Zhang Lan
,
Gao Qin
,
Han Yong
材料科学技术（英文）
doi:10.1016/j.jmst.2016.01.008
Micro-porous TiO2 coatings co-doped with Zn2+ and Ag nanoparticles were fabricated on Ti by micro-arc oxidation (MAO) for 0.5, 1.5, 2 and 4?min, respectively. The evolutions of morphology and phase component of the coating as a function of processing time were investigated. The microstructure of the 2?min treated coating was further observed by transmission electron microscopy to explore the coating formation mechanism. The amounts of Ag and Zn released from the 2?min treated coating were measured and the antibacterial properties of the coatings against Staphylococcus aureus (S.?aureus) were also investigated. The obtained results showed that with prolonged MAO time, the contents of Ag and Zn on the coating surfaces increased. All the coatings were micro-porous with pore diameters of 1-4?μm; however, some pores were blocked by deposits on the 4?min treated coating. The 2?min treated coating was composed of amorphous TiO2, anatase, rutile, ZnO, Zn2TiO4 and homogenously distributed Ag nanoparticles. After immersion, Zn2+, Ag+, Ti2+ and Ca2+ were released from the coating and with the immersion time prolonged, the accumulated concentrations of these ions increased. After immersion for 36 weeks, the accumulated Zn2+ and Ag+ concentrations were 6.88 and 0.684?ppm, respectively, which are higher than the minimal inhibitory concentration but much lower than the cytotoxic concentration. Compared with polished Ti control, the coatings co-doped with Zn2+ and Ag nanoparticles significantly inhibited the adhesions of S.?aureus and reduced the amounts of planktonic bacteria in culture medium, indicating that the Zn and Ag co-doped TiO2 could be a bio-adaptable coating for long-lasting anti-microbial performance.
关键词:
Zn
,
Ag nanoparticle
,
Co-doped TiO2
,
Micro-arc oxidation
,
Bio-adaptable
汪伟伟
,
王文芳
,
陈小丽
,
吴玉程
,
董玲抒
稀有金属材料与工程
采用氧化还原法制备不同银含量的银/石墨烯纳米复合材料(银质量分数分别为0％,30％,46％,56％,63％).并通过X射线衍射(XRD)、光电子能谱仪(XPS)、高倍透射电子显微镜(HRTEM)和拉曼光谱(Raman)分析银含量对银/石墨烯纳米复合材料形态和显微结构的影响.结果表明,氧化石墨和银离子...
关键词:
石墨烯
,
银纳米颗粒,
,
石墨烯/银纳米复合材料
,
结构表征
王德松
,
张艳艳
,
安静
,
罗青枝
,
李雪艳
复合材料学报
采用原位法和液相化学还原法制备了Ag/低分子量壳聚糖(LMWC)和Ag/LMWC-聚吡咯(PPy)复合胶乳,分析了各种工艺条件对复合胶乳中纳米Ag粒子粒径及粒度分布的影响规律,并确定了复合胶乳较适宜的合成条件.采用UV-Vis、TEM、FTIR及XRD对复合胶乳的组成和纳米Ag的形态进行了表征.结果...
关键词:
纳米Ag粒子
,
低分子量壳聚糖
,
复合胶乳
,
结构表征
,
抑菌活性
赵卉卉
,
康卫民
,
马晓敏
,
邓南平
,
厉宗洁
,
程博闻
催化学报
doi:10.1016/S1872-2067(16)62545-7
随着工业的进步,废水处理特别是印染废水的处理成为亟待解决的问题.银纳米粒子因其特殊的物理化学性能而表现出催化活性,但银纳米粒子的团聚限制了其使用,所以出现了一系列新的载体材料,如微球、薄膜和纤维等.其中电纺纳米纤维由于具有高比表面积,作为载体材料具有非常大的优势,而将常规电纺纳米纤维作为载体也已有报...
关键词:
静电纺
,
多尺度结构
,
银纳米粒子
,
PA6纳米纤维膜
,
催化
闻明
,
李旸
,
李艳琼
,
张俊敏
,
管伟明
贵金属
doi:10.3969/j.issn.1004-0676.2010.01.002
首先采用化学氧化在块体Ti表面制备出多孔纳米TiO_2,随后通过高能离子束轰击实现Ag纳米粒子在TiO_2表面的有效固定, 最终在Ti表面制备出Ag/TiO_2纳米复合材料.采用XRD、SEM及TEM手段对其进行了结构表征.结果表明,化学氧化法可制备出多孔纳米TiO_2,其晶粒尺寸为10 nm左右;...
关键词:
复合材料
,
Ag纳米粒子
,
多孔TiO_2
熊万斌
,
刘燕
,
倪忠斌
,
陈明清
功能材料
以聚乙烯吡咯烷酮（PVP）为分散剂,2,2-二甲氧基-2-苯基苯乙酮（BDK）为引发剂,在乙醇和水（V（乙醇）/V（水）=7/3）的混合介质中,由紫外（UV）光引发苯乙烯（St）和甲基丙烯酸甲酯（MMA）进行分散共聚,研究了影响P（St-co-MMA）收率及其微球粒径的因素;在微球分散液中加入一定浓...
关键词:
紫外光
,
分散共聚
,
P(St-co-MMA)微球
,
银纳米颗粒
