CAJ | 학술논문

为探索自支撑黑色TiO2在可见光下降解有机污染物的催化性能，以粒径为385 nm的单分散白色TiO2圆球为前驱体，再经H2氛500℃处理得到形貌尺寸未有明显改变的黑色TiO2圆球。 XRD和Raman结果表明黑色和白色TiO2圆球的晶型为锐钛矿相；与白色TiO2圆球相比，黑色TiO2圆球的比表面积增大但是其带隙宽度降低为2．72 eV；黑色、白色TiO2圆球和P25在可见光照下催化降解MB结果表明，黑色TiO2圆球具有较好的催化活性，循环使用10次后，其催化活性没有明显衰减。
위탐색자지탱흑색TiO2재가견광하강해유궤오염물적최화성능，이립경위385 nm적단분산백색TiO2원구위전구체，재경H2분500℃처리득도형모척촌미유명현개변적흑색TiO2원구。 XRD화Raman결과표명흑색화백색TiO2원구적정형위예태광상；여백색TiO2원구상비，흑색TiO2원구적비표면적증대단시기대극관도강저위2．72 eV；흑색、백색TiO2원구화P25재가견광조하최화강해MB결과표명，흑색TiO2원구구유교호적최화활성，순배사용10차후，기최화활성몰유명현쇠감。
In order to explore the catalytic properties of self-supported black TiO2 in degradation of organic pollutants under visible light,black TiO2 nanospheres were obtained by calcination under the H2 atmosphere at 500℃,using monodisperse white TiO2 nano-spheres with diameter of 385 nm as the precursor. No significant changes in the morphology and size were observed between the pre-cursor and the resulted black TiO2 nanospheres. XRD and Raman results showed that black and white TiO2 nanospheres are typical anatase phase;compared with white TiO2 nanospheres,the specific surface area of black TiO2 nanospheres increased but its band gap reduced to 2. 72 eV. Results of photocatalytic degradation of MB under visible light catalyzed by black,white TiO2 balls and P25,respectively,showed that the black TiO2 nanospheres have better catalytic activity,and its catalytic activity does not attenuate obviously after cycling 10 times.