| 毕先钧.微波助离子液体中锌和氮共掺杂TiO2催化剂的制备及微波强化光催化氧化活性[J].分子催化,2013,(6):566-574 |
| 微波助离子液体中锌和氮共掺杂TiO2催化剂的制备及微波强化光催化氧化活性 |
| Preparation of Zn and N co-doped nano-TiO2 photo-catalyst under microwave irradiation in ionic liquid and microwave strengthen photocatalytic oxidation activity |
| 投稿时间：2013-05-20 修订日期：2013-11-11 |
| DOI： |
| 中文关键词: 催化化学 离子液体 微波 锌-氮共掺杂二氧化钛 光催化降解 |
| 英文关键词:catalytic chemistry ionic liquid microwave Zinc-Nitrogen co-doping titanium |
| 基金项目:国家自然科学基金资助项目 |
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| 中文摘要: |
| 在1-丁基-3-甲基咪唑六氟磷酸盐（[Bmim]PF6）离子液体介质中，采用微波干燥的方法制备了锌和氮共掺杂的TiO2催化剂TiO2-Zn-N，分别采用IR、XRD、SEM、BET对催化剂结构进行了测试和表征。室温条件下，以甲基橙和苯酚溶液为模拟污染物，在微波超声波组合催化合成仪中，分别利用微波辐射（MW）、紫外光照（UV）、微波辐射-紫外光照（MW-UV）和太阳光照射（SL）等降解方式，着重考察了制备条件对TiO2-Zn-N光催化活性的影响。结果表明，在离子液体用量为5.6 mL、Zn掺杂量n(Zn)/n(Ti)=0.015:1、N掺杂量n(N)/n(Ti)=4:1、微波干燥功率350 W、微波干燥时间20 min、煅烧温度700 ℃、煅烧时间2 h的条件下所制得的TiO2-Zn-N催化剂具有较高的光催化活性；在MW、UV、MW-UV和SL四种降解条件下，TiO2-Zn-N对甲基橙的降解率分别为29.6%、95.4%、99.2%和79.2%；并且在前三种降解条件下，甲基橙降解率始终是：MW-UV> UV> MW。这表明在紫外光照条件下，微波辅射具有强化催化剂降解甲基橙的作用。 |
| 英文摘要: |
| Zn and N co-doped TiO2 photo-catalysts were prepared by microwave drying method in ionic liquid 1-butyl-3 methylimidazolium hexafluorophosphate. The IR、XRD、BET and SEM were used to characterize the structure of the catalysts. At a constant temperature (25 ℃) , microwave irradiation (MW), ultraviolet lamp light (UV), microwave irradiation ultraviolet lamp light (MW-UV) and sun light (SL) used respectively for degradation of methyl orange and phenol, the influences of the preparing condition on the photo-catalytic activity of TiO2-Zn-N catalyst were investigated by the combination of catalytic synthesis of microwave ultrasonic instrument. The results indicated that the best preparing condition of TiO2-Zn-N catalyst which exhibited higher photo-catalytic activity was as follows: ionic liquid dosage 5.6 mL, n(Zn)/n(Ti)= 0.015:1, n(N)/n(Ti)=4:1, dried in microwave with the power of 350 W for 20 min and calcined at 700 ℃ for 2 h. When the catalyst used to degrade methyl orange, the degradation rate of methyl orange under MW, UV, MW-UV and SL were respectively 29.6%, 95.4%, 99.2% and 79.2%. And more the degradation rate of methyl orange with MW-UV was all along the highest under MW, UV and MW-UV conditions, which indicated the microwave irradiation had the strengthening effect for degradation of methyl orange when TiO2-Zn-N used as the photo-catalyst. |
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