摘要：Designing and fabricating highly efficient photocatalysts for water splitting is a promising strategy to address energy and environmental *** sulfide(CdS)has received significant interest as a photocatalyst for visible‐light‐induced hydrogen(H2)***,the severe photocorrosion,high overpotential,rapid charge recombination,and sluggish surface reaction kinetics drastically hinder its practical application in water ***,uniform zinc cadmium sulfide(Zn_(0.5)Cd_(0.5)S)nanoparticles were anchored on ultrathin Ni(OH)_(2)nanosheets via a facile solution‐phase approach to form an intimate two‐dimensional(2D)/zero‐dimensional(0D)*** visible light irradiation,the 7%Ni(OH)_(2)/Zn_(0.5)Cd_(0.5)S composite exhibited the highest H2 production rate of 6.87 mmol·h^(–1)·g^(–1)with an apparent quantum yield of 16.8%at 420 nm,which is almost 43 times higher than that of pristine Zn_(0.5)Cd_(0.5)S and considerably higher than that of the Pt/Zn_(0.5)Cd_(0.5)S *** high photoactivity of the 2D/0D Ni(OH)_(2)/Zn_(0.5)Cd_(0.5)S heterojunction can be ascribed to its unique and robust structure,wherein the ultrathin Ni(OH)_(2)nanosheets not only provide an excellent platform for the incorporation of Zn_(0.5)Cd_(0.5)S nanoparticles but also serve as an effective cocatalyst to promote photoinduced electron transfer and offer more active sites for photocatalytic H_(2) *** work paves the way toward the development of versatile,low‐cost,and highly efficient 2D/0D heterojunction photocatalysts for solar energy conversion.

摘要：目的:通过对山藿香活性成分的提取和抑菌性能方面的评估,为开发山藿香提供研究依据。方法:(1)以料液比、75%乙醇溶液中氢氧化钙的浓度、超声温度、超声时间四个因素,作为自变量依据响应面(Box-Behnken)实验设计原理,筛选最佳提取方案;(2)采用常量肉汤稀释法考察活性成分抑菌效果。结果:(1)山藿香的最佳提取工艺条件为:山藿香与75%碱性乙醇溶液(内加氢氧化钙0.5g/L)按1︰8重量比,75℃超声提取1h;(2)山藿香三萜类对大肠杆菌、金黄色葡萄球菌的抑制效果较强。结论:广东地产药材山藿香,其中活性成分山藿香三萜类具有较强抑菌性能,其提取方法简单、提取率较高。