One-step solution combustion synthesis of Bi/BiOCl nanosheets: Reaction mechanism and photocatalytic RhB degradation

Yu, Yong; Yang, Zhaobiao; Shang, Zhichao; Wang, Xiaohong

doi:10.1016/j.jpcs.2022.111172

Cited by 15 publications

(4 citation statements)

References 35 publications

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“… , This caused some films to appear black. Such reduction of Bi 3+ to Bi metal is a known phenomenon, having been reported in the literature as well. − We attribute the presence of Bi metal to carbothermal reactions where the carbonaceous residue char is oxidized by Bi 3+ reducing to Bi 0 . Despite this initial impurity, upon annealing in air at 200 °C, the Bi metal is reoxidized and is incorporated into phase-pure BiOX.…”

Section: Resultssupporting

confidence: 59%

Single-Source Precursors for the Controlled Aqueous Synthesis of Bismuth Oxyhalides

et al. 2023

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Bismuth oxyhalides are a promising class of photocatalysts for harvesting solar energy. These materials are often synthesized in aqueous media with poor synthetic control resulting from the extremely fast nucleation and growth rates of the particles. These fast rates are caused by the rapid precipitation of bismuth salts with free halide ions. We have developed watersoluble precursors combining bismuth with either chlorine or bromine atoms in the same metal−organic complex. With the application of heat, halide ions are released, which then precipitate with bismuth ions as BiOX (X = Cl, Br). By controlling the halide ion formation rate, the nucleation and growth rates of BiOX materials can be tuned to provide synthetic control. The diverse potential of these precursors is demonstrated by synthesizing BiOX in three ways: aqueous colloidal synthesis, solid-state decomposition, and fabrication of films of BiOX via spray pyrolysis of the aqueous precursor solutions. These broadly applicable single-source precursors will enhance the ability to synthesize future BiOX materials with controlled morphologies.

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Section: Resultssupporting

confidence: 59%

Single-Source Precursors for the Controlled Aqueous Synthesis of Bismuth Oxyhalides

et al. 2023

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“…It can be seen from Figure 4a that the MMT has a clear layered structure, and its lamellar layer is stripped to a certain extent, which accords with the micromorphological characteristics of MMT [32]. As Figure 4b shows, BiOCl has an obvious two-dimensional layered structure and an accumulation of layers with layers, indicating that BiOCl nanosheets have high crystallity and a large specific surface area, which is conducive to the separation of photogenerated electron-hole pairs, thus improving the photocatalytic activity of the samples [33]. In comparison with the SEM image of MMT, the micromorphol- ogy of TMC was obviously changed, and a slit mesopore appeared (Figure 4c), which is consistent with the result that TMC has an H 3 -type hysteresis ring.…”

Section: Sem Analysissupporting

confidence: 52%

Preparation and characterization of BiOCl/TiO₂/MMT composite materials

Tuo,

Shi,

Tian

et al. 2023

Materials Science-Poland

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To broaden the light response range of TiO2 and improve its photocatalytic activity, BiOCl/TiO2/MMT composite materials (BTMC) with outstanding photocatalytic performance were prepared by the sol-gel method with montmorillonite (MMT) as the supporting material, tetrabutyl titanate as titanium source and, bismuth nitrate pentahydrate as the bismuth source. The properties of the prepared materials were characterized by X-ray diffractometer (XRD), surface and porosity analysis (BET), scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM-EDS), transmission electron microscopy (TEM), X-ray photoelectron spectrometry (XPS), and ultraviolet-visible diffuse reflection spectroscopy (UV-Vis DRS). When the Bi/Ti molar ratio was 20%, the composite material exhibited a slit mesoporous structure, and its specific surface area was 109.02 m2/g, with optimum photocatalytic activity. TiO2 and BiOCl formed the type-II heterojunction on the surface of MMT, which facilitates the transfer of photogenerated electrons and holes, thus enhancing the photocatalytic activity of BTMC-20. The results of this study indicated that BTMC-20 is a promising photocatalytic composite material and has better photocatalytic properties under visible light.

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“…The Eg of g-C 3 N 5 is approximately 1.72 eV (Figure 7b) based on the Kubelka-Munk equation. [42] The maximum absorption edge of BiOCl is approximately 370 nm, and the Eg is approximately 2.95 eV. However, the Eg of the 15-C 3 N 5 -BiOCl composite catalyst is approximately 2.84 eV.…”

Section: Characterization Analysismentioning

confidence: 96%

Formation of Z‐scheme g‐C₃N₅‐BiOCl to enhance photocatalytic activity under visible light

Jiao

Zhang

et al. 2023

Applied Organom Chemis

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g-C 3 N 5 has wide-ranging applications in photocatalysis owing to its twodimensional layered structure, large surface area, and small band gap. In this study, the surface of g-C 3 N 5 was subjected to inorganic acid modification and combined with BiOCl to form a heterojunction, effectively improving the photocatalytic activity of the material. The rates of degradation of rhodamine B and ciprofloxacin by the 15-C 3 N 5 -BiOCl composite photocatalyst were 22.2 and 20.7 times higher, respectively, than those of degradation by g-C 3 N 5 . This was attributed to the Z-type heterojunction formed by g-C 3 N 5 and BiOCl, which significantly improved the efficiency of photogenerated electron-hole pairs separation and broadened the optical response range. The preparation of novel photocatalysts has broad application prospects in the treatment of organic pollutants in water.

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One-step solution combustion synthesis of Bi/BiOCl nanosheets: Reaction mechanism and photocatalytic RhB degradation

Cited by 15 publications

References 35 publications

Single-Source Precursors for the Controlled Aqueous Synthesis of Bismuth Oxyhalides

Single-Source Precursors for the Controlled Aqueous Synthesis of Bismuth Oxyhalides

Preparation and characterization of BiOCl/TiO₂/MMT composite materials

Formation of Z‐scheme g‐C₃N₅‐BiOCl to enhance photocatalytic activity under visible light

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One-step solution combustion synthesis of Bi/BiOCl nanosheets: Reaction mechanism and photocatalytic RhB degradation

Cited by 15 publications

References 35 publications

Single-Source Precursors for the Controlled Aqueous Synthesis of Bismuth Oxyhalides

Single-Source Precursors for the Controlled Aqueous Synthesis of Bismuth Oxyhalides

Preparation and characterization of BiOCl/TiO2/MMT composite materials

Formation of Z‐scheme g‐C3N5‐BiOCl to enhance photocatalytic activity under visible light

Contact Info

Product

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Preparation and characterization of BiOCl/TiO₂/MMT composite materials

Formation of Z‐scheme g‐C₃N₅‐BiOCl to enhance photocatalytic activity under visible light