摘要：【中文】本发明采用固相微波还原法制备出高品质石墨烯，将其与乙酸银粉末进行干法共混，通过固相微波还原法快速制备得到高纯度的纳米银负载石墨烯基导热复合填料。由本发明制备方法得到的石墨烯表面负载的纳米银分布均匀、结晶性好，且本发明制备方法工艺高效，安全环保且产物纯净。该纳米银负载的石墨烯基导热复合填料可用于导热材料领域，可有效提高电子器件表面的散热效率，具有良好的工业化应用前景。 【EN】According to the invention, high-quality graphene is prepared by a solid-phase microwave reduction method, and is dry-blended with silver acetate powder, so that the high-purity nano-silver loaded graphene-based heat-conducting composite filler is rapidly prepared by the solid-phase microwave reduction method. The nano silver loaded on the surface of the graphene obtained by the preparation method disclosed by the invention is uniform in distribution and good in crystallinity, and the preparation method disclosed by the invention is efficient in process, safe and environment-friendly and the product is pure. The nano-silver loaded graphene-based heat-conducting composite filler can be used in the field of heat-conducting materials, can effectively improve the heat-radiating efficiency of the surface of an electronic device, and has a good industrial application prospect.

摘要：【中文】一种三维氟氮掺杂石墨烯/二氧化钛复合材料及制备方法，涉及纳米复合材料领域。首先将氧化石墨烯加入去离子水中制得氧化石墨烯分散液；然后将氟钛酸铵和尿素加入到氧化石墨烯分散液中，分散均匀后进行水热反应得到三维氟氮石墨烯/二氧化钛凝胶，并进行冷冻干燥处理，得到三维氟氮掺杂石墨烯/二氧化钛预产物；最后将三维氟氮掺杂石墨烯/二氧化钛预产物进行高温煅烧处理，即制得三维氟氮掺杂石墨烯/二氧化钛复合材料。通过氟和氮元素的掺杂改性，显著提高三维石墨烯的电导率和电子迁移率，有效抑制二氧化钛光生电子‑空穴对复合，三维石墨烯为二氧化钛电子的高效传输提供载体，同时能高效吸附污染物，进一步提高光催化性能。 【EN】A three-dimensional fluorine-nitrogen doped graphene/titanium dioxide composite material and a preparation method thereof relate to the field of nano composite materials. Firstly, adding graphene oxide into deionized water to prepare a graphene oxide dispersion liquid; then adding ammonium fluotitanate and urea into the graphene oxide dispersion liquid, uniformly dispersing, then carrying out hydrothermal reaction to obtain three-dimensional fluorine-nitrogen graphene/titanium dioxide gel, and carrying out freeze drying treatment to obtain a three-dimensional fluorine-nitrogen doped graphene/titanium dioxide pre-product; and finally, carrying out high-temperature calcination treatment on the three-dimensional fluorine-nitrogen doped graphene/titanium dioxide pre-product to obtain the three-dimensional fluorine-nitrogen doped graphene/titanium dioxide composite material. Through doping modification of fluorine and nitrogen elements, the conductivity and the electron mobility of the three-dimensional graphene are remarkably improved, the recombination of titanium dioxide photo-generated electron-hole pairs is effectively inhibited, the three-dimensional graphene provides a carrier for efficient transmission of titanium dioxide electrons, pollutants can be efficiently adsorbed, and the photocatalytic performance is further improved.

摘要：【中文】本发明公开了一种纳米金属/石墨烯复合填料的制备方法及其应用，属于复合材料制备技术领域。本发明通过在制得的氨基化氧化石墨烯溶液中加入金属盐，采用微波反应装置快速实现金属离子、氨基化氧化石墨烯的还原，最终得到纳米金属/石墨烯复合填料。本发明方法制备得到的复合填料导电性好、比表面积大、分散性好；复合填料中纳米金属均匀地分散在石墨烯表面，从而解决了现有技术中功能填料在材料体系中易团聚和分散稳定性差等问题；本发明方法工艺简单，绿色环保，适合工业化规模生产。 【EN】The invention discloses a preparation method and application of a nano metal/graphene composite filler, and belongs to the technical field of composite material preparation. According to the invention, metal salt is added into the prepared aminated graphene oxide solution, and a microwave reaction device is adopted to rapidly realize the reduction of metal ions and aminated graphene oxide, so that the nano metal/graphene composite filler is finally obtained. The composite filler prepared by the method has good conductivity, large specific surface area and good dispersibility; the nano metal in the composite filler is uniformly dispersed on the surface of the graphene, so that the problems that the functional filler is easy to agglomerate in a material system and has poor dispersion stability in the prior art are solved; the method has simple process, is green and environment-friendly, and is suitable for industrial mass production.