文章摘要
构建MoS2/Fe-g-C3N4异质结催化剂以促进其可见光催化产氢性能
Rationally designed MoS2/Fe-g-C3N4 heterojunction composites as photocata-lysts to enhance hydrogen evolution via water splitting under visible light ir-radiation
投稿时间:2019-04-09  修订日期:2019-06-11
DOI:
中文关键词: MoS2/Fe-g-C3N4  光催化产氢  异质结结构  多孔结构  可见光
英文关键词: MoS2/Fe-g-C3N4  Hydrogen evolution  Heterojunction structure  Porous structure  Visible light.
基金项目:国家自然科学基金(21706218);陕西省教育厅专项科研计划(18Jk1205);西京学院高层次人才启动项目(XJ17B02)
作者单位E-mail
田少鹏 西京学院  
王鹏 徐州工程学院  
任花萍 西京学院  
苗宗成 西京学院 miaozongcheng@xijing.edu.cn 
朱敏 西京学院  
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中文摘要:
      以g-C3N4为基底,通过掺杂铁(Fe)元素,复合MoS2的方法制备了具有多孔异质结结构的MoS2/Fe-g-C3N4半导体材料,并测量其光解水产氢性能,发现MoS2质量分数为3% 时,样品MoS2/Fe-g-C3N4的光催化性能优异、热稳定性好,其产氢速率达到48.2 μmol/h,为g-C3N4的5.47倍。利用XRD、FTIR、SEM、TEM、XPS表征了催化剂的物化性质;利用PL、UV-vis等方法表征了催化剂的光学性质。结果发现,Fe元素的掺杂使g-C3N4结晶度降低,并呈现一种交叉孔道结构,极大增加了催化剂的比表面积。同时,MoS2可以与g-C3N4形成异质结结构,提高了MoS2/Fe-g-C3N4的可见光吸收率以及光生电子-空穴对的分离效率,从而有效提高了MoS2/Fe-g-C3N4光解水产氢的能力。
英文摘要:
      A series of porous MoS2/Fe-g-C3N4 heterojunction composites were fabricated and their photocatalytic performance for hydrogen evolution via water splitting under visible light irradiation were measured. The 3% MoS2/Fe-g-C3N4 showed excellent photocatalytic performance and recyclability, and the rate of hy-drogen production reached to 48.2 μmol?/h which is 5.47 times of pure g-C3N4. The physicochemical properties of materials were also investigated by XRD, FTIR, SEM, TEM and XPS and the optical proper-ties were tested by PL and UV-vis. The results showed that the crystallinity of Fe-g-C3N4 decreased greatly and the Fe doped materials presented a porous structure with larger specific surface area. Furthermore, the MoS2/Fe-g-C3N4 materials showed more visible light absorption and faster electron-hole separation which was mainly because the newly-formed heterojunction.
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