RGO/MoS_2复合光催化材料的制备及其在可见光照射下对RhB的光催化降解性能
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摘要
为提高二硫化钼(MoS_2)材料的光催化性能,文中利用水热路线,成功制备了RGO/MoS_2复合光催化材料,并分别通过XRD,XPS,SEM,UV-Vis DRS和PL对复合材料进行了物相、组分、形貌和光学特性表征,研究了不同质量分数的RGO(2.5%,5%,7.5%,10%)对光降解活性的影响。实验结果表明,RGO/MoS_2复合材料对罗丹明B(RhB)染料的光降解效率明显高于纯MoS_2纳米花球,其中7.5%(质量分数)RGO负载量获得了最佳的降解效果,5次循环光降解实验进一步表明,RGO/MoS_2复合光催化剂仍能保持90%以上的降解效率。
In order to improve the photo-catalytic performance of MoS_2,RGO/MoS_2 composite photo-catalyst was synthesized by a hydrothermal method.The structure,components,morphology,and optical performance of as-prepared samples were respectively characterized by XRD,XPS,SEM,UV-Vis DRS and PL.Compared with pristine MoS_2 and RGO/MoS_2,the results show that RGO/MoS_2 photo-catalysts possess higher photo-catalytic efficiency for the removal of RhB.For the RGO/MoS_2 composite semiconductor,the effect of RGO loading content(2.5%,5.0%,7.5%,and 10%)on the photo-catalytic degradation of Rh B was investigated.The results show that 7.5%wt RGO/MoS_2 obtained the best photo-catalytic performance.After five cycles of stability test,RGO/MoS_2 compositecan maintain a high degradation rate of 90%.
In order to improve the photo-catalytic performance of MoS_2,RGO/MoS_2 composite photo-catalyst was synthesized by a hydrothermal method.The structure,components,morphology,and optical performance of as-prepared samples were respectively characterized by XRD,XPS,SEM,UV-Vis DRS and PL.Compared with pristine MoS_2 and RGO/MoS_2,the results show that RGO/MoS_2 photo-catalysts possess higher photo-catalytic efficiency for the removal of RhB.For the RGO/MoS_2 composite semiconductor,the effect of RGO loading content(2.5%,5.0%,7.5%,and 10%)on the photo-catalytic degradation of Rh B was investigated.The results show that 7.5%wt RGO/MoS_2 obtained the best photo-catalytic performance.After five cycles of stability test,RGO/MoS_2 compositecan maintain a high degradation rate of 90%.
引文
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[5]LIN J,LUO Z,LIU J,et al.Photocatalytic degradation of methylene blue in aqueous solution by using Zn O-SnO2nanocomposites[J].Materials Science in Semiconductor Processing,2018,87:24-31.
[6]WANG T,LIU X,MEN Q,et al.Green synthesis gC3N4quantum dots loading h-BN for efficient and stable photocatalytic performance[J].Journal of Molecular Liquids,2018,268:561-568.
[7]XU Y,ZHANG L,YIN M,et al.Ultrathin g-C3N4films supported on attapulgite nanofibers with enhanced photocatalytic performance[J].Applied Surface Science,2018,440:170-176.
[8]ZHANG X,SUO H,ZHANG R,et al.Photocatalytic activity of 3D flower-like MoS2hemispheres[J].Materials Research Bulletin,2018,100:249-253.
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[10]WILCOXON T R,TA J P.Photooxidation of organic chemicals catalyzed by nanoscale MoS2[J].J Phys Chem B,1999,103:11-17.
[11]ZHOU Z,LIN Y,ZHANG P,et al.Hydrothermal fabrication of porous MoS2and its visible light photocatalytic properties[J].Materials Letters,2014,131:122-124.
[12]YAN Y,XIA B,GE X,et al.Ultrathin MoS2nanoplates with rich active sites as highly efficient catalyst for hydrogen evolution[J].ACS Applied Materials&Interfaces,2013,5(24):12794-12798.
[13]KATHIRAVA D,HUANG B R,SARAVANAN A,et al.Highly enhanced hydrogen sensing properties of sericin-induced exfoliated MoS2nanosheets at room temperature[J].Sensors and Actuators B:Chemical,2019,279:138-147.
[14]YAN Y,XIA B,GE X,et al.Ultrathin MoS2nanoplates with rich active sites as highly efficient catalyst for hydrogen evolution[J].ACS Applied Materials&Interfaces,2013,5(24):12794-12798.
[15]SADAK O,SUNDRAMOORTHY A K,GUNASEKA-RAN S.Facile and green synthesis of highly conducting graphene paper[J].Carbon,2018,138:108-117.
[16]HUANG H,HUANG J,LIU W,et al.Ultradispersed and single-layered MoS2nanoflakes strongly coupled with graphene:An optimized structure with high kinetics for the hydrogen evolution reaction[J].ACS Appl Mater Interfaces,2017,9:39380-39390.