CAJ | 학술논문

以盐酸羟胺为N源,按r(盐酸羟胺:钛酸四丁酯)分别为1:2,1:1,3:2,2:1和3:1掺杂,采用sol-gel法一步制备N掺杂纳米TiO_2.研究了焙烧温度和N掺杂量对样品晶相结构及其在紫外光和紫外-可见光下对罗丹明B光催化活性的影响.结果表明,增大N掺杂量可抑制样品由锐钛矿相向金红石相转变.r(盐酸羟胺:钛酸四丁酯)为2:1时,样品经500 ℃焙烧后对罗丹明B的紫外光催化降解率1 h内达54.81%,样品经600 ℃焙烧后对罗丹明B的紫外-可见光催化降解率2 h内可达99.13%.
이염산간알위N원,안r(염산간알:태산사정지)분별위1:2,1:1,3:2,2:1화3:1참잡,채용sol-gel법일보제비N참잡납미TiO_2.연구료배소온도화N참잡량대양품정상결구급기재자외광화자외-가견광하대라단명B광최화활성적영향.결과표명,증대N참잡량가억제양품유예태광상향금홍석상전변.r(염산간알:태산사정지)위2:1시,양품경500 ℃배소후대라단명B적자외광최화강해솔1 h내체54.81%,양품경600 ℃배소후대라단명B적자외-가견광최화강해솔2 h내가체99.13%.
The N-doped nano-TiO_2 (nano-N-TiO_2),which was doped with different mole ratio of hydroxylamine hydrochloride to tetrabutyl titanate (1:2,1:1,3:2,2:1 and 3:1),was prepared by a one-step sol-gel method using hydroxylamine hydrochloride as nitrogen source in the doping procedure.Influences of calcination temperature and mole ratio of hydroxylamine hydrochloride to tetrabutyl titanate on the crystal phase structure and photocatalytic activity of the prepared nano-N-TiO_2 samples for degradation of rhodamine B under UV and UV-Vis light were investigated.The results show that the crystal phase transformation for the nano-N-TiO_2 samples from anatase to rutile phase is restrained by increasing the N-doping amounts.When the mole ratio of hydroxylamine hydrochloride to tetrabutyl titanate is 2:1,the nano-N-TiO_2 sample calcined at 500 ℃ shows the photocatalytic degradation rate of 54.81% to rhodamine B within 1 h under UV light,while the nano-N-TiO_2 sample calcined at 600 ℃ shows the photocatalytic degradation rate of 99.13% to rhodamine B within 2 h under UV-Vis light.