活性氧化铝/硅藻土/纳米TiO_2功能涂料的制备及其对甲醛净化性能的研究
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摘要
以硅藻土为原料,添加TiO2,加入活性氧化铝改性剂,并通过添加其他助剂,制备了活性氧化铝/硅藻土/纳米TiO2功能涂料。在自制环境试验箱中研究了该涂料对空气中甲醛的净化功能。考察了功能涂料中活性氧化铝含量、反应时间、光照条件和TiO2含量等因素对甲醛降解率的影响。结果表明:活性氧化铝和TiO2质量分别为硅藻土质量40%和10%的功能涂料,在自然光照条件下,甲醛初始进样量为5μL,反应36h时,该涂料对甲醛的降解率可达94.08%。
Reactive alumina/diatomaceous earth/TiO_2 functional coatings were prepared by using diatomaceous earth and TiO_2 as raw materials.Reactive alumina and other additives were added to the composite to improve its purification performance.The property of formaldehyde purification was investigated in environmental test chambers.The effect of alumina amount,purification time,light condition and TiO_2 content on purification rate were studied.The results showed that when the mass ratio of alumina/diatomaceous earth and TiO_2/diatomaceous earth were 40% and 10%,respectively,and initial formaldehyde amount was 5μL,the purification rate of formaldehyde could up to 94.08%under natural sunlight after 36 hrs.
Reactive alumina/diatomaceous earth/TiO_2 functional coatings were prepared by using diatomaceous earth and TiO_2 as raw materials.Reactive alumina and other additives were added to the composite to improve its purification performance.The property of formaldehyde purification was investigated in environmental test chambers.The effect of alumina amount,purification time,light condition and TiO_2 content on purification rate were studied.The results showed that when the mass ratio of alumina/diatomaceous earth and TiO_2/diatomaceous earth were 40% and 10%,respectively,and initial formaldehyde amount was 5μL,the purification rate of formaldehyde could up to 94.08%under natural sunlight after 36 hrs.
引文
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[2] Kim C W,Song J S,Ahn Y S,et al.Occupational asthma due to formaldehyde[J].Yonsei Medical Journal,2001,42(4):439-445.
[3]杨振洲,蔡同建.室内甲醛的危害及其预防[J].中国公共卫生,2003(19):765-767.
[4]国家质量监督检验检疫总局,卫生部,国家环境保护总局.GB/T 18883—2002[S].北京:中国标准出版社,2002:2.
[5] Chen D,Qu Z,Zhang W,et al.TPD and TPSR studies of formaldehyde adsorption and surface reaction activity over Ag/MCM-41catalysts[J].Colloids&Surfaces A Physicochemical&Engineering Aspects,2011,379(1):136-142.
[6] Chen D,Qu Z,Shen S,et al.Comparative studies of silver based catalysts supported on different supports for the oxidation of formaldehyde[J].Catalysis Today,2011,175(1):338-345.
[7] Zhang M,An T,Fu J,et al.Photocatalytic degradation of mixed gaseous carbonyl compounds at low level on adsorptive TiO2/SiO2,photocatalyst using a fluidized bed reactor[J].Chemosphere,2006,64(3):423-431.
[8] Nakagawa K,Mukai S R,Suzuki T,et al.Gas adsorption on activated carbons from PET mixtures with a metal salt[J].Carbon,2003,41(4):823-831.
[9]赵亚娟,陈睿,刘阳生,等.负载无机铵盐改性活性炭纤维对甲醛去除能力的影响[J].环境科学学报,2010,30(3):572-577.
[10] Funk M,Wimmer R,Adamopoulos S.Diatomaceous earth as an inorganic additive to reduce formaldehyde emissions from particleboards[J].Wood Material Science&Engineering,2015,12(2):92-97.
[11]杨毳,毕博,孟岩岩,等.硅藻泥净化室内空气甲醛的实验研究[J].建材世界,2016,37(4):32-35.
[12]白艳军,刘艳伟.我国硅藻泥的发展现状与前景(Ⅰ)[J].现代涂料与涂装,2014,17(3):34-36.
[13] Xia Y,Li F,Jiang Y,et al.Interface actions between TiO2,and porous diatomite on the structure and photocatalytic activity of TiO2-diatomite[J].Applied Surface Science,2014,303(303):290-296.
[14] Fujishima A,Honda K.Electrochemical photolysis of water at a semiconductor electrode[J].Nature,1972,238(5358):37-38.
[15] Buchold D H,Feldmann C.Nanoscale gamma-AlO(OH)hollow spheres:synthesis and container-type functionality[J].Nano Letters,2007,7(11):3489-3492.
[16] Simonato S,Gr9ger H,M9llmer J,et al.Sorption and separation of CO2 via nanoscale AlO(OH)hollow spheres[J].Chemical Communications,2012,48(6):844-846.
[17]段雅楠,张兴惠,李梦绮.TiO2/活性碳纤维膜光催化降解甲醛的研究[J].化工新型材料,2018,46(2):127-130.
[18] Liu T X,Li F B,Li X Z.TiO2hydrosols with high activity for photocatalytic degradation of formaldehyde in a gaseous phase[J].Journal of Hazardous Materials,2008,152(1):347-355.
[19] Wang L,Sakurai M,Kameyama H.Study of catalytic decomposition of formaldehyde on Pt/TiO2alumite catalyst at ambient temperature[J].Journal of Hazardous Materials,2009,167(1):399-405.
[20]胡君杰,孙振亚.纳米TiO2建筑材料光催化净化室内甲醛研究进展[J].化工新型材料,2013,41(4):16-18.