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Yoshiyuki Sugahara - One of the best experts on this subject based on the ideXlab platform.
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a layered tungstic acid h2w2o7 nh2o with a double octahedral sheet structure Conversion Process from an aurivillius phase bi2w2o9 and structural characterization
Inorganic Chemistry, 2003Co-Authors: Manabu Kudo, Wataru Sugimoto, Hajime Ohkawa, Nobuhiro Kumada, Zheng Liu, Osamu Terasaki, Yoshiyuki SugaharaAbstract:The Conversion Process of an Aurivillius phase, Bi2W2O9, into a layered tungstic acid by hydrochloric acid treatment has been investigated, and resultant H2W2O7·nH2O has been fully characterized. The c parameter of Bi2W2O9 [2.37063(5) nm] decreases to 2.21(1) nm in an acid-treated product dried at ambient temperature. The a and b parameters of Bi2W2O9 [a = 0.54377(1) nm and b = 0.54166(1) nm] also decrease slightly to a = 0.524(1) nm and b = 0.513(1) nm in the acid-treated product dried at ambient temperature, indicating structural changes in the ReO3-like slabs in Bi2W2O9 upon acid treatment. Drying at 120 °C leads to a further decrease in the c parameter [1.86(1) nm] with no notable change in the a and b parameters [a = 0.5249(2) nm and b = 0.513(2) nm]. The formation of an expandable layered structure is demonstrated by the successful intercalation of n-octylamine [interlayer distance 2.597(9) nm] and n-dodecylamine [interlayer distance 3.56(2) nm]. The compositions of the acid-treated products are det...
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a layered tungstic acid h2w2o7 nh2o with a double octahedral sheet structure Conversion Process from an aurivillius phase bi2w2o9 and structural characterization
Inorganic Chemistry, 2003Co-Authors: Manabu Kudo, Wataru Sugimoto, Hajime Ohkawa, Nobuhiro Kumada, Zheng Liu, Osamu Terasaki, Yoshiyuki SugaharaAbstract:The Conversion Process of an Aurivillius phase, Bi(2)W(2)O(9), into a layered tungstic acid by hydrochloric acid treatment has been investigated, and resultant H(2)W(2)O(7) x nH(2)O has been fully characterized. The c parameter of Bi(2)W(2)O(9) [2.37063(5) nm] decreases to 2.21(1) nm in an acid-treated product dried at ambient temperature. The a and b parameters of Bi(2)W(2)O(9) [a = 0.54377(1) nm and b = 0.54166(1) nm] also decrease slightly to a = 0.524(1) nm and b = 0.513(1) nm in the acid-treated product dried at ambient temperature, indicating structural changes in the ReO(3)-like slabs in Bi(2)W(2)O(9) upon acid treatment. Drying at 120 degrees C leads to a further decrease in the c parameter [1.86(1) nm] with no notable change in the a and b parameters [a = 0.5249(2) nm and b = 0.513(2) nm]. The formation of an expandable layered structure is demonstrated by the successful intercalation of n-octylamine [interlayer distance 2.597(9) nm] and n-dodecylamine [interlayer distance 3.56(2) nm]. The compositions of the acid-treated products are determined to be H(2)W(2)O(7) x nH(2)O typically with n = 0.58 for the air-dried product and n = 0 for the product dried at 120 degrees C. As a consequence, the composition of the layer is H(2)W(2)O(7), and the decrease in the c parameter upon drying is ascribable to the loss of interlayer water. Scanning electron microscopy reveals no morphological change during acid treatment, which strongly suggests a selective leaching of the bismuth oxide sheets as a reaction mechanism. High-resolution transmission electron microscopy (HREM) observation of the acid-treated product shows consistency with a structural model for H(2)W(2)O(7), derived from Bi(2)W(2)O(9) through removal of the bismuth oxide sheets and contraction along the c axis. HREM observation also reveals that the WO(6) octahedra arrangement changes slightly with acid treatment. A one-dimensional electron density map projected on the c axis for the product dried at 120 degrees C, H(2)W(2)O(7), shows good consistency with that calculated for the structural model.
Osamu Terasaki - One of the best experts on this subject based on the ideXlab platform.
