| 聚乙烯醇- 硫脲体系中Q态CdS纳米粒子形成条件的探讨 |
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| 引用本文： | 王丽,章伟光,范军,刘宁,闫云辉,殷霞.聚乙烯醇- 硫脲体系中Q态CdS纳米粒子形成条件的探讨[J].华南师范大学学报(自然科学版),2006,0(3):70-73. |
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| 作者姓名： | 王丽 章伟光 范军 刘宁 闫云辉 殷霞 |
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| 作者单位： | 华南师范大学化学与环境学院,广东广州,510631 |
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| 基金项目： | 广东省自然科学基金资助项目(990463) |
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| 摘 要： | 聚乙烯醇体系中以硫脲为表面修饰剂合成了Q态CdS纳米粒子(Q-CdS).借助紫外-可见吸收光谱系统研究了硫脲加入量、pH值及Na2S加入量对Q-CdS形成的影响.结果表明,随着硫脲加入量的增大,Q-CdS粒径减小,粒径分布变窄;减小pH值从14到4对纳米粒子基本无影响,但至pH=2时,Q-CdS的特征吸收峰明显红移,表明形成的CdS颗粒粒径增大;减小Na2S加入量可得到粒径小且粒径分布窄的Q-CdS纳米粒子.
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| 关 键 词： | Q-CdS 硫脲 紫外-可见吸收光谱 |
| 文章编号： | 1000-5463（2006）03-0070-04 |
| 收稿时间： | 2006-05-19 |
| 修稿时间： | 2006年5月19日 |
STUDY ON FORMATION CONDITION OF Q-CdS NANOPARTICLES IN SYSTEM OF POLY(VINYL ALCOHOL)-THIOUREA |
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| WANG Li,ZHANG Wei-guang,FAN Jun,LIU Ning,YAN Yun-hui,YIN Xia.STUDY ON FORMATION CONDITION OF Q-CdS NANOPARTICLES IN SYSTEM OF POLY(VINYL ALCOHOL)-THIOUREA[J].Journal of South China Normal University(Natural Science Edition),2006,0(3):70-73. |
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| Authors: | WANG Li ZHANG Wei-guang FAN Jun LIU Ning YAN Yun-hui YIN Xia |
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| Institution: | School of Chemistry and Environment, South China Normal University, Guangzhou 510631 ,China |
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| Abstract: | Q-CdS nanoparticles were synthesized by using thiourea as modifying agent in poly(vinyl alcohol)(PVA) matrix.The impact of formation condition on Q-CdS was studied by UV-Vis spectrum.The results revealed that more CS(NH_2)_2 led to smaller size and narrower size distribution.Decreasing pH from 14 to 4,the absorption of Q-CdS has no change,but when pH was decreased to 2,there was a red shift,which indicated the size of Q-CdS was bigger.Furthermore,when the dosage of Na_2S was reduced,size of Q-CdS became smaller and size distribution became narrower. |
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| Keywords: | Q-CdS thiourea UV-Vis absorption spectrum |
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