CAJ | 학술논문

对多孔钛表面制备TiO2纳米管的阳极氧化工艺进行研究。在两种电解质溶液中采用阳极氧化法分别对多孔钛和钛箔进行表面处理。一种电解质溶液是含有0.5%HF的冰醋酸，另一种电解质溶液是含有0.5%NH4F(质量分数)的乙二醇溶液(醇水体积比4：1)。结果表明：两种方法在钛箔上都可以生成TiO2纳米管，而多孔钛表面只能在NH4F电解质溶液中生成纳米管，HF溶液中过高的电流密度是纳米管在多孔钛基体上难以生成的主要原因。采用扫描电子显微镜和 X 射线衍射仪对不同基体上的 TiO2纳米管进行表征，相比钛箔基体上的纳米管管壁，多孔钛上的纳米管管壁更薄。对所制备的TiO2热处理研究表明，锐钛矿相在400°C时形成，并在700°C完全转变为金红石相。经450°C热处理样品的光催化性能最好。光催化性能也受到多孔钛孔隙率的影响，在孔隙率为60%时光催化性能最好。
대다공태표면제비TiO2납미관적양겁양화공예진행연구。재량충전해질용액중채용양겁양화법분별대다공태화태박진행표면처리。일충전해질용액시함유0.5%HF적빙작산，령일충전해질용액시함유0.5%NH4F(질량분수)적을이순용액(순수체적비4：1)。결과표명：량충방법재태박상도가이생성TiO2납미관，이다공태표면지능재NH4F전해질용액중생성납미관，HF용액중과고적전류밀도시납미관재다공태기체상난이생성적주요원인。채용소묘전자현미경화 X 사선연사의대불동기체상적 TiO2납미관진행표정，상비태박기체상적납미관관벽，다공태상적납미관관벽경박。대소제비적TiO2열처리연구표명，예태광상재400°C시형성，병재700°C완전전변위금홍석상。경450°C열처리양품적광최화성능최호。광최화성능야수도다공태공극솔적영향，재공극솔위60%시광최화성능최호。
Both Ti foil and porous Ti were anodized in 0.5%HF and in ethylene glycol electrolyte containing 0.5%NH4F (mass fraction) separately. The results show that TiO2 nanotubes can be formed on Ti foil by both processes, whereas TiO2 nanotubes can be formed on porous Ti only in the second process. The overhigh current density led to the failure of the formation nanotubes on porous Ti in 0.5%HF electrolyte. TiO2 nanotubes were characterized by SEM and XRD. TiO2 nanotubes on porous Ti were thinner than those on Ti foil. Anatase was formed when TiO2 nanotubes were annealed at 400 °C and fully turned into rutile at 700 °C. To obtain good photodegradation, the optimal heat treatment temperature of TiO2 nanotubes was 450 °C. The porosity of the substrates influenced photodegradation properties. TiO2 nanotubes on porous Ti with 60%porosity had the best photodegradation.