| 纳米MnO2改性木材对甲醛的光催化降解研究 |
| |
| 引用本文： | 刘辛燕,薛静,何淑娟,仝莉,马晓军.纳米MnO2改性木材对甲醛的光催化降解研究[J].西北林学院学报,2014,29(3):194-197. |
| |
| 作者姓名： | 刘辛燕 薛静 何淑娟 仝莉 马晓军 |
| |
| 作者单位： | （天津科技大学 木材科学与工程系，天津 300222） |
| |
| 摘 要： | 以杉木为载体，低温水热工艺制备出纳米MnO2改性木材光催化复合材料，考察了不同HCI摩尔比、光照强度、降解时间、用量对甲醛的降解性能的影响。结果表明:随着制备MnO2改性杉木材料时的HCI摩尔比的增加，其对甲醛的降解率先增加后降低；而随着降解时间的增加其甲醛降解率逐渐趋于平缓。MnO2改性杉木材料在室温阳面自然光照射下对甲醛的催化降解72 h达到92.42%；而甲醛降解率随着白炽灯功率增加却呈下降的趋势。当用0.9 g的MnO2改性杉木材料在白炽灯15 W的照射下，HCI浓度为2 mol·L-1时，降解时间3 h，甲醛催化降解率达到98.37%。
|
| 关 键 词： | 木材 二氧化锰 催化降解 甲醛 |
Photocatalytic Degradation of Formaldehyde by Nano-MnO2 Modified Wood |
| |
| LIU Xin-yan,XUE Jing,HE Shu-juan,TONG Li,MA Xiao-jun. Photocatalytic Degradation of Formaldehyde by Nano-MnO2 Modified Wood[J].Journal of Northwest Forestry University,2014,29(3):194-197. |
| |
| Authors: | LIU Xin-yan XUE Jing HE Shu-juan TONG Li MA Xiao-jun |
| |
| Institution: | （Department of Wood Science and Technology, Tianjin University of Science & Technology，Tianjin 300222，China） |
| |
| Abstract: | Taking the timber of Chinese fir (Cunninghamia lanceolata) as the carrier,nano-MnO2 modified wood photocatalytic material was prepared by low temperature hydrothermal method process.Effects on degradation of formaldehyde of different factors were examined,such as molar ratio of HCl,light intensity,degradation time, and amount of MnO2 in modified wood photocatalytic material.It was indicated that the degradation rate of formaldehyde first increased and then decreased with the increase of molar ratio of HCl during the preparation of MnO2 modified fir material.With the increase of time,the degradation rate gradually became stable.The photocatalytic degradation of formaldehyde reached to 92.42% after 72 h sunny side natural lightening at ambient temperature.The degradation rate of formaldehyde tended to decrease with the increase of incandescent lamp power. The rate of formaldehyde degradation reached 98.37% when modified fir material (in which the amount of MnO2 was 0.9 g) was exposed under the 15 W incandescent lamp,the hydrochloric acid concentration was 2 mol·L-1, the degradation time was 3 hours. |
| |
| Keywords: | wood manganese dioxide degradation formaldehyde |
|
| 点击此处可从《西北林学院学报》浏览原始摘要信息 |
| 点击此处可从《西北林学院学报》下载免费的PDF全文 |
