氢氧根调制氯氧化铋的表面结构及光催化活性

Surface Structure and Photocatalytic Activity of BiO Cl Modulated by Hydroxyl

使用NaOH溶液处理BiOCl合成了BiOCl/Bi_2O_3复合材料,并对其光催化性能进行了研究。分别用X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外可见(UV-vis)吸收光谱、阻抗谱(IS)和光致发光(PL)光谱表征样品。以BiOCl/Bi_2O_3复合材料为催化剂,以氙灯为光源,对罗丹明B(RhB)溶液进行了光催化降解试验。研究结果表明:BiOCl/Bi_2O_3复合材料在350～500 nm有较强的吸收能力,其微观形貌由片状结构和棒状结构组成,有较快的电子转移速度和较低的PL强度。当NaOH溶液的浓度为10.00 mol/L时,35/65 Bi OCl/Bi_2O_3复合材料对RhB的降解率在光照50 min后为67.3%。

BiOCl/Bi2O3 composites were synthesized by the treatment of BiOCl with NaOH solution and its photocatalytic properties were studied.The samples were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),ultraviolet-visible(UV-vis)absorption spectroscopy,impedance spectroscopy(IS)and photoluminescence(PL)spectroscopy.The photocatalytic degradation of rhodamine B(Rh B)solution over BiOCl/Bi2O3 composite was studied by using high pressure xenon lamp as light source.The result shows that the BiOCl/Bi2O3 composite has strong obsorption in 350~500 nm.The composite has the micro morphology of lamellar-rod structure,the faster electron transfer rate and lower PL strength.When the concentration of NaOH solution is 10.00 mol/L,the degradation rate of Rh B photocatalyzed by 35/65 BiOCl/Bi2O3 composite is 67.3%at 50 min.