基于无金属还原的原始和阳离子掺杂导电钙钛矿的简便合成方法。

Facile metal-free reduction-based synthesis of pristine and cation-doped conductive mayenite.

作者信息

Khan Karim, Tareen Ayesha Khan, Elshahat Sayed, Muhammad Naseer, Li Jia, Aboodd Israa, Bibbò Luigi, Yadav Ashish, Rehman Sagar Rizwan Ur, Khan Usman, Ouyang Zhengbiao

机构信息

College of Electronic Science and Technology, THz Technical Research Center, Key Laboratory of Optoelectronics Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University Shenzhen 518060 China

Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China.

出版信息

RSC Adv. 2018 Jul 4;8(43):24276-24285. doi: 10.1039/c8ra02790k. eCollection 2018 Jul 2.

In the present study we synthesized conductive nanoscale CaAlO (hereafter denoted as CA:e) material, and reduced graphene oxide (rGO) was produced, which was unexpected; graphene oxide was removed after melting the sample. The conductivity of CA:e composites synthesized at 1550 °C was 1.25 S cm, and the electron concentration was 5.5 × 10 cm. The estimated BET specific surface area of the highly conductive sample was 20 m g. Pristine CA:e electride was obtained by melting the composite powder, but the nano size of CA:e particles could not be preserved; the value of conductivity was ∼28 S cm, electron concentration was ∼1.9 × 10 cm, and mass density was 93%. For CA V :e, where = 0.25 to 1, the conductivity improved to a maximum value of 40 S cm, and the electron density improved to ∼2.2 × 10 cm; this enhancement in conductivity was also proposed by a theoretical study but lacked any associated experimental support.

在本研究中，我们合成了导电纳米级CaAlO（以下简称CA:e）材料，并制备出了还原氧化石墨烯（rGO），这是出乎意料的；在样品熔化后氧化石墨烯被去除。在1550℃合成的CA:e复合材料的电导率为1.25 S/cm，电子浓度为5.5×10/cm。高导电样品的估计BET比表面积为20 m/g。通过熔化复合粉末获得了原始的CA:e电子化物，但CA:e颗粒的纳米尺寸无法保留；电导率值约为28 S/cm，电子浓度约为1.9×10/cm，质量密度为93%。对于CA V :e，其中 = 0.25至1，电导率提高到最大值40 S/cm，电子密度提高到约2.2×10/cm；理论研究也提出了电导率的这种增强，但缺乏任何相关的实验支持。