A new fi ber optic sensor based on the oxidation of 2,4-dichlorophenol（DCP） catalyzed by iron（II） phthalocyanine（Fe（II）Pc） was developed for the determination of DCP. The optical oxygen sensing fi lm containin...A new fi ber optic sensor based on the oxidation of 2,4-dichlorophenol（DCP） catalyzed by iron（II） phthalocyanine（Fe（II）Pc） was developed for the determination of DCP. The optical oxygen sensing fi lm containing fl uorescence indicator Ru（bpy）3Cl2 was used to detect the consumption of oxygen in solution. Moreover, a lock-in amplifier was used to determine the lifetime of the sensor head by detecting its phase delay change. The results reveal that the sensor has a linear detection range of 1.0×10^-6- 9.0×10^-5 mol/L and a response time of 5 min. The sensor also has high selectivity, good repeatability and stability. It can be used effectively to determine DCP concentration in real samples.展开更多
The recycling of leather solid waste not only involves resource utilization and environmental protection but also has important significance for the sustainable development of the leather industry.In this paper,the le...The recycling of leather solid waste not only involves resource utilization and environmental protection but also has important significance for the sustainable development of the leather industry.In this paper,the leather waste was crushed into fibers,which were stabilized and mixed with nitrile-butadiene rubber(NBR).The mixture was milled and vulcanized and a composite NBR-SLF(Stabilized Leather Fiber)is prepared for sealing material.The physical and mechanical properties,water resistance,oil resistance and aging resistance of NBR-SLF were tested and analyzed.It is found that the optimized NBR-SLF not only reduces the cost of raw material,but also changes the physical and mechanical performance of NBR.As a sealing material,it satisfies the substitution of NBR in terms of hardness and thermal stability.Especially the anti-aging ability is better than NBR.展开更多
Heat treatment with the presence of hydrogen (H2) that react with GeE' centers (Ge≡) at high temperature will weaken the refractive index modulation of grating fabricated in hydrogen-loaded normal germanosilicate...Heat treatment with the presence of hydrogen (H2) that react with GeE' centers (Ge≡) at high temperature will weaken the refractive index modulation of grating fabricated in hydrogen-loaded normal germanosilicate fiber. Pre-annealing treatment of the above fiber was demonstrated to be able to enhance the grating's thermal stability effectively. 0.37-nm blue-shift of the reflected Bragg wavelength was observed.展开更多
基金Funded by the National Natural Science Foundation of China(Nos.61377092 and 51303115)
文摘A new fi ber optic sensor based on the oxidation of 2,4-dichlorophenol（DCP） catalyzed by iron（II） phthalocyanine（Fe（II）Pc） was developed for the determination of DCP. The optical oxygen sensing fi lm containing fl uorescence indicator Ru（bpy）3Cl2 was used to detect the consumption of oxygen in solution. Moreover, a lock-in amplifier was used to determine the lifetime of the sensor head by detecting its phase delay change. The results reveal that the sensor has a linear detection range of 1.0×10^-6- 9.0×10^-5 mol/L and a response time of 5 min. The sensor also has high selectivity, good repeatability and stability. It can be used effectively to determine DCP concentration in real samples.
基金This work was supported by the Chengdu Science and Technology Plan Project(2018-YF05-01219-SN).
文摘The recycling of leather solid waste not only involves resource utilization and environmental protection but also has important significance for the sustainable development of the leather industry.In this paper,the leather waste was crushed into fibers,which were stabilized and mixed with nitrile-butadiene rubber(NBR).The mixture was milled and vulcanized and a composite NBR-SLF(Stabilized Leather Fiber)is prepared for sealing material.The physical and mechanical properties,water resistance,oil resistance and aging resistance of NBR-SLF were tested and analyzed.It is found that the optimized NBR-SLF not only reduces the cost of raw material,but also changes the physical and mechanical performance of NBR.As a sealing material,it satisfies the substitution of NBR in terms of hardness and thermal stability.Especially the anti-aging ability is better than NBR.
基金This work was Jointly supported by the Combined Research Foundation, the National Natural Science Foundation of China, the Energy Conservation Investment Corporation of China (60177029), the Science Fund for Distinguished Young Scholars of Heilongjiang P
文摘Heat treatment with the presence of hydrogen (H2) that react with GeE' centers (Ge≡) at high temperature will weaken the refractive index modulation of grating fabricated in hydrogen-loaded normal germanosilicate fiber. Pre-annealing treatment of the above fiber was demonstrated to be able to enhance the grating's thermal stability effectively. 0.37-nm blue-shift of the reflected Bragg wavelength was observed.
