纳米TiO_(2)/SiC复合材料的光致发光性能  

Photoluminescence properties of nano TiO_(2)/SiC composite materials

作　　者：文程程 王冬华 杨乐 WEN Chengcheng;WANG Donghua;YANG Le(College of Chemistry and Materials Science,Weinan Normal University,Weinan 714099,China)

机构地区：[1]渭南师范学院化学与材料学院,陕西渭南714099

出　　处：《化工科技》2023年第5期35-40,共6页Science & Technology in Chemical Industry

基　　金：国家级大学生创新创业训练计划项目(202110723010);陕西省自然科学基础研究计划项目(2021JQ-822);渭南市科技局重点研发计划项目(ZDYF-JCYJ-212);渭南师范学院自然科学类研究项目(18YKF01)。

摘　　要：纳米SiC溶解于无水乙醇中,加入不同V(钛酸丁酯),通过溶胶-凝胶法得到不同w(TiO_(2))的纳米TiO_(2)/SiC复合材料。通过X射线粉末衍射仪(XRD)、场发射扫描电子显微镜(FESEM)、X射线能谱仪(EDS)和荧光分光光度计(PL)对样品的纯度、微观形貌、元素成分和光致发光性能进行表征。结果表明,采用溶胶-凝胶法可以制备TiO_(2)/SiC复合材料,w(TiO_(2))对复合材料的光致发光特性产生重要影响。w(TiO_(2))=10%,发射峰强度大,主要与SiC和TiO_(2)表面缺陷的量子限制效应有关。随着w(TiO_(2))增加,发射峰强度下降,主要与TiO_(2)纳米颗粒表面的氧空位和缺陷的量较少有关。Nano-TiO_(2)/SiC composites with different TiO_(2)content were obtained by sol-gel method with adding butyl titanate and nano-SiC in anhydrous ethanol.The purity,crystallization state,microscopic morphology,elemental composition and photoluminescence properties of the samples were characterized by XRD,field emission scanning electron microscope,X-ray photoelectron spectroscopy and fluorescence spectrophotometer.The results show that TiO_(2)/SiC composites can be prepared by the sol-gel method,and the content of nano TiO_(2)has an important influence on the photoluminescence properties of the TiO_(2)/SiC composites.When the content of TiO_(2)is 10%,the emission peak intensity is high,mainly related to the quantum confinement effect of SiC and TiO_(2)surface defects.As the content of TiO_(2)increases,the emission peak intensity decreases,mainly due to the relatively small amount of oxygen vacancies and defects on the surface of TiO_(2)nanoparticles.

关 键 词：TiO_(2)/SiC复合材料 光致发光 TiO_(2) SIC 

分 类 号：O612.8[理学—无机化学]