采用两步法制备生物质石墨烯/LaFeO3纳米复合材料(石墨烯加入量分别为LaFeO3的1%、3%、5%、7%), 应用差热-热重分析、X射线衍射(XRD)、扫描电子 显微镜(SEM)等测试手段对生物质石墨烯/LaFeO3纳米复合材料样品的物相及微观结构进行了表征; 采用傅里叶变换红外光谱仪对样品进行了红外分析(FTIR); 研究了生物质石墨烯加入量对生物质石墨烯/LaFeO3复合材料降解亚甲基蓝光催化降解率的影响。结果表明: 通过两步法所制备的生物质石墨烯/LaFeO3纳米光 催化剂稳定性好, 具有高效光催化活性; 生物质石墨烯的加入提高了LaFeO3对亚甲基蓝的光催化降解率; 采用175 W荧光高压汞灯光照30 min时, 加入7%生物 质石墨烯的LaFeO3样品对亚甲基蓝的光催化降解率最高达到56%, 比纯LaFeO3光催化降解率高出50%。

Biomass graphene/LaFeO3 nanocomposites (graphene doping amount is 1%, 3%, 5% and 7% of LaFeO3) were prepared by two-step method. In order to obtain phase and microtopography, the biomass graphene/LaFeO3 nanocomposites were characterized by DTA-TG, XRD and SEM. Infrared analysis of samples was carried out by Fourier transform infrared spectrometer (FTIR). Effect of addition amount of the biomass graphene for the graphene/LaFeO3 nanocomposites on the photocatalytic activity in the methylene blue were studied. The results show that the biomass graphene/LaFeO3 nanophotocatalysts by two-step method have good stability and high efficiency photocatalytic activity. Addition of biomass graphene has improved photodegradation rate of LaFeO3 on the methylene blue. The optimal doping amount of the graphene is 7% and the photodegradation rate irradiated for 30 min reaches 56% under 175 W high pressure mercury lamp, which is 50% higher than LaFeO3 as the catalyst.