光谱学与光谱分析 |
|
|
|
|
|
Spectroscopic Study on CdS Nanoparticles Prepared by Microwave Irradiation |
CHENG Wei-qing1,2,LIU Di1,2,YAN Zheng-yu1,2* |
1. Department of Analytical Chemistry, China Pharmaceutical University, Nanjing 210009, China 2. Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, Nanjing 210009, China |
|
|
Abstract CdS nanoparticles capped by mercaptoacetic acid have been successfully synthesized by microwave method employing thioacetamide as sulfur source, which was proved to be a simple, rapid and specific mothod compared with traditional synthetical methods, such as precipitation, sol-gel, solvo-thermal method and so on. The concrete procedure synthesizing CdS nanoparticles was as follows: Cd(NO3)2 (40 mL, 5 mmol·L-1) was titrated with mercaptoacetic acid to pH 2.0, resulting in a turbid blue solution. NaOH (0.1 mol·L-1) was then added dropwise until the pH was 7 and the solution was again colorless. While quickly stirring the solution, 40 mL of 5 mmol·L-1 CH3CSNH2 was added. Subsequently, the solution was adjusted to pH 9.0 and placed in a microwave oven for 25 min with power 30%(it means that if microwave works in a 30 s regime, it works 6 s, and does not work 24 s. This is some kind of pulse regime, but the totalpower is still 100%). This kind of nanoparticles were water-soluble and symmetrical. The diameter of CdS nanoparticles which have a spherical morphology was determined to be 12 nm by transmission electron microscopy(TEM), which posess perfect uniforminty. According to literatures report, there are two kinds of emission peak: one is edge-emission peak, and the other is surface blemish emission. In contrast to edge-emission peak, the surface blemish emission shows red shift on fluorescence spectra. In the present paper, the prominent peak of CdS QDs fluorescence spectrum was located at 490 nm, the humpbacked peak caused by surface blemish of CdS nanoparticles was located at 565 nm. However, the surface blemish emission was unconspicuous, thus we can conclude that the synthetical CdS QDs possesses excellent luminescence capability and favorable structure. The size and absorption and fluorescence spectra of CdS nanoparticles at different microwave power, pH value, reaction time and different sulfur source were investigated. The result showed that the better nanoparticles could be obtained in the condition of 30% microwave power, pH 9.0 at the beginning of reaction, and the time of microwave reaction of 25 min. The synthesized nanoparticles were compared with the nanoparticles with CH3CSNH2, NH2CSNH2 and Na2S as sulfur source. The experiment indicated that CdS nanoparticles applying CH3CSNH2 as sulfur source showed strong edge-emission, and blemish emission was weak, so the fluorescence quality is excellent;but CdS nanoparticles applying NH2CSNH2 as sulfur source showed weak edge-emission;and CdS nanoparticles applying Na2S as sulfur source showed mainly fluorescence blemish emission. At the same time, the mercaptoacetic acid capped CdS nanoparticles were employed to study the quantitative analysis of Cu2+. According to the results of experiment, in a certain range of concentration(6.4-512 μg·L-1), Cu2+ quenched the fluorescence intensity of mercaptoacetic acid capped CdS nanoparticles with good linearity, which can be used in the determination of trace Cu2+ in samples. In conclusion, this kind of method supplied a new way to study synthesizing the CdS nanoparticles.
|
Received: 2007-03-16
Accepted: 2007-06-26
|
|
Corresponding Authors:
YAN Zheng-yu
E-mail: yanzhengyujiang@hotmail.com
|
|
[1] kumar A, Mital S. Journal of Colloid and Interface Sci., 2003, 265: 432. [2] Khanna P K, Gokhale R, Subbarao V V V S. Materials Letters, 2003, 57: 2489. [3] DAI Mei-ling, YAN Zheng-yu, PANG Dai-wen, et al(戴美玲, 严拯宇, 庞代文, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2006, 26(8): 1053. [4] Chen Yongfen, Rosenzweig Zeev. Analytical Chemistry, 2002, 74(19): 5132. [5] XU Rong-hui, WANG Yong-xian, XU Wan-bang(许荣辉,汪勇先,徐万帮). Journal of Synthetic Crystals(人工晶体学报),2006,35(10):1007. [6] Liao Q G, Li Y F, Huang C Z. Chemical Research in Chinese Universities, 2007, 23(2): 138. [7] Roy R. Solid State Chem., 1994, 111: 11. [8] Yang Huaming, Huang Chenghuan, Li Xianwei, et al. Materials Chemistry and Physics, 2005, 90: 155. [9] He Jie, Zhao Xiao-Ning, Zhu Jun-Jie, et al. Journal of Crystal Growth, 2002, 240: 389. [10] Zhu Junjie, Zhou Miaogao, Xu Jinzhong, et al. Materials Letters, 2001, 47: 25. [11] He Rong, Qian Xue-feng, Yin Jie, et al. Colloids and Surfaces A: Physicochem. Eng., 2003, 220: 151. [12] Chen H M, Huang X F, Xu L, et al. Superlattices and Microstructures, 1999, 27(1). [13] LIU Hui, LI Wen-you, YIN Hong-zong, et al(刘 辉, 李文友, 尹洪宗, 等). Acta Chimica Sinica(化学学报), 2005, 63(4): 301. [14] WU Xiao-chun, TANG Guo-qing, ZHANG Gui-lan, et al(吴晓春, 汤国庆, 张桂兰, 等). Chinase Science Bulletin(科学通报), 1996, 41: 95. [15] ZHANG Yu, FU De-gang, CAI Jian-dong, et al(张 宇, 付德刚, 蔡建东, 等). Acta Physico-Chimica Sinica(物理化学学报), 2000, 16: 431. [16] Bawndi M G, Steigerwald M L, Brus L E. Annual Rev. Phys. Chem., 1990, 41: 477. [17] Brus L E. J. Phys. Chem., 1986, 90: 2555. [18] Brus L E. Appl. Phys. A, 1991, 53: 465. [19] Henglein A. Chem. Rev., 1989, 89: 1861. |
