摘要
以十六烷基三甲基溴化铵(CTAB)为表面活性剂,正丁醇为助表面活性剂,环己烷为油相,采用微乳液法制备出Fe3+掺杂纳米TiO2,用X-射线衍射(XRD)对纳米TiO2粒径、物相等方面进行了表征。通过光催化降解甲基橙溶液考察了TiO2的光催化性能。甲基橙降解实验结果表明,溶液的pH=2时降解率可达100%;掺杂Fe3+会影响TiO2光催化性能,n(Ti4+)∶n(Fe3+)=1∶0.000 4的TiO2在前10 min降解率高达54.50%,60 min降解率可达93.33%,掺杂浓度增大到一定程度后,降解率反而下降,说明存在较佳掺杂浓度。另外,溶液初始浓度对TiO2光催化性能有一定的影响。
Photo- catalyst composed of nano- sized TiO2 doped with Fe^3+ was prepared by microemulsion method using cetyhrimethylammonium bromide as surfactant,n - butanol as co - surfactant and cyclohexane as oil phase. The particle of TiO2 and the phase structure were identified by X - ray diffraction. Photo - catalytic performance of the catalyst was examined by the photo - catalytic degradation of methyl orange solution. Laboratory results showed that under condition of pH = 2, the degradation can achieve 100%. The doping of Fe^3 + will affect the photo - catalytic performance. Under condition of n ( Ti^4+ ) : n ( Fe^3+) = 1 : 0. 000 4, the degradation after 10 min achieves 54.50% ,and the degradation after 60 rain achieves 93.33%. However, the degradation declines when the doping concentration increases to a certain extent. It indicates that there is an optimum doping concentration. Besides,the initial concentration of methyl orange solution has a certain effect on the catalytic performance.
出处
《日用化学工业》
CAS
CSCD
北大核心
2009年第1期32-34,42,共4页
China Surfactant Detergent & Cosmetics
基金
河南省高校杰出科研人才创新工程资助项目(2004KYCX010)
郑州市科技攻关项目(074SCCG23109-6)
关键词
阳离子表面活性剂
微乳液法
纳米TIO2
光催化活性
cationic surfactant
microemulsion method
nano - sized titanium dioxide
photo - catalytic activity