聚苯胺改性活性炭粒子电极的光电催化性能
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摘要
以苯胺、活性炭为原料,利用原位聚合法制备聚苯胺(PANI)改性活性炭(AC)粒子电极(PANI/AC),采用扫描电子显微镜(SEM)、透射电镜(TEM)、X射线衍射仪(XRD)和红外光谱(FTIR)对该粒子电极的形貌、晶体结构和组成进行了表征,并将其应用于直接耐晒翠蓝GB的光电催化降解实验。考察了PANI复合量、粒子电极用量、电流密度、pH和GB初始浓度等对降解率的影响,并考察了GB在不同催化条件下的降解反应。结果表明:在光电协同催化条件下,当苯胺与活性炭质量比为0.3∶0.7,粒子电极质量浓度为9 g/L,电流密度为8 mA/cm2,pH为3时,PANI/AC对质量浓度为20 mg/L的GB溶液的降解率达到95.47%。
An polyaniline(PANI) modified activated carbon(AC) particle electrode(PANI/AC) was prepared by in-situ polymerization method.The morphology,crystal structure and composition of the particle electrode were studied by scanning electron microscope(SEM),transmission electron microscope(TEM),X-ray diffraction(XRD) and Fourier transform infrared spectroscopy(FTIR).And then it was applied to the photoelectrocatalytic degradation experiment of direct light turquoise blue GB.The factors affecting the degradation rate of GB,such as PANI amount,particle electrode dosage,current density,pH value,and initial concentration of GB were investigated.In addition,the degradation of GB under different catalytic conditions was studied.The results showed that under the synergistic effect of photocatalysis and electrocatalysis,when the mass ratio of aniline to activated carbon was 0.3:0.7,the mass concentration of particle electrode was 9 g/L,the current density was 8 mA/cm2,and the pH was 3,the degradationrate of GB with a mass concentration of 20 mg/L reached 95.47%.
An polyaniline(PANI) modified activated carbon(AC) particle electrode(PANI/AC) was prepared by in-situ polymerization method.The morphology,crystal structure and composition of the particle electrode were studied by scanning electron microscope(SEM),transmission electron microscope(TEM),X-ray diffraction(XRD) and Fourier transform infrared spectroscopy(FTIR).And then it was applied to the photoelectrocatalytic degradation experiment of direct light turquoise blue GB.The factors affecting the degradation rate of GB,such as PANI amount,particle electrode dosage,current density,pH value,and initial concentration of GB were investigated.In addition,the degradation of GB under different catalytic conditions was studied.The results showed that under the synergistic effect of photocatalysis and electrocatalysis,when the mass ratio of aniline to activated carbon was 0.3:0.7,the mass concentration of particle electrode was 9 g/L,the current density was 8 mA/cm2,and the pH was 3,the degradationrate of GB with a mass concentration of 20 mg/L reached 95.47%.
引文
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[2]Fan Guangping(樊广萍),Xie Jiangkun(谢江坤),Li Mu(李睦),et al.Applied research of electrochemical oxidation technologies in wastewater treatment[J].Water Purification Technology(净水技术),2016,35(6):30-36.
[3]Lv G F,Wu D C,Fu R W.Performance of carbon aerogels particle electrodes for the aqueous phase electrocatalytic oxidation of simulated phenol wastewaters[J].Journal of Hazardous Materials,2009,165(1/2/3):961-966.
[4]Chen Y,Shi W,Xue H M,et al.Enhanced electrochemical degradation of dinitrotoluene wastewater by Sn-Sb-Ag-modified ceramic particulates[J].Electrochimica Acta,2011,58(1):383-388.
[5]He Wanping(何万萍),Meng Yong(孟勇).Preparation and properties of ceramic-carbon composite particle electrode for three-dimensional electrocatalytic treatment of organic wastewater[J].Fine Chemical Intermediates(精细化工中间体),2017,47(3):39-42.
[6]Xie Hongduan(解宏端),Yang Yutong(杨雨桐),Shan Danying(单丹滢),et al.Degradation of hodamine B by ultraviolet combined electro-catalysis with CuO-TiO2/Al2O3 three-dimensional particle electrode[J].Environmental Protection of Chemical Industry(化工环保),2017,37(2):172-177.
[7]Zhao H Z,Sun Y,Xu L N,et al.Removal of Acid Orange 7 in simulated wastewater using a three-dimensional electrode reactor:Removal mechanisms and dye degradation pathway[J].Chemosphere,2010,78(1):46-51.
[8]Zhou Dan(周丹),Yu Jian(余健),Tang Hao(唐浩),et al.Photoelectrocatalytic degradation of rhodamine B by CoFe2O4/TiO2/flake graphite particle electrode[J].Chinese Journal of Environmental Engineering(环境工程学报),2016,10(10):5503-5510.
