The Experts below are selected from a list of 50409 Experts worldwide ranked by ideXlab platform
Huijuan Liu - One of the best experts on this subject based on the ideXlab platform.
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enhanced photoreduction of chromium vi intercalated ion exchange in biobr0 75i0 25 Layers structure by bulk charge transfer
ACS Sustainable Chemistry & Engineering, 2019Co-Authors: Gong Zhang, Huachun Lan, Huijuan LiuAbstract:Because of its low separating and utilizing efficiency of photogenerated charges in the bulk, the application of photocatalytic technique has been restricted for decades. In this paper, based on interLayer ion-exchange between BiOBr0.75I0.25 Layers, we demonstrated a specific interfacial process of photocatalytic Cr(VI) reduction by a direct bulk-charge transfer. The results showed that Cr(VI) was effectively converted to nontoxic Cr(III), even under neutral conditions (pH 7.0). According to ultraviolet–visible (UV-vis) spectroscopy, powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis, the CrO42– anion was readily intercalated into the anion Lattice Layer of BiOBr0.75I0.25 by ion exchange with OH– in the interLayer, forming a ═Bi–O–CrO3– complex. Electron paramagnetic resonance (EPR) and photoelectron-chemistry measurements further revealed that excitation of ═Bi–O–CrO3– by irradiation was crucial for photocatalytic detoxification of Cr(VI) under pH 7.0. The excitation of ═B...
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Enhanced Photoreduction of Chromium(VI) Intercalated Ion Exchange in BiOBr0.75I0.25 Layers Structure by Bulk Charge Transfer
2018Co-Authors: Gong Zhang, Huachun Lan, Huijuan LiuAbstract:Because of its low separating and utilizing efficiency of photogenerated charges in the bulk, the application of photocatalytic technique has been restricted for decades. In this paper, based on interLayer ion-exchange between BiOBr0.75I0.25 Layers, we demonstrated a specific interfacial process of photocatalytic Cr(VI) reduction by a direct bulk-charge transfer. The results showed that Cr(VI) was effectively converted to nontoxic Cr(III), even under neutral conditions (pH 7.0). According to ultraviolet–visible (UV-vis) spectroscopy, powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis, the CrO42– anion was readily intercalated into the anion Lattice Layer of BiOBr0.75I0.25 by ion exchange with OH– in the interLayer, forming a Bi–O–CrO3– complex. Electron paramagnetic resonance (EPR) and photoelectron-chemistry measurements further revealed that excitation of Bi–O–CrO3– by irradiation was crucial for photocatalytic detoxification of Cr(VI) under pH 7.0. The excitation of Bi–O–CrO3– in BiOBr0.75I0.25 strengthened the bulk-charge transfer as follows: (i) electron transfer from O–II to CrVI produced CrV and O–I, respectively, via ligand-to-metal charge transfer excitation; and (ii) electron injection from BiOBr0.75I0.25 to [Bi–O––CrVO3–]* (or leaving holes in valence band) resulted in the reduction of Cr(V) to Cr(III). After that, the newly formed Cr(III) in the interLayer of BiOBr0.75I0.25 was deintercalated into solution due to the space charge repulsion between Cr3+ and Bi2O22+ slab, resulting in stable Cr(VI) reduction performance in a wide pH range from 2.0 to 7.0
Gong Zhang - One of the best experts on this subject based on the ideXlab platform.
