CAJ | 학술논문

利用聚合-热转化两步法,以TiCl_4作催化剂和Ti源,由糠醇单体聚合制备出了具有共轭结构的高分子(CPF)和TiO_2的纳米复合催化材料(TiO_2/CPF);用TEM、XRD、FT-IR和UV-Vis等技术对其进行了表征,以亚甲基蓝(MB)为目标污染物研究了该材料在自然光条件下的催化性能.结果表明,由该方法可以得到纳米级TiO_2/CPF复合材料,其中TiO_2的结构为锐钛矿型,CPF具有大的共轭结构,且与TiO_2之间存在强相互作用.CPF与TiO_2的复合将TiO_2的光谱响应拓展到了整个紫外-可见区,极大地改善了TiO_2在自然光条件下的催化性能.在自然光条件下,该复合材料,能够在5 min将MB溶液完全脱色,COD去除率达93.9%;重复利用6次对MB溶液的脱色率依然在95%以上,而纯TiO_2在紫外光照射3 h时COD去除率仅为54.4%.
이용취합-열전화량보법,이TiCl_4작최화제화Ti원,유강순단체취합제비출료구유공액결구적고분자(CPF)화TiO_2적납미복합최화재료(TiO_2/CPF);용TEM、XRD、FT-IR화UV-Vis등기술대기진행료표정,이아갑기람(MB)위목표오염물연구료해재료재자연광조건하적최화성능.결과표명,유해방법가이득도납미급TiO_2/CPF복합재료,기중TiO_2적결구위예태광형,CPF구유대적공액결구,차여TiO_2지간존재강상호작용.CPF여TiO_2적복합장TiO_2적광보향응탁전도료정개자외-가견구,겁대지개선료TiO_2재자연광조건하적최화성능.재자연광조건하,해복합재료,능구재5 min장MB용액완전탈색,COD거제솔체93.9%;중복이용6차대MB용액적탈색솔의연재95%이상,이순TiO_2재자외광조사3 h시COD거제솔부위54.4%.
Nanosized TiO_2/CPF complex catalyst was successfully prepared through a two-step method from furancarbinol monomer and TiCl_4 used as the catalyst and Ti source and was characterized by TEM,XRD,FT-IR and UV-Vis techniques.Its photocatalytic property was evaluated by using the degradation of methylene blue (MB) dye solution as model reaction under the irradiation of natural light.The results showed that the nanosized TiO_2/CPF complex material could be obtained through the said method.The crystalline structure of TiO_2 in the complex nanomaterials was anatase.Having a large conjugated structure,CPF was closely linked with TiO_2 by a strong interaction.Introducing CPF into TiO_2 extended the photo response of TiO_2 from UV to visible region and the catalytic property was greatly improved under the natural light.The TiO_2/CPF nano-sized material could fully decolorize the dye MB and its COD removal reached 93.9% in 5 min under the irradiation of natural light,while in the case of TiO_2 the COD removal rate of the MB solution only reached 54.5% in 3 h under the illumination of a 250 W high-pressure lamp.