[1] [1] Theerthagiri J, Salla S, Senthil R A, et al. A review on ZnO nanostructured materials: energy, environmental and biological applications［J］.Nanotechnology,2019,30(39): 392001.

[2] [2] Samadi M, Zirak M, Naseri A, et al. Design and tailoring of one-dimensional ZnO nanomaterials for photocatalytic degradation of organic dyes: a review［J］.Research on Chemical Intermediates,2019,45(4): 2197-2254.

[3] [3] Ashouri R, Ghasemipoor P, Rasekh B, et al. The effect of ZnO-based carbonaceous materials for degradation of benzoic pollutants: a review［J］.International Journal of Environmental Science and Technology,2019,16(3): 1729-1740.

[4] [4] Wetchakun K, Wetchakun N, Sakulsermsuk S. An overview of solar/visible light-driven heterogeneous photocatalysis for water purification: TiO2- and ZnO-based photocatalysts used in suspension photoreactors［J］.Journal of Industrial and Engineering Chemistry,2019,71: 19-49.

[5] [5] Zhang P, Wu J, Zhang T, et al. Perovskite solar cells with ZnO electron-transporting materials［J］.Advanced Materials, 2018,30(3): 1703737.

[6] [6] Ong C B, Ng L Y, Mohammad A W. A review of ZnO nanoparticles as solar photocatalysts: synthesis, mechanisms and applications［J］.Renewable & Sustainable Energy Reviews,2018,81: 536-551.

[7] [7] Mohammadi E, Aliofkhazraei M, Hasanpoo M, et al. Hierarchical and complex ZnO nanostructures by microwave-assisted synthesis: norphologies, growth mechanism and classification［J］.Critical Reviews in Solid State and Materials Sciences, 2018,43(6): 475-541.

[8] [8] Tahir M B, Javad H, Nadeem K, et al. ZnO thin films: recent development, future perspectives and applications for dye sensitized solar cell ［J］.Surface Review and Letters,2018,25(7): 1930001.

[9] [9] Gao Z, Banerjee P. Review article: atomic layer deposition of doped ZnO films［J］.Journal of Vacuum Science & Technology A, 2019,37(5): 050802.

[10] [10] Singh P, Kumar R, Singh R K. Progress on transition metal-doped ZnO nanoparticles and its application［J］.Industrial & Engineering Chemistry Research,2019,58(37): 17130-17163.

[11] [11] Ma Q, Yang X D, Lv X Z, et al. Cu doped ZnO hierarchical nanostructures: morphological evolution and photocatalytic property［J］. Journal of Materials Science-Materials in Electronics,2019,30(3): 2309-2315.

[12] [12] Kale G, Arbuj S, Kawade U, et al. Paper templated synthesis of nanostructured Cu-ZnO and its enhanced photocatalytic activity under sunlight［J］.Journal of Materials Science-Materials in Electronics,2019,30(7): 7031-7042.

[13] [13] Fkiri A, Wiem S, Sellami B, et al. Facile synthesis of Cu-doped ZnO nanoparticle in triethyleneglycol: photocatalytic activities and aquatic ecotoxicity［J］.Environmental Technology,2019: 1619845.

[14] [14] Narayanan N, Deepak N K. Enhancement of visible luminescence and photocatalytic activity of ZnO thin films via Cu doping［J］. Optik,2018,158: 1313-1326.

[15] [15] Li X L, He S S, Liu X S, et al. Polymer-assisted freeze-drying synthesis of Ag-doped ZnO nanoparticles with enhanced photocatalytic activity［J］.Ceramics International,2019,45(1): 494-502.

[16] [16] Singh R, Barman P B, Sharma D. Synthesis, structural and optical properties of Ag doped ZnO nanoparticles with enhanced photocatalytic properties by photo degradation of organic dyes［J］.Journal of Materials Science-Materials in Electronics,2017,28(8): 5705-5717.

[17] [17] Kaur A, Ibhadon A O, Kansal S K. Photocatalytic degradation of ketorolac tromethamine (KTC) using Ag-doped ZnO microplates［J］.Journal of Materials Science,2017,52(9): 5256-5267.

[18] [18] Ashebir M E, Tesfamariam G M, Nigussie G Y, et al. Structural, optical, and photocatalytic activities of Ag-doped and Mn-doped ZnO nanoparticles［J］.Journal of Nanomaterials,2018,9425938: 1-9.

[19] [19] Li W L, Hou Q Y, Xu Z C, et al. Study of point defect on the stability and magneto-optical properties of ZnO∶Cu by first-principles［J］.Molecular Physics,2019,117(14): 1858-1870.

[20] [20] Pan F C, Lin X L, Li J, et al. The electronic structures and ferromagnetism of Cu-doped ZnO: the first-principle calculation study［J］. Journal of Superconductivity and Novel Magnetism,2018,31(7): 2103-2110.

[21] [21] Lemine O M, Modwi A, Houas A, et al. Room temperature ferromagnetism in Ni, Fe and Ag co-doped Cu-ZnO nanoparticles: an experimental and first-principles DFT study［J］.Journal of Materials Science-Materials in Electronics,2018,29(17): 14387-14395.

[22] [22] Liu Y J, Hou Q Y, Xu Z C, et al. Effects of Ag doping and point defect on the magnetism of ZnO［J］.Journal of Superconductivity and Novel Magnetism,2019,32(7): 2097-2106.

[23] [23] Masoumi S, Noori A, Nadimi E, et al. Diffusion mechanisms of Ag atom in ZnO crystal: A first principles study［J］.Journal of Physics Conference Series,2017,939: 012014.

[24] [24] Zhang M L, Chen Y H, Hang C R, et al. Effect of intrinsic defects and copper impurities co-existing on electromagnetic optical properties of ZnO: First principles study［J］.Acta Physica Sinica,2019,68(8): 087101.

[25] [25] Ma Z H, Ren F Z, Ming X L, et al. Cu-doped ZnO electronic structure and optical properties studied by first-principles calculations and experiments［J］.Materials,2019,12(1): 196.

[26] [26] Hou Q Y, Zha C W, Jia X F, et al. Effect of heavy Ag doping on the physical properties of ZnO［J］.International Journal of Modern Physics B,2018,32(9): 1850099.

[27] [27] Pal U, Vazquez C O, Bautista H, et al. Formation of Cu-x clusters in Cu/ZnO nanocomposites studied by IR spectroscopy［J］. Physica Status Solidi C: Current Topics in Solid State Physics,2003,0(8): 2956-2960.

[28] [28] Leitner J, Bartunek V, Sedmidubsky D, et al. Thermodynamic properties of nanostructured ZnO［J］.Applied Materials Today, 2018,10: 1-11.

[29] [29] Zhang H F, Lu S X, Xu W G, et al. First-principles study of electronic structures and photocatalytic activity of low-Miller-index surfaces of ZnO［J］.Journal of Applied Physics,2013,113(3): 034903.