AgCl／BiOCl片组装纳米花球的合成及光催化性能研究

Synthesis of Nanoplate-assembled AgCl/BiOCl Microflowers and Their Photocatalytic Properties

以硝酸铋(Bi(NO_3)_3·5H_2O)、硝酸银(AgNO_3)、氯化钾(KCl)为原料,通过无模板、无加热、无表面活性剂的绿色化学方法制备了BiOCl片组装纳米花球,并在它的基础上采用浸渍法负载AgCl实现了对它的改性。以罗丹明B(RhB)和甲基橙(MO)为光催化反应降解模型,进行了光催化活性测试,考察了不同浸渍次数的AgCl对BiOCl光催化剂反应活性和稳定性的影响。用XRD、SEM、EDS、UV-Vis吸收光谱等手段对其结构、形貌、光谱吸收性能等进行了表征。研究表明,AgCl改性的BiOCl复合光催化剂的光催化性能明显优于纯BiOCl,当浸渍2遍时,光催化降解RhB活性最佳,当浸渍5遍时,光催化降解MO活性最佳。

Using Bi（NO3）3 · 5H2 O, AgNO3 and KCl as materials, a flowerlike hierarchitectures of BiOC1 was successfully synthesized by a template, heat and surfactant-free solution method. Then AgCl was deposited into it by an impregnating-precipitation method, and the influence of photocatalytic activity of the AgCl was researched. The photocatalytic activity of the prepared catalysts was evaluated by photocatalytic degradation of RhB and MO. The construction, morphology and spectral absorption properties of the prepared samples were characterized by X-ray diffraction （XRD）, scanning electron microscope （SEM）, energy disperse X-ray spectroscopy （EDS） and UV-visible ectrophotometer, respectively. Results showed that the photocatalytic activity and stability of the BLOCl/AgCl photocatalysts is much better than that of pure BLOCl. When BLOCl was immersed for 2 cycles, it has the best photocatalytic activity towards RhB, and when BiOCl was immersed for 5 cycles, it has the best photocatalytic activity towards MO.