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Updated: Sep 27, 2025
Synthesis and Functionalization of 3D Nano-graphene Materials: Graphene Aerogels and Graphene Macro Assemblies
Published on: November 5, 2015
Preparation of graphene aerogel and application in photon-enhanced thermionic emission
Shiwei Guo1, Hongli Zhao1, Yanpeng Xu1
1School of Resources, Environment and Materials, Guangxi University 100 Daxue Road Nanning 530004 Guangxi Province China 838188224@qq.com zhaohl2019@163.com 861197640@qq.com 1028967072@qq.com 973890621@qq.com fuyuechun@126.com noblehe@gxu.edu.cn docsjh@gxu.edu.cn.
Abstract:
Photon-enhanced thermionic emission (PETE) is a novel concept of solar energy conversion in recent years. Porous 3D graphene aerogels (GA) were prepared by hydrothermal reduction of graphene oxide (GO). The morphology of GO and GA was characterized by scanning electron microscopy and transmission electron microscopy respectively. The functional groups of GO and GA were characterized by Electron Microscopy and Fourier Transform infrared spectroscopy. The PETE properties of the samples were tested by a self-made device. Thermoelectron emission can be detected when the energy density of the excitation laser was higher than 35 W. The efficiency of the device was between 8.14 × 10-6% and 1.89 × 10-5%, and the output voltage was about 1 V. Compared with 3D graphene powder and 2D graphene in the control group, GA has more significant and stable thermionic emission properties. GA is a promising cathode material for a PETE solar energy converter, and the conductivity of GA should be further optimized.
