g-C3N4/CaTi2O5复合材料制备及其光催化性能
C3N4/CaTi2O5 Composite:Synthesis and Photocatalytic Properties
作者单位E-mail
董伟霞 景德镇陶瓷大学材料科学与工程学院, 景德镇 333403 weixia_dong@sina.com 
包启富 景德镇陶瓷大学材料科学与工程学院, 景德镇 333403  
顾幸勇 景德镇陶瓷大学材料科学与工程学院, 景德镇 333403  
彭刚 景德镇陶瓷大学材料科学与工程学院, 景德镇 333403  
赵学国 景德镇陶瓷大学材料科学与工程学院, 景德镇 333403  
摘要: 利用类石墨氮化碳(g-C3N4)和亚稳相钙钛氧化物(CaTi2O5)固相法制备C3N4/CaTi2O5复合材料。利用X射线衍射(XRD)、金相显微镜、扫描电子显微镜(SEM)及附带能谱分析仪(EDS)和N2吸附-脱附对样品的显微结构和比表面积进行检测分析,并用紫外-可见吸收光度计(UV-Vis)测试了样品的光吸收性能,研究C3N4与CaTi2O5物质的量之比(nC3N4/nCaTi2O5)对C3N4/CaTi2O5复合样品的物相结构和微观形貌的影响,同时考察C3N4/CaTi2O5复合样品在可见光照射下光催化降解罗丹明染料效果。实验结果表明:相比纯C3N4和CaTi2O5样品,C3N4/CaTi2O5复合样品在可见光下具有较高的光催化性能,随着nC3N4/nCaTi2O5增加,样品的光催化降解率随之增加而后降低,当nC3N4/nCaTi2O5=1:1时,样品的光催化降解率达到最大值99.5%,并且循环重复利用5次后,样品的光催化剂降解率仍几乎保持不变。复合样品光催化性能提高主要归因于复合能级结构有效地抑制了电子和空穴复合所致
关键词: g-C3N4  C3N4/CaTi2O5/CaTi2O5复合材料  光催化
基金项目: 国家自然科学基金(No.51502119)、江西省重大自然科学基金(No.20152ACB21022)、江西省科技合作领域重点项目(No.20161BBH80048)和江西省教育厅(No.GJJ14629)资助。
Abstract: C3N4/CaTi2O5 composite was prepared by a solid reaction method. The microstructure and surface area of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM)and the corresponding energy dispersive analysis (EDS),and N2 adsorption-desorption. The absorption properties of the samples were analyzed by ultraviolet-visible absorption spectrophotometer (UV-Vis). Effects of nC3N4/nCaTi2O5 on phase and microstructure of the samples were studied. The photocatalytic degradation activity of C3N4/CaTi2O5 composite for rhodamine B (RhB)were examined under visible light irradiation. The experimental results showed that the composites exhibited higher photocatalytic activity than pure C3N4 or CaTi2O5. The photocatalytic activity of the composites increased then decreased with increasing C3N4/CaTi2O5 content, and the composite with nC3N4/nCaTi2O5 of 1 exhibited the highest photocatalytic activity of 99.5%. The enhanced photocatalytic activity of the C3N4/CaTi2O5 photocatalyst was attributed predominantly to the efficient separation of photo induced electrons and holes. After 5 cycles of degradation,the C3N4/CaTi2O5 photocatalyst kept almost unchanged,which indicated excellent stability and reusability.
Keywords: C3N4(graphite-like carbon nitride)  CaTi2O5  C3N4/CaTi2O5 composites  photocatalytic properties
投稿时间:2016-08-25 修订日期:2016-12-05
摘要点击次数:  2031
全文下载次数:  1554
董伟霞,包启富,顾幸勇,彭刚,赵学国.g-C3N4/CaTi2O5复合材料制备及其光催化性能[J].无机化学学报,2017,33(2):292-298.
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