暴露｛111｝面的截顶点四棱双锥锐钛矿多面体的制备(英文)  

Synthesis of truncated anatase bipyramids with exposure of｛111｝facets

作　　者：周明慧[1] 杨晴[1] 

机构地区：[1]中国科学技术大学合肥微尺度物质科学国家实验室化学系,安徽合肥230026

出　　处：《中国科学技术大学学报》2013年第2期115-119,共5页JUSTC

基　　金：Supported by the National Nature Science Foundation of China(21071136);the National Basic Research(973)Program of China(2010CB934700,2012CB922000);the Anhui Provincial Education Department(KJ2012ZD11)

摘　　要：以四氟化钛为前驱物、P123为表面活性剂、柠檬酸为稳定剂、盐酸为酸性调节剂、氟化铵为添加剂,利用水热方法首次制备出暴露{111}面的截顶点四棱双锥锐钛矿多面体.通过XRD,SEM,TEM,HRTEM,SEAD和EDX对所制备的多面体的组成、结构和形貌进行了分析和表征.结果显示:柠檬酸和氟化铵的使用,有利于锐钛矿多面体的取向生长和{111}晶面的保留.同时研究发现,所制备的多面体在碱性和紫外光照条件下对亚甲基蓝(MB)具有很好的催化活性和降解效果,显示出潜在的应用价值.Polyhedrons of truncated anatase bipyramids with exposure of { 111 } facets were hydrothermally synthesized from hydrolysis of TiF4 in the presence of NH4F, HC1, and tri-block copolymer P123 using citric acid monohydrate as a stabilizer. The phase, crystal structure, morphology, chemical composition and property of the anatase polyhedrons were characterized by various techniques of X-ray diffraction （XRD）, transmission electron microscopy （TEM）, high- resolution transmission electron microscopy （HRTEM）, scanning electron microscopy （SEM）, selected area electron diffraction （SEAD）, energy-dispersive Xray spectrometry （EDX） and UV radiations, and their high performances in photo-degradation of methylene blue （MB） under alkaline conditions were specifically recognized.

关 键 词：二氧化钛多面体 取向生长 水热合成 光催化剂 

分 类 号：O78[理学—晶体学]