Solvothermal synthesis of BiOI hierarchical spheres with homogeneous sizes and their high photocatalytic performance

Shi, Xiaojing; Chen, Xiliang; Chen, Xin; Zhou, Shu; Lou, Shiyun

doi:10.1016/j.matlet.2011.10.063

Cited by 56 publications

(18 citation statements)

References 21 publications

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“…All the detectable peaks in the pattern were pure tetragonal phase BiOBr, BiOI, and Additional evidence of the formation of the asprepared photocatalysts came from EDS (Fig. 3) that shows BiOX are composed of only Bi, O, and halide atoms [37]. In case of BiOI 0.5 Br 0.5 heterojunction, the atomic ratio of [I/(I + Br)] was provided as 0.5 (Fig.…”

Section: Characterizationmentioning

confidence: 94%

Degradation of Lindane using two nanosized BiOXs and their heterojunction under visible light

Jamil

Mansor

Nasr

2015

Desalination and Water Treatment

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In this paper, bismuth oxybromide (BiOBr), bismuth oxyiodide (BiOI), and heterojunction (BiOI 0.5 Br 0.5 ) were prepared via facile co-precipitation method, a low-temperature solution route, and facile chemical etching method, respectively. They were prepared by Bi (NO 3 ) 3 ·5H 2 O as the Bi source. The resulting BiOBr, BiOI, and BiOI 0.5 Br 0.5 photocatalysts were fully characterized using X-ray diffraction, energy-dispersive X-ray spectroscopic, scanning electron microscopy, high-resolution transmission electron microscopy, SAED, Brunauer-Emmett-Teller surface area, and UV-vis diffuse reflectance spectra techniques. The prepared photocatalysts were of pure tetragonal phase, and homogeneous particles. Their surface area are 6.19, 296.6, and 186.6 m 2 /g, and their band gaps were about 2.9, 1.9, and 2.1 eV for BiOBr, BiOI, and BiOI 0.5 Br 0.5 , respectively. Their photocatalytic property was investigated by the degradation of Lindane in aqueous solution under commercial visible metal halide lamp. The optimum amounts of BiOBr, BiOI, and BiOI 0.5 Br 0.5 powders were 1.0 g/L at pH 8 that degraded 60, 80, and 95% of Lindane, respectively, after 2 h of irradiation. Moreover, BiOI 0.5 Br 0.5 heterojunction exhibited much higher photocatalytic activity for the degradation of Lindane under visible light (λ > 420 nm) than pure BiOBr and BiOI, Since, the reaction kinetic constants for degradation of Lindane by BiOBr, BiOI, and BiOI 0.5 Br 0.5 heterojunction were 0.0073, 0.0126, and 0.0194 min −1 , respectively. It is a prospective strategy for constructing highly efficient bismuth halide-based heterojunction to eliminate organic pollutants in water.

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Section: Characterizationmentioning

confidence: 94%

Degradation of Lindane using two nanosized BiOXs and their heterojunction under visible light

Jamil

Mansor

Nasr

2015

Desalination and Water Treatment

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“…Those Cl species in crystal structure are gradually substituted by OH À ions in basic conditions and high temperature, resulting into the reduced content of Cl atoms in products, characteristic of oxygen-rich bismuth oxychloride derivatives. PVP was usually used as a surfactant to control reaction process, such as reducing surface tension, stabilizing nanoparticles, and regulating nucleation and crystal growth in syntheses, to generate nanomaterials with various morphologies [27]. First, PVP tends to act as a potential crystal face inhibitor in reaction, which promotes the generation of oriented nucleation, further causing the fabrication of preferential growth in the 2D plane perpendicular to the c-axis [13,24].…”

Section: Morphology and Microstructuresmentioning

confidence: 99%

Poly(vinyl pyrrolidone)-assisted hydrothermal synthesis and enhanced visible-light photocatalytic performance of oxygen-rich bismuth oxychlorides

Chang

Luo

Wang

et al. 2015

Journal of Colloid and Interface Science

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a b s t r a c tA series of novel oxygen-rich bismuth oxychloride (Bi 12 O 17 Cl 2 ) were synthesized through a facile poly (vinyl pyrrolidone) (PVP)-assisted hydrothermal route. These obtained Bi 12 O 17 Cl 2 samples were characterized by various physicochemical techniques. It was found that a proper addition amount of PVP could promote the transformation of Bi 12 O 17 Cl 2 morphology from irregular clusters to three-dimensional hierarchical flower-like microspheres that were nominated as sample BP2. As-synthesized samples were subjected to a photocatalytic degradation of dye Rhodamine B (RhB) or 2,4-dichlorophenol (2,4-DCP) under visible light. Among all candidates, the sample BP2 with a hierarchical flower-like morphology showed the best degradation efficiency for RhB and 2,4-DCP. The apparent rate constant of sample BP2 in terms of degradation of RhB was nearly 5.7 and 45 times that of unmodified BP0 and N-TiO 2 . The enhanced photocatalytic performance could be ascribed to synergetic effects including unique hierarchical morphologies, large specific surface area, small particle size, good crystallinity, and suitable band structures. A possible mechanism of catalytic degradation was finally proposed basing upon the active species trapping experiments.

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“…[9] Among them, BiOI, with the narrow band gap, has the strongest adsorption under visible light irradiation. Whereas, researches [10][11][12][13] mostly focus on the synthetic method of BiOX and commonly choose universal organic pollutants, such as methyl orange and rhodamine B, to investigate photocatalytic performance. The study of degradation of sulfadimethoxine, a stubborn environmental pollution, using BiOI could promote photocatalytic applications in wasterwater treatment.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Sulfadimethoxine and Products in Aqueous Solution by BiOI Under Visible Light with H₂O₂

Zhang

Yan

Wang

et al. 2015

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-

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A visible light-induced BiOI photocatalytic process was used to degrade sulfadimethoxine (SDM). The highest degradation efficiency of SDM was 96% after 2 h of visible light irradiation. The chemical oxygen demand (COD) of the solution decreased substantially and the high COD removal achieved 88%. During this time, the organic sulfur was recovered in the form of sulfate and the organic nitrogen was retrieved in the form of nitrate. Moreover, the high photodegradation efficiency and the less toxic photodegradation products suggest BiOI is a likely photocatalyst for the degradation of SDM under visible light.

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Solvothermal synthesis of BiOI hierarchical spheres with homogeneous sizes and their high photocatalytic performance

Cited by 56 publications

References 21 publications

Degradation of Lindane using two nanosized BiOXs and their heterojunction under visible light

Degradation of Lindane using two nanosized BiOXs and their heterojunction under visible light

Poly(vinyl pyrrolidone)-assisted hydrothermal synthesis and enhanced visible-light photocatalytic performance of oxygen-rich bismuth oxychlorides

Degradation of Sulfadimethoxine and Products in Aqueous Solution by BiOI Under Visible Light with H₂O₂

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Solvothermal synthesis of BiOI hierarchical spheres with homogeneous sizes and their high photocatalytic performance

Cited by 56 publications

References 21 publications

Degradation of Lindane using two nanosized BiOXs and their heterojunction under visible light

Degradation of Lindane using two nanosized BiOXs and their heterojunction under visible light

Poly(vinyl pyrrolidone)-assisted hydrothermal synthesis and enhanced visible-light photocatalytic performance of oxygen-rich bismuth oxychlorides

Degradation of Sulfadimethoxine and Products in Aqueous Solution by BiOI Under Visible Light with H2O2

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Degradation of Sulfadimethoxine and Products in Aqueous Solution by BiOI Under Visible Light with H₂O₂