采用偶联剂、石灰石粉、纳米超细氧化物对环氧树脂砂基透水砖进行改性,试验结果表明:不同种类偶联剂对环氧树脂砂基透水砖均有增强作用,偶联剂的最佳用量为树脂质量的5%,石灰石粉和纳米超细氧化物对环氧树脂砂基透水砖具有一定的增强效...采用偶联剂、石灰石粉、纳米超细氧化物对环氧树脂砂基透水砖进行改性,试验结果表明:不同种类偶联剂对环氧树脂砂基透水砖均有增强作用,偶联剂的最佳用量为树脂质量的5%,石灰石粉和纳米超细氧化物对环氧树脂砂基透水砖具有一定的增强效果;当硅烷偶联剂和纳米SiO2的用量分别为环氧树脂质量的5%、2%,环氧树脂用量为覆膜砂质量的4%时,树脂砂基透水砖的强度和耐磨性能最佳,抗压强度为37.8 MPa,耐磨性为22 mm,此时透水速率为4.3 m L/(min·cm^2)。展开更多
Ultrafine cube-shape Ce2Sn2O7 nanoparticles crystallized in pure pyrochlore phase with a size of about 10 nm have been successfully synthesized by a facile hydrothermal method.Conditional experiments have been conduct...Ultrafine cube-shape Ce2Sn2O7 nanoparticles crystallized in pure pyrochlore phase with a size of about 10 nm have been successfully synthesized by a facile hydrothermal method.Conditional experiments have been conducted to optimize the processing parameters including temperature,pH,reaction duration,precipitator types to obtain phase-pure Ce2Sn2O7.The crystal structure,morphology and sizes and specific surface area have been characterized by X-ray diffractometer(XRD),Raman spectrum,transmission electron microscope(TEM),high resolution transmission electron microscope(HRTEM),and Brunauer-Emmett-Teller(BET).The as-synthesized Ce2Sn2O7 ultrafine nanocubes have been evaluated as electrode materials for pseudo-capacitors and lithium ion batteries.When testing as supercapacitors,a high specific capacitance of 222 F/g at 0.1 A/g and a good cycling stability with a capacitance retention of higher than 86%after 5000 cycle have been achieved.When targeted for anode material for lithium ion batteries,the nanocubes deliver a high specific reversible capacity of more than 900 mA·h/g at 0.05C rate.The rate capability and cycling performance is also very promising as compared with the traditional graphite anode.展开更多
文摘采用偶联剂、石灰石粉、纳米超细氧化物对环氧树脂砂基透水砖进行改性,试验结果表明:不同种类偶联剂对环氧树脂砂基透水砖均有增强作用,偶联剂的最佳用量为树脂质量的5%,石灰石粉和纳米超细氧化物对环氧树脂砂基透水砖具有一定的增强效果;当硅烷偶联剂和纳米SiO2的用量分别为环氧树脂质量的5%、2%,环氧树脂用量为覆膜砂质量的4%时,树脂砂基透水砖的强度和耐磨性能最佳,抗压强度为37.8 MPa,耐磨性为22 mm,此时透水速率为4.3 m L/(min·cm^2)。
基金Project(JCYJ20170817110251498)supported by the Basic Research Project of the Science and Technology Innovation Commission of Shenzhen,ChinaProject(2016TQ03C919)supported by the Guangdong Special Support for the Science and Technology Leading Young Scientist,ChinaProjects(21603094,21703096)supported by the National Natural Science Foundation of China
文摘Ultrafine cube-shape Ce2Sn2O7 nanoparticles crystallized in pure pyrochlore phase with a size of about 10 nm have been successfully synthesized by a facile hydrothermal method.Conditional experiments have been conducted to optimize the processing parameters including temperature,pH,reaction duration,precipitator types to obtain phase-pure Ce2Sn2O7.The crystal structure,morphology and sizes and specific surface area have been characterized by X-ray diffractometer(XRD),Raman spectrum,transmission electron microscope(TEM),high resolution transmission electron microscope(HRTEM),and Brunauer-Emmett-Teller(BET).The as-synthesized Ce2Sn2O7 ultrafine nanocubes have been evaluated as electrode materials for pseudo-capacitors and lithium ion batteries.When testing as supercapacitors,a high specific capacitance of 222 F/g at 0.1 A/g and a good cycling stability with a capacitance retention of higher than 86%after 5000 cycle have been achieved.When targeted for anode material for lithium ion batteries,the nanocubes deliver a high specific reversible capacity of more than 900 mA·h/g at 0.05C rate.The rate capability and cycling performance is also very promising as compared with the traditional graphite anode.
