聚二甲基硅氧烷基上转换材料的制备与光催化应用  

Preparation and Photocatalytic Application of Up-conversion Materials Based on PDMS

作　　者：吴振伟 陈佳 韩鹏举 陈硕然 宋飒飒 叶常青[1] 王筱梅[1] WU Zhen-wei;CHEN Jia;HAN Peng-ju;CHEN Shuo-ran;SONG Sa-sa;YE Chang-qing;WANG Xiao-mei(Research Center for Green Printing Nanophotonic Materials,Jiangsu Key Laboratory for Environmental Functional Materials,Suzhou University of Science and Technology,Suzhou 215009,Jiangsu,China)

机构地区：[1]苏州科技大学绿色印刷纳米光子工程技术研究中心化学生物与材料工程学院

出　　处：《精细化工》2019年第11期2171-2176,共6页Fine Chemicals

基　　金：国家自然科学基金（51603141,51673143,51873145）;江苏省自然科学基金（BK20160358,BK20170065）;江苏省高校自然科学基金重大项目（17KJA430016）;江苏省“六大人才高峰”（XCL-79）;江苏省第五期“333工程”资助（BRA2018340）;江苏省高校“青蓝工程”

摘　　要：将光敏剂四苯基卟啉钯(Pd TPP)和湮灭剂9,10-二苯基蒽(DPA)溶解于甲苯,在Tween 20的乳化作用下与去离子水配制成O/W上转换微乳液;进一步与二甲基硅氧烷共混,将O/W上转换微乳液体系负载于固化后的聚二甲基硅氧烷(PDMS)中,制得基于三线态-三线态湮灭(TTA)机制的PDMS固态上转换树脂材料。在半导体激光器(532nm,60m W/cm^2)激发下,固态上转换材料可发射强的绿转蓝上转换荧光,固态上转换效率最大可达22%。将该材料应用于光电流响应和光催化降解过程中:三电极体系在PDMS固态上转换树脂上转换荧光的照射下,获得了0.9μA的光电流,证明了光电流的产生源于上转换蓝光对ZnCdS薄膜的照射;Pt/WO3粉末存在和固态上转换蓝光照射的条件下,罗丹明B染料降解作用显著,最大光降解效率达到82.3%。An O/W upconversion microemulsion was prepared by dissolving photosensitizer palladium(Ⅱ) tetraphenylporphyrin(Pd TPP) and emitter 9,10-diphenylanthracene(DPA) in toluene in the presence of Tween 20. The O/W upconversion microemulsion system was further mixed with dimethylsiloxane and embedded into polydimethylsiloxane(PDMS) resin to fabricate solid-state triplet-triplet annihilation(TTA) upconversion materials. Under the simulation of a semiconductor laser(532 nm, 60 m W/cm2), the solid-state TTA upconversion materials showed strong blue emission with a maximum conversion efficiency of 22%. The material was then applied in the photocurrent response and photocatalytic degradation processes. It was found that three-electrode system obtained a photoelectric current of 0.9 μA under the irradiation of PDMS TTA film by upconversion blue light. Remarkable degradation phenomenon of rhodamine B was observed under the condition of Pt/WO3 powder and solid upconversion blue light irradiation, the maximum of the photo-catalysis efficiency can be 82.3%.

关 键 词：TTA固态上转换 光电流响应 光催化降解 聚二甲基硅氧烷 O/W型微乳液 功能材料 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]