Controlled synthesis of {001} facets-dominated dye-sensitized BiOCl with high photocatalytic efficiency under visible-light irradiation

Chen, Hongbin; Yu, Xiang; Zhu, Yi; Fu, Xionghui; Zhang, Yuanming

doi:10.1007/s11051-016-3529-4

Cited by 25 publications

(3 citation statements)

References 49 publications

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“…1a). The range of diffraction peaks created by Ni-BiOCl correspond with the characteristic peaks of the standard calorie in BiOCl (JCPDS#06-0249) [31]. In addition, the results showed that all the diffraction peaks moved about 0.1°to a large angle (Fig.…”

Section: Algae Inhibition Experimentsmentioning

confidence: 67%

Enhancement of superoxide evolution by nickel-doped for the removal of organic pollutants and cyanobacteria

Feng

Wang

et al. 2020

Journal of the Taiwan Institute of Chemical Engineers

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Organic pollutants and cyanobacteria exist in water widely, which make significant impacts on human health so that appropriate methods are needed for their removal. In this work, Ni doped Bismuth oxychloride (BiOCl) photocatalysts were successfully synthesized by a simple hydrothermal method. The light absorption and charge carriers separation involved in superoxide (•O2 − ) generation can be optimized with the introduction of Ni element. And photocatalytic degradation experiments showed that the 9% Ni-BiOCl enhanced photodegradation activity of organic matter (Rh B and BPA) as well as M. aeruginosa. The degradation efficiency of Ni-BiOCl on the removal of Rh B and BPA were approximately 34.99% and 57% higher than that of pristine BiOCl. Furthermore, the algae inactivation was systematically studied by three-dimensional fluorescence spectrum. Results showed that •O2 − acted an irreplaceable role among the experiment of photocatalytic algae removal, and the details were described as •O2 − and h + first destroyed the cell wall of M. aeruginosa, secondly inactivated the active fluorescent substances in the cell, and then catalyzed the oxidation of intracellular exudates such as chlorophyll and phycocyanin as inorganic substances. This study provides a multifunctional catalyst for controlling water pollution and environmental restoration.

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Section: Algae Inhibition Experimentsmentioning

confidence: 67%

Enhancement of superoxide evolution by nickel-doped for the removal of organic pollutants and cyanobacteria

Feng

Wang

et al. 2020

Journal of the Taiwan Institute of Chemical Engineers

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“…[15] Meanwhile, the 2-8 composite sample exhibited the features of BiOCl at the peak positions of 145 and 206 cm À1 , and weaker bands at 400 cm À1 assignable to the E g and B 1g modes generated by the motion of oxygen atoms. [16] The prominent peak of BiVO 4 positioned at 812 cm À1 disappears but the small peak position around 640 cm À1 ascribed to the asymmetric stretching mode (ν as ) of V-O bonding [17] is noticed in the 2-8 composite sample. The disappearance of the peak at 812 cm À1 could be due to the small existence of BiVO 4 in the composite (referring to the XRD and DRS results) accompanying the strong vibration peak of BiOCl that dominates this characteristic peak of BiVO 4 .…”

Section: Chemical Bondsmentioning

confidence: 94%

Characterization and Visible Light‐Driven Photocatalytic Activity of BiVO₄/BiOCl/Bi₂S₃ Nanocomposites Prepared by Sonochemical Process

Kansaard

Ishihara

Pecharapa

2023

Physica Status Solidi (a)

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Photodecomposition performance enhancement of BiVO4 is carried out by combining it with compatible semiconductors, such as bismuth oxyhalides and sulfide‐based photocatalyst materials. In this article, the synthesis of BiVO4/BiOCl/Bi2S3 is carried out by a one‐step sonochemical process at room temperature with various S:Bi mole ratios (1:9, 2:8, and 3:7). The crystallinity and morphological features of the synthesized powders display a BiVO4 monoclinic phase accompanied by BiOCl tetragonal and Bi2S3 orthorhombic phases. Field‐emission electron microscopy micrographs show an irregular shape with various particle sizes and layering with the characteristic shape of BiOCl. The optical bandgap of the composites has various values in the range of 1.3–3.3 eV. The best photocatalytic performance is observed for the 2–8 composite sample, which produced complete degradation of RhB, with k = 0.17 min−1, after 20 min of visible light exposure.