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a layered tungstic acid h2w2o7 nh2o with a double octahedral sheet structure Conversion Process from an aurivillius phase bi2w2o9 and structural characterization
Inorganic Chemistry, 2003Co-Authors: Manabu Kudo, Wataru Sugimoto, Hajime Ohkawa, Nobuhiro Kumada, Zheng Liu, Osamu Terasaki, Yoshiyuki SugaharaAbstract:The Conversion Process of an Aurivillius phase, Bi2W2O9, into a layered tungstic acid by hydrochloric acid treatment has been investigated, and resultant H2W2O7·nH2O has been fully characterized. The c parameter of Bi2W2O9 [2.37063(5) nm] decreases to 2.21(1) nm in an acid-treated product dried at ambient temperature. The a and b parameters of Bi2W2O9 [a = 0.54377(1) nm and b = 0.54166(1) nm] also decrease slightly to a = 0.524(1) nm and b = 0.513(1) nm in the acid-treated product dried at ambient temperature, indicating structural changes in the ReO3-like slabs in Bi2W2O9 upon acid treatment. Drying at 120 °C leads to a further decrease in the c parameter [1.86(1) nm] with no notable change in the a and b parameters [a = 0.5249(2) nm and b = 0.513(2) nm]. The formation of an expandable layered structure is demonstrated by the successful intercalation of n-octylamine [interlayer distance 2.597(9) nm] and n-dodecylamine [interlayer distance 3.56(2) nm]. The compositions of the acid-treated products are det...
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a layered tungstic acid h2w2o7 nh2o with a double octahedral sheet structure Conversion Process from an aurivillius phase bi2w2o9 and structural characterization
Inorganic Chemistry, 2003Co-Authors: Manabu Kudo, Wataru Sugimoto, Hajime Ohkawa, Nobuhiro Kumada, Zheng Liu, Osamu Terasaki, Yoshiyuki SugaharaAbstract:The Conversion Process of an Aurivillius phase, Bi(2)W(2)O(9), into a layered tungstic acid by hydrochloric acid treatment has been investigated, and resultant H(2)W(2)O(7) x nH(2)O has been fully characterized. The c parameter of Bi(2)W(2)O(9) [2.37063(5) nm] decreases to 2.21(1) nm in an acid-treated product dried at ambient temperature. The a and b parameters of Bi(2)W(2)O(9) [a = 0.54377(1) nm and b = 0.54166(1) nm] also decrease slightly to a = 0.524(1) nm and b = 0.513(1) nm in the acid-treated product dried at ambient temperature, indicating structural changes in the ReO(3)-like slabs in Bi(2)W(2)O(9) upon acid treatment. Drying at 120 degrees C leads to a further decrease in the c parameter [1.86(1) nm] with no notable change in the a and b parameters [a = 0.5249(2) nm and b = 0.513(2) nm]. The formation of an expandable layered structure is demonstrated by the successful intercalation of n-octylamine [interlayer distance 2.597(9) nm] and n-dodecylamine [interlayer distance 3.56(2) nm]. The compositions of the acid-treated products are determined to be H(2)W(2)O(7) x nH(2)O typically with n = 0.58 for the air-dried product and n = 0 for the product dried at 120 degrees C. As a consequence, the composition of the layer is H(2)W(2)O(7), and the decrease in the c parameter upon drying is ascribable to the loss of interlayer water. Scanning electron microscopy reveals no morphological change during acid treatment, which strongly suggests a selective leaching of the bismuth oxide sheets as a reaction mechanism. High-resolution transmission electron microscopy (HREM) observation of the acid-treated product shows consistency with a structural model for H(2)W(2)O(7), derived from Bi(2)W(2)O(9) through removal of the bismuth oxide sheets and contraction along the c axis. HREM observation also reveals that the WO(6) octahedra arrangement changes slightly with acid treatment. A one-dimensional electron density map projected on the c axis for the product dried at 120 degrees C, H(2)W(2)O(7), shows good consistency with that calculated for the structural model.
Manabu Kudo - One of the best experts on this subject based on the ideXlab platform.
