BiOBr/CN的制备及光催化降解6-APA性能研究

Preparation of BiOBr/CN composite and study on its photocatalytic performance for degradation of 6-APA

通过原位生长法成功制备了BiOBr/CN复合光催化剂,利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)、红外光谱(FT-IR)和X射线能谱(XPS)等对所制备的催化剂的微观结构和形貌进行表征,通过在可见光照射下光催化降解罗丹明B(RhB)来评价催化剂的活性,并考察了其降解青霉素类抗生素母核6-APA的性能和机理。结果表明,可见光照射60 min时,BiOBr/CN对RhB的降解效率为84.52%;可见光照射120 min时,其对6-APA的降解效率为95.32%。根据活性物种捕获实验,·O_(2)^(-)和·OH是主要活性物种,h+和e-是次要活性物种。环境毒性实验结果表明,制备的催化剂为环境友好型催化剂。

BiOBr/CN composite catalyst is successfully prepared via a in situ growth method,and its microstructure and morphology are characterized by means of scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),and X-ray photoelectron spectroscopy(XPS).Its photocatalytic activity is evaluated through the degradation of Rhodamine B under the irradiation by visible light,and its performance and possible mechanism in degrading 6-APA are also studied.Results suggest that about 84.52%of RhB has been decomposed under visible light in 60 min,and about 95.32%of 6-APA has been decomposed in 120 min.It is found from active species capture experiment that·O_(2)^(-)and·OH are the major active species.Environmental toxicity test displays that the prepared catalyst is environmentally friendly.