罗丹明B敏化TiO2可见光分解水产氢研究  

Improved efficiency of water splitting for hydrogen evolution on Rhodamine B sensitized P25 nanocomposites under visible light

作　　者：杨朋举[1,2] 王剑[1,2] 赵江红[1] 朱珍平[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001 [2]中国科学院大学北京100049

出　　处：《燃料化学学报》2013年第6期735-740,共6页Journal of Fuel Chemistry and Technology

基　　金：中国科学院山西煤炭化学研究所青年人才基金(2011SQNRC19)

摘　　要：通过低温煅烧处理罗丹明B和P25(TiO2)的混合物一步合成了罗丹明B敏化的TiO2复合光催化剂。X射线衍射(XRD)和场发射扫描电子显微镜(FESEM)表征结果显示,低温煅烧处理未改变P25的晶相结构和形貌。紫外-可见光吸收光谱和红外光谱表征表明,罗丹明B和P25之间发生了强的相互作用,荧光光谱表征结果证实低温煅烧处理导致的强相互作用有利于电子从罗丹明B向P25传输。可见光光催化分解水实验结果表明,250℃下煅烧处理得到的复合光催化剂具有最佳的产氢速率,可达到65.1μmol/(g.h),是相同光催化反应条件下罗丹明B和P25物理混合光催化剂的1.8倍。The RhB-P25 nanocomposites synthesized by low temperature calcination were used for visible light induced photocatalytic water splitting.It was confirmed by X-ray diffraction（XRD） and field emission scanning electron microscope（FESEM）characterization that the crystalline phase and morphology of P25 catalyst were not changed by calcination treatment.UV-visible absorption spectra and FT-IR spectra indicated that there was a strong mutual interaction between RhB and P25.PL spectra also proved that electrons could easily transfer from RhB to P25 after the low temperature calcination treatment.The highest rate of hydrogen evolution was observed for the sample calcined at 250℃,about 65.1μmol/（g·h） under visible light irradiation,which was 1.8 times larger than that of the physical mixture of P25 and RhB.

关 键 词：罗丹明B TIO2 低温煅烧 光解水 

分 类 号：TQ116.29[化学工程—无机化工]