改性TiO_2的制备及其在壁纸中的应用研究
|
摘要
以纳米TiO_2 (P25)为改性对象,通过简单的一步水热法制备了具有可见光催化活性的N掺杂改性P25光催化剂 (N-P25),借助X射线衍射仪、紫外-可见光谱仪和扫描电子显微镜对N-P25的结构进行表征;再将其涂布于壁纸上,通过对壁纸物理性能和光催化降解甲醛性能的综合对比选择最佳涂布工艺。结果表明,N-P25仍为混晶结构,但对可见光的响应得到提升。在最佳涂布工艺条件下,N-P25涂布量1. 5g/m~2的壁纸在日光灯照射6 h后,对甲醛的降解率可达87%;且对不同初始浓度甲醛的光催化降解符合LH一级反应动力学规律。
N-doped P25 photocatalysts (N-P25) with the visible light response were prepared using nano TiO_2 (P25) as raw materials by a simple one-step hydrothermal method,the photocatalysts' structure was characterized by XRD,UV-Vis DRS and SEM; The N-P25 was coated on the wallpaper,the optimum coating process was achieved by comprehensively compared the physical properties of the wallpaper and photocatalytic degradation of formaldehyde. The results showed that N-P25 was still mixed crystal structure,and the response to visible light was enhanced. Under the optimal coating process,the degradation rate of formaldehyde for wallpaper containing 1. 5 g/m~2 photocatalyst reached 87% after 6 h exposure under fluorescent lamp,and the photocatalytic degradation of formaldehyde at different initial concentrations conforms to the first-order reaction kinetics of L-H.
N-doped P25 photocatalysts (N-P25) with the visible light response were prepared using nano TiO_2 (P25) as raw materials by a simple one-step hydrothermal method,the photocatalysts' structure was characterized by XRD,UV-Vis DRS and SEM; The N-P25 was coated on the wallpaper,the optimum coating process was achieved by comprehensively compared the physical properties of the wallpaper and photocatalytic degradation of formaldehyde. The results showed that N-P25 was still mixed crystal structure,and the response to visible light was enhanced. Under the optimal coating process,the degradation rate of formaldehyde for wallpaper containing 1. 5 g/m~2 photocatalyst reached 87% after 6 h exposure under fluorescent lamp,and the photocatalytic degradation of formaldehyde at different initial concentrations conforms to the first-order reaction kinetics of L-H.
引文
[1]SU Hai-tao,XIE Li-bo,GUAN Xiu-lian,et al.Discuss on formaldehyde pollution in indoor air[J].China Modern Doctor,2012,50(8):34.苏海涛,谢丽波,关秀莲,等.论室内空气甲醛污染[J].中国现代医生,2012,50(8):34.
[2]Huang Y,Ho S S,Lu Y,et al.Removal of indoor volatile organic compounds via photocatalytic oxidation:A Short Review and Prospect[J].Molecules,2016,21(1):56.
[3]Cabir B,Yurderi M,Caner N,et al.Methylene blue photocatalytic degradation under visible light irradiation on copper phthalocyaninesensitized Ti O2nanopowders[J].Materials Science&Engineering B,2017,224(10):9.
[4]ZHANG Xiao-tong,ZHOU Guo-wei,BAI Guang-wei.Preparation of N,Ce Co-doping Mesoporous Ti O2and Its Application in Papermaking Wastewater Treatment[J].China Pulp&Paper,2010,29(2):38.章晓彤,周国伟,白光伟.氮铈共掺杂介孔Ti O2的制备及在造纸废水处理中的应用[J].中国造纸,2010,29(2):38.
[5]Singh J,Sahu K,Pandey A,et al.Atom beam sputtered Ag-Ti O2nanocomposite thin films for photocatalytic applications[J].Applied Surface Science,2017,411.
[6]Xu L,Steinmiller E M P,Skrabalak S E.Achieving synergy with a potential photocatalytic Z-scheme:synthesis and evaluation of nitrogen-doped Ti O2/Sn O2composites[J].Journal of Physical Chemistry C,2014,116(1):871.
[7]Hurum D C,And A G A,Gray K A,et al.Explaining the enhanced photocatalytic activity of Degussa P25 mixed-phase Ti O2using EPR[J].Journal of Physical Chemistry B,2003,107(19):4545.
[8]Kalan R E,Yaparatne S,Amirbahman A,et al.P25 titanium dioxide coated magnetic particles:Preparation,characterization and photocatalytic activity[J].Applied Catalysis B Environmental,2016,187(4):249.
[9]Bagheri S,Julkapli N M.Mixed-phase Ti O2photocatalysis:correlation between phase composition and photodecomposition of water pollutants[J].Reviews in Inorganic Chemistry,2017,37(1):11.
[10]WEI Zhe-dong,ZHANG Jian-guang,SONG Xian-liang,et al.Preparation and property of N-doped visible light response P25 photocatalysts[J].New Chemical Materials,2013,41(9):68.魏哲东,张建广,宋贤良,等.N掺杂P25可见光响应型光催化剂的制备及性能[J].化工新型材料,2013,41(9):68.
