O644.1 2000021489多相光催化反应中太阳光与电光源效率比较=Comparativestudy of performance efficiency usinglamp and solar in photocatalytic degradationprocess[刊,中]/王怡中,符雁(中科院生态环境研究中心环境水化学国家重点...O644.1 2000021489多相光催化反应中太阳光与电光源效率比较=Comparativestudy of performance efficiency usinglamp and solar in photocatalytic degradationprocess[刊,中]/王怡中,符雁(中科院生态环境研究中心环境水化学国家重点实验室.北京(100085))//太阳能学报.-1998,19(1).-36-40报道了利用电光源和太阳光源三种光化学反应系统的特性以及在甲基橙溶液光催化脱色反应中的运行效果,并将实验结果进行综合评价比较。展开更多
合成了一种轴向核苷修饰硅酞菁,即二[5′-(2′,3′-O-异丙基)-5-甲基胞苷氧基]硅酞菁,并通过1 H NMR和HR-MS等手段进行了表征。该化合物在N,N-二甲基甲酰胺和含1%Cremophor EL水溶液中以单体形式存在,Q带最大吸收波长分别位于676和679nm...合成了一种轴向核苷修饰硅酞菁,即二[5′-(2′,3′-O-异丙基)-5-甲基胞苷氧基]硅酞菁,并通过1 H NMR和HR-MS等手段进行了表征。该化合物在N,N-二甲基甲酰胺和含1%Cremophor EL水溶液中以单体形式存在,Q带最大吸收波长分别位于676和679nm,荧光发射峰分别位于685和689nm。离体光动力抗癌活性表明,该化合物具有显著的光动力抗癌活性,对人肝癌细胞HepG2的半致死浓度(IC50)低至7.8×10-8 mol·L-1。荧光共聚焦显微镜研究显示,SiPcG可定位于细胞线粒体中。研究表明,SiPcG是一种有发展潜力的新型抗癌光敏剂。展开更多
Performances of semiconductor photocatalysts are integrally determined by efficiencies of basic processes such as light absorption,charge separation and surface catalysis,but conventional configurations of photocataly...Performances of semiconductor photocatalysts are integrally determined by efficiencies of basic processes such as light absorption,charge separation and surface catalysis,but conventional configurations of photocatalysts normally suffers from the competition of light absorption originating from cocatalyst deposition and limited interface charge separation between the photocatalyst and cocatalyst.Herein we give the first proof-of-concept illustration that a reversed configuration of photocatalysts with a core/shell structure of microsized Mo2N cocatalysts and nanosized CdS photocatalysts,which exhibits superior solar hydrogen production to the conventional configuration with nanosized Mo2N cocatalysts deposited on the surface of CdS photocatalysts.It is revealed that the reversed configuration outperforms the conventional one in all areas of light absorption,charge separation and surface catalysis.Strikingly,the special core/shell structure introduced here can well avoid the competition of light absorption by cocatalysts and make an effective confinement effect to promote the surface catalysis of Mo2N.Our finding provides an alternative strategy to improve performances of photocatalysts.展开更多
文摘O644.1 2000021489多相光催化反应中太阳光与电光源效率比较=Comparativestudy of performance efficiency usinglamp and solar in photocatalytic degradationprocess[刊,中]/王怡中,符雁(中科院生态环境研究中心环境水化学国家重点实验室.北京(100085))//太阳能学报.-1998,19(1).-36-40报道了利用电光源和太阳光源三种光化学反应系统的特性以及在甲基橙溶液光催化脱色反应中的运行效果,并将实验结果进行综合评价比较。
文摘合成了一种轴向核苷修饰硅酞菁,即二[5′-(2′,3′-O-异丙基)-5-甲基胞苷氧基]硅酞菁,并通过1 H NMR和HR-MS等手段进行了表征。该化合物在N,N-二甲基甲酰胺和含1%Cremophor EL水溶液中以单体形式存在,Q带最大吸收波长分别位于676和679nm,荧光发射峰分别位于685和689nm。离体光动力抗癌活性表明,该化合物具有显著的光动力抗癌活性,对人肝癌细胞HepG2的半致死浓度(IC50)低至7.8×10-8 mol·L-1。荧光共聚焦显微镜研究显示,SiPcG可定位于细胞线粒体中。研究表明,SiPcG是一种有发展潜力的新型抗癌光敏剂。
基金supported by the National Natural Science Foundation of China(21633009,21925206)the Dalian National Laboratory For Clean Energy(DNL)Cooperation Fund,Chinese Academy of Sciences(DNL 201913)+2 种基金International Partnership Program of Chinese Academy of Sciences(121421KYSB20190025)the DICP foundation of innovative research(DICP I201927)support from Liaoning Revitalization Talents Program(XLYC1807241)。
文摘Performances of semiconductor photocatalysts are integrally determined by efficiencies of basic processes such as light absorption,charge separation and surface catalysis,but conventional configurations of photocatalysts normally suffers from the competition of light absorption originating from cocatalyst deposition and limited interface charge separation between the photocatalyst and cocatalyst.Herein we give the first proof-of-concept illustration that a reversed configuration of photocatalysts with a core/shell structure of microsized Mo2N cocatalysts and nanosized CdS photocatalysts,which exhibits superior solar hydrogen production to the conventional configuration with nanosized Mo2N cocatalysts deposited on the surface of CdS photocatalysts.It is revealed that the reversed configuration outperforms the conventional one in all areas of light absorption,charge separation and surface catalysis.Strikingly,the special core/shell structure introduced here can well avoid the competition of light absorption by cocatalysts and make an effective confinement effect to promote the surface catalysis of Mo2N.Our finding provides an alternative strategy to improve performances of photocatalysts.
