不同形貌钛酸钡纳米晶体的光催化性能研究
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摘要
采用水热法,分别利用聚乙二醇200(PEG200)和乙醇的调控作用,合成了十二面体和立方块两种不同形貌的钛酸钡(BaTiO_3,BTO)纳米晶体,两种晶体分别具有(110)和(100)不同的晶面。利用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)以及UV-Vis漫反射光谱对BTO纳米晶体进行表征分析,结果显示十二面体BTO纳米晶体具有较小的粒径,较大的表面活性;而立方块BTO纳米晶体具有较大的粒径,较小的表面活性。在相同条件下对甲基橙进行光催化降解实验,十二面体BTO纳米晶体显示出优于立方块BTO纳米晶体的催化性能。光催化动力学理论模拟结果进一步证实了上述实验结果。
Dodecahedral and cubic barium titanate( BaTiO_3,BTO) nanocrystals with two different morphologies were synthesized by hydrothermal method using polyethylene glycol 200( PEG200) and ethanol respectively. The two kinds of nanocrystals have( 110) and( 100) different crystal planes. BTO nanocrystals were characterized by X-ray diffraction( XRD),scanning electron microscopy( SEM),transmission electron microscopy( TEM) and UV-Vis diffuse reflectance spectroscopy. The results show that dodecahedral BTO nanocrystals have smaller particle size and larger surface activity,while cubic BTO nanocrystals have larger particle size and small surface activity. The photocatalytic degradation of methyl orange under the same conditions show that dodecahedral BTO nanocrystals exhibit better catalytic performance than cubic BTO nanocrystals. The theoretical simulation results of photocatalytic dynamics further confirm the above experimental results.
Dodecahedral and cubic barium titanate( BaTiO_3,BTO) nanocrystals with two different morphologies were synthesized by hydrothermal method using polyethylene glycol 200( PEG200) and ethanol respectively. The two kinds of nanocrystals have( 110) and( 100) different crystal planes. BTO nanocrystals were characterized by X-ray diffraction( XRD),scanning electron microscopy( SEM),transmission electron microscopy( TEM) and UV-Vis diffuse reflectance spectroscopy. The results show that dodecahedral BTO nanocrystals have smaller particle size and larger surface activity,while cubic BTO nanocrystals have larger particle size and small surface activity. The photocatalytic degradation of methyl orange under the same conditions show that dodecahedral BTO nanocrystals exhibit better catalytic performance than cubic BTO nanocrystals. The theoretical simulation results of photocatalytic dynamics further confirm the above experimental results.
引文
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[2]Xu X L,Xiao L B,Jia Y M,et al.Pyro-catalytic Hydrogen Evolution by Ba0.7Sr0.3Ti O3Nanoparticles:Harvesting Cold-hot Alternation Energy Near Room-temperature[J].Energy&Environmental Science,2018,5:127-136.
[3]Hou Z W,Kang A G,Ma W Q,et al.Dimension Effects on the Dielectric Properties of Fine BaTiO3Ceramics[J].Chinese Physics B,2014,23(11):1177011-1177014.
[4]杨晓磊,卢亚平,高玫香,等.Gelatin/BaTiO3核壳复合粒子的制备及电场响应性能研究[J].无机材料学报,2016,31(12):1306-1310.
[5]Zhan H Q,Jiang X P,Zhu M X,et al.Photoluminescence Activity of BaTiO3Nanocrystals Dependence on the Structural Evolution[J].Journal of Crystal Growth,2016,433:80-85.
[6]赵勇,刘晓林,窦晓亮,等.多孔BaTiO3的制备及多孔BaTiO3/PVDF复合材料性能研究[J].人工晶体学报,2015,44(11):3035-3039.
[7]Wu Q S,Liu J W,Yu S H,et al.A Surfactant-free Route to Synthesize BaxSr1-xTi O3Nanoparticles at Room Temperature,Their Dielectric and Microwave Absorption Properties[J].Science China Materials,2016,59(8):609-617.
[8]展红全,江向平,陈超,等.四方相钛酸钡纳米枝晶阵列的水热合成[J].无机化学学报,2011,27(10):1938-1944.
