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Hybrid Bi2SiO5 mesoporous microspheres with light response for environment decontamination

Paper ID Volume ID Publish Year Pages File Format Full-Text
47148 46462 2010 5 PDF Available
Title
Hybrid Bi2SiO5 mesoporous microspheres with light response for environment decontamination
Abstract

A hybrid mesostructured photocatalyst prepared by using the “postsynthetic modification” approach with the periodic mesoporous organosilicas (PMO) framework and bismuth nitrate was studied. The morphology and structure of the hybrid Bi2SiO5 photocatalyst were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and N2 adsorption–desorption isotherms. These results of characterization show that the as-prepared Bi2SiO5 keeps a semi-ordered mesostructure as the PMO framework. The results of density functional theory calculations indicated that the conduction band bottom of Bi2SiO5 mainly consist of Bi 6s orbits and O 2p, O 2s, while the valence band top mainly consist of Si 3p, O 2p, and Bi 5d orbits. The as-prepared Bi2SiO5 exhibited efficient photocatalytic activity in the decomposition of a widely used dye, tetraethylated rhodamine (RhB), and phenol in water under the simulative sunlight irradiation. Further, the photocatalytic experiment results show that the hybrid Bi2SiO5 synthesized based on PMO was more efficient than the pure mesoporous Bi2SiO5 in decomposing the organic pollutant, which means the hybrid organic groups dispersed in the PMO framework is advantageous to improve the efficiency of the photocatalyst.

Graphical abstractA hybrid mesostructured Bi2SiO5 photocatalyst prepared by using the “postsynthetic modification” approach with the periodic mesoporous organosilicas (PMO) framework and bismuth nitrate was studied. The as-prepared Bi2SiO5 exhibited efficient photocatalytic activity in the decomposition of a widely used dye, tetraethylated rhodamine (RhB), and phenol in water under the simulative sunlight irradiation.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights▶ Synthesis of a novel mesoporous photocatalyst, hybrid Bi2SiO5 mesoporous hollow microsphere. ▶ The as-prepared Bi2SiO5 exhibited efficient photocatalytic activity in the decomposition of dye and phenol in water under the simulative sunlight irradiation. ▶ The uniform distribution of functional –CH2–CH2– groups inside the pore wall was advantageous for transporting photo-generated carrier-charges due to its lower Fermi energy.

Keywords
Mesostructure; Bi2SiO5; Photocatalyst; Periodic mesoporous organosilicas
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Hybrid Bi2SiO5 mesoporous microspheres with light response for environment decontamination
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 100, Issues 1–2, 11 October 2010, Pages 97–101
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us