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在微波辅助条件下采用离子交换和光致还原的方法将Ag@AgBr纳米粒子插层进入K4Nb6O17层间,制备了具有等离子体共振效应的可见光催化剂(记作K4Nb6O17/Ag@AgBr).在胺交换过程中采用不同链长的有机胺对酸交换产物进行柱撑,通过铌酸钾层间距的变化实现层间Ag@AgBr纳米粒子的形貌调控.利用XRD,SEM,EDX,UV-Vis等手段对复合催化剂进行结构、形貌和性质分析,并对复合光催化剂进行了可见光降解亚甲基蓝、甲基橙和苯酚的性能研究.结果表明:改性后的复合光催化剂在可见光区的响应大大增强;3种复合光催化剂对目标污染物均具有良好的可见光催化活性,其中十二胺柱撑的Ag@AgBr插层K4Nb6O17复合光催化剂对亚甲基蓝的移除效果最好.
Ag @ AgBr nanoparticles were intercalated into K4Nb6O17 layer by ion-exchange and photoreduction under microwave-assisted conditions to prepare a visible light catalyst (denoted as K4Nb6O17 / Ag @ AgBr) with a plasma resonance effect. During the amine exchange process In this paper, pillared acid exchange products were obtained by organic amines with different chain lengths, and the morphology of Ag @ AgBr nanoparticles was controlled by the change of the spacing of potassium niobate layers. XRD, SEM, EDX and UV-Vis The structure, morphology and properties of the composite photocatalyst were studied. The photocatalytic degradation of methylene blue, methyl orange and phenol were studied. The results showed that the composite photocatalyst showed a greatly enhanced response in visible light range. 3 The composite photocatalyst has good visible photocatalytic activity for the target pollutants. The dithiamine pillared Ag @ AgBr intercalation K4Nb6O17 composite photocatalyst has the best methylene blue removal efficiency.