通过溶胶-凝胶法合成了硅酸锆包裹氧化改性炭黑(Zr Si O4/C)色料,采用XRD、色度仪和TEM等分析手段对色料进行表征。研究了改性C的球磨方式、溶剂种类和成型压力等工艺因素对Zr Si O4合成及Zr Si O4/C色料色度的影响规律。结果表明:着色...通过溶胶-凝胶法合成了硅酸锆包裹氧化改性炭黑(Zr Si O4/C)色料,采用XRD、色度仪和TEM等分析手段对色料进行表征。研究了改性C的球磨方式、溶剂种类和成型压力等工艺因素对Zr Si O4合成及Zr Si O4/C色料色度的影响规律。结果表明:着色剂C粉的形貌对包裹色料的色度影响明显,手磨过筛后的C粉呈颗粒状,分布均匀,制得的色料黑度较高,而经过振动球磨后的C呈絮状,不宜进行包裹;水溶剂会导致异质聚合Si-O-Zr键断裂,形成同质聚合,不利于包裹体Zr Si O4的低温合成,从而影响色料的呈色;过高的成型压力阻碍了Zr Si O4合成过程中的Si F4气相传质,影响了Zr Si O4的正常生长,不利于炭黑包裹和色料的发色。展开更多
To characterize the magma that gave rise to explosive eruptions of Merapi volcano in October-November 2010, melt inclusions and juvenile components fiom the eruption deposits have been analyzed. Major-element composit...To characterize the magma that gave rise to explosive eruptions of Merapi volcano in October-November 2010, melt inclusions and juvenile components fiom the eruption deposits have been analyzed. Major-element compositions of whole-rocks were analyzed by X-ray fluorescence and trace elements, including the Rare Earth Elements by inductively coupled plasma mass spectrometry. Melt inclusions and the host minerals were analyzed using energy-dispersive X-ray spectroscopy and CO2 and H20 in melt inclusions, and their associated bubbles, were analyzed using laser Raman spectrometry. The compositions of the whole-rock eruption products are basaltic and esite that slightly sifting of SiO2 and K20 composition to previous eruption products, whereas the melt inclusions in pyroxene, plagioclase and hornblende are dacite to rhyolite, likely trapped mainly during late stages of crystallization of the magma. The most high volatile content in the melt inclusion are CO2 and H2O which appear strong Raman peaks for CO2 in the gas bubbles indicate abundances on high levels of CO2. Interpretation of result from a long-term flux of CO2 into the reservoir, either derived from more mafic magmas at depth or from reaction of magma in the reservoir with limestone and it may indicate that volcanic outgassing rates far exceed the amounts that can be supplied magmas.展开更多
Biocompatible carbon-spheres-based nanocomposites exhibit great potential in biomedical and clinical applications. In this contribution we report the first green photochemical synthesis of carbon spheres through in-si...Biocompatible carbon-spheres-based nanocomposites exhibit great potential in biomedical and clinical applications. In this contribution we report the first green photochemical synthesis of carbon spheres through in-situ enwrapping around silver nanoparticles(CS–Ag NPs). Since mesoporous carbon spheres can provide the location for combining Ag NPs and other agents, one-step synthesis of glutathione-stabilized CS–Ag NPs could be readily realized by photoreduction. TEM characterization of CS–Ag NPs nanocomposites illustrates that Ag NPs were superbly wrapped inside the carbon spheres and also adhered to the surfaces of the carbon spheres. These porous CS–Ag NPs show excellent fluorescence and effective antibacterial efficiency, exhibiting ideal lengthened activities against Escherichia coli and Staphylococcus aureus compared with bare Ag NPs. The relevant rationale behind it could be attributed to the fact that CS–Ag NPs nanocomposites can provide some excellent niches for the durable and slow release of silver ions. This raises the possibility of promising applications of CS–Ag NPs nanocomposites as excellent antibacterial agents for the efficient monitoring of some disease-related bacteria.展开更多
文摘通过溶胶-凝胶法合成了硅酸锆包裹氧化改性炭黑(Zr Si O4/C)色料,采用XRD、色度仪和TEM等分析手段对色料进行表征。研究了改性C的球磨方式、溶剂种类和成型压力等工艺因素对Zr Si O4合成及Zr Si O4/C色料色度的影响规律。结果表明:着色剂C粉的形貌对包裹色料的色度影响明显,手磨过筛后的C粉呈颗粒状,分布均匀,制得的色料黑度较高,而经过振动球磨后的C呈絮状,不宜进行包裹;水溶剂会导致异质聚合Si-O-Zr键断裂,形成同质聚合,不利于包裹体Zr Si O4的低温合成,从而影响色料的呈色;过高的成型压力阻碍了Zr Si O4合成过程中的Si F4气相传质,影响了Zr Si O4的正常生长,不利于炭黑包裹和色料的发色。
文摘To characterize the magma that gave rise to explosive eruptions of Merapi volcano in October-November 2010, melt inclusions and juvenile components fiom the eruption deposits have been analyzed. Major-element compositions of whole-rocks were analyzed by X-ray fluorescence and trace elements, including the Rare Earth Elements by inductively coupled plasma mass spectrometry. Melt inclusions and the host minerals were analyzed using energy-dispersive X-ray spectroscopy and CO2 and H20 in melt inclusions, and their associated bubbles, were analyzed using laser Raman spectrometry. The compositions of the whole-rock eruption products are basaltic and esite that slightly sifting of SiO2 and K20 composition to previous eruption products, whereas the melt inclusions in pyroxene, plagioclase and hornblende are dacite to rhyolite, likely trapped mainly during late stages of crystallization of the magma. The most high volatile content in the melt inclusion are CO2 and H2O which appear strong Raman peaks for CO2 in the gas bubbles indicate abundances on high levels of CO2. Interpretation of result from a long-term flux of CO2 into the reservoir, either derived from more mafic magmas at depth or from reaction of magma in the reservoir with limestone and it may indicate that volcanic outgassing rates far exceed the amounts that can be supplied magmas.
基金supported by the National Basic Research Program of China(2010CB732404)the National Natural Science Foundation of China(81325011,21327902,21175020)+1 种基金the National High Technology Research and Development Program of China(2012AA022703)the Suzhou Science&Technology Major Project(ZXY2012028)
文摘Biocompatible carbon-spheres-based nanocomposites exhibit great potential in biomedical and clinical applications. In this contribution we report the first green photochemical synthesis of carbon spheres through in-situ enwrapping around silver nanoparticles(CS–Ag NPs). Since mesoporous carbon spheres can provide the location for combining Ag NPs and other agents, one-step synthesis of glutathione-stabilized CS–Ag NPs could be readily realized by photoreduction. TEM characterization of CS–Ag NPs nanocomposites illustrates that Ag NPs were superbly wrapped inside the carbon spheres and also adhered to the surfaces of the carbon spheres. These porous CS–Ag NPs show excellent fluorescence and effective antibacterial efficiency, exhibiting ideal lengthened activities against Escherichia coli and Staphylococcus aureus compared with bare Ag NPs. The relevant rationale behind it could be attributed to the fact that CS–Ag NPs nanocomposites can provide some excellent niches for the durable and slow release of silver ions. This raises the possibility of promising applications of CS–Ag NPs nanocomposites as excellent antibacterial agents for the efficient monitoring of some disease-related bacteria.
