中文摘要：

以Bi（NO3）3·5H2O为原料,乙二醇（ethylene glycol,EG）为溶剂,采用水解法,在不同沉淀剂（NH3·H2O,Na2CO3和CO（NH2）2）条件下制备了Bi OCl光催化剂。使用X射线衍射（XRD）、扫描电镜（SEM）、N2物理吸附、紫外可见漫反射（DRS）、光致发光（PL）光谱等手段对所制样品进行了表征。以甲基橙染料为降解物,评价了不同沉淀条件对Bi OCl光催化性能的影响。结果表明,不同沉淀条件对Bi OCl光催化剂的结晶度、晶粒尺寸、形貌、禁带宽度、光生电子空穴对分离效率有明显的影响,进而影响了其光催化活性。其中以尿素为沉淀剂制得的催化剂Bi OCl-3在模拟太阳光下降解甲基橙（MO）实验中显示了良好的光催化效率,光照60 min后对MO的降解效率达97%。Bi OCl-3较高的光催化活性是由于其具有较高的结晶度、均匀的片状结构、较窄的带隙（2.9 e V）和较高的光生电子-空穴对分离效率。自由基和空穴捕获实验证明,光生空穴是Bi OCl-3光催化反应体系中的主要活性物种。此外,所制备的Bi OCl-3光催化剂具有较高的光催化稳定性,重复使用4次后对甲基橙的降解率仍保持在89%以上。

英文摘要：

A series of BiOC1 photocatalysts were prepared with the material of Bi（ NO3 ）3 · 5H20 and ethylene glycol solvent using different precipitants （ NH3 · H20, Na2CO3 and CO （ NH2 ） 2 ） by a simple hydrolysis method. The obtained BiOC1 samples were characterized by powder X-ray diffraction （XRD） , scanning electron microscopy （SEM） , N2 physical adsorption, UV-Vis diffuse reflectance spectroscopy （DRS） and photolumineseence （PL） emission spectroscopy. The photocatalytie activity of the as- prepared samples were evaluated by photoeatalytic degradation of methyl orange. It was found that precipitants can influence the erystallinity, grain size, morphology, band gap and the separation of electron-hole pairs, which further determines their specific photocatalytic performances. The as- synthesized BiOC1-3 using urea as precipitant exhibits high photoeatalytic efficiency towards the degradation of methyl orange （MO） under simulated solar irradiation. MO is nearly completely eliminated with a photocatalytic degradation rate of 97% after 60 min irradiation. The enhanced photocatalytic activities could be attributed to the higher crystallinity, narrow band gap and separation of electron-holepairs. Radicals and holes the practical application of 89% for MO after ion trapping experiments show that h ＋ is inw）lved in the photoeatalytic process. For the obtained BiOC1-3 show good stability with a photoeatalytie degradation rate cycles.