超声协同微球型Bi_2O_2CO_3降解罗丹明B的研究
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摘要
Bi_2O_2CO_3是一种Bi类半导体催化剂,文章研究了它的超声催化性能。首先,采用水热法制备了微球型的Bi_2O_2CO_3,利用X射线衍射(X-ray Diffraction, XRD)、扫描电子显微镜(Scanning Electron Microscope, SEM)、紫外-可见漫反射光谱对样品的晶体结构、微观形貌、光学特性进行了表征。然后,以罗丹明B(Rh B)作为模型污染物,通过研究超声催化降解罗丹明B来评测Bi_2O_2CO_3的超声催化性能。研究了催化剂的浓度(Ccatalytic)、初始罗丹明B染料的浓度(CRhB)和超声功率(P)等实验因素对超声催化降解效率的影响。得出在Ccatalytic=3 g·L-1,CRhB=10 mg·L-1和P=400 W条件下降解罗丹明B的效率最高,其最高降解效率可以达到91.7%。
Bi_2O_2CO_3 is a kind of Bi semiconductor catalyst,in this paper,the sonocatalytic performance of Bi_2O_2CO_3 is studied.The Bi_2O_2CO_3 particles are synthesized by the hydrothermal method,and their crystal structures,morphologies and optical properties are characterized by X-ray diffraction(XRD),scanning electron microscope(SEM) and ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS).Then,by taking Rhodamine B(RhB) as a model pollutant,the sonocatalytic performance of Bi_2O_2CO_3 is evaluated in terms of the degradation of Rhodamine B under ultrasonic irradiation.The effects of various experimental factors,such as catalyst dosage(Ccatalytic),initial RhB concentration(CRhB)and ultrasonic power(P),on the efficiency of sonocatalysis degradation are investigated.The optimum conditions for sonocatalytic degradation of Rhodamine B are:Ccatalytic = 3 g·L-1,CRhB = 10 mg·L-1 and P = 400 W.The percentage degradation of Rhodamine B after 90 minutes of sonocatalysis is 91.7%.
Bi_2O_2CO_3 is a kind of Bi semiconductor catalyst,in this paper,the sonocatalytic performance of Bi_2O_2CO_3 is studied.The Bi_2O_2CO_3 particles are synthesized by the hydrothermal method,and their crystal structures,morphologies and optical properties are characterized by X-ray diffraction(XRD),scanning electron microscope(SEM) and ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS).Then,by taking Rhodamine B(RhB) as a model pollutant,the sonocatalytic performance of Bi_2O_2CO_3 is evaluated in terms of the degradation of Rhodamine B under ultrasonic irradiation.The effects of various experimental factors,such as catalyst dosage(Ccatalytic),initial RhB concentration(CRhB)and ultrasonic power(P),on the efficiency of sonocatalysis degradation are investigated.The optimum conditions for sonocatalytic degradation of Rhodamine B are:Ccatalytic = 3 g·L-1,CRhB = 10 mg·L-1 and P = 400 W.The percentage degradation of Rhodamine B after 90 minutes of sonocatalysis is 91.7%.
引文
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[2]NEPPOLIAN B,CHOI H C,SAKTHIVEL S,et al.Solar light induced and TiO2 assisted degradation of textile dye reactive blue4[J].Chemosphere,2002,46(8):1173-1181.
[3]AN T C,ZHU X H,XIONG Y.Feasibility study of photoelectrochemical degradation of methylene blue with three-dimensional electrode-photocatalytic reactor[J].Chemosphere,2002,46(6):897-903.
[4]MEROUANI S,HAMDAOUI O,SAOUDI F,et al.Sonochemical degradation of Rhodamine B in aqueous phase:effects of additives[J].Chemical Engineering Journal,2010,158(3):550-557.
[5]AND I H,HOFFMANN M R.Optimization of ultrasonic irradiation as an advanced oxidation technology[J].Environmental Science&Technology,1997,31(8):2237-2243.
[6]SANGAVE P C,PANDIT A B.Ultrasound pre-treatment for enhanced biodegradability of the distillery wastewater[J].Ultrasonics Sonochemistry,2004,11(3-4):197-203.
[7]SUSLICK K S.Sonochemistry[J].Science,1990,247(4949):1439-1445.
[8]DIDENKO Y T,SUSLICK K S.The energy efficiency of formation of photons,radicals and ions during single-bubble cavitation[J].Nature,2002,418(6896):394-397.
[9]STOREY B D,SZERI A J.Water vapour,sonoluminescence and sonochemistry[J].Proceedings Mathematical Physical&Engineering Sciences,2000,456(1999):1685-1709.
[10]TAGHIZADEH M T,MEHRDAD A.Calculation of the rate constant for the ultrasonic degradation of aqueous solutions of polyvinyl alcohol by viscometry.[J].Ultrasonics Sonochemistry,2003,10(6):309-313.
[11]PANG Y L,ABDULLAH A Z,BHATIA S.Effect of annealing temperature on the characteristics,sonocatalytic activity and reusability of nanotubes TiO2,in the degradation of Rhodamine B[J].Applied Catalysis B Environmental,2010,100(1-2):393-402.
[12]WANG J,GUO B,ZHANG X,et al.Sonocatalytic degradation of methyl orange in the presence of TiO2 catalysts and catalytic activity comparison of rutile and anatase[J].Ultrasonics Sonochemistry,2005,12(5):331-337.
[13]SEKIGUCHI H,SAITA Y.Effect of alumina particles on sonolysis degradation of chlorobenzene in aqueous solution[J].Journal of Chemical Engineering of Japan,2002,34(8):1045-1048.
[14]TUZIUTI T,YASUI K,SIVAKUMAR M,et al.Correlation between acoustic cavitation noise and yield enhancement of sonochemical reaction by particle addition[J].Journal of Physical Chemistry A,2005,109(21):4869-4872.
[15]ZHAO T,ZAI J,XU M,et al.Hierarchical Bi2O2CO3 microspheres with improved visible-light-driven photocatalytic activity[J].Crystengcomm,2011,13(12):4010-4017.
[16]ZHU G Q,LIU Y B,HOJAMBERDIEV M,et al.Thermodecomposition synthesis of porousβ-Bi2O3/Bi2O2CO3 heterostructured photocatalysts with improved visible light photocatalytic activity[J].New Journal of Chemistry,2015,39(12):9557-9568.
[17]SAHOO P P,MAGGARD P A.Crystal chemistry,band engineering,and photocatalytic activity of the LiNb3O8-CuNb3O8 solid solution[J].Inorganic Chemistry,2013,52(8):4443-4450.
[18]WANG J,JIANG Z,ZHANG Z,et al.Study on inorganic oxidants assisted sonocatalytic degradation of Acid Red B in presence of nano-sized ZnO powder[J].Separation&Purification Technology,2009,67(1):38-43.
[19]PANG Y L,ABDULLAH A Z.Fe3+,doped TiO2,nanotubes for combined adsorption-sonocatalytic degradation of real textile wastewater[J].Applied Catalysis B Environmental,2013,129(3):473-481.
[20]WANG J,JIANG Z,ZHANG Z,et al.Sonocatalytic degradation of acid red B and rhodamine B catalyzed by nano-sized ZnO powder under ultrasonic irradiation[J].Ultrasonics Sonochemistry,2008,15(5):768-774.
[21]SIVAKUMAR M,PANDIT A B.Ultrasound enhanced degradation of Rhodamine B:optimization with power density[J].Ultrasonics Sonochemistry,2001,8(3):233-240.