本文選題：氧化錳 + 銅錳復(fù)合氧化物��； 參考：《科技導(dǎo)報》2017年23期

【摘要】：采用簡單的氧化還原方法,通過控制Cu和Mn物質(zhì)的量之比及煅燒溫度等條件合成了一系列銅錳復(fù)合氧化物。通過考察合成條件對催化劑的晶相、形貌以及催化活性的影響,從而確定最佳的工藝條件,結(jié)合X射線衍射(XRD)、掃描電鏡(SEM)和透射電鏡(TEM)等多種表征手段揭示催化劑結(jié)構(gòu)和活性的關(guān)系。研究結(jié)果表明,在單一錳氧化物中,銅的摻雜促進(jìn)氧物種移動,使得銅錳復(fù)合氧化物具有較低的還原溫度和較強(qiáng)氧化還原能力,且結(jié)晶度差的無定型態(tài)同樣有利于氧空穴的增加,從而有利于甲醛的催化氧化。當(dāng)Cu/Mn物質(zhì)的量之比為1∶2、煅燒溫度為300℃時制得的銅錳復(fù)合催化劑催化性能最佳,能夠在90℃下完全降解甲醛。
[Abstract]:A series of Cu-Mn complex oxides were synthesized by controlling the ratio of Cu to mn and calcination temperature by a simple redox method. By investigating the effects of synthesis conditions on the crystal phase, morphology and catalytic activity of the catalyst, the optimum process conditions were determined. The relationship between the structure and activity of the catalyst was revealed by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that in the single manganese oxide, the doping of copper promotes the oxygen species movement, which makes the Cu-Mn composite oxide have lower reduction temperature and stronger redox ability. The amorphous state with poor crystallinity is also beneficial to the increase of oxygen hole and thus to the catalytic oxidation of formaldehyde. When the mass ratio of Cu / mn is 1: 2 and the calcination temperature is 300 鈩，

本文編號：2002152