[9]Scanlon D O,Dunnill C W,Buckeridge J,et al.Band alignment of rutile and anatase TiO2[J].Nature Materials,2013,12:798-801.
[10]Kapilashrami M,Zhang Y,Liu Y S,et al.Probing the optical property and electronic structure of TiO2 nanomaterials for renewable energy applications[J].Chemical Reviews,2014,114(19):9662-9707.
[11]Reyes C D,Rodríguez G G,Espinosa P M E,et al.Phase-pure TiO2nanoparticles:Anatase,brookite and rutile[J].Nanotechnology,2008,19(14):145605-145615.
[12]Wang D,Zhou Z H,Yang H,et al.Preparation of TiO2 loaded with crystalline nano Ag by a one-step low-temperature hydrothermal method[J].Journal of Materials Chemistry,2012,22(32):16306-16311.
[13]Liang Yanping(梁燕萍),Jia Jianping(贾剑平),Shi Qizhen(史启祯),et al.The photocatalytic properties and electrochemical impedance spectroscopy of Co2+doped TiO2 thin film[J].Chinese JInorg Chem(无机化学学报),2010,26(4):633-638.
[14]Zare M,Mortezaali A,Shafiekhani A.Photoelectrochemical determination of shallow and deep trap states of platinum-decorated TiO2 nanotube arrays for photocatalytic applications[J].Journal of Physical Chemistry C,2016,120(17):9017-9027.
[15]Hosseini M G,Momeni M M.Platinum nanoparticle-decorated TiO2,nanotube arrays as new highly active and non-poisoning catalyst for photoelectrochemical oxidation of galactose[J].Applied Catalysis AGeneral,2012,427-428(10):35-42.
[16]Chu Daobao(褚道葆),Chen Zhongping(陈忠平),Wu Hezhen(吴何珍),et al.Preparation and electrochemical properties of carbon nanotube/nanocrystalline TiO2-polyaniline complex film electrode[J].CIESC Journal(化工学报),2007,58(6):1568-1574.
[17]Huang Huaiguo(黄怀国),Zheng Zhixin(郑志新),Luo Jin(罗瑾),et al.The photoelectrochemistry of TiO2-polyaniline composite film[J].Electrochemistry(电化学),2001,7(1):102-108.
[18]Yang Chuanxi(杨传玺),Wang Weiliang(王炜亮),Dong Wenping(董文平),et al.Oxidation mechanism and synergetic-photosensitization effect of visible-light-induced PANI/TiO2 and PoPD/TiO2 nanocomposites[J].Environmental Chemistry(环境化学),2016,35(1):102-111.
[19]Yang Jianli(杨建利),Du Meili(杜美利),Yu Chunxia(于春侠),et al.Preparation of activated carbon/polyaniline composites and study on adsorption properties[J].Applied Chemical Industry(应用化工),2017,46(6):1234-1236.
[20]Jing Xiabin(景遐斌),Wang Lixiang(王利祥),Wang Xianhong(王献红),et al.Synthesis,structure,properties and applications of conducting polyaniline[J].Acta Polymerica Sinica(高分子学报),2005,12(5):655-663.
[21]Cheng Chuanlin(程传麟),Xia Tianming(夏天明),Qin Fang(秦芳),et al.Study on preparation of composite particles of rectorite and adsorption performance[J].Journal of Wuhan Institute of Technology(武汉工程大学学报),2011,33(9):61-63,67.
[22]Wei Yijun(魏亦军),Chu Daobao(褚道葆),Yao Wenli(姚文俐).Preparation and electrochemical behavior of complex film of nanocrystalline Ti O2/polyaniline[J].Chinese Journal of Synthetic Chemistry(合成化学),2004,12(1):69-72.
[23]Huang Lihua(黄丽华),Zhao Feng(赵峰),Chen Jianmin(陈建民).Studies on the photodegradation of direct blue on nanosized titania[J].Environmental Chemistry(环境化学),2003,22(4):359-363.
[24]Huang Hui(黄惠),Zhou Jiyu(周继禹),Xu Jinquan(许金泉),et al.Study of compound oxidanton on synthesis of conducting polyaniline[J].Applied Chemical Industry(应用化工),2008,37(10):1143-1146.
[25]Duan F,Zhang Q H,Shi D J,et al.Enhanced visible light photocatalytic activity of Bi2WO6 via modification with polypyrrole[J].Applied Surface Science,2013,268(1):129-135.
[26]Ghosh S,KouaméN A,Ramos L,et al.Conducting polymer nanostructures for photocatalysis under visible light[J].Nature Materials,2015,14(5):505-511.
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