Noble metal Ag nanoparticles with unique surface plasmon resonance property have attracted much attention recently in the field of photocatalysis. Based on the advantages of Ag nanoparticles and semiconductor CeO2, a ...Noble metal Ag nanoparticles with unique surface plasmon resonance property have attracted much attention recently in the field of photocatalysis. Based on the advantages of Ag nanoparticles and semiconductor CeO2, a novel plasmonic photocatalyst Ag-AgCl/CeO2 was prepared with a facile route. The as-prepared samples were characterized using scanning and transmission electron microscopy, X-ray photoelectron spectroscopy and UV-vis diffusion re?ection spectroscopy. This metal-semiconductor nanocomposite plasmonic photocatalyst exhibited a high visible-light photocatalytic activity and good stability for photocatalytic degradation of methyl orange in water. Ag-AgCl/CeO2 will be a potentially promising plasmonic photocatalysts for organic pollutant degradation and water purification.展开更多
Standard electrode potentials E° of Ag-AgC1 electrode in molality scale and acidity constants of glyeine pK_1° at constant molality of NaCl (1.0 mol·kg^(-1)) in 5 and 15 mass% glucose-water mixed solven...Standard electrode potentials E° of Ag-AgC1 electrode in molality scale and acidity constants of glyeine pK_1° at constant molality of NaCl (1.0 mol·kg^(-1)) in 5 and 15 mass% glucose-water mixed solvents over a range of temperatures from 278.15 to 318.15 K were determined from precise emf measurements.The dependence of acidity constant on temperature is given as a function of the thermodynamic temperature T by an empirical equation, pK_1° =A_1(K/T)-A_2+A_3(T/K).The corresponding thermodynamic quantities of the first dissociation process of glycine were calculated and the effects of both tho solvent and the salt on them were also discussed.展开更多
使用烧结法制备了Ag/AgCl固态不极化海洋电场电极,利用聚丙烯腈碳纤维T300制备了电容型海洋电场电极。研究了不极化电极和电容型电极探测海洋电场的原理,提出了两种电极的使用方法并研究了其探测性能。使用电化学工作站对两种电极进了...使用烧结法制备了Ag/AgCl固态不极化海洋电场电极,利用聚丙烯腈碳纤维T300制备了电容型海洋电场电极。研究了不极化电极和电容型电极探测海洋电场的原理,提出了两种电极的使用方法并研究了其探测性能。使用电化学工作站对两种电极进了循环伏安测量和电极对极差跟踪;使用低频低噪声放大器对两种电极的自噪声稳定速度和大小进行对比测量;在自制水槽中测试了两种电极在不同频率下的响应性能。试验结果表明两种电极均可测量1 m Hz以上的交变海洋电场;相比于Ag/AgCl电极,碳纤维电极具有极差小和自噪声稳定速度快的特点;稳定后两种电极的自噪声均为1 n V/√Hz@1 Hz。展开更多
文摘Noble metal Ag nanoparticles with unique surface plasmon resonance property have attracted much attention recently in the field of photocatalysis. Based on the advantages of Ag nanoparticles and semiconductor CeO2, a novel plasmonic photocatalyst Ag-AgCl/CeO2 was prepared with a facile route. The as-prepared samples were characterized using scanning and transmission electron microscopy, X-ray photoelectron spectroscopy and UV-vis diffusion re?ection spectroscopy. This metal-semiconductor nanocomposite plasmonic photocatalyst exhibited a high visible-light photocatalytic activity and good stability for photocatalytic degradation of methyl orange in water. Ag-AgCl/CeO2 will be a potentially promising plasmonic photocatalysts for organic pollutant degradation and water purification.
基金Project supported by the National Natural Science Foundation of China.
文摘Standard electrode potentials E° of Ag-AgC1 electrode in molality scale and acidity constants of glyeine pK_1° at constant molality of NaCl (1.0 mol·kg^(-1)) in 5 and 15 mass% glucose-water mixed solvents over a range of temperatures from 278.15 to 318.15 K were determined from precise emf measurements.The dependence of acidity constant on temperature is given as a function of the thermodynamic temperature T by an empirical equation, pK_1° =A_1(K/T)-A_2+A_3(T/K).The corresponding thermodynamic quantities of the first dissociation process of glycine were calculated and the effects of both tho solvent and the salt on them were also discussed.
文摘使用烧结法制备了Ag/AgCl固态不极化海洋电场电极,利用聚丙烯腈碳纤维T300制备了电容型海洋电场电极。研究了不极化电极和电容型电极探测海洋电场的原理,提出了两种电极的使用方法并研究了其探测性能。使用电化学工作站对两种电极进了循环伏安测量和电极对极差跟踪;使用低频低噪声放大器对两种电极的自噪声稳定速度和大小进行对比测量;在自制水槽中测试了两种电极在不同频率下的响应性能。试验结果表明两种电极均可测量1 m Hz以上的交变海洋电场;相比于Ag/AgCl电极,碳纤维电极具有极差小和自噪声稳定速度快的特点;稳定后两种电极的自噪声均为1 n V/√Hz@1 Hz。
