摘要
报道了以六氯化钨为原料,以两亲性的无规共聚物聚苯乙烯-co-聚烯丙醇(PS-co-PAAL)和三嵌段共聚物聚氧乙烯-b-聚氧丙烯-b-聚氧乙烯(PEO-b-PPO-b-PEO)为模板,采用溶胶-凝胶法制备了WO3多孔薄膜.利用热重分析仪(TGA)、粉末X射线衍射仪(XRD)、扫描电子显微镜(SEM)、原子力显微镜(AFM)等表征手段,研究了模板和热处理温度对薄膜孔结构的影响;并通过H2敏测试以及利用紫外可见分光光度计(UV),研究了薄膜的氢敏性能和着色前后的透射光谱.结果表明,以无规共聚物PS-co-PAAL为模板制得的WO3薄膜,经400℃热处理后,可得到呈交联网状的多孔结构,并表现出最佳的氢致变色性能.
Porous tungsten oxide films were prepared using a sol-gel process with the tungstic chloride as the source material using amphiphilic copolymers, poly（styrene-co-allyl alcohol） （PS-co-PAAL） and poly（ethylene oxide）-block-poly（propylene oxide）-block-poly（ethylene oxide） （PEO-b-PPO-b-PEO）, as template respectively. The effect of polymer template and annealed temperature on the porous structure of the WO3 films was investigated by thermogravimetric analyzer （TGA）, X-ray powder diffractometer （XRD）, scanning electron microscope （SEM） and atomic force microscope （AFM）. The H2 gasochromic property and the change of visible transmittance before and after bleached were characterized by the test of H2 gas-sensing with combination of UV-visible spectrophotometer. The results indicated that the WO3 films prepared using PS-co-PAAL as template and annealed at 400℃ had crosslinked and porous structure, and showed the best H2 gasochromic property.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2009年第2期179-184,共6页
Acta Chimica Sinica
基金
中国科学院知识创新工程青年人才领域前沿项目(2007~2009)
教育部留学回国人员科研启动基金(2006)资助项目.
