CAJ | 학술논문

采用在酸件条件下超声沉淀的方法低温制备了Bi掺杂TiO_2纳米粉体,采用X射线光电子能谱(XPS)、X射线衍射(XRD)和透射电镜(TEM)对催化剂进行了初步表征,发现其禁带宽度变窄,主要为锐钛矿(82.7%)和金红石(17.3%)混晶,纳米尺寸为25.8nm.以酸性桃红(SRB)和无色小分子2,4-二氯苯酚(2,4-dichlorophenol,2,4-DCP)作为探针反应,在可见光照射下(λ> 420nm)测定了SRB降解过程中总有机碳(TOC)的变化,发现SRB的TOC去除率为61.6%.跟踪测定光催化反应体系中氧化物种,表明光催化涉及羟基自由基(·OH)过程,所制备的催化剂在可见光下具有较高的催化氧化活性.
채용재산건조건하초성침정적방법저온제비료Bi참잡TiO_2납미분체,채용X사선광전자능보(XPS)、X사선연사(XRD)화투사전경(TEM)대최화제진행료초보표정,발현기금대관도변착,주요위예태광(82.7%)화금홍석(17.3%)혼정,납미척촌위25.8nm.이산성도홍(SRB)화무색소분자2,4-이록분분(2,4-dichlorophenol,2,4-DCP)작위탐침반응,재가견광조사하(λ> 420nm)측정료SRB강해과정중총유궤탄(TOC)적변화,발현SRB적TOC거제솔위61.6%.근종측정광최화반응체계중양화물충,표명광최화섭급간기자유기(·OH)과정,소제비적최화제재가견광하구유교고적최화양화활성.
Bi/TiO_2 powder had been prepared in acidity condition at low temperature by the method of ultrasonic deposition .The characteristics of TiO_2 and Bi/TiO_2 were carried out using XPS, XRD and TEM.The results showed that the band gap is narrower, the TiO_2 synthesized belonged to anatase (82.7%) and rutile (17.3%) and the size of Bi/TiO_2 was 25.8nm.The degradation of Sulforhodamine-B(SRB) and 2, 4-dichlorophenol(2, 4-DCP) was used as probe reaction .The changes of TOC values before and after had been measured during the photo-catalytic degradation of SRB under visible light irradiation.The results showed the TOC removal rate of SRB is 61.6% .Photo-catalytic degradation involved in OH through detecting oxidation species and catalyst prepared had high activity of catalysis and oxidation.