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Rational design of low-cost and highly-efficient bifunctional oxygen electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is currently critical for renewable energy storage and conversion devices. Herein, we represent a series of three-dimensional porous B and N co-doped graphene aerogels (BN-GAs) using NH4B5O8 as precursor for B and N source by hydrothermal method...
In this study, carbon quantum dots (CQDs)/bismuth oxyiodide (BiOI) materials have been synthesized via a reactable ionic liquid (IL) 1-hexyl-3-methyl-imidazolium iodine assisted solvothermal method. The introduction of IL was beneficial to construct the tight junctions between CQDs and BiOI. Based on the initial formation of strong-coupling between CQDs and IL, the tight junctions between CQDs and...
The molten salt reactor (MSR) is one of the six Generation IV reactors that is being reexamined today, owing to its unique fuel cycle capabilities and safety characteristics. IG-110 nuclear graphite a candidate material for constructing a MSR. However, the existence of large pores at its surface is a big problem due to the impregnation of molten salts and the diffusion of fission product gases into...
A non-contact method is proposed to characterize graphene at microwave frequency by combining Raman spectroscopy and Amphenol Precision Connector (APC-7). The CVD-grown graphene is transferred to the ring-shape Teflon substrate and characterized by Raman spectroscopy to estimate its doping density and the related Fermi energy. The graphene is then sandwiched between two APC-7 coaxial connectors and...
Isotropic pyrolytic carbon (IPyC) prepared at 1300°C by chemical vapor deposition was implanted with 129Xe26+ ions to obtain a wide range of information and understanding about the coating materials in nuclear energy field. Microstructure of the pristine and ion-implanted IPyC on nuclear graphite substrate was firstly investigated using polarized light microscopy, scanning and transmission electron...
Boron-doped isotropic pyrolytic carbon (pyrocarbon) was prepared by CVD using CH 4 +BCl 3 +H 2 as gaseous precursors. Microstructure of the deposited pyrocarbon on a graphite substrate was investigated using X-ray diffraction, X-ray photoelectron spectroscopy, polarized light microscopy, and scanning and transmission electron microscopy. It was found that the boron-containing...
Template silica materials with novel structures were synthesized by a sol-gel process and were used for the preparation of carbon replicas. Because the silica templates have thick skeleton walls and large textural pores, they can be molded to the required shape and size without cracking and shrinkage. By utilizing such templates, morphology and porosity control of the carbon materials were easily...
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