發(fā)布時間：2018-06-28 16:15

  本文選題：可見光光催化 + 原位制備�。� 參考：《內(nèi)蒙古工業(yè)大學》2015年碩士論文

【摘要】：Ti O2作為一種化學性質(zhì)穩(wěn)定、無毒、廉價的半導體氧化物,以其在紫外光下良好的光催化活性得到廣泛關注,然而由于其自身缺陷(寬禁帶、易流失、分離回收難),Ti O2極難實際應用于有機污染廢水的處理。為了提高Ti O2在工業(yè)廢水處理領域中的利用率,通常采用負載與摻雜等方法對Ti O2進行改性。本文以鈦酸丁酯、硝酸銅、硝酸鎳、高嶺土等為原料,原位制備了X-Ti O2/SO42-/CK(X=Cu、Ni)催化劑,以羅丹明B為模擬污染物評價其在可見光下的光催化活性,重點考察了制備過程中摻雜量、浸漬酸濃度、焙燒溫度對其光催化活性的影響,實驗結(jié)果證明,本文制備的催化劑在可見光下具有良好的光催化活性,催化劑X-Ti O2/SO42-/CK(X=Cu、Ni)的摻雜量為1wt%Cu或0.75at%Ni,酸處理載體濃度為20%,催化劑焙燒溫度為450℃,此時催化劑光催化效果最佳。利用XRD、BET、EDS、TEM、FTIR、UV-Vis、XPS等表征手段對所制備的X-Ti O2/SO42-/CK(X=Cu、Ni)催化劑結(jié)構(gòu)和顆粒特性等進行了表征和分析。XRD測試結(jié)果表明催化劑X-Ti O2/SO42-/CK(X=Cu、Ni)中同時存在銳鈦礦型Ti O2與金紅石型Ti O2;BET結(jié)果分析結(jié)果顯示負載后載體的比表面積有所增加;HTEM及EDS測試結(jié)果表明催化劑表面存在Cu和Ti O2,且Ti O2的晶格間距發(fā)生變化;XPS結(jié)果表明Ti、O的結(jié)合能降低,可能是由于摻雜物使Ti O2晶格間距發(fā)生變化導致的;Py-FTIR證明了該催化劑既含有B酸又含有L酸。
[Abstract]:As a stable, non-toxic and cheap semiconductor oxide, TIO _ 2 has attracted wide attention due to its excellent photocatalytic activity under ultraviolet light. However, due to its own defects (wide band gap, easy loss), TIO _ 2 is easy to be lost because of its excellent photocatalytic activity under ultraviolet light. It is very difficult to apply TIO _ 2 to the treatment of organic pollution wastewater. In order to improve the utilization of TIO _ 2 in industrial wastewater treatment, TIO _ 2 was modified by loading and doping methods. Using butyl titanate, copper nitrate, nickel nitrate and kaolin as raw materials, X-TiO _ 2 / so _ 4 _ 2-r _ (CK) catalyst was prepared in situ. Rhodamine B was used as a simulated pollutant to evaluate its photocatalytic activity under visible light. The effect of impregnation acid concentration and calcination temperature on the photocatalytic activity of the catalyst was studied. The experimental results show that the catalyst prepared in this paper has good photocatalytic activity under visible light. The doping amount of X-TiO _ 2 / so _ 42-P _ (CK) is 1 wk Cu or 0.75 at Ni, the concentration of acid treatment support is 20 and the calcination temperature is 450 鈩，

本文編號：2078594