( 1. 東北大學(xué) 理學(xué)院， 沈陽 110004;
| 2. 東北大學(xué) 材料冶金學(xué)院， 沈陽 110004)
摘 要: 以TiOSO4為原料， 加入燃燒劑，采用燃燒合成法制備了納米TiO2；考察了燃燒劑的種類、 燃燒劑的加入量、 pH值、點(diǎn)火溫度、 煅燒時(shí)間等對(duì)產(chǎn)物的影響； 以甲基橙溶液為實(shí)驗(yàn)對(duì)象， 研究了該TiO2的光催化性能。結(jié)果表明： 以檸檬酸為燃燒劑， 當(dāng)TiO(NO3)2和檸檬酸的摩爾比為9∶15， 溶液pH＞5， 點(diǎn)火溫度為550℃時(shí)合成TiO2。 XRD測(cè)試表明， 合成產(chǎn)物為單一銳鈦礦型， 晶體粒度為14.8nm； TEM測(cè)試表明， 產(chǎn)品粒度分布均勻； 當(dāng)用高壓汞燈照射2h時(shí)， 甲基橙的降解率為91%。
關(guān)鍵字: 二氧化鈦； 光催化； 燃燒合成； 納米
（ 1. Science School, Northeastern University,
Shenyang 110004, China；
2. School of Materials and Metallurgy,
Northeastern University，Shenyang 110004, China）
Abstract: Nanosized titania was synthesized by combustion process by using TiOSO4 as raw material and citric acid as fuel. Preparing conditions were studied, such as fuels, amount of fuels, pH value, ignition temperature, calcinations time, etc. The results show that when molar ratio of Ti to citrate is 9∶15 then pH＞5 and ignition temperature is 550℃, TiO2 is prepared. XRD tests show that the products are anatase and the crystallite size is 14.8nm, and TEM tests indicate that the powders are uniform. Photocatalytic activity was carried out. After the solution of cymene orange is illuminated for 2h with UV lamp as light source, degradation efficiency of the solution is 91%.
Key words: titania； photocatalytic； combustion synthesis； nanosized
