Rational fabrication of flower-like BiOI1-x photocatalyst by modulating efficient iodine vacancies for mercury removal and DFT study

Guan, Yu; Wu, Jiang; Man, Xiaokun; Liu, Qizhen; Qi, Yongfeng; He, Ping; Qi, Xiaoqiong

doi:10.1016/j.cej.2020.125234

Cited by 139 publications

(47 citation statements)

References 56 publications

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“…As illustrated in Figure 1, BiOl and BiOI/CNF composites showed a diffraction peaks at 2 theta values of 9.7, 19.3, 24.1, 29.6, 31.4, 32.9, 36.8, 39.2, 45.2, 46.3, 49.5, 51.0, 54.9, 59.9, 61.3, 64.3 and 66.0 that assigned perfectly to the planes (001), (002), (011), (102), (110), (111), (103), (004), (200), (104), (005), (114), (212), (123), (115), (220) and (214) of BiOI, respectively (JCPDS NO. 10‐0445) [11,17,22,31–37] . The obtained diffraction peaks indicated the tetragonal phase structure of the BiOI in all rose‐like nanosheets.…”

Section: Resultsmentioning

confidence: 88%

Fast fabrication of bismuth oxyiodide/carbon‐nanofibers composites for efficient anti‐proliferation of liver and breast cancer cells

Algethami

Elamin

Abdulkhair

et al. 2021

Zeitschrift anorg allge chemie

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Semiconductor synthesis and applications are of increasing interest worldwide. A simple non‐autoclave method was developed to synthesize bismuth oxyiodide (BiOI) nanoparticles and nanocomposites of BiOI/carbon nanofibers (CNFs) in propylene glycol as a solvent. The as‐prepared BiOI and its CNFs‐composites were characterized by powder X‐ray diffraction (XRD), scanning electron microscopy‐energy X‐ray‐dispersive spectroscopy (SEM‐EDX), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT‐IR), Nitrogen adsorption‐desorption‐isotherm, and UV‐vis diffuse reflectance spectra. The XRD pattern confirmed that BiOI nanomaterial was prepared successfully by the developed method. SEM and TEM analysis revealed the BiOI in its pure and composites forms possessing rose‐like nanosheets built with BiOI nanoparticles. The addition of CNFs to the BiOI in increasing mass percentage enhanced the optical properties of the BiOI‐semiconductor. The obtained results confirmed that the short‐time refluxing method prepared BiOI and BiOI/CNFs composites successfully, with the advantage of eliminating the time and energy‐consuming step of autoclave digestion. Nevertheless, the nanomaterial‘s anticancer activity was revealed when tested against breast and liver cancer cell lines and measured at 540 nm.

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Section: Resultsmentioning

confidence: 88%

Fast fabrication of bismuth oxyiodide/carbon‐nanofibers composites for efficient anti‐proliferation of liver and breast cancer cells

Algethami

Elamin

Abdulkhair

et al. 2021

Zeitschrift anorg allge chemie

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“…The XRD patterns of BiOBr X I 1−X samples are shown in Figure 1 and were found to be highly crystalline. There were two characteristic peaks at about 31.8 and 32.3 • , which can be attributed to the (102) and (110) planes of BiOBr (JCPDS Card No.09-0393), respectively, and the major diffraction peaks that arrived at 29.7 and 31.7 • are indexed to the (102) and ( 110) planes of tetragonal BiOI (JCPDS No.73-2062), respectively [33,34]. Remarkably, magnified XRD patterns of the peaks ( 110) and (200) (Figure 1b) showed that the diffraction peaks significantly shifted toward lower angles, the peak intensity gradually decreased, and the half height width widened with the increasing amount of Br, resulting from the generation of internal stress in the crystal after Br doping.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Enhanced Light Photocatalytic Activity of Modulating Band BiOBrXI1−X Nanosheets

Zhang

Wang

et al. 2021

Nanomaterials

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The photocatalysis technique has been proven to be a promising method to solve environmental pollution in situations of energy shortage, and has been intensively investigated in the field of pollutant degradation. In this work, a band structure-controlled solid solution of BiOBrXI1−X (x = 0.00, 0.05, 0.10, 0.15, 0.20, 1.00) with highly efficient light-driven photocatalytic activities was successfully synthesized via simple solvothermal methods. The phase composition, crystal structure, morphology, internal molecular vibration, optical properties, and energy band structure were characterized and analyzed by XRD, SEM, HRTEM, XPS, Raman, and UV Vis DRS. To evaluate the photocatalytic activity of BiOBrXI1−X, rhodamine B was selected as an organic pollutant. In particular, BiOBr0.15I0.85 displayed significantly enhanced photocatalytic activity by virtue of modulating the energy band position, optimizing redox potentials, and accelerating carrier separation. Moreover, the enhancement mechanism was elucidated on the basis of band structure engineering, which provides ideas for the design of highly active photocatalysts for practical application in the fields of environmental issues and energy conservation.

