PPy/TiO_2复合微球的制备及其吸附-紫外光催化性能研究
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摘要
以盐酸为无机酸,采用原位聚合法制备出不同摩尔比的聚吡咯/二氧化钛(PPy/TiO_2)复合微球,以亚甲基蓝(MB)染料为目标污染物,考察了PPy/TiO_2复合微球的吸附-紫外光催化性能以及影响因素。结果表明:制备PPy/TiO_2复合微球的最佳条件为摩尔比10∶1,投加量为1.5g/L;提高反应温度有利于光催化效率的提升,但对吸附量影响小;在酸性条件下废水中MB的去除效果优于中性和碱性条件下的去除效果;影响因素优化后,经30min吸附和3h紫外光催化处理,MB的去除率可达99.1%;PPy/TiO_2复合微球对MB和孔雀石绿这2种离子染料均有较高的去除率;紫外光催化降解MB的反应符合Langmuir-Hinshelwood动力学模型;复合微球循环使用20次对MB的去除率依然可达到92.7%以上,说明PPy/TiO_2复合微球有极强的循环稳定性和应用潜力。
Hydrochloric acid used as an inorganic acid,PPy/TiO_2 composite microspheres with different molar ratio were prepared by in situ polymerization.The adsorption of PPy/TiO_2 and the influencing factors were studied by using methylene blue(MB)dyes as the target pollutants.The results showed that the optimum molar ratio of PPy/TiO_2 was 10∶1,and the optimum dosage was 1.5 g/L.The improvement of reaction temperature was beneficial to the improvement of photocatalytic efficiency,but the effect on adsorption was small.MB removal efficiency was 99.1%after 30 minutes adsorption and 3 hUV photocatalytic treatment.PPy/TiO_2 had high removal rates for both MB and MG.UV photocatalytic degradation of MB was consistent with the Langmuir-Hinshelwood kinetic model.MB removal rate was still up to 92.7% when cycling 20 times,indicating that PPy/TiO_2 microspheres had strong cycle stability and application potential.
Hydrochloric acid used as an inorganic acid,PPy/TiO_2 composite microspheres with different molar ratio were prepared by in situ polymerization.The adsorption of PPy/TiO_2 and the influencing factors were studied by using methylene blue(MB)dyes as the target pollutants.The results showed that the optimum molar ratio of PPy/TiO_2 was 10∶1,and the optimum dosage was 1.5 g/L.The improvement of reaction temperature was beneficial to the improvement of photocatalytic efficiency,but the effect on adsorption was small.MB removal efficiency was 99.1%after 30 minutes adsorption and 3 hUV photocatalytic treatment.PPy/TiO_2 had high removal rates for both MB and MG.UV photocatalytic degradation of MB was consistent with the Langmuir-Hinshelwood kinetic model.MB removal rate was still up to 92.7% when cycling 20 times,indicating that PPy/TiO_2 microspheres had strong cycle stability and application potential.
引文
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[22]李大军,贺惠,王庆龙,等.TiO2/改性硅藻土对LAS废水CODCr的降解性能[J].化工新型材料,2017,45(5):250-252.
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[24]张永德.铀及伴生重金属生物质吸附新材料的制备与应用研究[D].北京:北京有色金属研究总院,2016.
[25]赵姝琦,欧晓霞.壳聚糖吸附印染废水中结晶紫效果的研究[J].环境科学与管理,2013,38(6):124-127.
[2]Khalfaoui-Boutoumi N,Boutoumi H,Khalaf H,et al.Synthesis and characterization of TiO2-Montmorillonite/Polythiophene-SDS nanocomposites:application in the sonophotocatalytic degradation of rhodamine 6G[J].Applied Clay Science,2013,80-81(8):56-62.
[3]Futane R S,Raut V M,Dhande S D.Synthesis and haracterization of polythiophene and TiO2doped polythiophene thin films by chemical bath deposition[J].Rasayan Journal of Chemistry,2016,9(4):842-848.
[4]Das R,Giri S,Muliwa A M,et al.High-performance Hg(Ⅱ)removal using thiol-functionalized polypyrrole(PPy/MAA)composite and effective catalytic activity of Hg(Ⅱ)adsorbed waste material[J].ACS Sustainable Chemistry&Engineering,2017,5(9):7524-7596.
