Ag-rGO共掺杂对Bi_2WO_6微观结构与光催化脱氮性能的影响  

Effect of codoping Ag^+/rGO on the microstructures and photocatalysis denitrification activities of Bi_2WO_6

作　　者：高彦华[1] 

机构地区：[1]东北石油大学化学化工学院石油与天然气化工省重点实验室,黑龙江大庆163318

出　　处：《化工科技》2017年第1期7-12,共6页Science & Technology in Chemical Industry

基　　金：国家自然科学基金资助项目(50476091);黑龙江省科技攻关资助项目(11513009);大庆市科技局资助项目(sdft-2015-03)

摘　　要：为提高纳米材料Bi2WO6的光催化活性,采用改进的Hummers法制备了高比表面积的氧化石墨烯rGO,并通过一定量的Ag^+来提高光生电子的转移速率,成功制备了复合光催化材料AgrGO/Bi_2WO_6,通过XRD、SEM、BET等手段对所合成催化剂的形貌结构进行考察,并以罗丹明B为目标降解物对其脱氮效果进行评价。结果表明:Ag^+以及GO的加入影响了Bi_2WO_6二维纳米片的自组装,明显改变了催化剂的结构形貌、增大了催化剂的比表面积、抑制了光生电子的复合,从而提高了光催化性能。当光催化反应在500W氙灯光照时最佳反应条件为:x(石墨烯)=5%,x(Ag^+)=10%,m(催化剂)=0.05g,c(罗丹明B)=0.5×10^(-5) mol/L,V(H_2O_2)=3mL时最高降解率达99.5%,In order to improve the photocatalysis activities of nano-Bi2 WO6 ,Graphene（rGO）oxide with high specific surface area was prepared by modified Hummers method firstly.And then,nano-Bi2WO6 was modified by rGO and Ag＋ .The modified catalysts were characterized by XRD,SEM and BET.The denitrification activities of the catalysts were evaluated by choosing rhodamine B as the target corn pound.The results indicated that codoping of Ag＋/rGO has effects on the self-assembly of the cata- lysts,changes their microstructures, increases the specific surface area, inhibits the combination of photoelectrons.Therefore,the activities of the catalysts lamp is 500 W,under the mol/L of rhodamine B, 3 improve obviously.While the power of xenon optimal conditions, that is, 5 % concentration of rGO, 10 % of Ag＋ , 0.5 ×10^-5 mL of H2O2 and 0.05 g of the catalyst,the degradation rate is 99.5%.

关 键 词：氧化石墨烯 AG^+ 掺杂 钨酸铋 光催化脱氮 

分 类 号：TB383[一般工业技术—材料科学与工程]