摘要
采用水热法合成了微球状石墨烯/BiVO_4(Gr/BiVO_4)复合可见光光催化剂,以XRD、SEM、HRTEM、XPS及UV-vis漫反射技术对样品的晶相结构、微观形貌、组成和吸光性能等进行了表征分析。可见光照射下,Gr/BiVO_4样品对MB的降解性能均优于纯BiVO_4,当Gr含量为7.3%,可见光照射100 min时,对MB完全脱色,且重复使用6次后,依然具有较高的光催化活性。这是由于石墨烯与BiVO_4之间存在较强的相互作用,这种强的相互作用可加快BiVO_4粒子和石墨烯之间的电荷传输,有效抑制光生电子和空穴的复合。
Sphere-like Graphene/BiV0 4 photocatalysts were prepared with hydrothermal method. The photocatalysts were character-ized by XRD,SEM,HRTEM,XPS,UV-vis DRS techniques and photocatalytic degradation of MB. Results indicated that photocata-lytic activity of Gr/BiVO 4 was highly enhanced due to the introduction of Gr,The Gr/BiV04samples with proper content（7. 3% ） showed the highest photocatalytic activity for MB degradation among all the samples under visible light,and 99. 18% MB could be degraded within 100 min. The enhancement of photocatalytic activity was mainly attributed to the strong interaction between Gr and BiVO 4 , which could promote the transfer of charge carriers across interface and inhibit the recombination of charge carriers.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2017年第4期511-517,共7页
Chemical Research and Application
基金
陕西省教育厅科学研究基金项目(2013JK0690)资助
咸阳师范学院专项科研基金项目(14XSYK011)资助
咸阳师范学院(省级
校级)大学生创新创业训练计划项目(2105
2015017)资助
作者简介
联系人简介：马占营（1980-）,副教授,主要从事功能材料与光催化研究.E-mail：mazhanying@163.com
