Effect of Composition on the Optical and Photocatalytic Properties of Visible Light Responsive Materials Bi26–xMgxO40

Shtarev, Dmitry S.; Kevorkyants, Ruslan; Мolokeev, Maxim S.; Shtareva, Anna V.

doi:10.1021/acs.inorgchem.0c00486

Cited by 9 publications

(5 citation statements)

References 41 publications

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“…In order to deeply comprehend the photocatalytic mechanism, the corresponding reaction kinetics (i.e., K) are estimated via employing the Langmuir-Hinshelwood model: [48,49]…”

Section: Resultsmentioning

confidence: 99%

“…Significantly, a gradual enhancement is seen in the degradation rate as the irradiation time increases. Herein, after irradiating for 360 min via use of visible light, the photocatalytic degradation rates of RhB dye by using the prepared compounds of BiOF In order to deeply comprehend the photocatalytic mechanism, the corresponding reaction kinetics (i.e., K) are estimated via employing the Langmuir-Hinshelwood model: [48,49]…”

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

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Facile Realization of Boosted Near‐Infrared‐Visible Light Driven Photocatalytic Activities of BiOF Nanoparticles through Simultaneously Exploiting Doping and Upconversion Strategy

Ran

Wang

et al. 2021

Adv Materials Inter

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In spite of this, one of the unavoidable issues of photocatalysis is how to take advantage of solar energy efficiently. As we know, the sunlight can be roughly divided into three parts, that is, ultraviolet, visible and near-infrared (NIR) light, in which they take around 5%, 45%, and 50% energy of the sunlight, respectively. [6,7] To date, these widely used photocatalysts, such as ZnO, WO 3 , and TiO 2 , suffer from narrow absorption edge, where the energy originating from visible and NIR light is wasted, resulting in dissatisfied photocatalytic properties. [8][9][10] In order to tackle this shortage, researchers tried to find out other semiconductors and some nano-sized compounds, such as CaAl 5 Fe 7 O 19 , ZnS-CdS, and SiO 2 -TiO 2 , which were promising candidates for photocatalytic and antibacterial applications, were proposed. [11][12][13][14] Thereby, searching for novel semiconductors is a facile and efficient route to develop highly efficient photocatalytic materials.Over the last decades, considerable attention has been attracted in bismuth containing semiconductors since they exhibit promising applications in photocatalysis owing to their superiorities including high stability, suitable energy band gap (i.e., E g ), and nontoxicity. [15,16] Shi et al. reported that the Bi 5 OI 7 and BiO 5 I 2 semiconductors with admirable photocatalytic activities can utilize both ultraviolet and visible lights. [17] As a member of bismuth containing semiconductors, the investigation on the photocatalytic properties of BiOX (X = F, Cl, Br, and I), which displays unique matlockite structure with [XBiOOBiX] layers, has been intensively performed. [18,19] Particularly, with the help of weak nonbonding van der Waals interaction along the c-axis, [Bi 2 O 2 ] 2+ slabs with positive valence are interleaved by means of two halide ions, leading to the production of internal electric field along the caxis. [18] Note that, the occurrence of the internal electric field enables the separation of electron-hole pairs more efficiently which gives rise to admirable photocatalytic behaviors of BiOX. At present, it has been revealed that the BiOX compounds can capture both ultraviolet and visible lights to photodegrade pollutants (i.e., RhB, methyl orange). [20,21] Nevertheless, these currently developed BiOX photocatalysts still own some deficiencies, such as the harvest of NIR light is insufficient and A facile strategy is put forward to improve the photocatalytic activity of BiOF nanoparticles by simultaneously exploiting doping and upconversion engineering. The Er 3+ /Yb 3+ -codoped BiOF nanoparticles are synthesized via using high-temperature solid-state reaction route. Through employing firstprinciples density functional theory, one knows that the electronic structure of BiOF host is greatly impacted by Er 3+ and Yb 3+ ions doping. Excited by 980 nm, bright upconversion emissions are seen in prepared compounds and their maximum intensities are obtained when x = 0.04. Furthermore, the photocatalytic capacity of the designed n...

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“…In order to deeply comprehend the photocatalytic mechanism, the corresponding reaction kinetics (i.e., K) are estimated via employing the Langmuir-Hinshelwood model: [48,49]…”

Section: Resultsmentioning

confidence: 99%

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

Facile Realization of Boosted Near‐Infrared‐Visible Light Driven Photocatalytic Activities of BiOF Nanoparticles through Simultaneously Exploiting Doping and Upconversion Strategy

Ran

Wang

et al. 2021

Adv Materials Inter

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“…In recent decades, the interest of researchers in the study of the structure and properties of bismuthates of various alkaline earth metals has increased: magnesium [1][2][3][4][5], calcium [6][7][8][9][10][11][12][13][14][15], strontium and barium [28][29][30][31][32][33][34][35][36][37][38]. One of the most promising areas of their application is heterogeneous photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

“…Second, it was shown in a number of works [39,40] that this class of semiconductor materials can be distinguished into a separate class of photoactive materials with an atypical dependence of the potentials of the energy bands (valence and conduction bands) on the band gap. These two factors make it possible to use alkaline earth metal bismuthates for photocatalytic mineralization of organic hydro-and aeropollutants [3,5,6,10,19,24,26], photolysis of water [7,8,35,36], synthesis of solar fuel due to reduction of carbon dioxide in the presence of water [31,38], selective reduction of metal ions from solutions [41], or direct conversion of solar energy into electrical energy [37]. Separately, we can highlight the work on the study of the antibacterial activity of bismuthates of alkaline earth metals [17,19].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Type and Concentration of the Dopant on the Photocatalytic Activity of Strontium Bismuthate Sr2Bi2O5

Shtarev

Kirichenko

Shtareva

et al. 2023

KEM

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The paper investigates the optical and photocatalytic properties of strontium bismuthate doped with various rare earth elements. The data presented indicate that the type and concentration of the dopant have different effects on such parameters of a given semiconductor photocatalyst, such as the optical bandgap, absorption in the intrinsic area, and photocatalytic activity. On the basis of the studies carried out, the most promising rare earth elements have been identified and their optimal concentrations have been established for doping alkaline earth metal bismuthates.

