摘要
通过sol-gel法制备掺杂Ni2+、Co2+和Ni2+-Co2+共掺杂的纳米TiO2,利用X-射线衍射(XRD)、透射电子显微镜(TEM)和紫外-可见光谱(UV-Vis)对样品进行表征。结果表明:400℃时,粒子平均粒径为10nm左右,Ni2+、Co2+离子共掺杂抑制纳米TiO2晶粒的成长,使TiO2的光谱响应范围向可见光拓展。在紫外光照射下,Ni2+、Co2+离子共掺杂的TiO2能有效提高光催化降解制浆蒸煮黑液的效果,反应8h,体系中的CODCr可由反应前的480mg/l降至192mg/l,色度去除率可达到88.7%。
TiO2 nanoparticles pure and Ni^2+-doped, Co^2+-doped and Ni^2+-Co^2+ doped were prepared by a sol-gel process and characterized by XRD, TEM, UV-Vis. The results indicate that the average particle size of TiO2 crystal is about 10 nm at 400℃ and that Ni^2+-Co^2+ doping inhibits the growth of TiO2, making the spectral response range of TiO2 extended to the visible light. Under the UV-irradiation, Ni^2+-doped, Co^2+-doped and Ni^2+-Co^2+ doped can improve the effect of photocatalytic degradation of pulping-cooking black liquor, after 8 hours reaction, the CODCr is decreased from 480 mg/L to 192 mg/L and the removing rate of chroma is up to 88.7 %.
出处
《中华纸业》
CAS
北大核心
2005年第12期64-67,共4页
China Pulp & Paper Industry
基金
山东省中青年科学家科研奖励基金资助项目(No.2004BS04009)
教育部科学技术研究重点项目(No.205088)
山东省教育厅科研发展计划项目(No.J05D10)
胶体与界面化学教育部重点实验室(山东大学)开放基金资助项目(No.200507)。
关键词
纳米TIO2
光催化
共掺杂
蒸煮黑液
TiO2 nanoparticles
photocatalysis
doped
cooking black liquor