[1] |
LEI Hong-jun1, YANG Guang1, PAN Hong-wei1*, WANG Yi-fei1, YI Jun2, WANG Ke-ke2, WANG Guo-hao2, TONG Wen-bin1, SHI Li-li1. Influence of Hydrochemical Ions on Three-Dimensional Fluorescence
Spectrum of Dissolved Organic Matter in the Water Environment
and the Proposed Classification Pretreatment Method[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 44(01): 134-140. |
[2] |
GU Yi-lu1, 2,PEI Jing-cheng1, 2*,ZHANG Yu-hui1, 2,YIN Xi-yan1, 2,YU Min-da1, 2, LAI Xiao-jing1, 2. Gemological and Spectral Characterization of Yellowish Green Apatite From Mexico[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 44(01): 181-187. |
[3] |
HAN Xue1, 2, LIU Hai1, 2, LIU Jia-wei3, WU Ming-kai1, 2*. Rapid Identification of Inorganic Elements in Understory Soils in
Different Regions of Guizhou Province by X-Ray
Fluorescence Spectrometry[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 44(01): 225-229. |
[4] |
WANG Hong-jian1, YU Hai-ye1, GAO Shan-yun1, LI Jin-quan1, LIU Guo-hong1, YU Yue1, LI Xiao-kai1, ZHANG Lei1, ZHANG Xin1, LU Ri-feng2, SUI Yuan-yuan1*. A Model for Predicting Early Spot Disease of Maize Based on Fluorescence Spectral Analysis[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(12): 3710-3718. |
[5] |
CHENG Hui-zhu1, 2, YANG Wan-qi1, 2, LI Fu-sheng1, 2*, MA Qian1, 2, ZHAO Yan-chun1, 2. Genetic Algorithm Optimized BP Neural Network for Quantitative
Analysis of Soil Heavy Metals in XRF[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(12): 3742-3746. |
[6] |
SONG Yi-ming1, 2, SHEN Jian1, 2, LIU Chuan-yang1, 2, XIONG Qiu-ran1, 2, CHENG Cheng1, 2, CHAI Yi-di2, WANG Shi-feng2,WU Jing1, 2*. Fluorescence Quantum Yield and Fluorescence Lifetime of Indole, 3-Methylindole and L-Tryptophan[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(12): 3758-3762. |
[7] |
YANG Ke-li1, 2, PENG Jiao-yu1, 2, DONG Ya-ping1, 2*, LIU Xin1, 2, LI Wu1, 3, LIU Hai-ning1, 3. Spectroscopic Characterization of Dissolved Organic Matter Isolated From Solar Pond[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(12): 3775-3780. |
[8] |
LI Xiao-li1, WANG Yi-min2*, DENG Sai-wen2, WANG Yi-ya2, LI Song2, BAI Jin-feng1. Application of X-Ray Fluorescence Spectrometry in Geological and
Mineral Analysis for 60 Years[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(10): 2989-2998. |
[9] |
XUE Fang-jia, YU Jie*, YIN Hang, XIA Qi-yu, SHI Jie-gen, HOU Di-bo, HUANG Ping-jie, ZHANG Guang-xin. A Time Series Double Threshold Method for Pollution Events Detection in Drinking Water Using Three-Dimensional Fluorescence Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(10): 3081-3088. |
[10] |
MA Qian1, 2, YANG Wan-qi1, 2, LI Fu-sheng1, 2*, CHENG Hui-zhu1, 2, ZHAO Yan-chun1, 2. Research on Classification of Heavy Metal Pb in Honeysuckle Based on XRF and Transfer Learning[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(09): 2729-2733. |
[11] |
JIA Yu-ge1, YANG Ming-xing1, 2*, YOU Bo-ya1, YU Ke-ye1. Gemological and Spectroscopic Identification Characteristics of Frozen Jelly-Filled Turquoise and Its Raw Material[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(09): 2974-2982. |
[12] |
YANG Xin1, 2, XIA Min1, 2, YE Yin1, 2*, WANG Jing1, 2. Spatiotemporal Distribution Characteristics of Dissolved Organic Matter Spectrum in the Agricultural Watershed of Dianbu River[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(09): 2983-2988. |
[13] |
CHEN Wen-jing, XU Nuo, JIAO Zhao-hang, YOU Jia-hua, WANG He, QI Dong-li, FENG Yu*. Study on the Diagnosis of Breast Cancer by Fluorescence Spectrometry Based on Machine Learning[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(08): 2407-2412. |
[14] |
ZHU Yan-ping1, CUI Chuan-jin1*, CHENG Peng-fei1, 2, PAN Jin-yan1, SU Hao1, 2, ZHANG Yi1. Measurement of Oil Pollutants by Three-Dimensional Fluorescence
Spectroscopy Combined With BP Neural Network and SWATLD[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(08): 2467-2475. |
[15] |
LIU Xian-yu1, YANG Jiu-chang1, 2, TU Cai1, XU Ya-fen1, XU Chang3, CHEN Quan-li2*. Study on Spectral Characteristics of Scheelite From Xuebaoding, Pingwu County, Sichuan Province, China[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(08): 2550-2556. |
|
|
|
|