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“…If so, it contributes to fading the dye solution, without real degradation of the dye molecules. However, considering the energy level of the conduction band of bare WO 3 PS or NP (E CB = +0.82 eV), this direct reduction would be only possible for RhB molecules (E RhB/LRhB = +0.95 V vs. ENH, E MB/LMB = +0.53 V vs. ENH, E MO/LMO = +0.24 eV [72,73]).…”

Section: Photodecomposition Mechanismsmentioning

confidence: 99%

Plasmonic Photocatalysts Based on Au Nanoparticles and WO3 for Visible Light-Induced Photocatalytic Activity

Desseigne,

Chevallier,

Madigou

et al. 2023

Catalysts

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In this work, we report the application of Au/WO3 composite as a photocatalyst for the degradation of dyes under solar light irradiation. Au/WO3 nanocomposites were synthesized using an acid precipitation method followed by an impregnation/reduction at room temperature. Two composites were obtained by loading gold nanoparticles on two morphologies of nanostructured WO3, nanoplatelets (NP), and pseudospheres (PS). The elaboration parameters of the nanocomposites were optimized according to the gold mass percentage, the HAuCl4 precursor concentration, and the impregnation time. The structural, microstructural, and textural characterization were conducted using advanced techniques: XRD, SEM/TEM microscopies, and XPS and DRS spectroscopies. The optimal synthesis parameters are a 48 h impregnation of a five mass percentage of gold from a HAuCl4 precursor with a concentration of 10−3 mol·L−1. The obtained composites were formed with Au nanoparticles of 7 nm in size. The XRD analyses did not reveal any modification of the oxide supports structure after gold grafting, contrary to the sorption analyses, which evidenced a change in the state of the materials surface. XPS analysis revealed the reduction of W6+ ions into W5+, favoring the presence of oxygen vacancies. Furthermore, a localized surface plasmon resonance effect was observed in the composite at 540 nm. The photocatalysis results of several dye pollutants have shown a selective degradation efficiency depending on the charge of the polluting molecules, pH medium, and mass loading of the catalysts. At the native pH, the photocatalysis process is highly efficient on a cationic molecule, with a low adsorption capacity. Au/WO3 PS composite appears to be the most efficient, degrading almost the whole RhB and MB only in 60 min and 90 min, respectively, while, for the MO anionic dye, the degradation is more efficient in acidic medium (80%) than in basic medium (0%). Trap tests of the main active species were investigated and a photodecomposition mechanism is proposed.

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Controlled synthesis of {001} facets-dominated dye-sensitized BiOCl with high photocatalytic efficiency under visible-light irradiation

Cited by 25 publications

References 49 publications

Enhancement of superoxide evolution by nickel-doped for the removal of organic pollutants and cyanobacteria

Enhancement of superoxide evolution by nickel-doped for the removal of organic pollutants and cyanobacteria

Characterization and Visible Light‐Driven Photocatalytic Activity of BiVO₄/BiOCl/Bi₂S₃ Nanocomposites Prepared by Sonochemical Process

Plasmonic Photocatalysts Based on Au Nanoparticles and WO3 for Visible Light-Induced Photocatalytic Activity

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Controlled synthesis of {001} facets-dominated dye-sensitized BiOCl with high photocatalytic efficiency under visible-light irradiation

Cited by 25 publications

References 49 publications

Enhancement of superoxide evolution by nickel-doped for the removal of organic pollutants and cyanobacteria

Enhancement of superoxide evolution by nickel-doped for the removal of organic pollutants and cyanobacteria

Characterization and Visible Light‐Driven Photocatalytic Activity of BiVO4/BiOCl/Bi2S3 Nanocomposites Prepared by Sonochemical Process

Plasmonic Photocatalysts Based on Au Nanoparticles and WO3 for Visible Light-Induced Photocatalytic Activity

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Characterization and Visible Light‐Driven Photocatalytic Activity of BiVO₄/BiOCl/Bi₂S₃ Nanocomposites Prepared by Sonochemical Process