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Copyright of Journal of China University of Petroleum is the property of China University of Petroleum and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Natural Gas Geoscience is the property of Natural Gas Geoscience and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To explore the effect of heterojunction on photocatalytic activity, pure Bi5O7NO3,α-Bi2O3Chanel triphase heterojunction were synthesized using hydrothermal method with Bi(N03)3 • 5H2O as raw materiaL X-ray diffraction (XRD), Raman spectroscopy, high resolution transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were used to characterize the crystal structures and phase compositions. The result showed that after 90 min light irradiation of 250 W mercury lamps, the Rhodamine B degradation efficiency of heterojunction and Bi5O7NO3 are 98. 1% and 89. 9%. The values are far higher thanα-Bi203 25% and &@946;-Bi203 45%. The methyl orange degradation efficiency of these two samples are about 90%, faster than 77% ofα-Bi2O3 and 86% of β-Bi2O3. According to band gap and Mott-Schottky curve, Bi5O7NO3, α- and β-Bi2O3 form a staggered energy band configuration. Photogenerated electrons transfer from the conduction band of Bi5O7NO3 to the α-Bi2O3 and β-Bi2O3 conduction bands in tuni. The electron and hole is separated to improve the photocatalytic activity. Scanning electron microscopy (SEM) and diffuse reflectance spectroscopy show that the morphology and double absorption further enhance the photocatalytic activity. Therefore high activityBi5O7 NO3 photocatalyzer is in situ grown. [ABSTRACT FROM AUTHOR]

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)