In-situ one-pot hydrothermal synthesis of carbon-TiO2 nanocomposites and their photocatalytic applications
In-situ one-pot hydrothermal synthesis of carbon-TiO2 nanocomposites and their photocatalytic applications
复制标题
碳-TiO2纳米复合材料的原位一锅水热合成及其光催化应用
DOI：
10.1016/j.jece.2017.11.047
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发表时间：
2017-12
影响因子：
7.7
通讯作者：
Wang Hui-Long
中科院分区：
文献类型：
--
作者：
Qi Hui-Ping;Liu Yan-Zhen;Chang Le;Wang Hui-Long
以钛酸四丁酯和葡萄糖为共前驱体，采用一锅水热合成法制备了晶态碳改性二氧化钛复合材料(C-TiO2)。这种方法可以避免制备碳掺杂二氧化钛材料的昂贵的模板和繁琐的步骤。用X射线衍射仪、透射电子显微镜、傅立叶变换红外光谱、氮气吸附-脱附、元素分析、XPS和UV-Vis/DRS等手段对C-TiO2光催化剂的形貌和结构进行了表征。实验结果表明，二氧化钛纳米颗粒均匀分散在碳层上。与纯二氧化钛相比，制备的C-TiO2复合材料具有更大的比表面积、更高的载流子对分离效率和更大的可见光吸光度。制备的C-TiO2样品在可见光照射下对有机染料污染物(罗丹明B和亚甲基蓝)表现出良好的光催化活性，且其光催化活性优于纯的TiO2光催化剂。光催化效率的提高可以归因于碳物种和二氧化钛纳米晶的协同作用。
A simple and convenientin-situone-pot hydrothermal synthesis method was developed for preparing crystalline carbon modified titanium dioxide composite (C-TiO2) by using tetrabutyle titanate and glucose as co-precursors. Such a method can avoid the expensive templates and tedious procedures for the fabrication of carbon doped titanium dioxide materials. The morphology and microstructure characteristics of C-TiO2photocatalysts were characterized by means of XRD, TEM, FT-IR, N2adsorption-desorption measurements, elemental analysis, XPS and UV-vis/DRS. The experimental results showed that the TiO2nanoparticles were dispersed unanimously on carbon layer. The as prepared C-TiO2composites possessed larger specific surface area, higher separation efficiency of charge carrier pairs and greater visible light absorbance than pure TiO2. The fabricated C-TiO2samples showed excellent photocatalytic activities towards organic dye pollutants (Rhodamine B and methylene blue) under visible light irradiation and the photoactivity of the C-TiO2samples was superior to pristine TiO2. The enhanced photocatalytic efficiency can be attributed to the synergetic effects of carbon species and TiO2nanocrystals.
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