tailieunhanh - Báo cáo hóa học: " Converting Layered Zinc Acetate Nanobelts to One-dimensional Structured ZnO Nanoparticle Aggregates and their Photocatalytic Activity"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Converting Layered Zinc Acetate Nanobelts to One-dimensional Structured ZnO Nanoparticle Aggregates and their Photocatalytic Activity | Nanoscale Res Lett 2008 3 201-204 DOI s11671-008-9136-2 NANO PERSPECTIVES Converting Layered Zinc Acetate Nanobelts to One-dimensional Structured ZnO Nanoparticle Aggregates and their Photocatalytic Activity Ye Zhang Feng Zhu Junxi Zhang Lingli Xia Received 4 May 2008 Accepted 30 May 2008 Published online 18 June 2008 to the authors 2008 Abstract We were successful in synthesizing periodic layered zinc acetate nanobelts through a hydrothermal solution process. One-dimensional structured ZnO nanoparticle aggregate was obtained by simple thermal annealing of the above-mentioned layered ZnO acetate nanobelts at 300 C. The morphology microstructure and composition of the synthesized ZnO and its precursors were characterized by transmission electron microscopy TEM X-ray diffraction XRD and infrared spectroscopy respectively. Low angle X-ray diffraction spectra reveal that as-synthesized zinc acetate has a layered structure with two interlayer d-spacings one is nm and the other is nm . SEM and TEM indicate that nanobelt precursors were 100-200 nm in width and possesses length up to 30 m. Calcination of precursor in air results in the formation of one-dimensional structured ZnO nanoparticle aggregates. In addition the as-prepared ZnO nanoparticle aggregates exhibit high pho-tocatalytic activity for the photocatalytic degradation of methyl orange MO . Keywords Nanostructures Hydrothermal crystal growth Nanomaterials Semiconducting II-VI materials Y. Zhang El F. Zhu J. Zhang Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanostructures Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 People s Republic of China e-mail yezhang@ L. Xia Basic Experiment Center Fundamental Department Artillery Academy Hefei People s Republic of China Introduction ZnO is one of the most important wide band gap at room temperature semiconductors because of its promising potential applications in room