Rhodamine B

Yue

2023

ACS Appl. Nano Mater.

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The opacity, fragility, and environmental unfriendliness of the traditional photocatalytic matrix cannot fully utilize the properties of photocatalysts and efficiently degrade pollutants. In this work, a transparent wood hydrogel with a core–shell structure was developed using transparent wood (TW) impregnated with polyacrylic acid (PAA) as the core layer and Bi-N-carbon dots/BiOBr (Bi-N-CDs/BiOBr) photocatalyst-initiated polymerization of acrylic acid (AA) monomers as the shell layer. In the shell layer, nanoscale CDs with rich hydrophilic groups built a link between BiOBr and PAA and strengthened the adsorption–photocatalysis synergistic removal for RhB. The original wood backbone well conserved during preparation led to an anisotropic structure in the resultant Bi-N-CDs/BiOBr@TW photocatalytic wood hydrogel. Namely, after introducing Bi-N-CDs/BiOBr as the linker and reinforcing agent, the tensile strength was up to 3.2 and 11.03 MPa along the radial (R-) and axial (A-) directions, which was 1.6- and 1.06-fold of R-TW and A-TW, respectively. Hence, Bi-N-CDs/BiOBr@TW with high strength furnishes multiple separations and reutilizations, and the RhB removal rate is approximately 85% after five cycles. The Bi-N-CDs/BiOBr@TW exhibited light transmittance up to 64.6 and 52.3% at 800 nm along the R- and A-directions, respectively. Moreover, the adsorption–photocatalysis synergistic rate of Bi-N-CDs/BiOBr@TW reached 93% in 300 min at pH = 7. This paper offers a strategy for fabricating wood hydrogels with outstanding stretchability, transparency, dye removal efficiency, and recyclability, opening a significant route for alleviating dye pollution.

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High-efficiency, compressible, and recyclable reduced graphene oxide/chitosan composite aerogels supported g-C3N4/BiOBr photocatalyst for adsorption and degradation of rhodamine B

Cited by 27 publications

References 57 publications

Multifunctional Nanocarriers Based on Chitosan Oligomers and Graphitic Carbon Nitride Assembly

Multifunctional Nanocarriers Based on Chitosan Oligomers and Graphitic Carbon Nitride Assembly

Sulfated lignocellulose nanofibril supported flower-like BiOBr with oxygen vacancies towards absorption–photocatalytic synergetic removal of organic pollutants

A Transparent, High-Strength, and Recyclable Core–Shell Structured Wood Hydrogel Integrated with Carbon Dots for Photodegradation of Rhodamine B

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