Optical and Structural Properties of 2D ZnO Nanosheets Synthesized Using Simple Chemical Solution Route

In the present paper, two-dimensional (2D) Zinc oxide (ZnO) nanosheets were prepared through a simple, single-step chemical solution method followed by annealing treatment without any surfactant, template or catalyst. The prepared ZnO nanosheets were characterized for their structural and optical properties by different techniques such as XRD, SEM with EDS, RAMAN, FTIR, UV-Visible and photoluminescence (PL) spectroscopy. The X-ray diffraction (XRD) spectra display sharp and highly intense peaks corresponding to the (101) plane, confirming the wurtzite crystal structure of ZnO. Scanning electron microscopy (SEM) images confirm the sheet-like structure of ZnO nanosheets with a thickness of approximately 23 nm. The elemental composition has been estimated through the Energy dispersive spectroscopy (EDS) technique. The basic reaction mechanism is discussed in detail. The stretching vibrations of Zn and O bonding were observed from FTIR spectra. The optical properties and optical bandgap have been obtained by UV-Visible and PL spectroscopy. The optical bandgap of ZnO is 3.20 eV from UV-Visible spectroscopy via Tauc’s plot. PL measurement confirming oxygen deficiency in ZnO nanosheets. These results of prepared ZnO nanosheets are expected to perform well in various applications such as photodetectors, sensors and in optoelectronic devices.

[1]  S. Arya,et al.  Enhanced Nanogenerator Performances of 1-D Al-Doped ZnO Nanorod Arrays through Ultrasonic Wave Systems , 2023, ACS Applied Electronic Materials.

[2]  Myung Sik Choi,et al.  No2 Gas Sensing Properties of Ag-Functionalized Porous Zno Sheets , 2023, SSRN Electronic Journal.

[3]  S. Young,et al.  UV-Enhanced Electrical Performances of ZnO:Ga Nanostructure Nanogenerators by Using Ultrasonic Waves , 2022, IEEE Transactions on Electron Devices.

[4]  A. Khosla,et al.  Improvement of the UV-Sensing Performance of Ga-Doped ZnO Nanostructures via a Wet Chemical Solution at Room Temperature , 2021, ECS Journal of Solid State Science and Technology.

[5]  Jing Wang,et al.  Mesoporous ZnO nanosheets with rich surface oxygen vacancies for UV-activated methane gas sensing at room temperature , 2021 .

[6]  Prashant K. Sharma,et al.  Development of ZnO nanostructure film for pH sensing application , 2020 .

[7]  Zabihollah Ahmadi,et al.  Accelerated synthesis of atomically-thin 2D quantum materials by a novel laser-assisted synthesis technique , 2019, 2D Materials.

[8]  Santanu Das,et al.  Vertically aligned zinc oxide nanosheet for high-performance photocatalysis of water pollutants , 2019, Ceramics International.

[9]  J. Yun,et al.  Nano lily-buds garden like ZnO nanostructures based gas sensor for H2 detection , 2019, Materials Letters.

[10]  H. Cai,et al.  ZnO Nanosheets Abundant in Oxygen Vacancies Derived from Metal‐Organic Frameworks for ppb‐Level Gas Sensing , 2019, Advanced materials.

[11]  A. Habibi-Yangjeh,et al.  Review on the criteria anticipated for the fabrication of highly efficient ZnO-based visible-light-driven photocatalysts , 2018, Journal of Industrial and Engineering Chemistry.

[12]  M. I. Khan,et al.  Structural and optical properties of pure and copper doped zinc oxide nanoparticles , 2018, Results in Physics.

[13]  S. Young,et al.  High Response of Ultraviolet Photodetector Based on Al-Doped ZnO Nanosheet Structures , 2017, IEEE Journal of Selected Topics in Quantum Electronics.

[14]  S. Harish,et al.  Controlled synthesis of organic ligand passivated ZnO nanostructures and their photocatalytic activity under visible light irradiation. , 2015, Dalton transactions.

[15]  Huicong Liu,et al.  Growth of porous ZnO nanosheets by electrodeposition with the addition of KBr in nitrate electrolyte , 2012 .

[16]  Shalendra Kumar,et al.  Growth and characterization of ZnO nanorods by microwave-assisted route: green chemistry approach , 2011 .

[17]  Fei Zhou,et al.  Porous ZnO nanosheets grown on copper substrates as anodes for lithium ion batteries , 2011 .

[18]  Zhiqiang Gao,et al.  Direct-write fabrication of a nanoscale digital logic element on a single nanowire , 2010, Nanotechnology.

[19]  S. Jokela,et al.  Defects in ZnO , 2009 .

[20]  P. Chaudhuri,et al.  Violet emission from flower-like bundle of ZnO nanosheets , 2009 .

[21]  Dapeng Yu,et al.  Morphological effects on the field emission of ZnO nanorod arrays , 2005 .

[22]  Zhong Lin Wang.  Zinc oxide nanostructures: growth, properties and applications , 2004 .

[23]  David P. Norton,et al.  Recent progress in processing and properties of ZnO , 2003 .

[24]  Ling-Dong Sun,et al.  Control of ZnO Morphology via a Simple Solution Route , 2002 .

[25]  Bixia Lin,et al.  Green luminescent center in undoped zinc oxide films deposited on silicon substrates , 2001 .

[26]  Yiying Wu,et al.  Room-Temperature Ultraviolet Nanowire Nanolasers , 2001, Science.

[27]  B. H. Bairamov,et al.  Raman study of the phonon Halfwidths and the phonon-plasmon coupling in ZnO , 1983 .

[28]  Manuel Cardona,et al.  Resonant Raman scattering in ZnO , 1977 .

[29]  J. Miao,et al.  Highly sensitive sensor based on ordered porous ZnO nanosheets for ethanol detecting application , 2021 .

[30]  J. Yun,et al.  Holey engineered 2D ZnO-nanosheets architecture for supersensitive ppm level H2 gas detection at room temperature , 2021 .

[31]  N. Qamhieh,et al.  Synthesis and length dependent photoluminescence property of zinc oxide nanorods , 2017 .

[32]  A. Akl,et al.  Effect of Se addition on optical and electrical properties of chalcogenide CdSSe thin films , 2016 .

[33]  Aurangzeb Khan.  Raman Spectroscopic Study of the ZnO Nanostructures , 2011 .

[34]  R. Yousefi,et al.  Effects of annealing temperature on some structural and optical properties of ZnO nanoparticles prepared by a modified sol–gel combustion method , 2011 .

[35]  C. Serna,et al.  Formation of rod-like zinc oxide microcrystals in homogeneous solutions , 1990 .