摘要
以甲基橙的光催化降解效率为指标,采用超声浸滞法制备了N掺杂TiO2纳米管阵列(N-TNTs)。结果显示,将TiO2纳米管阵列(TNTs)浸入0.02mol·L-1尿素溶液中,超声浸泡6min,干燥后在400℃下煅烧2h可获得N-TNTs。SEM和XRD表征结果显示,TNTs与N-TNTs形貌相似,管径均约为125nm,且锐钛矿相和金红石相相混,在2θ为35°(100)处观察到TiN0.26的衍射峰。pH=1、光照时间为4h时,N-TNTs对甲基橙的降解率达93.9%。同时,甲基橙初始浓度越低,甲基橙降解率越高。且N-TNTs光催化降解甲基橙的反应过程为拟一级动力学过程。将N-TNTs应用于光催化降解制糖废水时发现,在强碱性环境中,N-TNTs对制糖废水的降解率最高,光照25h降解率达到87.71%。
When photocatalytic degradation efficiency of methyl orange was used as index, N doped TiO2 nanotube arrays（N-TNTs）were fabricated via ultrasonic immersion hysteresis method in 0.02mol· L^-1 urea solution under ultrason ic treatment for 6min,after dried and then calcined for 2b at 400℃. Results of SEM and XRD showed that the morphology of TNTs and N TNTs were similar. Their pipe diameter was about 125nm. Anatase mixed with ruffle in N-TNTs. The diffraction peak of TiN0.26 was observed in the 20 for 35°（100）. Degradation ratio of methyl orange with pH= 1 was 93.9 % on N-TNTs after irradiation time for 4h. At the same time,the lower initial concentration of methyl orange was,the higher the degradation ratio will be. The reaction process of photocatalytic degradation of methyl orange on N-TNTs was quasi first order kinetics process. When N-TNTs were applied to photocatalytic degradation of sugar wastewater, the highest photocat- alytic degradation ratio of sugar wastewater was 87.71% in strong alkali environment after irradiation time for 25h was found.
出处
《化工新型材料》
CAS
CSCD
北大核心
2014年第7期156-158,162,共4页
New Chemical Materials
基金
国家自然科学基金项目(61264007)
广西科学研究与技术开发计划课题(桂科重1298002-3)