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a layered tungstic acid h2w2o7 nh2o with a double octahedral sheet structure Conversion Process from an aurivillius phase bi2w2o9 and structural characterization
Inorganic Chemistry, 2003Co-Authors: Manabu Kudo, Wataru Sugimoto, Hajime Ohkawa, Nobuhiro Kumada, Zheng Liu, Osamu Terasaki, Yoshiyuki SugaharaAbstract:The Conversion Process of an Aurivillius phase, Bi2W2O9, into a layered tungstic acid by hydrochloric acid treatment has been investigated, and resultant H2W2O7·nH2O has been fully characterized. The c parameter of Bi2W2O9 [2.37063(5) nm] decreases to 2.21(1) nm in an acid-treated product dried at ambient temperature. The a and b parameters of Bi2W2O9 [a = 0.54377(1) nm and b = 0.54166(1) nm] also decrease slightly to a = 0.524(1) nm and b = 0.513(1) nm in the acid-treated product dried at ambient temperature, indicating structural changes in the ReO3-like slabs in Bi2W2O9 upon acid treatment. Drying at 120 °C leads to a further decrease in the c parameter [1.86(1) nm] with no notable change in the a and b parameters [a = 0.5249(2) nm and b = 0.513(2) nm]. The formation of an expandable layered structure is demonstrated by the successful intercalation of n-octylamine [interlayer distance 2.597(9) nm] and n-dodecylamine [interlayer distance 3.56(2) nm]. The compositions of the acid-treated products are det...
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a layered tungstic acid h2w2o7 nh2o with a double octahedral sheet structure Conversion Process from an aurivillius phase bi2w2o9 and structural characterization
Inorganic Chemistry, 2003Co-Authors: Manabu Kudo, Wataru Sugimoto, Hajime Ohkawa, Nobuhiro Kumada, Zheng Liu, Osamu Terasaki, Yoshiyuki SugaharaAbstract:The Conversion Process of an Aurivillius phase, Bi(2)W(2)O(9), into a layered tungstic acid by hydrochloric acid treatment has been investigated, and resultant H(2)W(2)O(7) x nH(2)O has been fully characterized. The c parameter of Bi(2)W(2)O(9) [2.37063(5) nm] decreases to 2.21(1) nm in an acid-treated product dried at ambient temperature. The a and b parameters of Bi(2)W(2)O(9) [a = 0.54377(1) nm and b = 0.54166(1) nm] also decrease slightly to a = 0.524(1) nm and b = 0.513(1) nm in the acid-treated product dried at ambient temperature, indicating structural changes in the ReO(3)-like slabs in Bi(2)W(2)O(9) upon acid treatment. Drying at 120 degrees C leads to a further decrease in the c parameter [1.86(1) nm] with no notable change in the a and b parameters [a = 0.5249(2) nm and b = 0.513(2) nm]. The formation of an expandable layered structure is demonstrated by the successful intercalation of n-octylamine [interlayer distance 2.597(9) nm] and n-dodecylamine [interlayer distance 3.56(2) nm]. The compositions of the acid-treated products are determined to be H(2)W(2)O(7) x nH(2)O typically with n = 0.58 for the air-dried product and n = 0 for the product dried at 120 degrees C. As a consequence, the composition of the layer is H(2)W(2)O(7), and the decrease in the c parameter upon drying is ascribable to the loss of interlayer water. Scanning electron microscopy reveals no morphological change during acid treatment, which strongly suggests a selective leaching of the bismuth oxide sheets as a reaction mechanism. High-resolution transmission electron microscopy (HREM) observation of the acid-treated product shows consistency with a structural model for H(2)W(2)O(7), derived from Bi(2)W(2)O(9) through removal of the bismuth oxide sheets and contraction along the c axis. HREM observation also reveals that the WO(6) octahedra arrangement changes slightly with acid treatment. A one-dimensional electron density map projected on the c axis for the product dried at 120 degrees C, H(2)W(2)O(7), shows good consistency with that calculated for the structural model.
Julien Fatome - One of the best experts on this subject based on the ideXlab platform.
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multiple modal and wavelength Conversion Process of a 10 gbit s signal in a 6 lp mode fiber
Optics Express, 2019Co-Authors: H Zhang, Marianne Bigotastruc, Laurent Bigot, Pierre Sillard, Julien FatomeAbstract:We demonstrate experimentally a simultaneous threefold modal and wavelength Conversion Process of a 10-Gbit/s On/Off keying signal in a 1.8-km long graded-index 6-LP-mode fiber. The principle of operation is based on a phase-matched inter-modal four-wave mixing phenomenon occurring between the fundamental mode and 3 higher-order modes of the fiber. The converted signals show well-opened eye-diagrams and error-free Processing.
