摘要：Photocatalysis activated by visible light remains highly ***,we report novel MoSe2/ZnO/ZnSe(ZM)hybrids fabricated via a simple hydrothermal method for photocatalytic reduction of Cr(VI)under visible light *** hybrids show improved photocatalytic reduction ability under visible light irradiation compared to pure ZnO owing to good visible light absorption and rapid electron transfer and *** ZM hybrid shows the highest Cr(VI)reduction rate of 100%.Moreover,the photocatalytic Cr(VI)reduction process is mainly controlled by photoinduced electrons.

摘要：Development of efficient heterostructured photocatalysts that respond to visible light remains a considerable *** herein show the synthesis of ZnIn2S4/carbon quantum dot hybrid photocatalysts with flowerlike microspheres via a facile solvothermal *** ZnIn2S4/carbon quantum dot flowerlike microspheres display enhanced photocatalytic and photoelectrochemical activity compared with that of pure *** a content of only 0.5 wt%carbon quantum dots,93%of Cr(VI)is reduced under visible‐light irradiation at 40 *** a co‐catalyst,the carbon quantum dots improve the light absorption and lengthen the lifetime of charge carriers,consequently enhancing the photocatalytic and photoelectrochemical activity.

摘要：目的设计微流控芯片分离全血中胎儿有核红细胞(fetal nucleated red blood cell,fNRBCs),实现有核红细胞的快速便捷获取。方法利用有核细胞在血流作用下的边集效应以及细胞抗原抗体特异性黏附特点,设计微管流控芯片,分离全血中的fNRBCs。以脐血全血为例,通过免疫荧光计数,分析不同剪切率对fNRBCs富集效果的影响。结果相较于简单静置黏附,增加剪切率可以增加直微管黏附有核红细胞的数量,细胞的富集效果随血流剪切率的增大先增大后减小。结论利用直微管能够实现fNRBCs的全血快速有效捕获。研究结果为无创产前诊断的发展以及胎儿细胞转移机制的探究提供实验参考。

摘要：文章旨在研究镀铜石墨对铜基金属结合剂砂轮性能的影响,将镀铜石墨和普通石墨按照研究方案设计的比例均匀混合,采用热压烧结的方法制成胎体试条,且在混合粉末中添加超硬磨料制成金属结合剂超硬材料砂轮,利用硬度计、电子万能试验机、扫描电镜、划片机等设备,分别测试和研究了金属结合剂胎体硬度、抗折强度、断口形貌以及金属结合剂超硬材料砂轮切割性能。通过对以上结果的分析,揭示了镀铜石墨含量的不同对金属结合剂胎体及超硬材料砂轮性能的影响规律。试验数据表明镀铜石墨的添加有利于提高金属结合剂胎体的硬度和抗折强度,最高可分别提升8.4%和25.5%;另一方面增加了超硬材料砂轮的耐磨性,相同试验条件下磨耗降低了60%。