摘要
采用回流法合成了BiPO4纳米棒光催化剂,探讨了反应时间、反应物比例、pH值和反应物浓度对BiPO4晶相结构和形貌尺寸的影响,利用粉末X射线衍射(XRD)、透射电镜(TEM)、比表面积分析(BET)和紫外-可见漫反射光谱(UV-VisDRS)等对产物进行了表征,以亚甲基蓝(MB)为探针研究了其光催化活性.反应时间和反应物浓度对产物的形貌尺寸影响较大,反应物比例和pH值对产物晶相结构和形貌尺寸均有较大的影响,进一步影响BiPO4光催化剂的活性.调控各种因素后可合成出具有单斜相独居石/六方相混晶结构的高紫外光活性BiPO4纳米棒光催化剂.
BiPO 4 nanorods were synthesized by reflux,and the effect of reaction time,reactant ratio and concentration,and pH value on BiPO4 crystal structure and morphology was investigated.Nanorods were characterized by X-ray diffraction （XRD）,transmission electron microscopy （TEM）,specific surface area analysis （BET）,and UV-Vis diffuse reflectance spectroscopy （UV-Vis DRS）.The ability of BiPO4 to photo-degrade methylene blue （MB） was investigated.The reaction time and reactant concentration influenced the product morphology.The reactant ratio and pH value had a large effect on the product crystal structure and morphology,and also on the photo-activity of BiPO4.Highly UV active BiPO4 nanorods of monoclinic monazite/hexagonal mixed crystal structure suitable for photocatalysis could be prepared by carefully controlling the above conditions.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2013年第3期576-584,共9页
Acta Physico-Chimica Sinica
基金
国家自然科学基金(20925725
50972070)
科技部创新方法工作专项及清华大学自主科研计划资助项目~~
关键词
回流
可控合成
BiPO4
混晶结构
光催化
Refluxing method
Controllable synthesis
Bismuth phosphate
Mixed crystal structure
Photocatalysis
