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Photocatalytic degradation of organic dye over bismuth vanadate–silicon dioxide–graphene oxide nanocomposite under visible light irradiation
Journal of the Australian Ceramic Society ( IF 1.8 ) Pub Date : 2020-05-11 , DOI: 10.1007/s41779-020-00470-4
Dang Trung Tri Trinh , Duangdao Channei , Kantapat Chansaenpak , Wilawan Khanitchaidecha , Auppatham Nakaruk

A novel bismuth vanadate–silicon dioxide–graphene oxide (BiVO4/SiO2/GO) nanocomposite was synthesized successfully by using hydrothermal method. The as-prepared nanocomposite was characterized by various techniques, including X-ray diffraction (XRD), field emission scanning electron microscope (SEM), and Brunauer–Emmett–Teller (BET). The photocatalytic activity of nanoparticles was evaluated by measuring the removal efficiency of methylene blue (MB) in aqueous solution under visible light irradiation. The results indicated that BiVO4, BiVO4/SiO2, and BiVO4/SiO2/GO exhibited the same diffraction peaks of monoclinic scheelite structure due to the higher content of BiVO4 in the nanocomposite system. The BiVO4 and BiVO4/SiO2 were uniformly agglomerated from irregular particles with the different level of aggregation and the size of several micrometers. In the meantime, BiVO4 and SiO2 particles were adhered firmly on the GO sheets in BiVO4/SiO2/GO nanocomposite. The BiVO4/SiO2/GO nanocomposite showed a much higher efficiency than the pure BiVO4 and the BiVO4/SiO2 hybrid material for MB removal efficiency due to the considerably increased specific surface area and pore size by the adhesion of BiVO4 and SiO2 on GO sheets.



中文翻译:

可见光照射下钒酸铋-二氧化硅-氧化石墨烯纳米复合材料对有机染料的光催化降解

采用水热法成功合成了新型钒酸铋-二氧化硅-氧化石墨烯(BiVO 4 / SiO 2 / GO)纳米复合材料。制备的纳米复合材料具有多种技术特征,包括X射线衍射(XRD),场发射扫描电子显微镜(SEM)和Brunauer-Emmett-Teller(BET)。通过在可见光照射下测量水溶液中亚甲基蓝(MB)的去除效率来评估纳米颗粒的光催化活性。结果表明,BiVO 4,BiVO 4 / SiO 2和BiVO 4 / SiO 2由于纳米复合体系中BiVO 4含量较高,/ GO表现出相同的单斜白钨矿结构衍射峰。BiVO 4和BiVO 4 / SiO 2从具有不同聚集程度和几微米大小的不规则颗粒均匀地团聚。同时,BiVO 4和SiO 2颗粒牢固地粘附在BiVO 4 / SiO 2 / GO纳米复合材料的GO片材上。与纯BiVO 4和BiVO 4 / SiO 2相比,BiVO 4 / SiO 2 / GO纳米复合材料的效率要高得多。BiVO 4和SiO 2在GO片材上的粘附,显着增加了比表面积和孔径,从而提高了MB去除效率。

更新日期:2020-05-11
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