【摘要】 用溶胶-凝胶法制备Co掺杂TiO₂纳米晶,利用X-射线衍射（XRD）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,适量Co掺杂抑制TiO₂晶柱的成长,掺Co使TiO₂纳米晶的光谱响应范围向可见光拓展。在紫外光照射下,掺杂Co的TiO₂能有效促进光催化降解制浆黑液,显著提高制浆黑液中COD_Cr的去除效果,反应8h后,COD_Cr由反应前的480mg/L降至144mg/L,色度去除率可达到86.9%。更多还原

【Abstract】 TiO₂ nanoparticles pure and Co-doped were prepared by a sol-gel process and characterized by XRD and UV-Vis.The results indicate that the average particle size of TiO₂ crystal is about 10 nm at 400- and Co doping depresse the growth of anatase grains.The presence of Co ion in TiO₂ crystal is found to promote the photocatalytic activity of TiO₂ in degradation of black liquid from pulping and improved the removing of efficiency of CODcr greatly.Its CODcr was decreased from 480 mg/L to 144 mg/L and the removing rate of chroma of black liquid is up to 86.9%.更多还原