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	1. Optimization on production technology of nano silica
	YIN Xiangbin,OU Encai,XU Weijian
	Chemistry 24 May 2017
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:In this paper, chemical precipitation was used to produce nano silica in the presence of polyvinylpyrrolidone (PVP) and cetyltrimethyl ammonium bromide (CTAB) as composite dispersant. The structure and property of samples were characterized by IR, XRD, SEM and BET. The results indicates that the product with small particle size ,large specific surface area and high oil adsorption value can be prepared under these conditions: concentration of acidic water glass: 7.5 Be′; temperature: 60-70 °C; pH value: 8; the amount of dispersant: 1.6% 5 Be′ water glass..
	TO cite this article:YIN Xiangbin,OU Encai,XU Weijian. Optimization on production technology of nano silica[OL].[24 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4735955


	2. The Structure Characteristics of Zinc Stannate Thin Films prepared by Sol-gel Method
	ZHANG Haijiao,JIAO Zheng
	Chemistry 10 January 2014
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	Abstract:Increasing attention has been paid to the production and investigation of the Zinc-Stannate films, which are found sensitive to NOx gases and humidity. Using sol-gel technical, Zn2SnO4 thin films were successfully deposited on alumina and silicon substrates. Treated under different temperatures and observed with SEM, it can be seen that according to increased temperatures, the structures of thin films changed from amorphy to hexagonal crystal. Furthermore, the gas sensitive characteristics of Zinc Stannate thin films were also investigated.
	TO cite this article:ZHANG Haijiao,JIAO Zheng. The Structure Characteristics of Zinc Stannate Thin Films prepared by Sol-gel Method[OL].[10 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4580764


	3. Preparation and luminescent properties of YAG: Sm3+-Bi3+ co-doped luminescent glass for the white light emitting diodes
	Miao jianwen,Qian Zhang,Guohua Song,Chao Lu,Buyuan Qi
	Chemistry 05 December 2013
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	Abstract:Y3Al5O12 (YAG - yttrium aluminum garnet): Sm3+-Bi3+ co-doped luminescent glasses for the white light emitting diodes (W-LEDs) were prepared. The precursor of Y3Al5O12: Sm3+-Bi3+ was synthesized by a chemical co-precipitation method (CPM). The luminescent glasses were obtained with the heat treatment of Ba2CO3 - Na2CO3 - H3PO4 -SiO2 -Al2O3 glass matrix and the precursor of Y3Al5O12: Sm3+-Bi3+ at 1400 C. The influence of the Sm3+ and Bi3+ contents and calcination temperature on the glass luminescent properties was analyzed. Scanning electron microscopy (SEM) results of the inner structure obtained YAG:Sm,Bi fluorescent glasses show that micro particles are distributed homogeneously in the glass matrix, presenting smooth surface and relatively uniform particle size. Luminescent glass can be efficiently excited by ultraviolet (UV) light (400 nm) and emit the strong red light of 602 nm due to the Sm3+ transition of 6H5/2→4D3/2, 6H5/2→6P7/2, 6H5/2→4F7/2, 6H5/2→4I9/2 in excited range and 4G5/2→6H5/2, 4G5/2→6H7/2, 4G5/2→6H9/2 in emission range. The optimum contents of Sm3+ and Bi3+ doped in the YAG: Sm3+-Bi3+ fluorescence glasses are 5% and 2 mol%, respectively, which shows much stronger luminescence intensity. Therefore, the fabricated luminescent glass would have a promising application in the area of white light-emitting diodes.
	TO cite this article:Miao jianwen,Qian Zhang,Guohua Song, et al. Preparation and luminescent properties of YAG: Sm3+-Bi3+ co-doped luminescent glass for the white light emitting diodes[OL].[ 5 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4570542


	4. Synthesis of ZnO Nanotower Controlled by Reagent's Vapor Pressure
	YAN Youguo,CHEN Haixiang,WANG Xiao,CAO Xuhui,ZHOU Lixia,ZHANG Jun
	Chemistry 04 December 2012
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	Abstract:In this paper, ZnO nanotower with layer-by-layer structure was well prepared using Zn as source at 700℃ via chemical vapor deposition method. In the growth process, the Zn vapor pressure was considered as crucial factor determining the growth behavior of reagent's species, and a competitive model between axial and lateral growth controlled by Zn vapor pressure was proposed to explain the formation of tower-shaped structure. Several other experiments were conducted to analyze the growth behavior under different Zn vapor pressure. Experimental results indicated that the decreasing Zn vapor pressure was responsible for the formation of layer-by-layer structure. High Zn vapor pressure would induce to formation of nanotower with large diameter and thin layer, and low Zn vapor pressure would result in formation of nanotower with small diameter and thick layer. These experimental results further confirmed the competitive growth model. Our growth analyses were helpful in understanding microcosmic growth behavior of reagent's species, which contributed to realize controlled growth of complex nanostructures in vapor route. Furthermore, these obtained nanotowers might have potential applications as functional blocks in future nanodevices.
	TO cite this article:YAN Youguo,CHEN Haixiang,WANG Xiao, et al. Synthesis of ZnO Nanotower Controlled by Reagent's Vapor Pressure[OL].[ 4 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4499267


	5. Morphology and Magnetic Properties of NiCuZn Ferrite synthesized by molten salt method
	jing FENG,GUO Liqin,HOU Xiangyu,XU Xiaodong,ZHANG Milin
	Chemistry 14 January 2009
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	Abstract:The morphology and magnetic properties of NiCuZn ferrite have been studied. The nano-sized particles were prepared by a molten salt method. The properties of the (Ni0.37-xCuxZn0.62)Fe2O4 (x=0.16~0.22) were investigated by X-ray diffraction(XRD), scanning electron microscope (SEM) and vibrating sample magnetometer (VSM) techniques. It was found that the additions of CuO could induce the increasing of particles size due to the structure tend to be normal Zn ferrite. The Curie temperature Tc increased with Cu2+ content in the range of x<10, and then decreasing rapidly. This can be ascribed to that the amount of Cu2+ ion in B site increasing， which resulted in the superexchange effect of A-B increasing in the range of X<10.
	TO cite this article:jing FENG,GUO Liqin,HOU Xiangyu, et al. Morphology and Magnetic Properties of NiCuZn Ferrite synthesized by molten salt method[OL].[14 January 2009] http://en.paper.edu.cn/en_releasepaper/content/27844

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