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“…Metal-ion-doped functional semiconductors are promising candidates due to their extensive applications and potential economic impacts. It is a well-acknowledged fact that by a well-designed crystal structure, chemical composition, and surface features, semiconductors generally have unexpected catalytic activities. − For example, the crystal structure and chemical composition have a tremendous influence on the static potential in unit cells, causing a change in catalytic activities. , Extensive theoretical and experimental studies are dedicated to tailoring the natural characteristic of semiconductors according to doping engineering, nonstoichiometric chemical composition, phase structure, particle size, and surface features for modulation of band-gap values, electronic properties, and fundamental structural and catalytic performance. For example, Huang’s research group prepared Fe-doped CeO 2 solid solutions with different amounts of Fe by coprecipitation for the selective chemisorption of a dye .…”

Section: Introductionmentioning

confidence: 99%

Photosynergy of Ag In Situ Anchored on AgNb_1–xTa_xO₃ Solid Solutions as an Efficient and Durable Catalyst toward Nitrobenzene Reduction: Uncovering the Relevance of the Electronic Structure, Active Sites, and Catalytic Activity

et al. 2020

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The present work reports a solid-state method to synthesize homologous Ta-doped AgNbO3 with a controllable structure for the reduction of p-nitrophenol (p-NP). With a tunable molar ratio of Nb/Ta, the as-synthesized solid solutions exhibit tunable band gaps, lattice constriction, reduced work functions, and phase transformation from orthorhombic AgNbO3 to rhombohedral AgTaO3. All samples were carefully characterized by powder X-ray diffraction, transmission electron microscopy, UV–vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. It is found that partial Ag+ ions in AgNb1–x Ta x O3 solid solutions are in situ converted into metallic silver to form a Ag0/AgNb1–x Ta x O3 heterostructure in the presence of excess NaBH4 during the reduction of p-NP. The doping effects on the crystal, electronic structure, the work function of AgNb1–x Ta x O3 and the underlying catalytic mechanism are studied both experimentally and theoretically. It is discovered that the interfacial charge transfer processes can be regulated by nonstoichiometric doping. By virtue of well-modulated electronic structures and overwhelming endurance, the turnover frequency of the AgTaO3 semiconductor for p-NP reduction is estimated to be 1.09 × 104, approximately 12.5 times larger than that of AgNbO3.

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Effect of Composition on the Optical and Photocatalytic Properties of Visible Light Responsive Materials Bi_26–xMg_xO₄₀

Cited by 9 publications

References 41 publications

Facile Realization of Boosted Near‐Infrared‐Visible Light Driven Photocatalytic Activities of BiOF Nanoparticles through Simultaneously Exploiting Doping and Upconversion Strategy

Facile Realization of Boosted Near‐Infrared‐Visible Light Driven Photocatalytic Activities of BiOF Nanoparticles through Simultaneously Exploiting Doping and Upconversion Strategy

Influence of the Type and Concentration of the Dopant on the Photocatalytic Activity of Strontium Bismuthate Sr<sub>2</sub>Bi<sub>2</sub>O<sub>5</sub>

Photosynergy of Ag In Situ Anchored on AgNb_1–xTa_xO₃ Solid Solutions as an Efficient and Durable Catalyst toward Nitrobenzene Reduction: Uncovering the Relevance of the Electronic Structure, Active Sites, and Catalytic Activity

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Effect of Composition on the Optical and Photocatalytic Properties of Visible Light Responsive Materials Bi26–xMgxO40

Cited by 9 publications

References 41 publications

Facile Realization of Boosted Near‐Infrared‐Visible Light Driven Photocatalytic Activities of BiOF Nanoparticles through Simultaneously Exploiting Doping and Upconversion Strategy

Facile Realization of Boosted Near‐Infrared‐Visible Light Driven Photocatalytic Activities of BiOF Nanoparticles through Simultaneously Exploiting Doping and Upconversion Strategy

Influence of the Type and Concentration of the Dopant on the Photocatalytic Activity of Strontium Bismuthate Sr<sub>2</sub>Bi<sub>2</sub>O<sub>5</sub>

Photosynergy of Ag In Situ Anchored on AgNb1–xTaxO3 Solid Solutions as an Efficient and Durable Catalyst toward Nitrobenzene Reduction: Uncovering the Relevance of the Electronic Structure, Active Sites, and Catalytic Activity

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Effect of Composition on the Optical and Photocatalytic Properties of Visible Light Responsive Materials Bi_26–xMg_xO₄₀

Photosynergy of Ag In Situ Anchored on AgNb_1–xTa_xO₃ Solid Solutions as an Efficient and Durable Catalyst toward Nitrobenzene Reduction: Uncovering the Relevance of the Electronic Structure, Active Sites, and Catalytic Activity