S,W共掺杂球形纳米TiO₂复合材料的制备及太阳光催化性能

Preparation of S,W-Doped Spherical TiO₂ Nanocomposites and Photocatalytic Performance under Sunshine Irradiation

摘要: 以硫脲为S源、NaWO₄·2H₂O为W源采用改性溶胶–凝胶法制备S,W共掺杂的球形纳米TiO₂复合材料，并以10 mg/L的甲基橙溶液为底物测定了其太阳光催化性能。结果表明，当S,W掺杂质量分数为5%，制备时的焙烧温度为500℃，甲基橙溶液的pH值为4时，复合材料的太阳光催化性能最高，甲基橙溶液太阳光照射6 h降解率达到99.8%。

Abstract: The S,W co-doped spherical TiO₂ nanocomposites were prepared by modified sol-gel method using thiourea as a source of S and NaWO₄·2H₂O as source of W. Photocatalytic activity of the nanocomposites for degradation of methyl orange under sunshine irradiation was studied. The experimental results showed that when the doping amount of S,W is 5%, the TiO₂ nanocomposites calcined at 500˚C exhibited the highest photocatalytic activity. The degradation rate of 10 mg L−1 methyl orange solution reached approximately 99.8% under sunshine irradiation for 6 h when the pH value of the methyl solution was 4.