Construction of mechanically robust and recyclable photocatalytic hydrogel based on nanocellulose-supported CdS/MoS2/Montmorillonite hybrid for antibiotic degradation

Yue, Yiying; Shen, Shuting; Cheng, Wanli; Han, Guangping; Wu, Qinglin; Jiang, Jianchun

doi:10.1016/j.colsurfa.2021.128035

Cited by 25 publications

(14 citation statements)

References 47 publications

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“…Similarly, the DW sample exhibits stronger peaks at 1157 and 1033 cm –1 due to adsorbed water. For TW, the resulting FTIR spectrum possesses the characteristic bands of PAA (1698 cm –1 for CO, 1540 cm –1 for C–C, 1445 cm –1 for CH 2 , 1400 cm –1 for C–H, and 1238 cm –1 for C–O). ,− The peak intensity of TW at 3330 cm –1 has been greatly reduced as a result of the consumption of massive hydroxyl groups by the cross-linking effect between cellulose and PAA . Notably, the band at 1033 cm –1 (C–O stretching in cellulose) is retained in TW.…”

Section: Resultsmentioning

confidence: 99%

“…To clarify the adsorption mechanism of photocatalytic wood hydrogels for RhB, experimental data were imitated by pseudo-first-order and pseudo-second-order models. The two models are represented as eqs and : ln ( q e − q t ) = ln nobreak0em.25em⁡ q normale − k 1 t t / q t = 1 / ( k 2 · q e 2 ) + ( 1 / q e ) · t where q e (mg/g) and q t (mg/g) are the amounts of RhB absorbed at equilibrium and time t (min), whereas k 1 (1/min) and k 2 (g/(mg·min)) are the rate constants of the pseudo-first-order model and pseudo-second-order model, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…54 The E fb of BiOBr is −0.46 V (vs Ag/AgCl), corresponding to −0.26 V (vs NHE) (E NHE = E Ag/AgCl + 0.197 V). 5 Thus, the E CB of BiOBr is −0.56 V (vs NHE). From UV− vis DRS results, the E g of BiOBr is 2.66 eV, and the E VB of BiOBr is 2.1 V on the basis of the equation E VB = E CB + E g .…”

Section: Optical Transmittance Of Wood Hydrogelsmentioning

confidence: 97%

“…Note that in the pseudo-second-order model (correlation coefficient R 2 > 0.99), t is linear with t/q t (Figure 6c), and values of q e are closer to experimental values than those in the pseudo-first-order model (Table S1), suggesting that chemisorption dominates the RhB adsorption by photocatalytic wood hydrogels. 5 The photodegradation activity is a significant index to evaluate the practical application prospect of wood hydrogels. Figure 6d depicts a comparison of differences, caused by CDs doped with different elements, in photocatalytic performances of photocatalytic wood hydrogels.…”

Section: Optical Transmittance Of Wood Hydrogelsmentioning

confidence: 99%

“…Hydrogels have stood out among traditional matrices for immobilizing photocatalysts because of their high photocatalyst loading dosage and high transmittance. 4,5 Nevertheless, they suffer from restrictions of poor mechanical property, uniform dispersion of photocatalysts, and photo-catalyst shedding, which weaken their recyclability and photocatalysis behavior. 6−8 Recently, delignified wood (DW) with a natural threedimensional (3D) network structure and high mechanical strength has been creatively used as a photocatalytic carrier.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Optical Transmittance Of Wood Hydrogelsmentioning

confidence: 97%

Section: Optical Transmittance Of Wood Hydrogelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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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Hydrogel Nanocomposite Adsorbents and Photocatalysts for Sustainable Water Purification

Kumar

Gusain

Pandey

et al. 2022

Adv Materials Inter

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Anthropogenic actions, environmental catastrophes, urbanization, population growth, and industrialization generate toxic pollutants in water bodies. The most pollutants are heavy metals and metalloids, dyes, volatile organic compounds, pharmaceuticals, pesticides, radionuclides, aromatic hydrocarbons, oils, polycyclic aromatic hydrocarbons, microbes/pathogens, and microplastics that can be in different forms and concentrations. [3][4][5] Globally, approximately 2 million tons of pollutants from agriculture, industrial, and sewage waste are released into water streams, which pose severe health risks and cause the deaths of more than 1400 people every day. [6] Thus, developing efficient, economical, environmentalfriendly, and scalable technologies for the purification of wastewater and seawater is urgently required. To fulfill the shortage of clean water, affordable technologies can be used to transform unconventional water reserves (such as wastewater, rainfall, seawater, and brackish water) into potable water. Recently, numerous water treatment technologies, including coagulation/flocculation, filtration, chemical precipitation, aerobic/anaerobic processing, biological treatment, electrochemically precipitation, advanced oxidation processing, membrane separation, ion-exchange, adsorption, solar/thermal distillation/evaporation, crystallization, and photocatalysis, have emerged to offer practical solutions to water pollution management. [7][8][9][10][11][12][13][14] Among them, adsorption and photocatalysis technologies have garnered significant attention from the research community due to their cost-effectiveness, high performance, Hydrogels have been employed for water purification applications, but their performance and strength are unsatisfactory for widespread adoption. Recently, hydrogel nanocomposites have been proposed to resolve the inherent challenges faced by hydrogels for water treatment. This review comprehensively analyzes hydrogel nanocomposites for water treatment using adsorbent and photocatalysis techniques. The structure, classification, and tunable synthesis methods of hydrogels are explained. Further, how hydrogels can be incorporated with functional nanoparticles (NPs) and can be used as templates/precursors for developing advanced 3D architectures, including the formation of hydrogel nanocomposite beads and 3D printing objects are discussed. Finally, the structure-property relationships of hydrogel nanocomposites are critically reviewed by considering introductory gelation chemistry, such as swelling characteristics, mechanical properties, stimuli-responsiveness, and ionic/electronic conduction. The extensive cross-linking of polymer chains with NPs offers high mass/charge transport, high surface areas, and enhanced polymer-water interactions to achieve high-performing adsorbents and photocatalysts. Several motivating examples of emerging NP-containing hydrogel nanocomposites for use in adsorbents and photocatalysis have been discussed. Such efforts validated the excellent technological pote...

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Nanocellulose Materials and Composites for Emerging Applications

Jayeoye

Eze

Singh

2023

Engineering Materials

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Construction of mechanically robust and recyclable photocatalytic hydrogel based on nanocellulose-supported CdS/MoS2/Montmorillonite hybrid for antibiotic degradation

Cited by 25 publications

References 47 publications

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

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

Hydrogel Nanocomposite Adsorbents and Photocatalysts for Sustainable Water Purification

Nanocellulose Materials and Composites for Emerging Applications

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