The thermotropic phase transitions layer compound in the perovskite type （n-C）10)H)21)NH3)2ZnCl4 and （n-C）18)H)37)NH3)2ZnCl4 were synthesized and, at the same time, a series of mixtures C10Zn/C18Zn were prepared. ...The thermotropic phase transitions layer compound in the perovskite type （n-C）10)H)21)NH3)2ZnCl4 and （n-C）18)H)37)NH3)2ZnCl4 were synthesized and, at the same time, a series of mixtures C10Zn/C18Zn were prepared. The experimental binary phase diagram of C10Zn/C18Zn was established by means of differential scanning calorimetry （DSC） and X-ray diffraction. In the phase diagram, compound （n-C）10)H)21)NH3)（n-C）21)H)37)NH3)ZnCl4 and two eutectoid invariants were observed; two eutectoid temperatures are about 53 ℃ and 58 ℃. Contrasting with other similar systems, there are three noticeable solid solution ranges at the left and right boundary and middle of the phase diagram.展开更多
The widespread use of disposable batteries to power common electronic devices is a major source of e-waste.There are growing environmental and health concerns due to the expansion of e-waste around the world.Hence,dev...The widespread use of disposable batteries to power common electronic devices is a major source of e-waste.There are growing environmental and health concerns due to the expansion of e-waste around the world.Hence,developing a reli-able system for recycling old batteries has reached the top of the recycling priority list.The current study presents a novel approach to synthesis carbon nanoparticles(CNPs)from spent batteries via an eco-friendly method that offers economical,environment-friendly,and nontoxic approaches in comparison to conventional chemical methods.The synthesized nano-particles were characterized by field emission scanning electron microscopy(FE-SEM),energy-dispersive X-ray(EDX),powder X-ray diffractometry(XRD),UV-VIS absorption analysis(UV),Fourier transform infrared spectroscopy(FT-IR),Atomic force microscope(AFM),and thermo-gravimetric analysis(TGA).The average diameter of the synthesized particles was 40.16 nm,and the particles tended to be aspherical in shape.EDX analysis also predicted the presence of pure carbon,with some contamination arrived at 15%(in weight).This is a novel study in which nanocarbons were synthesized in a brine(7600×10^(-6))from a target(CNPs>75 nm),which paves the way for future use of CNPs derived from spent batteries and helps the environment by decreasing the amount of electronic waste dumped in landfills.展开更多
目的：建立微波消解电感耦合等离子体质谱测定人血白蛋白中痕量元素的方法。方法：人血白蛋白经过微波消解,并对电感耦合等离子体质谱仪器工作参数进行优化,采用标准模式和动能歧视模式同时对Cr、Mn、Fe、Co、Ni、Cu、Zn、Ag、Cd、Sb、C...目的：建立微波消解电感耦合等离子体质谱测定人血白蛋白中痕量元素的方法。方法：人血白蛋白经过微波消解,并对电感耦合等离子体质谱仪器工作参数进行优化,采用标准模式和动能歧视模式同时对Cr、Mn、Fe、Co、Ni、Cu、Zn、Ag、Cd、Sb、Cs、Ba、Tl、Pb 14种元素进行检测,RF功率1.4 k W,载气流速1.07 m L·min-1,辅助气流速1.20 m L·min-1,同心雾化器,蠕动泵转速40 r·min-1。采用混合内标（74Ge、103Rh、115In、175Lu、209Bi）进行校正。结果：痕量元素的检测限为0.01-0.21μg·L-1,方法精密度为0.1%-5.5%,准确度为81.9%-116.8%,回收率为96.0%-113.0%。用该方法对国家标准物质头发成分GBW07601（GSH-1）进行分析测定,各微量元素测定值在标准值的范围内。结论：本方法适用于人血白蛋白中痕量元素的测定。展开更多
文摘The thermotropic phase transitions layer compound in the perovskite type （n-C）10)H)21)NH3)2ZnCl4 and （n-C）18)H)37)NH3)2ZnCl4 were synthesized and, at the same time, a series of mixtures C10Zn/C18Zn were prepared. The experimental binary phase diagram of C10Zn/C18Zn was established by means of differential scanning calorimetry （DSC） and X-ray diffraction. In the phase diagram, compound （n-C）10)H)21)NH3)（n-C）21)H)37)NH3)ZnCl4 and two eutectoid invariants were observed; two eutectoid temperatures are about 53 ℃ and 58 ℃. Contrasting with other similar systems, there are three noticeable solid solution ranges at the left and right boundary and middle of the phase diagram.
文摘The widespread use of disposable batteries to power common electronic devices is a major source of e-waste.There are growing environmental and health concerns due to the expansion of e-waste around the world.Hence,developing a reli-able system for recycling old batteries has reached the top of the recycling priority list.The current study presents a novel approach to synthesis carbon nanoparticles(CNPs)from spent batteries via an eco-friendly method that offers economical,environment-friendly,and nontoxic approaches in comparison to conventional chemical methods.The synthesized nano-particles were characterized by field emission scanning electron microscopy(FE-SEM),energy-dispersive X-ray(EDX),powder X-ray diffractometry(XRD),UV-VIS absorption analysis(UV),Fourier transform infrared spectroscopy(FT-IR),Atomic force microscope(AFM),and thermo-gravimetric analysis(TGA).The average diameter of the synthesized particles was 40.16 nm,and the particles tended to be aspherical in shape.EDX analysis also predicted the presence of pure carbon,with some contamination arrived at 15%(in weight).This is a novel study in which nanocarbons were synthesized in a brine(7600×10^(-6))from a target(CNPs>75 nm),which paves the way for future use of CNPs derived from spent batteries and helps the environment by decreasing the amount of electronic waste dumped in landfills.
文摘目的：建立微波消解电感耦合等离子体质谱测定人血白蛋白中痕量元素的方法。方法：人血白蛋白经过微波消解,并对电感耦合等离子体质谱仪器工作参数进行优化,采用标准模式和动能歧视模式同时对Cr、Mn、Fe、Co、Ni、Cu、Zn、Ag、Cd、Sb、Cs、Ba、Tl、Pb 14种元素进行检测,RF功率1.4 k W,载气流速1.07 m L·min-1,辅助气流速1.20 m L·min-1,同心雾化器,蠕动泵转速40 r·min-1。采用混合内标（74Ge、103Rh、115In、175Lu、209Bi）进行校正。结果：痕量元素的检测限为0.01-0.21μg·L-1,方法精密度为0.1%-5.5%,准确度为81.9%-116.8%,回收率为96.0%-113.0%。用该方法对国家标准物质头发成分GBW07601（GSH-1）进行分析测定,各微量元素测定值在标准值的范围内。结论：本方法适用于人血白蛋白中痕量元素的测定。