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enhanced photoreduction of chromium vi intercalated ion exchange in biobr0 75i0 25 Layers structure by bulk charge transfer
ACS Sustainable Chemistry & Engineering, 2019Co-Authors: Gong Zhang, Huachun Lan, Huijuan LiuAbstract:Because of its low separating and utilizing efficiency of photogenerated charges in the bulk, the application of photocatalytic technique has been restricted for decades. In this paper, based on interLayer ion-exchange between BiOBr0.75I0.25 Layers, we demonstrated a specific interfacial process of photocatalytic Cr(VI) reduction by a direct bulk-charge transfer. The results showed that Cr(VI) was effectively converted to nontoxic Cr(III), even under neutral conditions (pH 7.0). According to ultraviolet–visible (UV-vis) spectroscopy, powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis, the CrO42– anion was readily intercalated into the anion Lattice Layer of BiOBr0.75I0.25 by ion exchange with OH– in the interLayer, forming a ═Bi–O–CrO3– complex. Electron paramagnetic resonance (EPR) and photoelectron-chemistry measurements further revealed that excitation of ═Bi–O–CrO3– by irradiation was crucial for photocatalytic detoxification of Cr(VI) under pH 7.0. The excitation of ═B...
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Enhanced Photoreduction of Chromium(VI) Intercalated Ion Exchange in BiOBr0.75I0.25 Layers Structure by Bulk Charge Transfer
2018Co-Authors: Gong Zhang, Huachun Lan, Huijuan LiuAbstract:Because of its low separating and utilizing efficiency of photogenerated charges in the bulk, the application of photocatalytic technique has been restricted for decades. In this paper, based on interLayer ion-exchange between BiOBr0.75I0.25 Layers, we demonstrated a specific interfacial process of photocatalytic Cr(VI) reduction by a direct bulk-charge transfer. The results showed that Cr(VI) was effectively converted to nontoxic Cr(III), even under neutral conditions (pH 7.0). According to ultraviolet–visible (UV-vis) spectroscopy, powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis, the CrO42– anion was readily intercalated into the anion Lattice Layer of BiOBr0.75I0.25 by ion exchange with OH– in the interLayer, forming a Bi–O–CrO3– complex. Electron paramagnetic resonance (EPR) and photoelectron-chemistry measurements further revealed that excitation of Bi–O–CrO3– by irradiation was crucial for photocatalytic detoxification of Cr(VI) under pH 7.0. The excitation of Bi–O–CrO3– in BiOBr0.75I0.25 strengthened the bulk-charge transfer as follows: (i) electron transfer from O–II to CrVI produced CrV and O–I, respectively, via ligand-to-metal charge transfer excitation; and (ii) electron injection from BiOBr0.75I0.25 to [Bi–O––CrVO3–]* (or leaving holes in valence band) resulted in the reduction of Cr(V) to Cr(III). After that, the newly formed Cr(III) in the interLayer of BiOBr0.75I0.25 was deintercalated into solution due to the space charge repulsion between Cr3+ and Bi2O22+ slab, resulting in stable Cr(VI) reduction performance in a wide pH range from 2.0 to 7.0
J A Eades - One of the best experts on this subject based on the ideXlab platform.
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use of reciprocal Lattice Layer spacing in electron backscatter diffraction pattern analysis
Ultramicroscopy, 2000Co-Authors: Joseph R Michael, J A EadesAbstract:In the scanning electron microscope using electron backscattered diffraction, it is possible to measure the spacing of the Layers in the reciprocal Lattice. These values are of great use in confirming the identification of phases. The technique derives the Layer spacing from the higher-order Laue zone rings which appear in patterns from many materials. The method adapts results from convergent-beam electron diffraction in the transmission electron microscope. For many materials the measured Layer spacing compares well with the calculated Layer spacing. A noted exception is for higher atomic number materials. In these cases an extrapolation procedure is described that requires Layer spacing measurements at a range of accelerating voltages. This procedure is shown to improve the accuracy of the technique significantly. The application of Layer spacing measurements in EBSD is shown to be of use for the analysis of two polytypes of SiC.
Huachun Lan - One of the best experts on this subject based on the ideXlab platform.
