中文摘要：

采用溶胶-凝胶法将多壁碳纳米管（MWCNT）和Bi VO4有效复合,制备出一系列不同掺杂量的异质结构复合光催化剂MWCNT/Bi VO4,通过X射线衍射（XRD）、扫描电镜（SEM）、傅里叶变换红外光谱（FT-IR）、X射线光电子能谱（XPS）等对催化剂进行表征分析,以罗丹明B为目标污染物,考察了光催化活性和稳定性。结果表明,合成的复合光催化剂均为单斜相晶体结构,MWCNT的引入没有改变Bi VO4的主体物相,两者充分接触、结合形成了复合结构;MWCNT较强的电子俘获能力和大的比表面积增加了复合材料表面的活性位点,MWCNT,Bi VO4存在于MWCNT-Bi VO4复合体系中且都保持各自化合态;综合分析,MWCNT/Bi VO4形成的复合结构为异质结构,异质结构具有典型的提高量子效率的特点,能够有效抑制电子-空穴再复合现象的发生。当MWCNT的含量为2%（质量分数）时,催化剂的效果最好,实验条件下光降解罗丹明B的去除率高达84.08%,五次重复性实验之后,MWCNT/Bi VO4的降解率仍在80%左右。

英文摘要：

A series of multi-walled carbon nanotube （MWCNT）/BiVO4 heterojunction composite photocatalysts were synthesized suc- cessfully 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 sur- face area of MWCNT that enhanced the active sites on the surface of the catalyst, also they maintained their own valence condition, meanwhile, MWCNT and BiV4. existed in the MWCNT-BiVO4 compound system; the composite structure was heterostructure, the en- hancing photocatalytic activity of MWCNT/BiVO4 was attributed to the efficient separation of electron-hole pairs derived from the het- erostructure 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.