化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (11) : 245-250. DOI: 10.19817/j.cnki.issn1006-3536.2022.11.049

开发与应用

分层法制备TiO₂水泥复合砂浆及其光催化性能

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作者信息 +

Preparation and photocatalytic performance of TiO₂ cement composite mortar by layering method

Li Xiong¹, Wang Gongxun^1,3, Liu Fucai², Deng Jing¹, Xiao Min²

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Received		Published
2021-07-13		2022-11-20
Issue Date	Revised Date
2022-11-30	2021-07-13

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摘要

采用分层法制备TiO₂水泥复合砂浆,测试了不同TiO₂掺量、面层厚度复合砂浆的力学性能和干缩性能,研究了光照强度、罗丹明B浓度、环境作用等因素对砂浆光催化性能的影响规律。结果表明,随TiO₂掺量及面层厚度的增大,复合砂浆的强度下降、干缩率增大;当砂浆面层厚度为5mm、TiO₂掺量为5%时,其对复合砂浆的强度影响较小;光源类型与光强对早期降解速率的影响显著,光照60min内,自然太阳光照射下的TiO₂水泥复合砂浆对罗丹明B的降解率最大,200W紫外灯次之,短波紫外光和长波紫外光依次减少;随TiO₂掺量的增加,复合砂浆的碳化深度增大,但碳化作用对TiO₂水泥复合砂浆光催化性能的影响较小;环境湿度变化对TiO₂水泥复合砂浆光催化性能的影响较显著,其中,浸水环境的影响最大,自然环境和干湿循环的次之,而干燥环境条件下的最小。

Abstract

The TiO₂ cement composite mortar was prepared by layering method,and the mechanical properties and dry shrinkage properties of the composite mortar with different TiO₂ contents and surface layer thickness were measured.The influences of light intensity,rhodamine B concentration and environmental effects on the photocatalytic properties of the mortar were investigated.The results showed that,with the increase of TiO₂ content and surface layer thickness,the strength of the composite mortar decreased and the dry shrinkage increased;It had a minimal impact on the strength of the composite mortar when layer thickness was 5mm and the TiO₂ content was 5%.The light source type and light intensity had obvious effects on the early degradation rate.Within 60 minutes of light exposure,the degradation rate of TiO₂ cement composite mortar rhodamine B under natural light irradiation was the largest,followed by 200W UV lamp,and the short-wave UV and long-wave UV decreased in order.The carbonation depth of composite mortar increased with the increase of TiO₂ doping,but the effect of carbonation on the photocatalytic performance of TiO₂ cement composite mortar was small.The environmental humidity had a significantly impact on the photocatalytic performance of TiO₂ cement composite mortar,among which,the effect of submerged environment was the largest,natural environment and dry and wet cycles were the second,and dry environmental conditions were the smallest.

关键词

分层法 / 纳米TiO₂水泥复合砂浆 / 光催化性能 / 降解率

Key words

layering method / nano-TiO₂ cement composite mortar / photocatalytic performance / degradation rate

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分层法制备TiO₂水泥复合砂浆及其光催化性能[J]. 化工新型材料, 2022, 50(11): 245-250 DOI:10.19817/j.cnki.issn1006-3536.2022.11.049

