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通过静电纺丝方法,以聚丙烯腈(PAN)为成纤材料、钛酸四丁酯为钛源,制备含钛纳米纤维前驱体,经高温煅烧得到碳掺杂的二氧化钛(TiO_2)纳米纤维。采用电子显微镜、傅里叶红外光谱、热重、X-射线衍射仪等对纳米纤维的表面形态、化学组成、晶相结构等物理化学性能进行研究,并研究其光降解染料甲基橙的催化能力。结果表明在550℃下焙烧1h后,TiO_2主要以锐钛矿晶型结构存在,PAN经高温碳化对TiO_2形成碳掺杂。光降解研究结果表明,100mg碳掺杂TiO_2纳米纤维膜光催化降解甲基橙的效率为0.0336mg/h。
The precursor of titanium-containing nanofibers was prepared by electrospinning method using polyacrylonitrile (PAN) as the fiber-forming material and tetrabutyl titanate as the titanium source, and carbon-doped titanium dioxide (TiO 2) nanofibers were obtained by calcination at high temperature. The morphology, chemical composition, crystal structure and other physical and chemical properties of nanofibers were studied by using electron microscope, Fourier transform infrared spectroscopy, thermogravimetry and X-ray diffraction. The photocatalytic degradation of methyl orange ability. The results show that after calcined at 550 ℃ for 1h, TiO_2 mainly exists in the anatase crystal structure. PAN undergoes carbon doping at high temperature to form carbon doping of TiO_2. The results of photodegradation showed that the photocatalytic degradation of methyl orange by 100 mg carbon-doped TiO 2 nanofiber membrane was 0.0336 mg / h.