In order to explore the influence of different factors on the degradation of ammonia (NH3) by Fe3+-TiO2/ACF,Fe3+-TiO2/ACF composite material was adopted,with NH3 as the target degradation substance,and the influence of initial concentration,flow rate,photocatalyst load and light intensity on the degradation of NH3 by Fe3+-TiO2/ACF was studied.The corresponding reaction kinetics analysis was carried out.The results showed that the degradation rate of NH3 decreased slightly with the increase of initial concentration,and the photocatalytic process basically conformed to the L-H first-order reaction kinetics model.With the increase of flow velocity,the degradation rate of NH3 firstly increased and then decreased,and the photocatalytic process was basically consistent with the L-H first-order reaction kinetics model.The degradation rate of NH3 increased slightly with the increase of photocatalyst load and light intensity.
[1] Teng X,Hu Q,Zhang L,et al.Identification of major sources of atmospheric NH3 in an urban environment in northern China during wintertime[J].Environmental Science & Technology,2017,51(12):6839-6848.
[2] Zhao Y,Shi R,Bian X,et al.Ammonia detection methods in photocatalytic and electrocatalytic experiments:how to improve the reliability of NH3 production rates[J].Advanced Science,2019,6(8):1802109.
[3] Lim T T,Yap P S,Srinivasan M,et al.TiO2/AC composites for synergistic adsorption-photocatalysis processes:present challenges and further developments for water treatment and reclamation[J].Critical Reviews in Environmental Science and Technology,2011,41(13):1173-1230.
[4] Zou W,Gao B,Ok Y S,et al.Integrated adsorption and photocatalytic degradation of volatile organic compounds (VOCs) using carbon-based nanocomposites:a critical review[J].Chemosphere,2019,218:845-859.
[5] Natarajan S,Bajaj H C,Tayade R J.Recent advances based on the synergetic effect of adsorption for removal of dyes from waste water using photocatalytic process[J].Journal of Environmental Sciences,2018,65:201-222.
[6] Cheng Q,Zhang G K.Enhanced photocatalytic performance of tungsten-based photocatalysts for degradation of volatile organic compounds:a review[J].Tungsten,2020,2(3):240-250.
[7] Kim C,Choi M,Jang J.Nitrogen-doped SiO2/TiO2 core/shell nanoparticles as highly efficient visible light photocatalyst[J].Catalysis Communications,2010,11(5):378-382.
[8] Khalid N R,Hammad A,Tahir M B,et al.Enhanced photocatalytic activity of Al and Fe co-doped ZnO nanorods for methylene blue degradation[J].Ceramics International,2019,45(17):21430-21435.
[9] Amaechi I C,Youssef A H,Kolhatkar G,et al.Ultrafast microwave-assisted hydrothermal synthesis and photocatalytic behaviour of ferroelectric Fe3+-doped BaTiO3 nanoparticles under simulated sunlight[J].Catalysis Today,2021,360:90-98.
[10] Mi Y,Wen L,Wang Z,et al.Fe(Ⅲ) modified BiOCl ultrathin nanosheet towards high-efficient visible-light photocatalyst[J].Nano Energy,2016,30:109-117.
[11] Mancuso A,Navarra W,Sacco O,et al.Photocatalytic degradation of thiacloprid using tri-doped TiO2 photocatalysts:a preliminary comparative study[J].Catalysts,2021,11(8):927.
[12] 李慧锋,李明春.Fe3+掺杂光催化剂改性机制的研究进展[J].石油化工,2023,52(2):237-244.
[13] Takeda N,Ohtani M,Torimoto T,et al.Evaluation of diffusibility of adsorbed propionaldehyde on titanium dioxide-loaded adsorbent photocatalyst films from its photodecomposition rate[J].Journal of Physical Chemistry B,1997,101(14):2644-2649.
[14] Gaya U I,Abdullah A H.Heterogeneous photocatalytic degradation of organic contaminants over titanium dioxide:a review of fundamentals,progress and problems[J].Journal of Photochemistry and Photobiology C:Photochemistry Reviews,2008,9(1):1-12.
[15] 杜晶晶,赵军伟,程晓民,等.一维TiO2纳米管光催化降解气相苯的动力学研究[J].人工晶体学报,2020,49(12):2308-2312,2321.
[16] Zhong Lexuan,Haghighat Fariborz,Lee Chang-Seo,et al.Performance of ultraviolet photocatalytic oxidation for indoor air applications:systematic experimental evaluation[J].Journal of Hazardous Materials,2013,261:130-138.
[17] 杨洋.TiO2基薄膜的制备及其对气相甲酸的光催化降解研究[D].南京:南京信息工程大学,2022.
[18] 彭嫚.TiO2-GR/ACF复合材料的制备及其降解甲醛特性试验研究[D].北京:北京建筑大学,2021.
基金资助
山西省重点研发计划项目(201903D321043)