[5]Moosvi S K,Shah K M,Ara T.Study of thermal,electrical and photocatalytic activity of Iron complex doped polypyrrole and polythiophene nanocomposites[J].Industrial&Engineering Chemistry Research,2017,56(15):4245-4257.
[6]蒋裕平.TiO2在不同pH值和高盐度溶液中的吸附和光催化作用研究[D].广州:华南理工大学,2013:1-3.
[7]Jiang L,Lu X,Xie C,et al.Flexible,free-standing TiO2-graphene-polypyrrole composite films as electrodes for supercapacitors[J].Journal of Physical Chemistry C,2015,119(8):3903-3910.
[8]任学昌,念娟妮,王雪姣,等.TiO2/PPY/Fe3O4的水热法制备及其光催化与磁回收性能[J].中国环境科学,2012,32(5):863-868.
[9]张清爽,李巧玲,陈海利,等.静止原位复合法制备聚吡咯/TiO2纸及其催化性能[J].化学学报,2011,69(17):2009-2014.
[10]赵娜,李轶文,刘彦明,等.TiO2/PPy复合导电微球的制备[J].大连工业大学学报,2015,34(4):271-274.
[11]冯江涛,李晶晶,徐浩,等.不同无机酸对聚吡咯/TiO2复合物的吸附性能影响[J].化工进展,2016,35(S1):294-303.
[12]赵云,朱文,张丽丽,等.TiO2-聚吡咯纳米复合材料的电化学制备及其在锂硫电池中的应用[J].材料导报,2016,30(20):7-11.
[13]燕群,李传宪,杨飞.电化学合成聚吡咯-二氧化钛复合膜及其防腐蚀性能[J].材料保护,2016,49(6):26-30;6.
[14]苏洁,程文,周汉波,等.新型磁性离子交换吸附TiO2@Fe3O4/聚吡咯树脂复合材料制备及其吸附性能[J].复合材料学报,2017,34(2):231-239.
[15]Dimitrijevic N M,Tepavcevic S,Liu Y,et al.Nanostructured TiO2/polypyrrole for visible light photocatalysis[J].J Phys Chem C,2013,117(30):15540-15544.
[16]Barkade S S,Pinjari D V,Singh A K,et al.Ultrasound assisted miniemulsion polymerization for preparation of polypyrrolezinc oxide(PPy/ZnO)functional latex for liquefied petroleum gas sensing[J].Industrial&Engineering Chemistry Research,2013,52(23):7704-7712.
[17]Ngaboyamahina E,Debiemmechouvy C,Pailleret A,et al.Electrodeposition of polypyrrole in TiO2nanotube arrays by pulsed-light and pulsed-potential methods[J].Journal of Physical Chemistry C,2014,118(45):26341-26350.
[18]Ma X,Ni X.Copolymerization of EDOT with pyrrole on TiO2semiconductor films by one-step reaction,structure-dependent electronic properties,and charge conduction models of the composite films[J].Langmuir the ACS Journal of Surfaces&Colloids,2014,30(8):2241-2248.
[19]Babatunde A O,Hao Y Q.Equilibrium and kinetic analysis of phosphorus adsorption from aqueous solution using waste alum sludge[J].Journal of Hazardous Materials,2010,184(1/2/3):746-752.
[20]Monteiro S N,Alexandre J,Margem J I,et al.Incorporation of sludge waste from water treatment plant into red ceramic[J].Construction and Building Materials,2008,22(6):1281-1287.
[21]汤小胜.水体中几种污染物的吸附及高级氧化技术降解的研究[D].武汉:中国地质大学,2015:1-5.
[22]李大军,贺惠,王庆龙,等.TiO2/改性硅藻土对LAS废水CODCr的降解性能[J].化工新型材料,2017,45(5):250-252.
[23]苏伟.多孔SiO2凝胶对放射性废液中锕系核素的分离、固化特性研究[D].北京:中国工程物理研究院,2011.
[24]张永德.铀及伴生重金属生物质吸附新材料的制备与应用研究[D].北京:北京有色金属研究总院,2016.
[25]赵姝琦,欧晓霞.壳聚糖吸附印染废水中结晶紫效果的研究[J].环境科学与管理,2013,38(6):124-127.