CAJ | 학술논문

采用溶胶-凝胶法分别制备了铁镧共掺TiO2和锌镧共掺TiO2纳米微粒,以罗丹明B为目标降解物,探讨了焙烧条件、掺杂量等制备条件,并考察了光催化降解罗丹明B的催化性能.结果表明,Zn-La-TiO2最佳焙烧条件为：500℃,3.5 h,Fe-La-TiO2最佳焙烧条件为：400℃,6.5 h；在紫外光条件下,Zn-La-TiO2最佳掺杂量为掺锌0.9%、掺镧0.8%,Fe-La-TiO2最佳掺杂量为掺铁0.9%、掺镧1.1%；随着催化降解时间延长,降解率提高；与纯TiO2相比,经双元素掺杂的TiO2吸附性能减弱；在太阳光下,与纯TiO2相比,Fe-La-TiO2光催化活性大大降低,Zn-La-TiO2光催化活性也有一定程度的降低.
채용용효-응효법분별제비료철란공참TiO2화자란공참TiO2납미미립,이라단명B위목표강해물,탐토료배소조건、참잡량등제비조건,병고찰료광최화강해라단명B적최화성능.결과표명,Zn-La-TiO2최가배소조건위：500℃,3.5 h,Fe-La-TiO2최가배소조건위：400℃,6.5 h；재자외광조건하,Zn-La-TiO2최가참잡량위참자0.9%、참란0.8%,Fe-La-TiO2최가참잡량위참철0.9%、참란1.1%；수착최화강해시간연장,강해솔제고；여순TiO2상비,경쌍원소참잡적TiO2흡부성능감약；재태양광하,여순TiO2상비,Fe-La-TiO2광최화활성대대강저,Zn-La-TiO2광최화활성야유일정정도적강저.
Nano-sized photocatalyst of Fe-La codoped TiO2 and Zn-La codoped TiO2 were prepared by sol-gel method. Preparation conditions such as calcination conditions and doping of Fe-La codoped TiO2 and Zn-La codoped TiO2 were evaluated by the photocatalytic decomposition of Rhodamine B. The results showed that the optimum baking conditions of Zn-La-TiO2 and Fe-La-TiO2 were: 500 ℃, 3.5 h and 400 ℃, 6.5 h. The optimal doped amount of Zn-La-TiO2 and Fe-La-TiO2 were: 0.9% of Zn, 0.8% of La and 0.9% of Fe, 1.1% of La. With the degradation time prolonged, the degradation rate increased. Compared with pure TiO2, the adsorption properties of TiO2 with double element doping weaken. In the sun, compared with the pure TiO2, the photocatalytic activity of Fe-La-TiO2 was greatly reduced and the photocatalytic activity of Zn-La-TiO2 was reduced to a certain extent.