ZrO2/Graphene nanocomposites are fabricated from graphene oxide by one-step, green, facile and low-cost SCCO2 method. The as-prepared nanocomposites are characterized by means of X-ray photoelectron, transmission elec...ZrO2/Graphene nanocomposites are fabricated from graphene oxide by one-step, green, facile and low-cost SCCO2 method. The as-prepared nanocomposites are characterized by means of X-ray photoelectron, transmission electron microscopy and catalytic chemiluminescence measurement. The ZrO2 nanoparticles with size of several nanometers are uniformly coated on the graphene surface. The chemiluminescence characteristic to ethanol of the as-prepared nanocomposite paper is also investigated. The nanocomposite paper obtained displays high catalytic chemiluminescence sensitivity and highly selectivity to the ethanol gas. This study provides a facile, green and low-cost route to prepare nanoscopic gas sensing devices with application in safe protection, food fermentation, medical process and traffic safe.展开更多
以纳米ZrO 、微米Al O 为原料,采用无压烧结方式制备了ZTA 复相陶瓷。结果表明:nano-ZrO 的 2 2 3 2加入有利于制备细晶ZTA 复相陶瓷。此外,nano-ZrO 的加入对 Al O 陶瓷的显微结构也产生影响,ZrO ...以纳米ZrO 、微米Al O 为原料,采用无压烧结方式制备了ZTA 复相陶瓷。结果表明:nano-ZrO 的 2 2 3 2加入有利于制备细晶ZTA 复相陶瓷。此外,nano-ZrO 的加入对 Al O 陶瓷的显微结构也产生影响,ZrO 颗粒以 2 2 3 2“晶内型”和晶界型两种形式存在。合理的配方组成及制备工艺有利于 Z r O 以四方亚稳相存在。Z r O 含量为 2 23 0 w t % 时,其四方相含量可达 6 9 %,有利于应力诱导相变增韧,该 Z T A 复相陶瓷的抗弯强度、断裂韧性分别达到 604MPa、6.87MPa·m1/2。展开更多
以石墨烯、Ni SO4、K2S2O8(饱和)、氨水、蒸馏水为反应物,经过常温回流制备得到Ni OOH/Ni(OH)2含量不同的石墨烯/Ni OOH/Ni(OH)2复合材料。扫描电子显微镜法(SEM)表征显示,Ni(OH)2/Ni OOH在石墨烯表面上形成多孔结构,负载了多孔Ni OOH/N...以石墨烯、Ni SO4、K2S2O8(饱和)、氨水、蒸馏水为反应物,经过常温回流制备得到Ni OOH/Ni(OH)2含量不同的石墨烯/Ni OOH/Ni(OH)2复合材料。扫描电子显微镜法(SEM)表征显示,Ni(OH)2/Ni OOH在石墨烯表面上形成多孔结构,负载了多孔Ni OOH/Ni(OH)2的石墨烯又进行了层层堆积。电化学性能测试显示,电极材料GP/Ni-5性能最佳,其在电流密度为100 m A/g时,首次可逆比容量为1 287.4 m Ah/g,80次循环后比容量保持在830 m Ah/g,而纯Ni OOH/Ni(OH)2首次可逆比容量为2 400.6 m Ah/g,80次循环后比容量已降至405.9 m Ah/g,表明石墨烯的加入大大提高了材料的稳定性。展开更多
文摘ZrO2/Graphene nanocomposites are fabricated from graphene oxide by one-step, green, facile and low-cost SCCO2 method. The as-prepared nanocomposites are characterized by means of X-ray photoelectron, transmission electron microscopy and catalytic chemiluminescence measurement. The ZrO2 nanoparticles with size of several nanometers are uniformly coated on the graphene surface. The chemiluminescence characteristic to ethanol of the as-prepared nanocomposite paper is also investigated. The nanocomposite paper obtained displays high catalytic chemiluminescence sensitivity and highly selectivity to the ethanol gas. This study provides a facile, green and low-cost route to prepare nanoscopic gas sensing devices with application in safe protection, food fermentation, medical process and traffic safe.
文摘以纳米ZrO 、微米Al O 为原料,采用无压烧结方式制备了ZTA 复相陶瓷。结果表明:nano-ZrO 的 2 2 3 2加入有利于制备细晶ZTA 复相陶瓷。此外,nano-ZrO 的加入对 Al O 陶瓷的显微结构也产生影响,ZrO 颗粒以 2 2 3 2“晶内型”和晶界型两种形式存在。合理的配方组成及制备工艺有利于 Z r O 以四方亚稳相存在。Z r O 含量为 2 23 0 w t % 时,其四方相含量可达 6 9 %,有利于应力诱导相变增韧,该 Z T A 复相陶瓷的抗弯强度、断裂韧性分别达到 604MPa、6.87MPa·m1/2。
文摘以石墨烯、Ni SO4、K2S2O8(饱和)、氨水、蒸馏水为反应物,经过常温回流制备得到Ni OOH/Ni(OH)2含量不同的石墨烯/Ni OOH/Ni(OH)2复合材料。扫描电子显微镜法(SEM)表征显示,Ni(OH)2/Ni OOH在石墨烯表面上形成多孔结构,负载了多孔Ni OOH/Ni(OH)2的石墨烯又进行了层层堆积。电化学性能测试显示,电极材料GP/Ni-5性能最佳,其在电流密度为100 m A/g时,首次可逆比容量为1 287.4 m Ah/g,80次循环后比容量保持在830 m Ah/g,而纯Ni OOH/Ni(OH)2首次可逆比容量为2 400.6 m Ah/g,80次循环后比容量已降至405.9 m Ah/g,表明石墨烯的加入大大提高了材料的稳定性。
