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51.
Facile fabrication of g‐C3N4/MIL‐53(Al) composite with enhanced photocatalytic activities under visible‐light irradiation 下载免费PDF全文
A novel visible‐light‐driven g‐C3N4/MIL‐53(Al) composite photocatalyst was successfully prepared using a facile stirring method at room temperature. The g‐C3N4/MIL‐53(Al) composites were characterized and their effects on the photocatalytic activities for rhodamine B degradation were investigated. The g‐C3N4(20 wt%)/MIL‐53(Al) photocatalyst displayed optimal photocatalytic degradation efficiency, which was about five times higher than the photocatalytic activity of pure g‐C3N4. The improved photocatalytic performance of the g‐C3N4/MIL‐53(Al) photocatalyst was predominantly attributed to the efficient separation of electron–hole pairs and the low charge‐transfer resistance. g‐C3N4/MIL‐53(Al) also exhibited excellent stability and reusability. A proposed mechanism for the enhanced photocatalytic activity is also discussed based on the experimental results. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
52.
将人体白细胞抽滤成膜,与氧电极结合,制成细胞传感器,测定白细胞内过氧化物酶活性,该方法具有较高的特异性,简便,快速。40例正常人白细胞POD活性为(1.97±0.009)×10^4Pa/mL.min。 相似文献
53.
四氮唑乙酸与碳酸铅反应制备得到含能配位聚合物[Pb(tza)2]n (Htza=四氮唑-1H-1-乙酸), 用自然蒸发母液法获得单晶. 运用元素分析和红外光谱对结构进行了表征, X射线单晶衍射结果表明: 该晶体属于单斜晶系, C2/c空间群, a=1.5370(5) nm, b=1.0373(3) nm, c=0.8261(3) nm, β=119.415(4)°, V=1.1473(7) nm3, ρ=2.671 g/cm3, Z=2. 采用差示扫描量热分析(DSC)和热重-微分热重分析(TG-DTG)研究了该配合物的热分解过程及其非等温反应动力学, 并根据相关标准对配合物进行了感度测试. 结果表明: 该含能配合物具有较好的热稳定性和适当的感度, 分解反应放出大量的热和气体产物, 有望作为含能材料应用于相关领域. 相似文献
54.
以聚吡咯、聚噻吩和聚苯胺为代表的电活性导电聚合物(electroactive conducting polymers,ECP)已成为生物材料、组织工程及临床医学领域关注的焦点.目前研究主要集中在生物相容性、细胞及组织工程、蛋白质分离、DNA吸附修复、可控药物释放、生物传感器、神经探针等方面.ECP在神经细胞、脑细胞、心肌干细胞再生和功能调节,定向诱导组织器官的再生修复方面具有潜在的应用前景.本文主要综述了聚吡咯(PPy)和聚苯胺(PANi)在生物医学领域的研究进展,和电刺激对细胞生长和干细胞分化的影响,并建议了一些前景可观的相关研究方向. 相似文献