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multiple modal and wavelength Conversion Process of a 10 gbit s signal in a 6 lp mode fiber
Conference on Lasers and Electro-Optics, 2019Co-Authors: H Zhang, Marianne Bigotastruc, Laurent Bigot, Pierre Sillard, Julien FatomeAbstract:We experimentally demonstrate a simultaneous threefold modal and wavelength Conversion Process of a 10-Gbit/s NRZ signal in a 1.8-km long 6-LP-mode fiber. The principle of operation is based on a phase-matched inter-modal four-wave mixing phenomenon.
Wataru Sugimoto - One of the best experts on this subject based on the ideXlab platform.
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a layered tungstic acid h2w2o7 nh2o with a double octahedral sheet structure Conversion Process from an aurivillius phase bi2w2o9 and structural characterization
Inorganic Chemistry, 2003Co-Authors: Manabu Kudo, Wataru Sugimoto, Hajime Ohkawa, Nobuhiro Kumada, Zheng Liu, Osamu Terasaki, Yoshiyuki SugaharaAbstract:The Conversion Process of an Aurivillius phase, Bi2W2O9, into a layered tungstic acid by hydrochloric acid treatment has been investigated, and resultant H2W2O7·nH2O has been fully characterized. The c parameter of Bi2W2O9 [2.37063(5) nm] decreases to 2.21(1) nm in an acid-treated product dried at ambient temperature. The a and b parameters of Bi2W2O9 [a = 0.54377(1) nm and b = 0.54166(1) nm] also decrease slightly to a = 0.524(1) nm and b = 0.513(1) nm in the acid-treated product dried at ambient temperature, indicating structural changes in the ReO3-like slabs in Bi2W2O9 upon acid treatment. Drying at 120 °C leads to a further decrease in the c parameter [1.86(1) nm] with no notable change in the a and b parameters [a = 0.5249(2) nm and b = 0.513(2) nm]. The formation of an expandable layered structure is demonstrated by the successful intercalation of n-octylamine [interlayer distance 2.597(9) nm] and n-dodecylamine [interlayer distance 3.56(2) nm]. The compositions of the acid-treated products are det...
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a layered tungstic acid h2w2o7 nh2o with a double octahedral sheet structure Conversion Process from an aurivillius phase bi2w2o9 and structural characterization
Inorganic Chemistry, 2003Co-Authors: Manabu Kudo, Wataru Sugimoto, Hajime Ohkawa, Nobuhiro Kumada, Zheng Liu, Osamu Terasaki, Yoshiyuki SugaharaAbstract:The Conversion Process of an Aurivillius phase, Bi(2)W(2)O(9), into a layered tungstic acid by hydrochloric acid treatment has been investigated, and resultant H(2)W(2)O(7) x nH(2)O has been fully characterized. The c parameter of Bi(2)W(2)O(9) [2.37063(5) nm] decreases to 2.21(1) nm in an acid-treated product dried at ambient temperature. The a and b parameters of Bi(2)W(2)O(9) [a = 0.54377(1) nm and b = 0.54166(1) nm] also decrease slightly to a = 0.524(1) nm and b = 0.513(1) nm in the acid-treated product dried at ambient temperature, indicating structural changes in the ReO(3)-like slabs in Bi(2)W(2)O(9) upon acid treatment. Drying at 120 degrees C leads to a further decrease in the c parameter [1.86(1) nm] with no notable change in the a and b parameters [a = 0.5249(2) nm and b = 0.513(2) nm]. The formation of an expandable layered structure is demonstrated by the successful intercalation of n-octylamine [interlayer distance 2.597(9) nm] and n-dodecylamine [interlayer distance 3.56(2) nm]. The compositions of the acid-treated products are determined to be H(2)W(2)O(7) x nH(2)O typically with n = 0.58 for the air-dried product and n = 0 for the product dried at 120 degrees C. As a consequence, the composition of the layer is H(2)W(2)O(7), and the decrease in the c parameter upon drying is ascribable to the loss of interlayer water. Scanning electron microscopy reveals no morphological change during acid treatment, which strongly suggests a selective leaching of the bismuth oxide sheets as a reaction mechanism. High-resolution transmission electron microscopy (HREM) observation of the acid-treated product shows consistency with a structural model for H(2)W(2)O(7), derived from Bi(2)W(2)O(9) through removal of the bismuth oxide sheets and contraction along the c axis. HREM observation also reveals that the WO(6) octahedra arrangement changes slightly with acid treatment. A one-dimensional electron density map projected on the c axis for the product dried at 120 degrees C, H(2)W(2)O(7), shows good consistency with that calculated for the structural model.