MWCNT/BiVO4 heterojunction composites with highly enhanced photocatalytic activity and stability

被引：0

作者：

Wang Y. ^{[1
]}

Liu S. ^{[1
]}

Zhao D. ^{[1
]}

Zhao C. ^{[1
]}

Liu F. ^{[1
]}

Li S. ^{[1
]}

机构：

[1] College of Chemical Engineering, China University of Petroleum, Qingdao

来源：

| 1600年 / Editorial Office of Chinese Journal of Rare Metals卷 / 40期

关键词：

Heterojunction; Multi-walled carbon nanotube; MWCNT/BiVO[!sub]4[!/sub; Photocatalytic activity; Sol-gel method; Stability;

D O I：

10.13373/j.cnki.cjrm.XY15071001

中图分类号：

学科分类号：

摘要：

A series of multi-walled carbon nanotube (MWCNT)/BiVO4 heterojunction composite photocatalysts were synthesized successfully by sol-gel method. The structures and morphologies of the as-prepared samples were characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy(XPS), using RhB as the model pollutant, the photocatalytic activity and stability of MWCNT/BiVO4 photocatalyst were evaluated. The analyses indicated that MWCNT/BiVO4 photocatalysts were monoclinic phase, the phase of BiVO4 was not changed after introduction of MWCNT, and MWCNT nanoparticles were uniformly distributed on the surface of BiVO4; it was the good conductivity and surface area of MWCNT that enhanced the active sites on the surface of the catalyst, also they maintained their own valence condition, meanwhile, MWCNT and BiVO4 existed in the MWCNT-BiVO4 compound system; the composite structure was heterostructure, the enhancing photocatalytic activity of MWCNT/BiVO4 was attributed to the efficient separation of electron-hole pairs derived from the heterostructure which was formed by the matching band potentials between MWCNT and BiVO4. The photocatalytic activity and stability of the MWCNT/BiVO4 composites for photodegradation of RhB were efficient and much higher than that of the pure BiVO4 crystals. It was found that 2% (mass fraction) MWCNT/BiVO4 exhibited the highest photocatalytic degradation efficiency and had a better stability. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.

引用

页码：1233 / 1239

页数：6

共 39 条

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