钆掺杂铌酸钾的制备及其光催化降解罗丹明性能

以氢氧化钾、氧化铌和硝酸钆为原料，采用水热法合成了结晶度高、掺杂不同含量的稀土元素钆的K4Nb6O17光催化剂纳米片。借助XRD、SEM、TEM和XPS等手段对其结构和形貌做了表征，考察了钆掺杂铌酸钾复合材料对有机染料罗丹明的降解性能。结果表明，钆的掺杂提高了铌酸钾的结晶度，钆掺杂量为0.5%（物质的量分数）的铌酸钾具有最佳的光催化活性，30 mg催化剂可对质量浓度为20 mg/L的罗丹明溶液（100 mL）快速降解。

Hydrothermal synthesis of Gd-doped potassium niobate and its photocatalytic activity to rhodamine degradation

 Gd doped nano-flake K4Nb6O17 photocatalysts with high crystallinity were prepared by using KOH，Nb2O5，and Gd（NO3）3 as raw materials under hydrothermal conditions.The morphology and structure of the prepared photo-catalysts were characterized by XRD，SEM，TEM，snd XPS etc..The degradation performance to rhodamine was also investigated.Results showed that the doping of Gd increased the crystallinity of K4Nb6O17.The catalyst with a doping content of Gd of 0.5%（amount-of-substance fraction） had the best performance for rhodamine degradation.Under the radiation of ultraviolet lamp，30 mg of catalyst could effectively degraded 100 mL of rhodamine with a mass concentration of 20 mg/L.