Synthesis, characterization, and photocatalytic analysis of CNT/TiO2 composites derived from MWCNTs and titanium sources
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摘要: 采用多壁碳纳米管(MWCNTs)为原料,分别以异丙醇钛 (TIP)、丙氧基钛(TPP) 和四丁氧基钛(TNB)为钛源,苯作为溶剂,制备了CNT/TiO2复合材料。利用 N2 吸附等温线,扫描电子显微镜(SEM), X射线衍射(XRD), 能量分散性X射线分析 (EDX) 以及紫外吸收光谱对所制CNT/TiO2复合材料进行了表征。并在紫外光照射下,通过亚甲蓝(MB, C16H18N3S · Cl · 3H2O)水溶液的转变测试了CNT/TiO2复合材料的光催化性能。研究结果表明:CNT/TiO2复合材料对MB的降解作用不仅有MWCNT的吸附性和TiO2的光催化性,而且还有MWCNT和 TiO2之间的电子转移性。
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关键词:
- 多壁碳纳米管 /
- 钛源 /
- CNT/TiO2复合材料 /
- 光催化分解
Abstract: CNT/TiO2 composites were prepared using multiwalled carbon nanotubes (MWCNTs) as a starting material, and titanium(IV) isopropoxide, titanium(IV) propoxide and titanium(IV) nbutoxide as titanium sources and benzene as a solvent. The composites were characterized by N2 adsorption, scanning electron microscopy, Xray diffraction, energy dispersive X-ray analysis, and UV-vis absorption spectroscopy. The photoactivity of the prepared materials was evaluated by the conversion of methylene blue (MB, C16H18N3S · Cl · 3H2O) in aqueous solution under UV irradiation. It can be found that the MB removal effect of the CNT/TiO2 composites is not only due to the adsorption of MWCNTs and the photocatalytic degradation of TiO2 but also to electron transfer between MWCNTs and TiO2.-
Key words:
- MWCNT /
- Titanium sources /
- CNT/TiO2 composites /
- Photocatalytic decomposition
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