In this study, a facile alcoholysis method was developed to synthesize BiOCIxBr1_x nanoplates at room temperature and atmospheric pressure. In this route, strong acid or alkaline environment was absolutely avoided to ...In this study, a facile alcoholysis method was developed to synthesize BiOCIxBr1_x nanoplates at room temperature and atmospheric pressure. In this route, strong acid or alkaline environment was absolutely avoided to realize the high exposure of {001} crystal facets. The regular changes in XRD peaks and cell parameters as a function of the Br content strongly declared that the obtained BiOCIxBrl_x products belonged to a group of solid solutions. The 2D nanosheets with in-plane wrinkles were clearly observed in TEM images. Interestingly, as the Br content increased, band gaps of BiOCIxBr1-x solid solutions gradually decreased. The photocatalytic degradation of RhB under simulated sunlight irradiation indicated that BiOCI0.sBr0.5 had the best photocatalytic activity. From the viewpoint of crystal chemistry, the photocatalytic activity of BiOCIxBr1-x solid solutions was closely related with the exposure amount of {001} facets, interlayer spacing of （001） plane and energy-level position of valence band.展开更多
推进航空机场的辅助动力装置(auxiliary power unit,APU)替代是绿色机场建设的一个重要环节,针对远机位点APU替代受配电增容改造及安全限制的影响,提出采用配置光储系统作为APU替代的方案。首先构建基于飞机航班动态变化下的远机位APU...推进航空机场的辅助动力装置(auxiliary power unit,APU)替代是绿色机场建设的一个重要环节,针对远机位点APU替代受配电增容改造及安全限制的影响,提出采用配置光储系统作为APU替代的方案。首先构建基于飞机航班动态变化下的远机位APU替代的负荷特性模型,然后提出满足动态负荷特性模型下的光储最优容量配置的双层模型,其中外层模型考虑光储系统建设成本最优的目标,内层模型计及储能充放电约束的运行优化,最后基于内层模型的Karush-Kuhn-Tucker(KKT)条件将内层模型转化为外层模型的附加约束,将双层模型转化为单层混合整数线性规划问题求解。通过某民航机场的夏季和冬季航班数据验证所提方案的正确性,表明配置光储系统替代远机位点APU的合理性。展开更多
Non-monotonic, asymmetrical electric field dependence of photoluminescence （PL） intensity is observed in a mono- layer sample of tris-（8-hydroxyquinoline） aluminum （A1Q） doped N,N＇-bis（3-methylphenyl）-N,N＇-...Non-monotonic, asymmetrical electric field dependence of photoluminescence （PL） intensity is observed in a mono- layer sample of tris-（8-hydroxyquinoline） aluminum （A1Q） doped N,N＇-bis（3-methylphenyl）-N,N＇-bis（phenyl）-benzidine （TPD）. A possible model is proposed： the charge separation from the dissociated photoexcited excitons causes energy band bending in the organic films and improves the hole injection from the electrode, which brings about the extra fluorescence. This mechanism is further verified by a series of experiments using a series of samples, variously featuring symmetrical electrodes, block layers, and hosts with lower hole mobilities.展开更多
文摘In this study, a facile alcoholysis method was developed to synthesize BiOCIxBr1_x nanoplates at room temperature and atmospheric pressure. In this route, strong acid or alkaline environment was absolutely avoided to realize the high exposure of {001} crystal facets. The regular changes in XRD peaks and cell parameters as a function of the Br content strongly declared that the obtained BiOCIxBrl_x products belonged to a group of solid solutions. The 2D nanosheets with in-plane wrinkles were clearly observed in TEM images. Interestingly, as the Br content increased, band gaps of BiOCIxBr1-x solid solutions gradually decreased. The photocatalytic degradation of RhB under simulated sunlight irradiation indicated that BiOCI0.sBr0.5 had the best photocatalytic activity. From the viewpoint of crystal chemistry, the photocatalytic activity of BiOCIxBr1-x solid solutions was closely related with the exposure amount of {001} facets, interlayer spacing of （001） plane and energy-level position of valence band.
文摘推进航空机场的辅助动力装置(auxiliary power unit,APU)替代是绿色机场建设的一个重要环节,针对远机位点APU替代受配电增容改造及安全限制的影响,提出采用配置光储系统作为APU替代的方案。首先构建基于飞机航班动态变化下的远机位APU替代的负荷特性模型,然后提出满足动态负荷特性模型下的光储最优容量配置的双层模型,其中外层模型考虑光储系统建设成本最优的目标,内层模型计及储能充放电约束的运行优化,最后基于内层模型的Karush-Kuhn-Tucker(KKT)条件将内层模型转化为外层模型的附加约束,将双层模型转化为单层混合整数线性规划问题求解。通过某民航机场的夏季和冬季航班数据验证所提方案的正确性,表明配置光储系统替代远机位点APU的合理性。
基金Project supported by the National Natural Science Foundation of China(Grant No.11134002)the National Science and Technology Major Project of the Ministry of Science and Technology of China(Grant No.2012CB921401)
文摘Non-monotonic, asymmetrical electric field dependence of photoluminescence （PL） intensity is observed in a mono- layer sample of tris-（8-hydroxyquinoline） aluminum （A1Q） doped N,N＇-bis（3-methylphenyl）-N,N＇-bis（phenyl）-benzidine （TPD）. A possible model is proposed： the charge separation from the dissociated photoexcited excitons causes energy band bending in the organic films and improves the hole injection from the electrode, which brings about the extra fluorescence. This mechanism is further verified by a series of experiments using a series of samples, variously featuring symmetrical electrodes, block layers, and hosts with lower hole mobilities.
