Bottom-up construction of reduced-graphene-oxide-anchored spinel magnet Fe2.02Ni1.01O3.22, anatase TiO2 and metallic Ag nanoparticles and their synergy in photocatalytic water reduction

Bourzami, Riadh; Guediri, Mohamed Khalil; Chebli, Derradji; Bouguettoucha, Abdallah; Amrane, Abdeltif

doi:10.1016/j.jece.2021.105307

Cited by 12 publications

(4 citation statements)

References 68 publications

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“…The Sr-hexaferrite composites exhibit the characteristic (110), (107), (210), (114), (203), (205), (206), (1011), (217), (2011), and (214) reflections that correspond to the crystal phase (JCPDS PDF#: 00-024-1207) [ 20 ]. The composite contains typical reflections, (101), (004), (200), (105), (211), and (220), which correspond to the anatase crystal phase of TiO 2 referred to (JCPDS PDF#: 00-021-1272) [ 21 ], as shown in Figure 1 b. The figure displays a slight reduction in intensity of the TiO 2 -FG/Sr-hexaferrite nanocomposites as compared to TiO 2 and bare Sr-hexaferrites.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Novel Heterostructure-Functionalized Graphene-Based TiO2-Sr-Hexaferrite Photocatalyst for Environmental Remediation

Ullah

2022

Nanomaterials

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Novel visible-light photocatalyst (titanium-dioxide-functionalized graphene/strontium-hexaferrites) TiO2-FG/Sr-hexaferrite nanocomposites were fabricated using a simple hydrothermal technique. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), Raman spectroscopic analysis, and atomic force microscopy were used to analyze the composites as prepared. The unique TiO2-FG/Sr-hexaferrite-based composite catalyst reveals superior photocatalytic properties for the disintegration of organic dyes methylene blue (MB) and rhodamine B (Rh. B) under visible-light irradiation. The result showed that the functionalized graphene with ternary structure improved the catalytic behavior of the composite due to the synergistic effect of the TiO2-FG boosted by the graphene surface to provide a fast conducting path to the photogenerated charge carrier. The markedly high photocatalytic behavior has been ascribed to the formation of the ternary structure between TiO2, FG, and Sr-hexaferrites through interface interaction. The prepared photocatalyst composite exhibited better recyclability, which further confirms its future uses as a photocatalyst in industrial waste products.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Novel Heterostructure-Functionalized Graphene-Based TiO2-Sr-Hexaferrite Photocatalyst for Environmental Remediation

Ullah

2022

Nanomaterials

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“…In almost all cases (Table 3), silver integration leads to significant removal efficiency improvement, especially under visible light irradiation. This improvement is evident not only in the cases of organic dye pollutants [63,65,144,146,148,149] and hexavalent chromium [20,146] but also in the case of pharmaceutical pollutants [69,70]. Summarizing the findings of the works on magnetic composites, the base catalyst's surface area has been reported to increase after silver integration [26,117,118], leading to a greater number of active sites for the photocatalytic reactions, while the resulting point-of-zero charge value increase (representing the surface charge of the material) leads to a greater affinity to negatively charged reactants [20].…”

Section: Critical Summary Of Recent Developments In Magnetic Silver-i...mentioning

confidence: 86%

“…As for the more prominent magnetic materials utilized in recent works, Fe 3 O 4 is an especially prevalent semiconductor, often combined with g-C 3 N 4 in silver-integrated photocatalytic composites, especially for the photodegradation of azo/rhodamine-based dyes [65,[140][141][142][143][144][145][146]. Additionally prominent in such works are several types of spinel ferrites (MFe 2 O 4 ), based on M = Mg [134], Co [20,147], Ni [148], Zn [70,149,150] and even mixed ferrites as Ni 0.5 Zn 0.5 Fe 2 O 4 [151,152].…”

Section: Critical Summary Of Recent Developments In Magnetic Silver-i...mentioning

confidence: 99%

Magnetic Metal Oxide-Based Photocatalysts with Integrated Silver for Water Treatment

et al. 2022

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In this review, the most recent advances in the field of magnetic composite photocatalysts with integrated plasmonic silver (Ag) is presented, with an overview of their synthesis techniques, properties and photocatalytic pollutant removal applications. Magnetic attributes combined with plasmonic properties in these composites result in enhancements for light absorption, charge-pair generation-separation-transfer and photocatalytic efficiency with the additional advantage of their facile magnetic separation from water solutions after treatment, neutralizing the issue of silver’s inherent toxicity. A detailed overview of the currently utilized synthesis methods and techniques for the preparation of magnetic silver-integrated composites is presented. Furthermore, an extended critical review of the most recent pollutant removal applications of these composites via green photocatalysis technology is presented. From this survey, the potential of magnetic composites integrated with plasmonic metals is highlighted for light-induced water treatment and purification. Highlights: (1) Perspective of magnetic properties combined with plasmon metal attributes; (2) Overview of recent methods for magnetic silver-integrated composite synthesis; (3) Critical view of recent applications for photocatalytic pollutant removal.

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“…Even after five cycles, the separation membrane recovered 96.96% of its original state. In recent years, researchers have focused on improving the photocatalytic performance of materials by constructing semiconductor heterojunction structures. − Elhakim et al successfully constructed a ternary composite material, Ag/WO 3 /GO, by immobilizing WO 3 /GO on the surface of chitosan and then photochemically depositing Ag NPs. GO was used as a semiconductor to construct Z-type heterojunctions, which improved the photocatalytic activity of the material.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophilic PANI/Ag/TA@PVDF Composite Membrane with Antifouling Property for Oil–Water Separation

Wu,

He,

Zhao

et al. 2024

Langmuir

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The current membrane materials used for oil–water separation suffer from low separation efficiency and poor durability, and membrane contamination is also a key issue that must be addressed urgently. In this paper, a superhydrophilic PANI/Ag/TA@PVDF composite membrane with PANI-Ag NPs heterojunction structure was prepared via chelation and reduction of Ag+ by tannic acid (TA) and in situ growth of hydrochloric acid-doped polyaniline (PANI). TA endows the prepared composite membrane with excellent superhydrophilicity and underwater oleophobicity, remarkable oil–water separation capacity (the separation efficiency of more than 97% for soybean oil), and extraordinary antifouling properties. Notably, the range of photodegradation is expanded from UV to visible light by the construction of a Schottky heterostructure between PANI and Ag NPs, the photocatalytic degradation ability of composite membrane for organic pollutants has been improved obviously, and the degradation efficiency for crystal violet (CV) is 97.9%. Considering these merits, the PANI/Ag/TA@PVDF composite membrane provides an effective strategy to overcome the shortcomings of existing membrane materials, presenting enormous potential in the treatment and purification of oily wastewater.

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Bottom-up construction of reduced-graphene-oxide-anchored spinel magnet Fe2.02Ni1.01O3.22, anatase TiO2 and metallic Ag nanoparticles and their synergy in photocatalytic water reduction

Cited by 12 publications

References 68 publications

Fabrication of Novel Heterostructure-Functionalized Graphene-Based TiO2-Sr-Hexaferrite Photocatalyst for Environmental Remediation

Fabrication of Novel Heterostructure-Functionalized Graphene-Based TiO2-Sr-Hexaferrite Photocatalyst for Environmental Remediation

Magnetic Metal Oxide-Based Photocatalysts with Integrated Silver for Water Treatment

Superhydrophilic PANI/Ag/TA@PVDF Composite Membrane with Antifouling Property for Oil–Water Separation

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