B,N-SnO_(2)/TiO_(2)光催化剂的制备及其光催化性能研究  

Preparation and Photocatalytic Performance of B,N-SnO_(2)/TiO_(2) Photocatalyst

作　　者：马智烨 叶丽[1] 吴雨桓 赵彤[1,2] Zhiye Ma;Li Ye;Yuhuan Wu;Tong Zhao(Key Laboratory of Science and Technology on High-tech Polymer Materials,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China;School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院化学研究所极端环境高分子材料重点实验室,北京100190 [2]中国科学院大学化学科学学院,北京100049

出　　处：《化学学报》2021年第9期1173-1179,共7页Acta Chimica Sinica

基　　金：国家自然科学基金(No.21604090)资助。

摘　　要：为了提高TiO_(2)在可见光下的光催化活性,采用聚合物前驱体法制备了B,N共掺杂的SnO_(2)/TiO_(2)(B,N-SnO_(2)/TiO_(2))粉体型光催化剂.进一步为了提高光催化剂的实用性,通过浸渍-裂解法制备了氧化铝纤维毡负载的B,N-SnO_(2)/TiO_(2)光催化剂.利用X射线衍射仪、场发射扫描电子显微镜、场发射透射电子显微镜、X射线光电子能谱、比表面积分析仪、紫外-可见分光光度计等对其进行了表征.以氧氟沙星水溶液为模拟污染物,考察了B,N-SnO_(2)/TiO_(2)粉体型光催化剂和负载型光催化剂的可见光催化活性及稳定性.结果表明,该粉体型光催化剂在可见光下光照15min,对氧氟沙星的降解率可达98.3%.负载型光催化剂也表现出了良好的光催化性能及可重复性和稳定性,在21次重复使用后光催化性能几乎不发生变化.In order to improve the photocatalytic activity of TiO_(2) under visible light, B,N-codoped Sn O_(2)/TiO_(2)(B,N-Sn O_(2)/TiO_(2)) powder photocatalysts were prepared by polymer precursor method, and to further improve the practicability of B,N-SnO_(2)/TiO_(2) photocatalyst, alumina fabrics immobilized B,N-SnO_(2)/TiO_(2) catalyst was prepared by precursor impregnation and pyrolysis method. The typical experimental procedure for synthesis of B,N-SnO_(2)/TiO_(2) powder photocatalysts is as follows: First, tetrapropylorthotitanate(TNPT) was mixed with PEG-600 and Sn(OPr)4 under magnetic stirring and refluxed for 2 h. Then boric acid was added. Acetamide and acetylacetone were added to the system after boric acid was dissolved completely. Finally, a mixture of deionized water and n-propanol were added dropwise. The whole solution were reflux for 1 h and then the B,N-SnO_(2)/TiO_(2) precursor was obtained by rotary evaporation method. The precursor was placed in a quartz tube furnace and calcined at a heating rate of 3 ℃/min to 450 ℃ for 30 min to obtain B,N-SnO_(2)/TiO_(2) powder type photocatalyst. Supported photocatalysts was prepared as follows: The precursor solution of B,N-SnO_(2)/TiO_(2) was diluted with n-propanol and heated at 100 ℃ for 1 h. The alumina fabrics was immersed in the loaded solution and heated at 100 ℃ for 1 h. Then the precursor immersed fabrics was dried by rotary evaporation method. Supported photocatalysts were obtained by calcining the dried fabrics at 450 ℃ for 30 min in air atmosphere. The catalysts were characterized by X-ray diffraction(XRD), scanning electron microscope(SEM), high-resolution transmission electron microscope(HRTEM), X-ray photoelectron spectroscopy(XPS) and UV-Vis diffuse reflectance spectra(UV-DRS). B,N-SnO_(2)/TiO_(2) powder photocatalysts were predominantly homogeneous anatase phase. The introduction of boron inhibited the growth of anatase phase crystal, and the grain size was 15 nm, showing a stacking structure. The results of HRTEM and energy dispersive

关 键 词：二氧化钛 二氧化锡 氧氟沙星 负载 可见光催化降解 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]