n TEOS n C 2 H 5 OH n HNO 3 = h 2 CdS 40 4 d CdS 2 CdS b ~ d CdS h Cd SC NH 2 2 n NO 3 2 CdS CdS CdS 12 CdS 2. 3 CdS 25

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1 CHINESE JOURNAL OF LUMINESCENCE Vol. 32 No. 3 Mar CdS TEOS - CdS XRD - CdS 5. 1 nm CdS CdS 0. 5% CdS - O PACS m PACC 7855 A DOI /fgxb CdS 1-2 CdS CdS Ⅱ-Ⅳ ev CdS 2 CdS 3 CdS 2. 1 TEOS CdS Cd NO 3 2 4H 2 O CS NH 2 2 CdS 2. 2 CdS CdS 4 - Solge1 CdS 10 TEOS 5-7 Cd NO 3 2 4H 2 O SC NH 2 2 TEOS H 2 O C 2 H 5 OH HNO 3 30 min n H 2 O n TEOS 8-9 n C 2 H 5 OH n HNO 3 = Cd NO 3 2 SC NH 2 2 n H 2 O ON xuleihua@ cumt. edu. cn Tel

2 n TEOS n C 2 H 5 OH n HNO 3 = h 2 CdS 40 4 d CdS 2 CdS b ~ d CdS h Cd SC NH 2 2 n NO 3 2 CdS CdS CdS 12 CdS 2. 3 CdS 2550 /maxvb /PC X Cu Kα λ = nm CdS XRD RF-5301PC 450 W 6 nm 3 nm Unico UV- 3102PCS 3 1 CdS XRD 1 a 2 b 3 2θ = CdS Scherrer CdS Fig nm CdS Absorption spectra of CdS-doped silica xerogels with different mole fraction a pure xerogel b 0. 1% CdS-doped c 0. 5% CdS-doped d 1. 0% CdS- CdS doped. Cd SC NH 2 2 n X 2 X = NO CdS 400 nm CdS CdS a b 0. 1% CdS- c 0. 5% CdS- d 1. 0% CdS- 1 Fig. 1 XRD a b CdS Fig. 3 XRD pattern of silica xerogels a the pure silica and b CdS-doped silica. 3 CdS a b 0. 1% CdS- c 0. 5% CdS- d 1. 0% CdS- PL spectra of silica xerogels with different CdS dopant mole fraction a pure xerogel b 0. 1% CdSdoped c 0. 5% CdS-doped d 1. 0% CdS-doped.

3 3 CdS 229 CdS CdS 3 CdS 460 nm CdS nm C 4 CdS - a b 0. 1% CdS- Si O SiO 3 Si sp 3 Si O R C O Fig. 4 - O 2p O Si O O C O different mole fraction a pure b 0. 1% CdSdoped c 0. 5% CdS-doped d 1. 0% - CdS-doped. c 0. 5 CdS% - d 1. 0% CdS- Excitation spectra of CdS-doped silica xerogels with 4 CdS Si C CdS 350 nm CdS 460 nm 650 nm nm 380 nm CdS nm CdS CdS 350 nm nm CdS 650 nm 460 nm 460 CdS 460 nm nm CdS CdS CdS 0.5% 4 - CdS 5 - CdS 5. 1 nm CdS CdS Si CdS CdS CdS 460 nm 460 nm

