In order to improve the degradation rate of titanium dioxide/activated carbon fiber (TiO2/ACF) composites in dealing with harmful gases, Fe3+ was used to modify TiO2, and Fe3+-TiO2/ACF was prepared by sol-gel method.The properties of the material were characterized by PL, XRD, BET and SEM.Taking ammonia (NH3) and other gases as target degradants, the degradation effect of Fe3+-TiO2/ACF on the target degradants was studied.The results showed that the photocatalytic activity of TiO2 modified by Fe3+ doping was significantly improved.When the molar ratio of Fe3+∶Ti4+ was 1∶200, the photocatalytic activity was the highest.With the increase of Fe3+ doping amount, the average grain size of TiO2 decreased gradually.The specific surface area of ACF decreased after loading Fe3+-TiO2.After using Fe3+∶Ti4+(1∶200) to compound with ACF, the degradation efficiency of the target degradants was increased by 16%～21% compared with TiO2/ACF, and the degradation effect was significantly improved.The degradation rate of organic gases was higher than that of inorganic gases.
[1] 王文静,郭晓玲,王志刚,等.纳米二氧化钛光催化净化酸性染料废水的研究[J].西安工程大学学报,2011,25(2):4.
[2] 陈晓波.二氧化钛纳米材料及其能源应用[J].催化学报,2009,30(8):839-851.
[3] 谭树成,郑经堂,Tan Shucheng,等.活性炭纤维负载TiO2光催化剂研究[J].炭素,2006(3):15-18.
[4] Yuan R,Guan R,Shen W,et al.Photocatalytic degradation of methylene blue by a combination of TiO2 and activated carbon fibers[J].Journal of Colloid and Interface Science,2005,282(1):87-91.
[5] Miyawaki J,Shimohara T,Shirahama N,et al.Removal of NOx from air through cooperation of the TiO2 photocatalyst and urea on activated carbon fiber at room temperature[J].Applied Catalysis B:Environmental,2011,110:273-278.
[6] Yang H,Fu P.Surface properties and catalytic performance of activated carbon fibers supported TiO2 photocatalyst[J].Surface Review and Letters,2012,15(4):337-344.
[7] 郭晓玲,王向东,李勇,等.氮掺杂纳米TiO2负载活性炭纤维的制备及表征(英文)[J].稀有金属材料与工程,2012(S3):3.
[8] Go Y G,Zhang F J,Chen M L,et al.Fabrication of Zn-treated ACF/TiO2 composites and their photocataytic activity for degradation of methylene blue[J].Korean Journal of Materials Research,2009,19(3):142-150.
[9] Shi J W,Zheng J T,Ji XJ.TiO2-SiO2/activated carbon fibers photocatalyst:preparation,characterization,and photocatalytic activity[J].Environmental Engineering Science,2010,27(11):923-930.
[10] Hou Y,Li Y,Li Q,et al.Insight into the role of TiO2 modified activated carbon fibers for the enhanced performance in low-temperature NH3-SCR[J].Fuel,2019,245:554-562.
[11] Xu J P,Li L,Lv L Y,et al.Structural and magnetic properties of Fe-doped anatase TiO2 films annealed in vacuum[J].Chinese Physics Letters,2009,26(9):247-250.
[12] Khoshnevisan B,Marami M B,Farahmandjou M.Fe3+-doped anatase TiO2 study prepared by new sol-gel precursors[J].Chinese Physics Letters,2018,35(2):027501.
[13] 方选政.TiO2/ACF吸附—光催化降解室内VOC的研究[D].太原:太原理工大学,2016.
[14] 程婧晨,崔彤,何万清,等.北京市典型餐饮企业油烟中醛酮类化合物污染特征[J].环境科学,2015,(8):7.
[15] 陈根宝.厨房油烟气中特征污染物的分析研究[D].杭州:浙江工业大学,2009.
[16] 吴子敬,王雪峰,张宪忠.卫生间有害气体检测及排风方案设计[J].轻工科技,2014(12):2.
[17] 石德智,马靖元,张涵博,等.厕所恶臭物质组分及检测分析技术的研究进展[J].环境卫生工程,2021,29(3):9.
基金资助
山西省重点研发计划项目(社会发展领域)(201803D31035);山西省重点研发计划项目(201903D321043)
PDF