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参考文献

原文顺序 | 出版日期 | 本文引用

[1] Mayer K B,Johnson C,Yang Y,et al.From micro to macro-contaminants:the impact of low-energy titanium dioxide photocatalysis followed by filtration on the mitigation of drinking water organics[J].Chemosphere,2019(217):111-121.
[2] 张拦,杨瑞先,丁梧秀.硫镧共掺杂纳米TiO₂的制备及甲醛降解性能研究[J].功能材料,2016,47(3):3120-3124.
[3] 卫贤贤,王潇潇,曹艳芝,等.高性能介孔TiO₂制备及其在染料废水处理应用[J].功能材料,2018,49(12):12184-12189.
[4] 梁辰,吴艳青,王大伟,等.纳米TiO₂光催化水泥基材料的研究进展[J].材料导报,2019,33(S2):267-272.
[5] Dahlan S A.Impact of nanotechnology on high performance cement and concrete[J].Journal of Molecular Structure,2021,1223:128896.
[6] Ratan K J,Saini A.Enhancement of photocatalytic activity of self-cleaning cement[J].Materials Letters,2019,244:178-181.
[7] Guo M Z,Poon S C.Superior photocatalytic NO_x removal of cementitious materials prepared with white cement over ordinary Portland cement and the underlying mechanisms[J].Cement and Concrete Composites,2018,90:42-49.
[8] Ovodok E,Maltanava H,Poznyak S,et al.Rhodamine-loaded TiO₂ particles for detection of polymer coating UV degradation[J].Materials Today:Proceedings,2020,20(3):320-328.
[9] George J,Gopalakrishnan C C,Manikuttan P K,et al.Preparation of multi-purpose TiO₂ pigment with improved properties for coating applications[J].Poweder Technology,2021,377:269-273.
[10] 宋薇,聂阳,李世博,等.涂覆型TiO₂光催化材料的制备及光催化性能研究[J].功能材料,2018,49(10):10006-10011.
[11] Feng S L,Song J W,Liu F H,et al.Photocatalytic properties,mechanical strength and durability of TiO₂/cement composites prepared by a spraying method for removal of organic pollutants[J].Chemosphere,2020,254:126813.
[12] 何军辉,姚武.沸石及水泥基材料二次负载TiO₂的光催化性能[J].建筑材料学报,2020,23(1):35-39.
[13] Lu Y,Amer H,Li Z,et al.Photocatalytic concrete for NO_x abatement:supported TiO₂ efficiencies and impacts[J].Cement and Concrete Research,2019,116:57-64.
[14] Bruno O B,Joao V S d M.Concrete blocks nano-modified with zinc oxide (ZnO) for photocatalytic paving:performance comparison with titanium dioxide (TiO₂)[J].Construction and Building Materials,2020,252:119120.
[15] Cordero J M,Hingorani R,Jimenez-Relinque E,et al.NO_x removal efficiency of urban photocatalytic pavements at pilot scale[J].Science of The Total Environment,2020,719:137459.
[16] Wang D,Hou P K,Yang P,et al.BiOBr@SiO₂ flower-like nanospheres chemically-bonded on cement-based materials for photocatalysis[J].Applied Surface Science,2018(430):539-548.
[17] Daniyal M d,Akhtar S,Azam A.Effect of nano-TiO₂ on the properties of cementitious composites under different exposure environments[J].Journal of Materials Research and Technology,2019,8(6):6158-6172.
[18] Song C W,Hong G T,Choi S C.Effect of dispersibility of carbon nanotubes by silica fume on material properties of cement mortars:hydration,pore structure,mechanical properties,self-desiccation,and autogenous shrinkage[J].Construction and Building Materials,2020,265:120318.
[19] 杨正宏,许亚飞,朱洪波,等.纳米氧化石墨烯对水泥基人造石性能的影响[J].建筑材料学报,2021,24(4):701-709.
[20] Lee S J,Kawashima S H,Kim K J,et al.Shrinkage characteristics and strength recovery of nanomaterials-cement composites[J].Composite Structures,2018,202:559-565.
[21] 付荣荣,李延敏,高善民,等.TiO₂光催化剂的形貌与晶面调控[J].无机化学学报,2014,30(10):2231-2245.
[22] 张瑾,徐刘君,朱忠其,等.Yb,N共掺杂TiO₂光催化剂的制备及可见光下降解亚甲基蓝的研究[J].功能材料,2015,46(4):4118-4122.
[23] Abderrahim E M,Omar Z,Joaquim C G,et al.Elucidation of the photocatalytic degradation mechanism of an azo dye under visible light in the presence of cobalt doped TiO₂ nanomaterials[J].Chemosphere,2021,266:128931.
[24] 万燕,魏任星,卢挺,等.二氧化钛多相光催化降解有机污染物影响因素研究进展[J].现代化工,2018,38(5):53-56,58.
[25] Wang Z,Wang Y P,Vivar M,et al.Photovoltaic and photocatalytic performance study of SOLWAT system for the degradation of Methylene Blue,Acid Red 26 and 4-Chlorophenol[J].Applied Energy,2014,120:1-10.
[26] Casagrande C A,Repette W L,Hotza D.Effect of environmental conditions on degradation of NO_x gases by photocatalytic nanotitania-based cement mortars after long-term hydration[J].Journal of Cleaner Production,2020,274:123067.
[27] Seo D W,Yun T S.NO_x removal rate of photocatalytic cementitious materials with TiO₂ in wet condition[J].Building and Environment,2017,112:233-240.
[28] Duan P,Yan C J,Luo W J,et al.Effects of adding nano-TiO₂ on compressive strength,drying shrinkage,carbonation and microstructure of fluidized bed fly ash based geopolymer paste[J].Construction and Building Materials,2016,106:115-125.
[29] Praveenkumar T R,Vijayalakshmi M M,Meddah M S.Strengths and durability performances of blended cement concrete with TiO₂ nanoparticles and rice husk ash[J].Construction and Building Materials,2019,217:343-35.
[30] Sumesh M,Alengaram U J,Jumaat M Z,et al.Incorporation of nano-materials in cement composite and geopolymer based paste and mortar-a review[J].Construction and Building Materials,2017,148:62-84.