CAJ | 학술논문

以硫酸钛为钛源,采用溶胶-凝胶法制备纳米二氧化钛,以X-射线衍射( XRD)、场发射扫描电镜( FESEM)进行表征,研究钨和铬离子掺杂对纳米二氧化钛结构及其光催化性能的影响。结果表明,掺铬可提高二氧化钛的结晶度,使光催化性能降低,Cr3+在掺入比1%时的光催化效率相对较大,为55．28%；W6+对二氧化钛晶粒的生长有一定的抑制作用,使二氧化钛的结晶度降低,过高的掺钨量会使光催化性能迅速下降,同时在产物中引入其他钛氧化物,掺钨比为0．3%时光催化效率最大,为81．28%,粗略计算,此时的粒径下降到10nm以下；两种离子的掺入均可在一定煅烧温度下提高向金红石相转变的程度。
이류산태위태원,채용용효-응효법제비납미이양화태,이X-사선연사( XRD)、장발사소묘전경( FESEM)진행표정,연구오화락리자참잡대납미이양화태결구급기광최화성능적영향。결과표명,참락가제고이양화태적결정도,사광최화성능강저,Cr3+재참입비1%시적광최화효솔상대교대,위55．28%；W6+대이양화태정립적생장유일정적억제작용,사이양화태적결정도강저,과고적참오량회사광최화성능신속하강,동시재산물중인입기타태양화물,참오비위0．3%시광최화효솔최대,위81．28%,조략계산,차시적립경하강도10nm이하；량충리자적참입균가재일정단소온도하제고향금홍석상전변적정도。
Using titanium sulfate as titanium source and sol-gel method, this paper discusses the product nano titanium dioxide, tungsten and chromium ion doping on the properties of nano titanium dioxide structure and photocatalytic effect by X-ray diffraction ( XRD) and field emission scanning electron mi-croscopy ( FESEM ) . The results show that the doped chromium can increase the crystallinity of TiO2 , lower the pho-tocatalytic performance, and the photocatalytic efficiency of the product mixed with 1% Cr3+ is relatively large, 55. 28%;W6+has certain inhibitory effect on the growth of TiO2 , reduce the crystallinity of TiO2 , excessive amount of doped tungsten can make photocatalytic performance drops rapidly and introduce other product titanium oxide at the same time, the photocatalytic efficiency of the product mixed with 1% Cr3+ is largest, 81. 28% and the size below 10nm by rough calculation; Dopping two kinds of ions can increase the transition extent of the rutile phase at certain calcination tem-perature.