CAJ | 학술논문

为了解决水体中光催化剂的分离和回收问题，对纳米 TiO2的改性和固载化及其光催化特性进行了研究。首先以纳米 TiO2为原料，采用水热合成法制备 TiO2纳米管；再对 TiO2纳米管硅烷化，改善其表面性质；然后以聚氨酯(PU)膜片为载体负载 TiO2纳米管，制成了负载型 PU/TiO2薄膜的光催化材料。采用 X 射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、衰减全反射傅里叶变换红外光谱(ATR-FTIR)和扫描电子显微镜(SEM)等手段对催化剂进行了表征，结果表明硅烷化后的 TiO2纳米管能很好地接枝在 PU 薄膜表面。以300 W 高压汞灯为光源，萘普生为目标降解物，研究了负载 PU/TiO2薄膜的光催化活性和稳定性，结果表明其对目标物的降解具有较高活性，用乙醇冲洗即可多次重复使用，其催化活性能较长时间保持稳定。
위료해결수체중광최화제적분리화회수문제，대납미 TiO2적개성화고재화급기광최화특성진행료연구。수선이납미 TiO2위원료，채용수열합성법제비 TiO2납미관；재대 TiO2납미관규완화，개선기표면성질；연후이취안지(PU)막편위재체부재 TiO2납미관，제성료부재형 PU/TiO2박막적광최화재료。채용 X 사선연사(XRD)、부리협변환홍외광보(FTIR)、쇠감전반사부리협변환홍외광보(ATR-FTIR)화소묘전자현미경(SEM)등수단대최화제진행료표정，결과표명규완화후적 TiO2납미관능흔호지접지재 PU 박막표면。이300 W 고압홍등위광원，내보생위목표강해물，연구료부재 PU/TiO2박막적광최화활성화은정성，결과표명기대목표물적강해구유교고활성，용을순충세즉가다차중복사용，기최화활성능교장시간보지은정。
In order to solve the problem of separation and recovery of photocatalyst in water,the modification, immobilization and photocatalytic properties of TiO2 were studied.Firstly,TiO2 nanotubes were successfully synthe-sized by a hydrothermal method and silylated to improve its surface properties.Then,TiO2 nanotubes supported on polyurethane membrane were prepared to produce PU/TiO2 .Catalysts were characterized by XRD,FTIR,ATR-FT-IR and SEM.The results showed that silylated TiO2 nanotubes can graft well on the surface of the PU film.With a 300 W high pressure mercury lamp as light source,the photocatalytic activity and stability of composite materials for degrading naproxen were investigated.Experiments showed that the degradation of the target by PU/TiO2 photocata-lyst is highly active and the catalytic performance can remain stable for a long time by means of washing materials with ethanol.