【摘要】 采用水热合成与离子交换相结合的方法制备了羟基磷灰石负载氯化银(AgCl/HAP)光催化剂.利用扫描电子显微镜(SEM)、X-射线衍射仪(XRD)以及比表面积分析仪(BET)对AgCl/HAP的表面结构和形貌进行了表征.以高压汞灯为光源,研究了催化剂光催化降解酸性橙的性能.结果表明:AgCl能很好地分散于HAP上形成AgCl/HAP复合物,且AgCl的颗粒密度随Ag+负载量的增加而增大.HAP具有中孔结构且负载AgCl后孔径分布范围几乎不变.在紫外光照射条件下,相较于单一的AgCl,复合光催化剂AgCl/HAP对酸性橙的催化性能明显得到提高,其中AgCl/HAP-2对40 mg/L酸性橙的脱色率在120 min时可达84.3%.更多还原

【Abstract】 AgCl/hydroxyapatite(HAP) catalysts have been successfully synthesized by hydrothermal and ion-exchange methods.The surface structure and morphology of the AgCl/HAP were characterized by scanning electron microscope(SEM),X-ray diffraction(XRD) and Brunauer-Emmett-Teller(BET) apparatus.The photocatalytic activity of the catalysts for the degradation of acid orange was investigated under high pressure mercury lamp irradiation condition.The results suggested that AgCl particles were well dispersed on the hydroxyapatite support and AgCl nanoparticles density was larger for the higher Ag+loading sample.HAP owned mesopores structure and the pore size distributions in mesopores range remained nearly unchanged after silver impregnation.Under ultraviolet light irradiation,AgCl/HAP showed significantly higher photocatalytic activity compared to AgCl particles.The 40 mg/L acid orange decolorization rate on AgCl/HAP-2 were 84.3% at 120 min.更多还原