博士后姓名(博士后统一编号)

博士后姓名(博士后统一编号) 2010 China Postdoctoral Forum on Materials Science and Engineering (2010CPFMSE), Zhengzhou University 题目 (Title) 博士后姓名(博士后统一编号) 作者单位 手机: , Email: xxx@xxx.cn 1. 引言(Introduction) Tungsten oxide nanocrystals and films have unique properties and offer wide applications in smart [1] windows, photocatalysts and sensors. 2. 实验部分(Experimental procedure) A mixture of BiO and WO with a molar ratio of 1:2 was calcined in an electric muffle 233ofurnace at ~800C for 2 days to synthesize a layered BiWO compounds. 229 3. 主要结果(Results) Fig.1a shows an XRD pattern of the tungstate-based inorganic-organic hybrid belts with a typical lamellar mesostructure with an interlayer distance of ca. 2.5 nm, consisting of alternant 错误～未找到引用源。错误～未找到引用源。[7][8]inorganic single W–O octahedral nanosheets and organic layers. The XRD pattern (Fig.1b) indicates that the air-dried inorganic species are monoclinic HWO?HO (JCPDS No. 242[4][5]18–1420). The XRD pattern (Fig.1c) of the 120ºC-dried HWO?HO is consistent with an 242 orthorhombic HWO phase (JCPDS No. 43–0679). Fig.1d shows the XRD pattern of the nanoplates 24 obtained by calcining HWOin air at 450ºC for 2 h, and it can be readily indexed to the monoclinic WO 24 3 phase (JCPDS No. 43-1035). Figs.1e-f show FE-SEM images of the obtained HWO and WOnanoplates, 243 respectively. The FE-SEM images indicate that the products consist of thin nanoplates, the apparent thicknesses of which can be estimated to range from 10 to 30 nm. The low-magnification TEM image (Fig.1g) indicates that the calcined product shows a predominant platelike morphology, with a small 2010 China Postdoctoral Forum on Materials Science and Engineering (2010CPFMSE), Zhengzhou University fraction of rolled structures (marked by arrows). A typical HRTEM image (Fig.1h) of the edge of a WO 3 nanoplate indicates that the WOnanoplate is a single crystal. The uniform, wide and ordered diffraction 3 spots in a SAED pattern (the inset Fig.1h) can be assigned to a phase of single-crystal monoclinic WO 3 located along the [001] zone axis. Fig.1i shows a typical result of the photocatalytical performance of the obtained WOnanoplates, and the amount of O generated using the as-obtained WOnanoplates as 3 23 photocatalysts is about one order of magnitude larger than that generated using commercially available oWOpowders. Fig.1j shows a typical sensitive response of the WOnanoplates (calcined at 250 C) upon 3 3 exposure to methanol gas. The sensitivity increases from 20 at 10 ppm to 80 at 300 ppm. The response otimes are very short (less than 5 s working at 360 C), and the recovery times are usually less than 15 s. The WOnanoplates also show high sensitivity to ethanol and butylanol. The enhancement in photocatalysis 3 and sensing ought to be attributed to the super high surface areas of the WO nanoplates (as high as 180 32m/g). 020 001mol100(I),020111202/22000280031022222040004120 200WO nanoplates201-3 222200(d)04060112001220/021002002/13103040 generated / 0032022 Commercial WO powders301300420010051230231005(c)2310200 0.00.51.01.52.02.53.0 Amount of OIrradiation time / h0204 300(J)(b) 200011 o-100offR=22k,～,,,Coff3Methanoloff50Unit: ppmoff 210Relative intensity / (a.u.) (V)off(a)U1 ononononon 10203040500o2, / (Cu K,)0200400600800 Time (s) Fig.1 4. 结论(Conclusions) A novel, national and robust method has been developed to synthesize single-crystal WO nanoplates 3 on the basis of intercalation chemistry and topochemical conversion. The obtained WO nanoplates have 3 super high specific surface areas, which enhanced the photocatalytical and gas-sensing properties. 致谢(Acknowledgements) This work was co-supported. 参考文献(References) [1] a) Y. He, et al., Chem. Mater. 2003, 15, 4039; b) M.-T. Chang, et al., small 2007, 3, 658; c) G. Wang, et al., Chem. B 2006, 110, 23777; d) X. Li, et al., J. Electrochem. Soc. 2006, 153, H133. e) J. Liu, et al., Small 2005, 1, 310; f) J. Zhou, et al., Appl. Phys. Lett. 2005, 87, 223108. g) M. Niederberger, et al., J. Am. Chem. Soc. 2002, 124, 13642; h) M. Feng, et al., Appl. Phys. Lett. 2005, 86, 141901. [2] a) C. L. Dezelah, et al., J. Am. Chem. Soc. 2006, 128, 9638; b) Brezesinski, et al., Small 2006, 2, 1203; b) L. Xiong, T. He, Chem. Mater. 2006, 18, 2211; c) H. Qi, et al., Adv. Mater. 2003, 15, 411; d) J. Polleux, et al., Angew. Chem.,Int. Ed. 2005, 45, 261; e) Y. Baek, K. Yong, J. Phys. Chem. C 2007, 111, 1213. [3] a) A. Wolcott, et al., J. Phys. Chem. B 2006, 110, 25288; b) Y. Oaki, H. Imai, Adv. Mater. 2006, 18, 1807; c) J. Polleux, et al., J. Am. Chem. Soc. 2005, 127, 15595. [4] D. Chen, et al., Small 2008, 4, 1813. 2010 China Postdoctoral Forum on Materials Science and Engineering (2010CPFMSE), Zhengzhou University [5] D. Chen, et al., Chem. J. Chinese U. 2008, 29, 1325. 说明:1、摘要中、英文均可，但格式必须统一; 2、摘要字体、页面等请严格遵照本;