[11]LI Yuan-hua,LIU Huan-bin,TAO Jing-song,et al.Research Progress of Paper Tensile Strength Models[J].China Pulp&Paper,2014,33(1):65.李远华,刘焕彬,陶劲松,等.纸张抗张强度模型的研究进展[J].中国造纸,2014,33(1):65.
[12]CHEN Gang,FANG Zhi-qiang,HUANG Ting,et al.The Influence of Main Components of Coating Color on Penetration-resistance of Coating Paper[J].Transactions of China Pulp and Paper,2008,23(2):85.陈港,方志强,黄婷,等.涂料主要组分对涂布纸抗液体渗透性能的影响[J].中国造纸学报,2008,23(2):85.
[13]Liao Y,Xie C,Liu Y,et al.Comparison on photocatalytic degradation of gaseous formaldehyde by Ti O2,Zn O and their composite[J].Ceramics International,2012,38(6):4437.
[14]LI Ming-jie,YU Ze-bin,CHEN Ying,et al.Photocatalytic Degradation Kinetics of Perfluorooctaonic Acid(PFOA)in Ti O2Dispersion and Its Mechanism[J].Environmental Science,2014,35(7):2612.李明洁,喻泽斌,陈颖,等.Ti O2光催化降解PFOA的反应动力学及机制研究[J].环境科学,2014,35(7):2612.
[2]Huang Y,Ho S S,Lu Y,et al.Removal of indoor volatile organic compounds via photocatalytic oxidation:A Short Review and Prospect[J].Molecules,2016,21(1):56.
[3]Cabir B,Yurderi M,Caner N,et al.Methylene blue photocatalytic degradation under visible light irradiation on copper phthalocyaninesensitized Ti O2nanopowders[J].Materials Science&Engineering B,2017,224(10):9.
[4]ZHANG Xiao-tong,ZHOU Guo-wei,BAI Guang-wei.Preparation of N,Ce Co-doping Mesoporous Ti O2and Its Application in Papermaking Wastewater Treatment[J].China Pulp&Paper,2010,29(2):38.章晓彤,周国伟,白光伟.氮铈共掺杂介孔Ti O2的制备及在造纸废水处理中的应用[J].中国造纸,2010,29(2):38.
[5]Singh J,Sahu K,Pandey A,et al.Atom beam sputtered Ag-Ti O2nanocomposite thin films for photocatalytic applications[J].Applied Surface Science,2017,411.
[6]Xu L,Steinmiller E M P,Skrabalak S E.Achieving synergy with a potential photocatalytic Z-scheme:synthesis and evaluation of nitrogen-doped Ti O2/Sn O2composites[J].Journal of Physical Chemistry C,2014,116(1):871.
[7]Hurum D C,And A G A,Gray K A,et al.Explaining the enhanced photocatalytic activity of Degussa P25 mixed-phase Ti O2using EPR[J].Journal of Physical Chemistry B,2003,107(19):4545.
[8]Kalan R E,Yaparatne S,Amirbahman A,et al.P25 titanium dioxide coated magnetic particles:Preparation,characterization and photocatalytic activity[J].Applied Catalysis B Environmental,2016,187(4):249.
[9]Bagheri S,Julkapli N M.Mixed-phase Ti O2photocatalysis:correlation between phase composition and photodecomposition of water pollutants[J].Reviews in Inorganic Chemistry,2017,37(1):11.
[10]WEI Zhe-dong,ZHANG Jian-guang,SONG Xian-liang,et al.Preparation and property of N-doped visible light response P25 photocatalysts[J].New Chemical Materials,2013,41(9):68.魏哲东,张建广,宋贤良,等.N掺杂P25可见光响应型光催化剂的制备及性能[J].化工新型材料,2013,41(9):68.
[11]LI Yuan-hua,LIU Huan-bin,TAO Jing-song,et al.Research Progress of Paper Tensile Strength Models[J].China Pulp&Paper,2014,33(1):65.李远华,刘焕彬,陶劲松,等.纸张抗张强度模型的研究进展[J].中国造纸,2014,33(1):65.
[12]CHEN Gang,FANG Zhi-qiang,HUANG Ting,et al.The Influence of Main Components of Coating Color on Penetration-resistance of Coating Paper[J].Transactions of China Pulp and Paper,2008,23(2):85.陈港,方志强,黄婷,等.涂料主要组分对涂布纸抗液体渗透性能的影响[J].中国造纸学报,2008,23(2):85.
[13]Liao Y,Xie C,Liu Y,et al.Comparison on photocatalytic degradation of gaseous formaldehyde by Ti O2,Zn O and their composite[J].Ceramics International,2012,38(6):4437.
[14]LI Ming-jie,YU Ze-bin,CHEN Ying,et al.Photocatalytic Degradation Kinetics of Perfluorooctaonic Acid(PFOA)in Ti O2Dispersion and Its Mechanism[J].Environmental Science,2014,35(7):2612.李明洁,喻泽斌,陈颖,等.Ti O2光催化降解PFOA的反应动力学及机制研究[J].环境科学,2014,35(7):2612.