Kim Tae-Ho, Jo Yong-Hyun, Lee Soo-Wohn, Cho Sung-Hun, Kim Seung-Ho
J Nanosci Nanotechnol. 2015 Sep;15(9):7045-8. doi: 10.1166/jnn.2015.10522.
The effects of the preparation conditions of ZnO-modified TaON on the photocatalytic activity for degradation of rhodamine B dye (Rh. B) under simulated solar light were investigated. The ZnO/TaON nanocomposite were prepared by loading particulate Ta2O5 with ZnO using different ZnO contents, followed by thermal nitridation at 1123 K for 5 h under NH3 flow (20 ml min(-1)). The as-prepared samples were characterized by XRD, UV-Vis-DRS, and SEM-EDX. The results revealed that the band gap energy absorption edge of as prepared nanocomposite samples was shifted to a longer wavelength as compared to ZnO and Ta2O5, and the 60 wt% ZnO/TaON nanocomposite exhibited the highest percentage (99.2%) of degradation of Rh. B and the highest reaction rate constant (0.0137 min(-1)) in 4 h which could be attributed to the enhanced absorption of the ZnO/TaON nanocomposite photocatalyst. Hence, these results suggest that the ZnO/TaON nanocomposite exhibits enhanced photocatalytic activity for the degradation of rhodamine B under simulated solar light irradiation in comparison to the commercial ZnO, Ta2O5, and TaON.
研究了ZnO改性TaON的制备条件对模拟太阳光下降解罗丹明B染料（Rh.B）光催化活性的影响。通过用不同ZnO含量的ZnO负载颗粒状Ta2O5制备ZnO/TaON纳米复合材料，然后在NH3气流（20 ml min(-1)）下于1123 K热氮化5 h。采用XRD、UV-Vis-DRS和SEM-EDX对所制备的样品进行表征。结果表明，与ZnO和Ta2O5相比，所制备的纳米复合材料样品的带隙能量吸收边缘向更长波长移动，60 wt%的ZnO/TaON纳米复合材料在4 h内对Rh.B的降解率最高（99.2%），反应速率常数最高（0.0137 min(-1)），这可归因于ZnO/TaON纳米复合光催化剂吸收增强。因此，这些结果表明，与商用ZnO、Ta2O5和TaON相比，ZnO/TaON纳米复合材料在模拟太阳光照射下对罗丹明B的降解表现出增强的光催化活性。
