氧化锌作为一种优异的半导体材料,在材料研究领域受到广泛关注。采用简单的湿化学法合成氧化锌材料,通过X射线衍射图观测到合成的氧化锌样品纯度高且没有第二相,在NaBH4的作用下,氧化锌的形貌以及内部结构发生了改变。带隙能量值从3.28eV降低到3.07eV,并通过拉曼光谱,X射线光电子能谱进一步验证,与纯氧化锌相比,经处理后的氧化锌,氧空位有所增加,揭示了NaBH4对氧化锌缺陷结构的影响。
As an excellent semiconductor material,zinc oxide has received extensive attention in the field of materials research.The zinc oxide material was synthesized by a simple wet chemical method.Through the X-ray diffraction pattern,it was observed that the sample had high purity and no second phase appeared.Under the influence of sodium borohydride(NaBH4),the morphology and internal structure of zinc oxide were changed.The band gap energy value was reduced from 3.28eV to 3.07eV.This change was further verified by Raman spectroscopy and X-ray photoelectron spectroscopy.Compared with pure zinc oxide,zinc oxide treated with NaBH4 increased oxygen vacancies.This study revealed the influence of NaBH4 on the structure of zinc oxide defects.
[1] 戴军,陈景东,何影记,等.铜掺杂氧化锌纳米棒的非线性光学响应竞争特性[J].发光学报,2017,38(7):855-861.
[2] Danilenko I,Gorban O,Maksimchuk P,et al.Photocatalytic activity of ZnO nanopowders:the role of production techniques in the formation of structural defects[J].Catalysis Today,2019,328:99-104.
[3] 陈梅.氧化锌纳米结构调控与气体敏感性能关联构建[D].北京:北京化工大学,2012.
[4] Janotti A,Van de Walle C G.Native point defects in ZnO[J].Physical Review B,2007,76(16):165202.
[5] 彭慧琼,谢长生,朱强,等.缺陷调控对氧化锌纳米棒阵列光电响应与恢复性能的影响[J].功能材料,2017,48(7):7154-7158.
[6] Zhang N,Gao C,Xiong Y.Defect engineering:a versatile tool for tuning the activation of key molecules in photocatalytic reactions[J].Journal of Energy Chemistry,2019,37:43-57.
[7] Wan P,Hood Z D,Adhikari S P,et al.Enhancing the photoresponse and photocatalytic properties of TiO2 by controllably tuning defects across {101} facets[J].Applied Surface Science,2018,434:711-716.
[8] 张宁.钨氧化物的缺陷工程调控与催化性能研究[D].合肥:中国科学技术大学,2018.
[9] Deng R,Zhang X T,Zhang E,et al.Planar defects in Sn-doped single-crystal ZnO nanobelts[J].The Journal of Physical Chemistry C,2007,111(35):13013-13015.
[10] Xing Z,Li P,Dai D,et al.Self-luminescence of perovskite-like LaSrGaO4 via intrinsic defects and anomalous luminescence analysis of LaSrGaO4∶Mn2+[J].Inorganic Chemistry,2019,58(8):4869-4879.
[11] Tam K H,Cheung C K,Leung Y H,et al.Defects in ZnO nanorods prepared by a hydrothermal method[J].Journal of Physical Chemistry B,2006,110(42):20865.
[12] Tang J,Chai J,Huang J,et al.ZnO nanorods with low intrinsic defects and high optical performance grown by facile microwave-assisted solution method[J].ACS Applied Materials & Interfaces,2015,7(8):4737-4743.
[13] Zheng Y,Chen C,Zhan Y,et al.Luminescence and photocatalytic activity of ZnO nanocrystals:correlation between structure and property[J].Inorganic Chemistry,2007,46(16):6675-6682.
[14] Bitenc M,PodbręAček P,Crnjak Orel Z,et al.Correlation between morphology and defect luminescence in precipitated ZnO nanorod powders[J].Crystal Growth and Design,2009,9(2):997-1001.
[15] Guo H L,Zhu Q,Wu X L,et al.Oxygen deficient ZnO1-x nanosheets with high visible light photocatalytic activity[J].Nanoscale,2015,7(16):7216-7223.
[16] Eixenberger J E,Anders C B,Wada K,et al.Defect engineering of ZnO nanoparticles for bioimaging applications[J].ACS Applied Materials & Interfaces,2019,11(28):24933-24944.
[17] Su X F,Chen J B,He R M,et al.The preparation of oxygen-deficient ZnO nanorod arrays and their enhanced field emission[J].Materials Science in Semiconductor Processing,2017,67:55-61.
[18] Das P P,Agarkar S A,Mukhopadhyay S,et al.Defects in chemically synthesized and thermally processed ZnO nanorods:implications for active layer properties in dye-sensitized solar cells[J].Inorganic Chemistry,2014,53(8):3961-3972.
[19] Mondal P.Oxygen vacancy induced anomalous Raman mode in intrinsic ZnO film[J].Vibrational Spectroscopy,2019,103:102939.
[20] Paradowska K M,Przeździecka E,Płaczek-Popko E,et al.Effect of annealing on photoluminescence and Raman scattering of Sb-doped ZnO epitaxial layers grown on a-Al2O3[J].Journal of Alloys and Compounds,2019,774:1160-1167.
[21] Singh J,Juneja S,Palsaniya S,et al.Evidence of oxygen defects mediated enhanced photocatalytic and antibacterial performance of ZnO nanorods[J].Colloids and Surfaces B:Biointerfaces,2019,184:110541.
[22] Lu X,Wang G,Xie S,et al.Efficient photocatalytic hydrogen evolution over hydrogenated ZnO nanorod arrays[J].Chemical Communications,2012,48(62):7717-7719.
[23] Zhang H,Yu S,Chen C,et al.Effects on structure,surface oxygen defects and humidity performance of Au modified ZnO via hydrothermal method[J].Applied Surface Science,2019,486:482-489.
[24] Wang J,Chen R,Xiang L,et al.Synthesis,properties and applications of ZnO nanomaterials with oxygen vacancies:a review[J].Ceramics International,2018,44(7):7357-7377.
[25] Zhang Z,Choi M,Baek M,et al.Corrosion-assisted self-growth of Au-decorated ZnO corn silks and their photoelectrochemical enhancement[J].ACS Applied Materials & Interfaces,2017,9(4):3967-3976.
基金资助
江苏省研究生科研与实践创新计划(KYCX20-2566)