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“…Bismuth oxyiodides (Bi x O y I z ), as promising photocatalysts due to their narrow band gaps, are beneficial to visible-light absorption. − The preparation of Bi x O y I z materials has been extensively studied by various methods, including the solvothermal method, the hydrothermal method, and other methods . For instance, Yu’s group synthesized Bi 4 O 5 I 2 by the microwave-assisted solvothermal method, which was used for phenol degradation and showed excellent photocatalysis performance .…”

Section: Introductionmentioning

confidence: 99%

Study of Sheetlike BiOI/Rodlike Bi₅O₇I Composite Photocatalyst by In Situ Crystallization of BiOI with pH-Dependence for Hg⁰ Removal

Guan

Liu

et al. 2021

Energy Fuels

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The sheetlike BiOI/rodlike Bi5O7I photocatalysts were prepared through an in situ crystallization method of BiOI with different pH values under alkaline condition. All the physicochemical properties of samples were tested by chemical characterization analysis. The results showed that the different preparation conditions of BiOI photocatalysts presented different microstructures under different pH values. When the value of pH increased from 8 to 14, the morphology of the sample gradually changed from sheetlike to rodlike. It was found that the formation of heterostructures can be constructed between sheetlike BiOI and rodlike Bi5O7I photocatalysts. Also, the photocatalytic ability of photocatalysts was tested via removing Hg0 under visible-light irradiation. All heterostructure photocatalysts exhibited outstandingly enhanced performance under the light-emitting diode (LED) lamp irradiation without any sacrificial agents in the environment. It was demonstrated that sample Bi-11.0 showed high activity in removing mercury, and the removal efficiency reached up to 63%, which improved the mercury-removal efficiency about 66.7% compared with Bi-8.0. The prominent photocatalytic performance was attributed to the internal electric field of different morphologies and the heterojunction between sheetlike BiOI and rodlike Bi5O7I, which impeded the recombination of photoelectron and hole (e––h+) pairs. This Article provides a new prospect for designing efficient photocatalysts to deal with heavy metal pollution and other environmental problems.

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Rational fabrication of flower-like BiOI1-x photocatalyst by modulating efficient iodine vacancies for mercury removal and DFT study

Cited by 139 publications

References 56 publications

Fast fabrication of bismuth oxyiodide/carbon‐nanofibers composites for efficient anti‐proliferation of liver and breast cancer cells

Fast fabrication of bismuth oxyiodide/carbon‐nanofibers composites for efficient anti‐proliferation of liver and breast cancer cells

Synthesis and Enhanced Light Photocatalytic Activity of Modulating Band BiOBrXI1−X Nanosheets

Study of Sheetlike BiOI/Rodlike Bi₅O₇I Composite Photocatalyst by In Situ Crystallization of BiOI with pH-Dependence for Hg⁰ Removal

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Rational fabrication of flower-like BiOI1-x photocatalyst by modulating efficient iodine vacancies for mercury removal and DFT study

Cited by 139 publications

References 56 publications

Fast fabrication of bismuth oxyiodide/carbon‐nanofibers composites for efficient anti‐proliferation of liver and breast cancer cells

Fast fabrication of bismuth oxyiodide/carbon‐nanofibers composites for efficient anti‐proliferation of liver and breast cancer cells

Synthesis and Enhanced Light Photocatalytic Activity of Modulating Band BiOBrXI1−X Nanosheets

Study of Sheetlike BiOI/Rodlike Bi5O7I Composite Photocatalyst by In Situ Crystallization of BiOI with pH-Dependence for Hg0 Removal

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Study of Sheetlike BiOI/Rodlike Bi₅O₇I Composite Photocatalyst by In Situ Crystallization of BiOI with pH-Dependence for Hg⁰ Removal