非化学计量比Ce_xZr_yO_2纳米复合材料的可控合成及其光催化性能研究
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摘要
以硝酸铈和硝酸锆为前驱物,采用水热合成法成功合成了纳米复合材料Ce_xZr_yO_2,在汞灯光照射下评价了其对亚甲蓝(MB)的非均相光催化降解活性;与单纯的CeO_2及ZrO_2纳米材料比较发现,Ce_xZr_yO_2对MB的光催化降解效果有显著改善.当铈与锆的摩尔比为9∶1时,Ce_(0.9)Zr_(0.1)O_2纳米复合材料对MB的光降解效率最高,比未复合的纳米催化剂高约2倍.
The Ce_xZr_yO_2 nanocomposites were successfully synthesized by hydrothermal method using cerium nitrate and zirconium nitrate as precursors.Their heterogeneous photocatalytic activities for the degradation of methylene blue(MB)were evaluated under mercury lamp irradiation.Compared with pure CeO_2 or ZrO_2 nanomaterials,the photocatalytic degradation of MB by Ce_xZr_yO_2 was significantly improved.When the molar ratio of cerium to zirconium is 9:1,the photocatalytic efficiency of Ce_(0.9)Zr_(0.1)O_2 for MB degradation is the highest,which is about two times higher than that of uncompleted nanocatalysts.
The Ce_xZr_yO_2 nanocomposites were successfully synthesized by hydrothermal method using cerium nitrate and zirconium nitrate as precursors.Their heterogeneous photocatalytic activities for the degradation of methylene blue(MB)were evaluated under mercury lamp irradiation.Compared with pure CeO_2 or ZrO_2 nanomaterials,the photocatalytic degradation of MB by Ce_xZr_yO_2 was significantly improved.When the molar ratio of cerium to zirconium is 9:1,the photocatalytic efficiency of Ce_(0.9)Zr_(0.1)O_2 for MB degradation is the highest,which is about two times higher than that of uncompleted nanocatalysts.
引文
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[4]Robinson T,McMullan G,Marchant R,et al.Remediation of dyes in textile effluent:a critical review on current treatment technologies with a proposed alternative[J].Bioresource Technol,2001,77:247-255.
[5]吉亮亮,同帜,马敏敏,等.钨酸铋基光催化材料的研究进展[J].山东化工,2018,47:43-51.
[6]聂龙辉,黄征青,徐洪涛,等.Ag@AgBr光催化剂的制备及其可见光催化降解亚甲基蓝反应性能[J].催化学报,2012,33:1209-1216.
[7]Chen L,He J,Liu Y,et al.Recent advances in bismuth containing photocatalysts with heterojunctions[J].Chinese J Catal,2016,37:780-791.
[8]Cheng M,Zeng G,Huang D,et al.Hydroxyl radicals based advanced oxidation processes(AOPs)for remediation of soils contaminated with organic compounds:a review[J].Chem Eng J,2016,284:582-598.
[9]Ge M,Cao C,Huang J,et al.A review of one-dimensional TiO2nanostructured materials for environmental and energy applications[J].JMater Chem A,2016,4:6772-6801.
[10]Liu C,Kong D,Hsu P C,et al.Rapid water disinfection using vertically aligned MoS2 nanofilms and visible light[J].Nature Nanotechnology,2016,11:1098-1104.
[11]Shannon M A,Bohn P W,Elimelech M,et al.Science and technology for water purification in the coming decades[J].Nanoscience and Technology,2008,454:301-310.
[12]AbdelMessih M F,Ahmed M A,Soltan A,et al.Facile approach for homogeneous dispersion of metallic silver nanoparticles on the surface of mesoporous titania for photocatalytic degradation of methylene blue and indigo carmine dyes[J].J Photoch Photobio A,2017,335:40-51.
[13]Augugliaro V,Bellardita M,Loddo V,et al.Overview on oxidation mechanisms of organic compounds by TiO2 in heterogeneous photocatalysis[J].J Photoch Photobio C,2012,13:224-245.
[14]Abdelwahab N A,Morsy E M H.Synthesis and characterization of methyl pyrazolone functionalized magnetic chitosan composite for visible light photocatalytic degradation of methylene blue[J].Int J Bio Macromol,2017,108:1035-1044.
[15]Ma L L,Yang C,Tian X K,et al.Enhanced usage of visible light by BiSex for photocatalytic degradation of methylene blue in water via the tunable band gap and energy band position[J].J Clean Prod,2018,171:538-547.
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[17]Ahmed M A,AbdelMessih M F,El-Sherbeny E F,et al.Synthesis of metallic silver nanoparticles decorated mesoporous SnO2for removal of methylene blue dye by coupling adsorption and photocatalytic processes[J].J Photoch Photobio A,2017,346:77-88.
[18]Alvi M A,Al-Ghamdi A A,Shaheer A M.Synthesis of ZnO nanostructures via low temperature solution process for photocatalytic degradation of rhodamine B dye[J].Mater Lett,2017,204:12-15.
[19]Zhang X H,Wang Q,Zhang J,et al.One step hydrothermal synthesis of CeO2-ZrO2nanocomposites and investigation of the morphological evolution[J].RSC Adv,2015,109:89976-89984.
[20]吴淑娜,蒋燕,陈清华,等.TiO2纳米带制备及光催化降解气相甲苯研究[J].环境科学与技术,2018,41(9):12-16.
[21]Ma L N,Wang G H,Jiang C J,et al.Synthesis of core-shell TiO2@g-C3N4hollow microspheres for efficient photocatalytic degradation of rhodamine B under visible light[J].Appl Surf Sci,2018,430:263-272.
[22]Ligia F,Lucian D,Irina Z,et al.Photocatalytic activity of wool fabrics deposited at low temperature with ZnO or TiO2nanoparticles:methylene blue degradation as a test reaction[J].Catal Today,2017,306:251-259.
[23]李杰.TiO2纳米管/蒙脱土复合材料的制备及其光催化性能研究[J].太原学院学报(自然科学版),2018,36(3):65-68.
[24]Fu H B,Pan C S,Yao W Q,et al.Visible-light-induced degradation of rhodamine B by nanosized Bi2WO6[J].J Phys Chem B,2005,109:22432-22439.
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[26]Yuan Z C,Lan Y,Chen S Y.Preparation of magnetically recyclable paly gorskite Fe-octa carboxylic acid phthalocyanine nano-composites and their photocatalytic behavior for degradation of Rhodamine B[J].Appl Clay Sci,2017,147:153-159.
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