中文摘要：

以氧化石墨烯与石墨烯为碳源，在熔盐介质中与钛粉反应原位生成石墨烯基TiC中间产物，并通过后续控制氧化制得石墨烯基TiO2复合光催化剂，结合FTIR、XRD、Raman、SEM等手段，对两种石墨烯材料的结构及形貌差异进行表征，并分析了其对所制复合材料结构、形貌及可见光催化活性的影响。结果表明，所制复合材料仍保持碳源的层片状结构，TiC和TiO2颗粒均匀包覆在碳源表面；以石墨烯为碳源更有利于表面原位生成TiC晶粒的生长，其晶体结构更为完善；两种结构的石墨烯基Ti02复合材料均对目标污染物亚甲基蓝有较强的吸附能力和可见光降解能力。

英文摘要：

With graphene oxide and graphene as carbon sources, graphene-based TiC intermediates were synthesized in molten salt medium by in-situ reaction with titanium powder. The graphene-based TiO2 composites were prepared thereafter through the oxidation process of intermediates. By means of FTIR, XRD, Raman and SEM, the differences in structure and morphology between two graphene materials were analyzed, and their effects on the morphology, structure as well as the visible light photocatalytic activityof prepared composites were investigated. The results show that the obtained composites exhibit a similar layer structure as the carbon sources, and the formed TiC and TiO2 parti- cles are uniformly covered on its surface. Besides, applying graphene as carbon source is more favora- ble to the growth of TiC crystalline structure. Both graphene oxide-based and graphene-based TiO2 composites mainifest remarkable adsoption and visible light photodegragation abilities for methylene blue as the target pollutant.