Alginate and polyethyleneimine dually mediated synthesis of nanosilver-containing composites for efficient p-nitrophenol reduction

“…reported the catalytic hydrogenation of p‐nitrophenol (PNP) using 3D silver/poly(ethylenimine)/alginate hydrogel beads (Ag@PEI@AHB) prepared by a facile one‐pot assembly method. [ 216 ] The experimental results show that the 20% silver‐loaded Ag@PEI@AHB catalysts can exhibit 90% PNP conversion at 298 K (120 s) under fixed‐bed conditions. The catalytic conversion follows the pseudo‐first‐order kinetic.…”

Section: Adsorptive and Photocatalytic Performance Of Various Hydroge...mentioning

confidence: 99%

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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“…[19][20][21] For example, Shi et al prepared three-dimensional silver/polyethyleneimine/alginate hydrogel beads by using a one-autoclave assembly method and applied them effectively in the catalytic hydrogenation reaction of p-nitrophenol. 22 Polyethyleneimine was used to reduce and limit the growth of silver nanoparticles and alginate microspheres were used as catalyst carriers, resulting in good silver nanoparticle dispersions. The catalysts produced took only 120 s to complete the reaction at ambient temperature (20% silver loading), and the catalytic performance of the recycled catalysts maintained a high efficiency, with the conversion remaining at 96.4% after 10 cycles.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of N-GQDs/CuS/Cv-CNNs hydrogels and their performance in hexavalent chromium wastewater treatment

Wang,

Ren

et al. 2024

New J. Chem.

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Alginate and polyethyleneimine dually mediated synthesis of nanosilver-containing composites for efficient p-nitrophenol reduction

Cited by 55 publications

References 44 publications

Self-driven in situ facile synthesis of CuO/Cu₂O for enhanced catalytic reduction of 4-nitrophenol by acetic acid

Self-driven in situ facile synthesis of CuO/Cu₂O for enhanced catalytic reduction of 4-nitrophenol by acetic acid

Hydrogel Nanocomposite Adsorbents and Photocatalysts for Sustainable Water Purification

Synthesis of N-GQDs/CuS/Cv-CNNs hydrogels and their performance in hexavalent chromium wastewater treatment

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Alginate and polyethyleneimine dually mediated synthesis of nanosilver-containing composites for efficient p-nitrophenol reduction

Cited by 55 publications

References 44 publications

Self-driven in situ facile synthesis of CuO/Cu2O for enhanced catalytic reduction of 4-nitrophenol by acetic acid

Self-driven in situ facile synthesis of CuO/Cu2O for enhanced catalytic reduction of 4-nitrophenol by acetic acid

Hydrogel Nanocomposite Adsorbents and Photocatalysts for Sustainable Water Purification

Synthesis of N-GQDs/CuS/Cv-CNNs hydrogels and their performance in hexavalent chromium wastewater treatment

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Product

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Self-driven in situ facile synthesis of CuO/Cu₂O for enhanced catalytic reduction of 4-nitrophenol by acetic acid

Self-driven in situ facile synthesis of CuO/Cu₂O for enhanced catalytic reduction of 4-nitrophenol by acetic acid