Novel microreactors of polyacrylamide (PAM) CdS microgels for admirable photocatalytic H2 production under visible light

An, Zhaolin; Gao, Jianping; Wang, Luyao; Zhao, Xiaoxiang; Yao, Hongduo; Zhang, Man; Tian, Qiang; Liu, Yu

doi:10.1016/j.ijhydene.2018.11.211

Cited by 22 publications

(3 citation statements)

References 60 publications

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“…The polymer nature of hydrogels obtained is confirmed by the presence in their FTIR spectra of adsorption bands with the maxima at 2938-2940 cm −1 and 1407-1408 cm −1 , which are attributed to the stretching and bending vibrations of -CH 2 -groups of the main polymer backbone [34,35], while no adsorption bands that are characteristic for initial monomer > C = C < groups is found.…”

Section: Resultsmentioning

confidence: 84%

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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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Section: Resultsmentioning

confidence: 84%

“…stretching vibration and amide N-H deformation vibrations (amide II band) respectively; adsorption band at 1408 cm −1 can be assigned to C-N stretching vibration (amide III band) [33,34].…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2021

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“…Metal sulfide-based photocatalysts are widely investigated because of their unique physical and chemical properties [9][10][11]. In comparison with their metal oxide analogs, sulfide semiconductors with narrower band gaps hold more promise as photocatalysts for H 2 production [12].…”

Section: Introductionmentioning

confidence: 99%

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Lee

Chang

2019

Catalysts

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Metal sulfide-based photocatalysts have gained much attention due to their outstanding photocatalytic properties. This review paper discusses recent developments on metal sulfide-based nanomaterials for H2 production, acting as either photocatalysts or cocatalysts, especially in the last decade. Recent progress on key experimental parameters, in-situ characterization methods, and the performance of the metal sulfide photocatalysts are systematically discussed, including the forms of heterogeneous composite photocatalysts, immobilized photocatalysts, and magnetically separable photocatalysts. Some methods have been studied to solve the problem of rapid recombination of photoinduced carriers. The electronic density of photocatalysts can be investigated by in-situ C K-edge near edge X-ray absorption fine structure (NEXAFS) spectra to study the mechanism of the photocatalytic process. The effects of crystal properties, nanostructure, cocatalyst, sacrificial agent, electrically conductive materials, doping, calcination, crystal size, and pH on the performance of composite photocatalysts are presented. Moreover, the facet effect and light trapping (or light harvesting) effect, which can improve the photocatalytic activity, are also discussed.

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Band gap engineered chalcogenide nanomaterials for visible light-induced photocatalysis

Xia

Chen

et al. 2021

Chalcogenide-Based Nanomaterials as Photocatalysts

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Novel microreactors of polyacrylamide (PAM) CdS microgels for admirable photocatalytic H2 production under visible light

Cited by 22 publications

References 60 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

Recent Progress on Metal Sulfide Composite Nanomaterials for Photocatalytic Hydrogen Production

Band gap engineered chalcogenide nanomaterials for visible light-induced photocatalysis

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