Clearance of methylene blue by CdS enhanced composite hydrogel materials

Chen, Lei; He, Chao; Yin, Jiarui; Chen, Shengqiu; Zhao, Weifeng; Zhao, Changsheng

doi:10.1080/09593330.2020.1788170

Cited by 4 publications

(2 citation statements)

References 58 publications

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“…Direct activation of the nanoparticles is possible with energy superior to the bandgap of CdS, which is 3.2 eV (385 nm) [ 44 , 45 ]. According to numerous studies in the literature, the holes and electrons fashioned during photolysis can oxidize organic molecules, resulting in all of them being oxidized to • OH radicals when they interact with water or hydroxides.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Ternary MoS2/CdS/Bi2S3-Based Nano Composites for Photocatalytic Dye Degradation

et al. 2023

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The synthesis and design of low-cost visible-light-active catalysts for the photodegradation of organic dyes have been regarded as an efficient way to use solar energy in addressing environmental issues. We report the fabrication of MoS2/CdS nanoparticles functionalized with Bi2S3 nanoflakes. The ternary composites of “MoS2/CdS/Bi2S3” were synthesized in situ by a hydrothermal method at different temperatures. The changes in structural, optical, and morphological properties of the synthesized CdS/MoS2/Bi2S3 were explored. The effects of Bi2S3 on CdS/MoS2 were thoroughly studied by performing an X-ray diffractometer (XRD), a scanning electron microscope (SEM), an ultra-violet–visible spectrometer (Uv–vis), and Fourier transform infrared spectroscopic (FT-IR) studies of the nanoparticles. XRD confirms the cubical crystal structure of the nanoparticles. SEM studies possess the modulation in the surface morphology with the tenability in volume ratios of “MoS2/CdS/Bi2S3” composites. It was observed that the bandgaps calculated using absorption measurements could be manipulated from 2.40 eV to 0.97 eV with varying Bi2S3 in the MoS2/CdS nanostructures. FT-IR confirmed the synthesis of “MoS2/CdS/Bi2S3” nanoparticles. On allowing the visible light to fall for 120 min, it was observed that “MoS2/CdS/Bi2S3” degrades the methylene blue up to 90%. The calculated results of “MoS2/CdS/Bi2S3” suggest that the synthesized material could be a strong candidate for photodegradation applications. This research work explains the synthesis of MoS2/CdS/Bi2S3-based nanocomposites for the degradation of dye using a photocatalytic process. The final results show that this catalyst effectively degrades the dye.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Ternary MoS2/CdS/Bi2S3-Based Nano Composites for Photocatalytic Dye Degradation

et al. 2023

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“…Metal sulfides, such as MoS 2 , [295,296] CdS, [297] ZnS, [298] FeS, [299,300] and NiS, [34] are semiconductor materials that are incorporated with hydrogels to enhance the visible light adsorption properties and improve other hydrogel nanocomposite characteristics, such as mechanical strength, selective adsorption, and ease the separation. However, little work has been done in this direction.…”

Section: Metal Sulfide-based Hydrogel Nanocompositesmentioning

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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Polymer hydrogels for stabilization of inorganic nanoparticles and their application in catalysis for degradation of toxic chemicals

Hussain

Shahid

Ali

et al. 2021

Environmental Technology

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Clearance of methylene blue by CdS enhanced composite hydrogel materials

Cited by 4 publications

References 58 publications

Fabrication of Ternary MoS2/CdS/Bi2S3-Based Nano Composites for Photocatalytic Dye Degradation

Fabrication of Ternary MoS2/CdS/Bi2S3-Based Nano Composites for Photocatalytic Dye Degradation

Hydrogel Nanocomposite Adsorbents and Photocatalysts for Sustainable Water Purification

Polymer hydrogels for stabilization of inorganic nanoparticles and their application in catalysis for degradation of toxic chemicals

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