摘要
采用液相高速剪切的方法制备了石墨烯悬浊液,并对制备的石墨烯进行了扫描电镜(SEM)、拉曼光谱和紫外吸收表征分析。结果表明,通过该方法可以制备水分散良好的石墨烯溶液。进一步,通过纳米材料光热转换制备纳米银/石墨烯溶液,对不同激光功率作用下制备的纳米银/石墨烯溶液的光热转换特性进行了研究,低浓度样品溶液,在波长为808 nm,功率为300 mW,作用15 min后,温度可达到28.2℃。理论上,采用时域有限元差分方法,模拟了不同粒径纳米银的表面等离子体共振效应对石墨烯光热转换性能的增强作用,模拟结果与实验现象相符合。另外,对溶液的光热转换稳定性和热平衡时间常数进行了比较,发现溶液具有很好的光热转换稳定性。
In this experiment,graphene suspensions are prepared by high speed shearing method,and the prepared graphene is characterized by scanning electron microscopy(SEM),Raman spectroscopy and UV absorption characterization.The results show that graphene solution with good water dispersion can be prepared by this method.Further,nano-silver and graphene solution is prepared by photothermal conversion of nanomaterials.The photothermal conversion characteristics of the nano-silver and graphene solution prepared under the action of different laser powers are investigated.The temperature of low concentration sample solution can reach 28.2℃under the action of laser with wavelength of 808 nm and power of 300 mW for 15 minutes.In theory,the enhancement effect of surface plasmon resonance of nano-silver with different particle sizes on the photothermal conversion performance of graphene is simulated by using finite difference time-domain method.The simulation results are in good agreement with experimental results.In addition,photothermal conversion stability and thermal equilibrium time constant of solutions are compared and analyzed,which proves that the nano-silver and graphene solution has good stability of photothermal conversion.
作者
刘艳玲
林雨萱
龙大恺
贾国治
赵泽家
LIU Yanling;LIN Yuxuan;LONG Dakai;JIA Guozhi;ZHAO Zejia(School of Science,Tianjin Chengjian University,Tianjin,China;School of Physical,Nankai University,Tianjin,China)
出处
《光电技术应用》
2022年第6期67-72,共6页
Electro-Optic Technology Application
基金
天津市科技计划项目(20YDTPJC01560)
天津市自然科学基金(19JCYBJC23900)资助。
关键词
石墨烯
纳米银
高速剪切
光热转换稳定性
graphene
nano-silver
high speed shearing
photothermal conversion stability
