当前位置:
X-MOL 学术
›
J. Phys. Chem. C
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Visible Light Driven ZnMoO4/BiFeWO6/rGO Z-Scheme Photocatalyst for the Degradation of Anthraquinonic Dye
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2019-08-13 , DOI: 10.1021/acs.jpcc.9b05008
Potlako J. Mafa 1 , Bulelwa Ntsendwana 1 , Bhekie B. Mamba 1 , Alex T. Kuvarega 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2019-08-13 , DOI: 10.1021/acs.jpcc.9b05008
Potlako J. Mafa 1 , Bulelwa Ntsendwana 1 , Bhekie B. Mamba 1 , Alex T. Kuvarega 1
Affiliation
![]() |
The Z-scheme zinc molybdate/bismuth iron tungstate/reduced graphene oxide (ZnMoO4/BiFeWO6/rGO, ZM/BFW/rGO) ternary composite photocatalyst was prepared with rGO acting as an electron transmission mediator. The physicochemical properties of the materials were characterized by using a range of techniques such as SEM, TEM, EDS, FTIR, Raman, BET, TGA, and UV–vis DRS. The optical properties of the materials showed that ZM/BFW/rGO absorbed more visible light than the pristine ZnMoO4 (ZM) and BiFeWO6 (BFW). Thermal analysis showed enhanced stability of the ternary composite due to incorporation of thermally stable ZM. The composite material was used for photocatalytic degradation of 30 mg L–1 anthraquinonic acid blue 25 (AB 25) as the model pollutant under visible light irradiation. A degradation efficiency of 98% was achieved after 180 min degradation using ZM/BFW/rGO, while ZM and BFW showed only 24% and 36% dye removal efficiencies. About 70% total organic carbo (TOC) was attained with a ternary composite photocatalyst. The enhanced degradation was attributed to the formation of a Z-scheme between the two catalysts, visible light absorption, and the presence of high rGO that aided in electron mediation and shuttling. The photocatalyst also showed high stability with 89% removal efficiency after four cycles of repeated usage. The results of this work provide an alternative method for effective removal of dyes from wastewater and may be explored for large-scale application in the future.
中文翻译:
可见光驱动ZnMoO4 / BiFeWO6 / rGO Z-方案光催化降解蒽醌染料
以rGO为电子传递介质,制备了Z-方案钼酸锌/钨酸铋铁/还原氧化石墨烯(ZnMoO 4 / BiFeWO 6 / rGO ,ZM / BFW / rGO)三元复合光催化剂。材料的理化特性通过使用一系列技术来表征,例如SEM,TEM,EDS,FTIR,拉曼,BET,TGA和UV-vis DRS。材料的光学性能表明,ZM / BFW / rGO比原始的ZnMoO 4(ZM)和BiFeWO 6(BFW)吸收更多的可见光。热分析表明,由于掺入了热稳定的ZM,三元复合材料的稳定性得到了增强。该复合材料用于光催化降解30 mg L –1可见光照射下以蒽醌酸蓝25(AB 25)为模型污染物。使用ZM / BFW / rGO降解180分钟后,降解效率达到98%,而ZM和BFW仅显示24%和36%的染料去除效率。三元复合光催化剂可达到约70%的总有机碳(TOC)。降解的增强归因于两种催化剂之间形成的Z方案,可见光吸收以及有助于电子介导和穿梭的高rGO的存在。在重复使用四个循环后,该光催化剂还显示出高稳定性,去除效率为89%。这项工作的结果为有效去除废水中的染料提供了另一种方法,将来可能会被探索用于大规模应用。
更新日期:2019-08-13
中文翻译:

可见光驱动ZnMoO4 / BiFeWO6 / rGO Z-方案光催化降解蒽醌染料
以rGO为电子传递介质,制备了Z-方案钼酸锌/钨酸铋铁/还原氧化石墨烯(ZnMoO 4 / BiFeWO 6 / rGO ,ZM / BFW / rGO)三元复合光催化剂。材料的理化特性通过使用一系列技术来表征,例如SEM,TEM,EDS,FTIR,拉曼,BET,TGA和UV-vis DRS。材料的光学性能表明,ZM / BFW / rGO比原始的ZnMoO 4(ZM)和BiFeWO 6(BFW)吸收更多的可见光。热分析表明,由于掺入了热稳定的ZM,三元复合材料的稳定性得到了增强。该复合材料用于光催化降解30 mg L –1可见光照射下以蒽醌酸蓝25(AB 25)为模型污染物。使用ZM / BFW / rGO降解180分钟后,降解效率达到98%,而ZM和BFW仅显示24%和36%的染料去除效率。三元复合光催化剂可达到约70%的总有机碳(TOC)。降解的增强归因于两种催化剂之间形成的Z方案,可见光吸收以及有助于电子介导和穿梭的高rGO的存在。在重复使用四个循环后,该光催化剂还显示出高稳定性,去除效率为89%。这项工作的结果为有效去除废水中的染料提供了另一种方法,将来可能会被探索用于大规模应用。