Polyacrylamide hydrogel as a template in situ synthesis of CdS nanoparticles with high photocatalytic activity and photostability

Yang, Jiangbing; Gao, Jianping; Wang, Xiaoxue; Mei, Shunkang; Zhao, Ran; Hao, Chaoyue; Wu, Yongli; Zhai, Xiangang; Liu, Yu

doi:10.1007/s11051-017-4048-7

Cited by 21 publications

(13 citation statements)

References 49 publications

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“…3b, curve 1) does not demonstrate any absorption bands in the studied region of wavenumbers. Similar result has been reported in [23,38].…”

Section: Resultssupporting

confidence: 91%

“…Several works are devoted to in situ synthesis of CdS nanoparticles in cross-linked hydrogels [20,23,24]. The similar techniques involving three-stage process (synthesis of hydrogel polymer, its saturation with Cd 2+ ions, followed by treatment by Na 2 S solution) have been applied in all this works, which differ mostly in the nature of hydrogel matrices.…”

Section: Resultsmentioning

confidence: 99%

“…For example, CdS quantum dots were incorporated into hydrogels to produce fluorescent hydrogels which can be applied in various electronic and optoelectronic devices [22]. Authors [23] studied the enhanced photocatalytic activity and photo-corrosion inhibition of CdS/polyacrylamide (PAM) hydrogels. They showed that the formation of new N-Cd bonds and high transmittance of CdS/PAM hydrogels in UV-Vis light drastically enhance the photocatalytic activity, which makes these materials promising for use in the photocatalytic hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

“…The cross-linked polymer hydrogels have been synthesized via radical copolymerization of acryl amide with acrylic acid or 2-(dimethylamino) ethyl methacrylate and N,N′-methylenebis(acrylamide) as a cross-linker in aqueous media in the presence of cadmium salt followed by subjecting the hydrogel obtained to gaseous hydrogen sulphide to form CdS nanocrystals inside the hydrogel. Somewhat different techniques has been applied by other authors for in situ synthesis of CdS nanoparticles in cross-linked hydrogels, while using poly(2-acrylamido-2-methyl-1-propansulfonic acid) [20], poly(acryl amide) [23], copolymers of acryl amide with acrylic acids and 2-(dimethylamino)ethyl methacrylate [24] as polymer matrix. All of these techniques involve three separate stages of hydrogel polymer synthesis, its saturation with Cd 2+ ions by immersion of the hydrogel samples into a solution of cadmium salts, and subsequent treatment of hydrogel containing Cd 2+ ions with sodium sulphide solution.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characteristics of cross-linked polymer hydrogels with embedded CdS nanocrystals

et al. 2021

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Structural combining of polymer hydrogel network with mineral nanoparticles (metals, oxides, salts) is a very promising approach to create new functional materials with the specific properties. In this study, the cross-linked polymer hydrogels with embedded cadmium sulphide nanocrystals have been synthesized via radical copolymerization of acryl amide with acrylic acid or 2-(dimethylamino)ethyl methacrylate and N,N′-methylenebis(acrylamide) as cross-linker in aqueous media in the presence of nanoparticle precursor-cadmium salt, followed by subjecting the hydrogel obtained to gaseous hydrogen sulphide; this provides the in situ formation of CdS nanocrystals in pores of the hydrogel polymeric network. The effect of the Cd 2+ cation concentration on the copolymerization kinetics, as well as on the gel-fraction content has been studied. The formation of CdS nanocrystals with the size of 3-6 nm has been proved by UV-vis spectroscopy and X-Ray diffractometry. Importantly, the nanocrystal size is largely determined by the density of the hydrogel polymer network. The compressive strain of hydrogels with CdS nanoparticles is significantly larger than that for the initial hydrogels containing Cd 2+ cations only, apparently owing to the breaking of ionic and coordination bonds between metal cations and polar functional groups of matrix copolymer, which provide additional cross-linking of the hydrogel matrix. The obtained nanocomposite hydrogels are highly elastic materials characterized by a sufficiently high strength.

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“…3b, curve 1) does not demonstrate any absorption bands in the studied region of wavenumbers. Similar result has been reported in [23,38].…”

Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and characteristics of cross-linked polymer hydrogels with embedded CdS nanocrystals

et al. 2021

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“…Additionally, the photocatalytic material must be compatible with aqueous environments, allowing for easy partitioning of reagents into and out of the photocatalytic material. Therefore, the synthesis of a high transmittance, hydrophilic, porous substrate in combination with a homogeneously distributed photocatalytic moiety may yield more efficient photocatalysts. − …”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Hydrogels with a High Transmission Polymer Network for Pollutant Remediation

et al. 2021

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Efficient heterogeneous and metal-free photocatalysts have recently been targeted as reusable materials for pollutant remediation. However, poor light penetration into photocatalytic materials currently limits modern photocatalytic systems due to uneven performance across the photocatalytic material and inefficient light usage. Here, we present a classical photocatalytic polymer hydrogel composed of a high transmittance polymer network and small conjugated photocatalytic moieties. Radical copolymerization of a photocatalytically active benzothiadiazole acrylamide monomer with water-compatible N,N-dimethylacrylamide produced a photocatalytic hydrogel where only the photocatalytic moiety absorbs visible light. The photocatalytic hydrogel network enables easy partitioning of pollutants into the gel network, where they are photocatalytically degraded. The versatility and reusability of the photocatalytic material were demonstrated for degradation of both inorganic metal and organic contaminants, including N-(phosphonomethyl)glycine (glyphosate), the most commonly used herbicide. Furthermore, the potential of this material was explored in large-scale experiments, where glyphosate could be readily photodegraded at a half liter scale.

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Monolithic Porous Organic Polymer‐Photocatalyst Composites for Applications in Catalysis

Venditto,

Vaiano,

Sacco

2023

ChemCatChem

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This Review provides a perspective on porous organic polymer‐photocatalyst composites obtained by coupling semiconductors and hydrophilic/hydrophobic polymers which do not modify the properties of the embedded photocatalysts, but can influence the efficiency of the overall catalytic process. Particular attention has been given to polymer composites in the form of monolithic hydrogel/sponge/aerogels obtained by dissolving the polymer in a solvent, which contains the photocatalyst dispersed, inducing gelation or solidification of the solution and subsequently removing the solvent by a drying process. The photocatalytic applications discussed here cover H2 evolution from water splitting, CO2 reduction, and organic synthesis. Indeed, the main aim of this Review is to outline an alternative perspective to the highly studied environmental photocatalytic applications, highlighting the photoactive properties of these composites thanks to the incorporation of semiconductors in the 3D porous structure of organic polymers. Finally the challenges and potential advances associated with the use of porous organic polymer‐photocatalyst composites for future scientific research are outlined.

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Polyacrylamide hydrogel as a template in situ synthesis of CdS nanoparticles with high photocatalytic activity and photostability

Cited by 21 publications

References 49 publications

Synthesis and characteristics of cross-linked polymer hydrogels with embedded CdS nanocrystals

Synthesis and characteristics of cross-linked polymer hydrogels with embedded CdS nanocrystals

Photocatalytic Hydrogels with a High Transmission Polymer Network for Pollutant Remediation

Monolithic Porous Organic Polymer‐Photocatalyst Composites for Applications in Catalysis

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