黏土基二氧化钛水热制备及其光催化性能研究
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摘要
以凹凸棒黏土为载体,氟钛酸铵为钛源,采用一步水热法制备了二氧化钛/凹凸棒黏土复合材料。通过X射线衍射(XRD)、拉曼光谱(Raman)、透射电子显微镜(TEM)、X射线能谱(EDS)、热失重(TG)、比表面积分析等,对二氧化钛/凹凸棒黏土复合材料进行了结构和形貌表征,并考察了其对罗丹明B的光催化性能。结果表明,二氧化钛/凹凸棒黏土是由平均直径约为25.8 nm的锐钛矿二氧化钛纳米粒子均匀负载于凹凸棒黏土表面而形成;二氧化钛/凹凸棒黏土保持了黏土的纳米棒状和多孔结构,比表面积为90.4 m2/g,平均孔径和孔体积分别为10.9 nm和0.28 cm3/g。二氧化钛/凹凸棒黏土具有良好的吸附特征和光催化活性,20 min对罗丹明B的暗吸附率为42.0%,紫外光照射60 min降解率达到98.1%。
The TiO_2/attapulgite composite was prepared by hydrothermal method with H8 F6 N2 Ti as titanium source and attapulgite clay as carrier.The structure and morphology of the as-prepared TiO_2/attapulgite composite was characterized by XRD,Raman,TEM,EDS,TG and specific surface area analyzer etc..The degradation of the Rhodamine B was studied to explore the photocatalytic activity.The results showed that TiO_2/attapulgite was formed by TiO_2 nanoparticles with an average diameter of25.8 nm dispersing quite uniformly over the surface of attapulgite. Meanwhile,TiO_2/attapulgite retained the nanorod and porous structure of clay,whose BET surface area,average pore size and pore volume,were 90.4 m2/g,10.9 nm and 0.28 cm3/g,respectively.Due to the high adsorptive and photocatalytic capability,the adsorption rate of TiO_2/attapulgite for dark adsorption rate could attain to 42.0% within 20 min,and the degradation rate of Rhodamin B could reach 98.1% within 60 min under the ultraviolet light irradiation.
The TiO_2/attapulgite composite was prepared by hydrothermal method with H8 F6 N2 Ti as titanium source and attapulgite clay as carrier.The structure and morphology of the as-prepared TiO_2/attapulgite composite was characterized by XRD,Raman,TEM,EDS,TG and specific surface area analyzer etc..The degradation of the Rhodamine B was studied to explore the photocatalytic activity.The results showed that TiO_2/attapulgite was formed by TiO_2 nanoparticles with an average diameter of25.8 nm dispersing quite uniformly over the surface of attapulgite. Meanwhile,TiO_2/attapulgite retained the nanorod and porous structure of clay,whose BET surface area,average pore size and pore volume,were 90.4 m2/g,10.9 nm and 0.28 cm3/g,respectively.Due to the high adsorptive and photocatalytic capability,the adsorption rate of TiO_2/attapulgite for dark adsorption rate could attain to 42.0% within 20 min,and the degradation rate of Rhodamin B could reach 98.1% within 60 min under the ultraviolet light irradiation.
引文
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[3]胡驰.石墨烯/二氧化钛的制备及钙钛矿太阳能电池性能研究[J].无机盐工业,2018,50(8):49-51.
[4] Deng L,Xie Y,Zhang G.Synthesis of C-Cl-codoped titania/attapulgite composites with enhanced visible-light photocatalytic activity[J].Chinese Journal of Catalysis,2017,38(2):379-388.
[5]郭天中,徐志永.纳米二氧化钛/硅藻土复合材料制备及光催化性能研究[J].无机盐工业,2017,49(4):79-82.
[6] Huang D.Preparation and characterization of high-surface-area TiO2/activated carbon by low-temperature impregnation[J].Separation and Purification Technology,2011,78(1):9-15.
[7]王利剑.不同钛盐对制备纳米二氧化钛/硅藻土复合材料性能的影响[J].无机盐工业,2018,50(7):84-86.
[8]李亚.磁性凹土基复合材料的制备、改性及交联固定化脂肪酶[J].高校化学工程学报,2014,28(6):1378-1383.
[9] Xue A L,Zhou S Y,Zhao Y J,et al.Effective NH2-grafting on attapulgite surfaces for adsorption of reactive dyes[J].Journal of Hazardous Materials,2011,194(5):7-14.
[10]许兵.α-Fe2O3纳米材料的微结构调控及其光催化性能研究[D].济南:山东大学,2012.
[11] Chen L,Xu J,Hu J.Removal of U(Ⅵ)from aqueous solutions by using attapulgite/iron oxide magnetic nanocomposites[J].Journal of Radioanalytical&Nuclear Chemistry,2013,297(1):97-105.
[12] Fan Q H,Li P,Chen Y F,et al.Preparation and application of attapulgite/iron oxide magnetic composites for the removal of U(Ⅵ)from aqueous solution[J].Journal of Hazardous Materials,2011,192(3):1851-1859.
[13] Xavier K C M.Effects of acid treatment on the clay palygorskite:XRD,surface area,morphological and chemical composition[J].Materials Research,2014,17(8):3-8.
[14] Dong W.Preparation of three-dimensional interconnected mesoporous anatase TiO2-SiO2nanocomposites with high photocatalytic activities[J].Chinese Journal of Catalysis,2016,37(6):846-854.
[15]王海,吴玉,徐柏庆.方形锐钛矿TiO2纳米晶的合成及表征[J].高等学校化学学报,2005,26(4):607-610.
[16] Zhao G,Wang J,Li Y,et al.Enzymes immobilized on superparamagnetic Fe3O4@clays nanocomposites:Preparation,characterization,and a new strategy for the regeneration of supports[J].Journal of Physical Chemistry C,2011,115:6350-6359.
[17]李曙光,白春华,王岩,等.蛋白土为载体二氧化钛光催化材料制备与表征[J].无机盐工业,2017,49(12):61-64.
[18]张齐,李裕,孙翠桃.磁性炭基TiO2复合光催化剂的制备及降解罗丹明B的研究[J].化工新型材料,2015,43(2):180-183.