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enhanced photoreduction of chromium vi intercalated ion exchange in biobr0 75i0 25 Layers structure by bulk charge transfer
ACS Sustainable Chemistry & Engineering, 2019Co-Authors: Gong Zhang, Huachun Lan, Huijuan LiuAbstract:Because of its low separating and utilizing efficiency of photogenerated charges in the bulk, the application of photocatalytic technique has been restricted for decades. In this paper, based on interLayer ion-exchange between BiOBr0.75I0.25 Layers, we demonstrated a specific interfacial process of photocatalytic Cr(VI) reduction by a direct bulk-charge transfer. The results showed that Cr(VI) was effectively converted to nontoxic Cr(III), even under neutral conditions (pH 7.0). According to ultraviolet–visible (UV-vis) spectroscopy, powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis, the CrO42– anion was readily intercalated into the anion Lattice Layer of BiOBr0.75I0.25 by ion exchange with OH– in the interLayer, forming a ═Bi–O–CrO3– complex. Electron paramagnetic resonance (EPR) and photoelectron-chemistry measurements further revealed that excitation of ═Bi–O–CrO3– by irradiation was crucial for photocatalytic detoxification of Cr(VI) under pH 7.0. The excitation of ═B...
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Enhanced Photoreduction of Chromium(VI) Intercalated Ion Exchange in BiOBr0.75I0.25 Layers Structure by Bulk Charge Transfer
2018Co-Authors: Gong Zhang, Huachun Lan, Huijuan LiuAbstract:Because of its low separating and utilizing efficiency of photogenerated charges in the bulk, the application of photocatalytic technique has been restricted for decades. In this paper, based on interLayer ion-exchange between BiOBr0.75I0.25 Layers, we demonstrated a specific interfacial process of photocatalytic Cr(VI) reduction by a direct bulk-charge transfer. The results showed that Cr(VI) was effectively converted to nontoxic Cr(III), even under neutral conditions (pH 7.0). According to ultraviolet–visible (UV-vis) spectroscopy, powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis, the CrO42– anion was readily intercalated into the anion Lattice Layer of BiOBr0.75I0.25 by ion exchange with OH– in the interLayer, forming a Bi–O–CrO3– complex. Electron paramagnetic resonance (EPR) and photoelectron-chemistry measurements further revealed that excitation of Bi–O–CrO3– by irradiation was crucial for photocatalytic detoxification of Cr(VI) under pH 7.0. The excitation of Bi–O–CrO3– in BiOBr0.75I0.25 strengthened the bulk-charge transfer as follows: (i) electron transfer from O–II to CrVI produced CrV and O–I, respectively, via ligand-to-metal charge transfer excitation; and (ii) electron injection from BiOBr0.75I0.25 to [Bi–O––CrVO3–]* (or leaving holes in valence band) resulted in the reduction of Cr(V) to Cr(III). After that, the newly formed Cr(III) in the interLayer of BiOBr0.75I0.25 was deintercalated into solution due to the space charge repulsion between Cr3+ and Bi2O22+ slab, resulting in stable Cr(VI) reduction performance in a wide pH range from 2.0 to 7.0
Joseph R Michael - One of the best experts on this subject based on the ideXlab platform.
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use of reciprocal Lattice Layer spacing in electron backscatter diffraction pattern analysis
Ultramicroscopy, 2000Co-Authors: Joseph R Michael, J A EadesAbstract:In the scanning electron microscope using electron backscattered diffraction, it is possible to measure the spacing of the Layers in the reciprocal Lattice. These values are of great use in confirming the identification of phases. The technique derives the Layer spacing from the higher-order Laue zone rings which appear in patterns from many materials. The method adapts results from convergent-beam electron diffraction in the transmission electron microscope. For many materials the measured Layer spacing compares well with the calculated Layer spacing. A noted exception is for higher atomic number materials. In these cases an extrapolation procedure is described that requires Layer spacing measurements at a range of accelerating voltages. This procedure is shown to improve the accuracy of the technique significantly. The application of Layer spacing measurements in EBSD is shown to be of use for the analysis of two polytypes of SiC.