[9]陈杰,闫峰,罗昆鹏.微波水热合成钛酸钡纳米粉体[J].人工晶体学报,2013,42(11):2059-2063.
[10]Li H D,Sang Y H,Wang Z L,et al.Enhanced Ferroelectric-nanocrystal-based Hybrid Photocatalysis by Ultrasonic-wave-generated Piezophototronic Effect[J].Nano Letters,2015,15(4):2372-2379.
[11]Yang W G,Yu Y H,Wang X D,et al.Ferroelectric Polarization-Enhanced Photoelectrochemical Water Splitting in Ti O2-BaTiO3Core-Shell Nanowire Photoanodes[J].Nano Letters,2015,15(11):7574-7580.
[12]Wu J,Xu Q,Bao D H,et al.Insights into the Role of Ferroelectric Polarization in Piezocatalysis of Nanocrystalline BaTiO3[J].ACS Appl Mater Interfaces,2018,10(21):17842-17849.
[13]Toupin J,Strub H,Kressmann S,et al.Engineering n-p Junction for Photo-electrochemical Hydrogen Production[J].Phys.Chem.Chem.Phys.,2017,19(45):30675-30682.
[14]李跃军,曹铁平,梅泽民.异质结型BaTiO3/Ti O2复合纳米纤维的制备及光催化性能[J].无机材料学报,2014,29(7):741-746.
[15]林雪,关庆丰,李海波,等.掺镁钛酸钡纳米棒的水热合成和光催化性能[J].无机化学学报,2012,28(10):2248-2256.
[16]县涛,邸丽景,马俊,等.Au改性BaTiO3纳米颗粒在模拟太阳光照射下的光催化降解性能[J].材料研究学报,2017,31(2):102-109.
[17]Joshi S,Balasubramanyam R K C,Ippolito S J,et al.Straddled Band Aligned CuO/BaTiO3Heterostructures:Role of Energetics at Nanointerface in Improving Photocatalytic and CO2Sensing Performance[J].ACS Applied Nano Materials,2018,1(7):3375-3388.
[18]Joshi S,Ippolito S J,Periasamy S,et al.Efficient Heterostructures of Ag@CuO/BaTiO3for Low-temperature CO2Gas Detection:Assessing the Role of Nanointerfaces during Sensing by Operando DRIFTS Technique[J].ACS Appl Mater Interfaces,2017,9(32):27014-27026.
[19]Beh E S,Basun S A,Feng X F,et al.Molecular Catalysis at Polarized Interfaces Created by Ferroelectric BaTiO3[J].Chemical Science,2017,8(4):2790-2794.
[20]Li J,Zhang G H,Han S F,et al.Enhanced Solar Absorption and Visible-light Photocatalytic and Photoelectrochemical Properties of Aluminiumreduced BaTiO3Nanoparticles[J].Chemical Communcations,2018,54(7):723-726.
[21]Devi L G,Nithya P M.Photocatalytic Activity of Hemin(Fe(iii)porphyrin)Anchored BaTiO3under the Illumination of Visible Light:Synergetic Effects of Photosensitization,Photo-Fenton&Photocatalysis Processes[J].Inorganic Chemistry Frontiers,2018,5(1):127-138.
[22]Huang K K,Yuan L,Feng S H.Crystal Facet Tailoring Arts in Perovskite Oxides[J].Inorganic Chemistry Frontiers,2015,2(11):965-981.
[23]Chen C K,Zhao S X,Nan C W,et al.Topochemical Synthesis and Photocatalytic Activity of 3D Hierarchical BaTiO3Microspheres Constructed from Crystal-axis-oriented Nanosheets[J].Dalton Transactions,2017,46(15):5017-5024.
[24]Ni Y H,Zheng H S,Hong J M,et al.Simple Hydrothermal Synthesis and Photocatalytic Performance of Coral-like BaTiO3Nanostructures[J].RSC Advances,2015,5(10):7245-7252.
[25]Zhan H Q,Yang X F,Zhou W Z,et al.Multiple Nucleation and Crystal Growth of Barium Titanate[J].Crystal Growth&Design,2012,12(3):1247-1253.
[26]展红全,江向平,李月明,等.钛酸钡纳米颗粒聚集球的形成机理[J].物理化学学报,2011,27(12):2927-2932.
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