Structure, Optical, and Catalytic Properties of Novel Hexagonal Metastable h-MoO3 Nano- and Microrods Synthesized with Modified Liquid-Phase Processes

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	Structure, Optical, and Catalytic Properties of Novel Hexagonal Metastable h-MoO3 Nano- and Microrods Synthesized with Modified Liquid-Phase Processes
	Pan, WZ ; Tian, RY ; Jin, H ; Guo, YJ ; Zhang, LP ; Wu, XC ; Zhang, LN ; Han, ZH ; Liu, GY ; Li, JB ; Rao, GH ; Wang, HF ; Chu, WG
刊名	CHEMISTRY OF MATERIALS
	2010
卷号	22 期号:22 页码:6202
关键词	CRYSTAL MOLYBDENUM TRIOXIDE LOW-TEMPERATURE SYNTHESIS OXIDATIVE DEHYDROGENATION RAMAN-SPECTROSCOPY MOO3 MORPHOLOGY NANOBELTS GROWTH OXIDES NANOPARTICLES
ISSN号	0897-4756
中文摘要	Single crystalline h-MoO3 nano- and microrods were successfully synthesized using modified liquid-phase processes with concentrated HNO3 and H2SO4. Their X-ray powder diffraction (XRD) data were unambiguously indexed based on a hexagonal structure with the lattice constants a approximate to 10.57 and c approximate to 3.72 angstrom instead of a = 10.53 and c = 14.98 angstrom (JCPDS 21-0569) usually adopted. Rietveld refinements of the XRD data were pioneeringly performed based on the (Na center dot 2H(2)O)Mo-5.33-[H-4.5](0.67)O-18 structure with the space group of P6(3)/m regardless of H+ and Na+. Nanorods synthesized under different conditions show different sizes and aspect ratios. Annealing at 300 degrees C for 3 h significantly improves the crystallinity and phase purity of as-synthesized h-MoO3 rods, which is evidenced by sharpening of peaks in micro-Raman spectra with no shift. An irreversible transition from h-MoO3 to alpha-MoO3 occurring between 413 and 436 degrees C can be triggered by irradiation of either electrons or laser with high energies or powers as well. The turning points on both differential thermal analysis (DTA) and thermogravimetry (TG) curves show presence of water molecules interacted differently with the lattice which escape at different temperatures. h-MoO3 rods reduce the temperatures of soot oxidation to 482-490 degrees C, much higher than its structural transition temperatures. This makes it simply suitable for catalyzing reactions taking place at temperatures lower than the transition temperatures, say, as the catalyst of the selective oxidation of methanol.
收录类别	SCI
资助信息	Ministry of Science and Technology of China [2006CB932602]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/53634]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Pan, WZ,Tian, RY,Jin, H,et al. Structure, Optical, and Catalytic Properties of Novel Hexagonal Metastable h-MoO3 Nano- and Microrods Synthesized with Modified Liquid-Phase Processes[J]. CHEMISTRY OF MATERIALS,2010,22(22):6202.
APA	Pan, WZ.,Tian, RY.,Jin, H.,Guo, YJ.,Zhang, LP.,...&Chu, WG.(2010).Structure, Optical, and Catalytic Properties of Novel Hexagonal Metastable h-MoO3 Nano- and Microrods Synthesized with Modified Liquid-Phase Processes.CHEMISTRY OF MATERIALS,22(22),6202.
MLA	Pan, WZ,et al."Structure, Optical, and Catalytic Properties of Novel Hexagonal Metastable h-MoO3 Nano- and Microrods Synthesized with Modified Liquid-Phase Processes".CHEMISTRY OF MATERIALS 22.22(2010):6202.