CAJ | 학술논문

以KBr和Ti(SO_4)_2为原料,通过水热法制备了高催化活性的溴掺杂纳米TiO_2(Br-TiO_2)光催化剂,利用XRD、XPS、TEM、BET和UV-Via DRS等测试手段对其进行了表征.通过苯酚降解实验评价了Br-TiO_2的光催化活性.结果表明,700℃焙烧、溴与钛的摩尔比为0.35:1时,Br-TiO_2具有最佳光催化活性.该催化剂为晶体发育完整的锐钛矿相TiO_2,粒径平均大小为50 nm,比表面积为16.81 m~2/g,在紫外区的吸收得到加强,光催化能力优于Degussa P-25.确定了降解苯酚的最佳条件:催化剂投加量为0.5 g/L,苯酚初始浓度为10 mg/L,pH值为6.0.
이KBr화Ti(SO_4)_2위원료,통과수열법제비료고최화활성적추참잡납미TiO_2(Br-TiO_2)광최화제,이용XRD、XPS、TEM、BET화UV-Via DRS등측시수단대기진행료표정.통과분분강해실험평개료Br-TiO_2적광최화활성.결과표명,700℃배소、추여태적마이비위0.35:1시,Br-TiO_2구유최가광최화활성.해최화제위정체발육완정적예태광상TiO_2,립경평균대소위50 nm,비표면적위16.81 m~2/g,재자외구적흡수득도가강,광최화능력우우Degussa P-25.학정료강해분분적최가조건:최화제투가량위0.5 g/L,분분초시농도위10 mg/L,pH치위6.0.
A novel bromine-doped TiO_2 photocatalyst was obtained by hydrothermal method with potassium bromide and titanium sulfate. The samples were characterized by XRD, XPS, TEM, BET and UV-Vis absor-bance spectra. Its photocatalytic activity was examined by degradation of phenol. The result shows that after cal-cination at 700 ℃ , when the ratio of bromine and titanium is 0. 35: 1, Br-TiO_2 has the best photocatalytic activi-ty. It is in anatase phase, the average particle size and the BET surface reaches 50 nm and 16. 81 m~2/g, respec-tively. It shows strong absorption in ultraviolet light region and the photocatalytic activity is higher than degussa P-25. The best degradation effect acquires at pH value 6. 0, catalyst dosage 0. 5 g/L, initial concentration of phenol 10 mg/L.