4 Jiang Daixun Cao Lixin Su Ge et al. Synthesis and photoluminescent properties of ZnS Mn /CdS nanoparticles with core /shell structure J. Chin. J. Lumin in Chinese. 2 Jayanthi K Chawla S Chander H et al. Structural optical and photoluminescence properties of ZnS Cu nanoparticle thin films as a function of dopant concentration and quantum confinement effect J. Cryst. Res. Technol Gan Xinhui Liao Yuanbao Liu Dong et al. Chemical bath deposition and optical properties of CdS nanocrystalline films with tunable electronic band gap J. Chin. J. Lumin in Chinese. 4 Correa-Duarte M A Giersog M Liz-Marzán L M. Stabilization of CdS semiconductor nanoparticles against photodegradation by silica coating procedure J. Chem. Phys. Lett Li Qiyuan Wei Changping Sun Xiaofei. Optical properties of ZnO / composite film J. Chin. J. Lumin in Chinese. 6 Cai Jinjun Wang Yi Pan Huanhuan et al. Preparation and photoluminescence of green Zn 2 SiO 4 Mn 2 + phosphor by solgel method J. Chin. J. Lumin in Chinese. 7 Bekiari V Lianos P. Characterization of photoluminescence from a material made by interaction of 3-aminopropyl triethoxysilane with acetic acid J. Langmuir Zhao Limin Shao Xing Kong Ying. The design and characterization of inorganic /organic hybrid luminescence molecule materials with terbium-sulfosalieylic acid complexes J. Chin. J. Lumin in Chinese. 9 Mu J Gu D Y Xu Z Z. Synthesis and stabilization of CdS nanoparticles embedded in silica nanospheres J. Appl. Phys. A Rao A P Pajonk G M Rao A V. Effect of ph aging and drying on the size of CdS nanocrystallites monolithicity and transparency of nanocrystalline CdS-doped silica xerogels J. J. Mater. Synth. Proceedings Wang C Y Mo X Zhou Y et al. A convenient ultraviolet irradiation technique for in situ synthesis of CdS nanocrystallites at room temperature J. J. Mater. Chem Sreekumari N P Revaprasadu N Radhakrishnana T et al. Preparation of CdS nanoparticles using the cadmium Ⅱ complex of N N'-bis thiocarbamoyl hydrazine as a simple single-source precursor J. J. Mater. Chem Yoldas B E. Thermochemically induced photoluminescence in sol-gel-derived oxide etworks J. J. Non-Cryst. Solids García J Mondragón M A Tellez C et al. Blue emission in tetraethoxysilane and silica gels J. Mater. Chem. Phys Green W H Le K P Grey J et al. White phosphors from a silica-carboxylate sol-gel precursor that lack metal activator ions J. Science Han Yinhua Lin Jun. Photoluminescence of xerogels J. Chin. J. Lumin in Chinese. 17 Murakoshi K Hosokawa H J Saitoh M et al. Preparation of size-controlled hexagonal CdS nanocrystallites and the characteristics of their surface structures J. J. Chem. Soc Mu J Gu D Gu X. Synthesis of water-soluble coprecipitate Cd x Zn 1 - x S nanoparticles J. J. Disp. Sci. Techn Yang P Song C F Liu M K. The luminescence of PbS nanoparticles embedded in sol-gel silica glass J. Chem. Phys. Lett

5 3 CdS 231 Photoluminescent Properties of CdS Quantum Dots Doped in Silica Xerogel XU Lei-hua QIANG Ying-huai JIANG Li School of Materials Science and Engineering China University of Mining and Technology Xuzhou China Abstract The CdS nanocryticles doped silica xerogels were prepared by using the sol-gel method where tetraethoxysilane TEOS was employed as the main precursor and cadmium nitrate thiourea as start materials. The X-ray diffraction pattern indicated that silica xerogels are noncrystalline structure and the mean diameter of the CdS particles is 5. 1 nm. The PL emission spectrum of the undoped silica xerogels showed weak emission peaked at 460 nm that could be attributed to the intrinsic defect states of silica xerogel. For 0. 5% CdS-doped samples the photoluminescence intensity reached maximum. The PL excitation spectra of undoped silica xerogel show that only one peak at 350 nm is observed. For CdS-doped samples a new peak at 380 nm is observed which could be attribute to the doping CdS quantum dots. Key words silica xerogels photoluminescence CdS nanoparticles sol-gel CLC number O PACS m PACC 7855 Document code A DOI /fgxb Received date 櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃櫃 fgxbt@ 126. com Tel http / /www. fgxb. org

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附件 2 高等学校教师职务任职资格申报表学校名称 : 西南科技大学教师姓名 : 宋丽贤从事学科 ( 专业 ): 材料科学与工程现任专业技术职务 : 讲师拟评审任职资格 : 副研究员填表时间 :2014 年 9 月 26 日四川省教育厅制填表及装订说