Preparation of nano-ZnO by gentle liquid phase method and its photocatalytic performance

Abstract

Abstract: Using ZnCl₂ as the zinc source, a flower-like hexagonal wurtzite structure oxygen vacancy-deficient nano-ZnO material composed of zinc oxide particles with a particle size of about 17 nm was prepared by a liquid phase method. The structure, morphology and composition were characterized. The band gap of the prepared ZnO was calculated by UV-Vis absorption spectroscopy. Its photocatalytic properties were investigated using methylene blue. The results show that the oxygen vacancy defect ZnO nanomaterials have good crystallinity and morphology, and the band gap width is 3.17 eV, which is lower than that of ordinary ZnO. When photocatalytic degradation of methylene blue solution for 0.5 h and 2.5 h, the degradation rates are 20% and 80% respectively, and the degradation rate is 4 times higher than that of ordinary Ag nanoparticles doped zinc oxide, indicating that the prepared oxygen vacancy defect ZnO nanomaterials have excellent photocatalytic properties.

Key words: zinc oxide, nanomaterials, photocatalytic, organic pollutants

CLC Number:

TB34

LÜ Kang-le, SONG Jun-mi. Preparation of nano-ZnO by gentle liquid phase method and its photocatalytic performance[J]. Journal of Lanzhou University of Technology, 2022, 48(4): 25-29.

References

[1] LIU M,LI J,BIAN R,et al.ZnO@Ti₃C₂ MXene interfacial Schottky junction for boosting spatial charge separation in photocatalytic degradation [J].Journal of Alloys and Compounds,2022,905:164025.
[2] JANGIR L K,BANSAL P,KUMARI Y,et al.Effective doping of Er³⁺ in ZnO nanoparticles to control its luminescentproperties [J].Macromolecular Symposia,2017,376(1):1700005.
[3] YAN L,LIU Y,YAN Y,et al.Improved plasmon-assisted photoelectric conversion efficiency across entireultraviolet-visible region based on antenna-on zinc oxide/silver three dimensional nanostructured films [J].Nano Research,2018,11(1):520-529.
[4] AHMAD M,AHMED E,HONG Z L,et al.Structural,optical and photocatalytic properties of hafnium doped zinc oxide nanophotocatalyst [J].Ceramics International,2013,39(8):8693-8700.
[5] 毛洪凯.改性氧化锌纳米光催化材料的制备及光催化性能研究 [D].镇江:江苏大学,2016.
[6] LIAO X,LIAO Q,ZHANG Z,et al.A highly stretchable ZnO@fiber-based multifunctional nanosensor forstrain/temperature/UV detection [J].Advanced Functional Materials,2016,26(18):3074-3081.
[7] HAN H V,HOA N D,TONG P V,et al.Single-crystal zinc oxide nanorods with nanovoids as highly sensitive NO₂,nanosensors [J].Materials Letters,2013,94(94):41-43.
[8] DONG S,ZHANG D,CUI H,et al.ZnO/porous carbon composite from a mixed-ligand MOF for ultrasensitive electrochemical immunosensing of C-reactive protein [J].Sensors and Actuators B: Chemical,2019,284:354-361.
[9] SANG K L,HWANG S H,KIM S,et al.Preparation of ZnO nanorods by microemulsion synthesis and their application as a CO gas sensor [J].Sensors & Actuators B Chemical,2011,160(1):94-98
[10] FENG W,HUANG P,WANG B,et al.Solvothermal synthesis of ZnO with different morphologies in dimethylacetamide media [J].Ceramics International,2016,42(2):2250-2256.
[11] JIAO C,TANG F,XUE M.Template synthesis of porous nano ZnO and its adsorption capability [J].Micro & Nano Letters,2017,12(7):466-469.
[12] CARVALHO R G,TAVARES M T S,OLIVEIRA F K F,et al.Preparation and photocatalytic properties of hexagonal-shaped ZnO:Sm³⁺,by microwave-assisted hydrothermal method [J].Journal of Materials Science Materials in Electronics,2017,28(11):1-8.
[13] HUSHAM M,HAMIDON M N,PAIMAN S,et al.Synthesis of ZnO nanorods by microwave-assisted chemical-bath deposition for highly sensitive self-powered UV detection application [J].Sensors & Actuators A Physical,2017,263(15):166-193.
[14] YAHAYA M,TAN S T,UMAR A A,et al.Synthesis of ZnO nanorod arrays by chemical solution and microwave method for sensor application [J].Key Engineering Materials,2014,605:585-588.
[15] TAGHIZADEH M T,KHELJAN N B,VATANPARAST M.Ultrasonic-assisted synthesis of ZnO/NiO nanocomposites and kinetic study of their photocatalytic activity[J].Journal of Materials Science,2018,29(2):978-984.
[16] TSAY C Y,FAN K S,CHEN S H,et al.Preparation and characterization of ZnO transparent semiconductor thin films by sol-gel method [J].Journal of Alloys & Compounds,2010,495(1):126-130.
[17] 李维学,高姗姗,戴剑锋,等.Cu/Al共掺ZnO光学性质的第一性原理计算 [J].兰州理工大学学报,2021,47(4):6-12.
[18] 李维学,薛晓峰,戴剑锋,等.Cu-Cd共掺杂ZnO电子结构与光学性质的第一性原理计算与分析 [J].兰州理工大学学报,2020,46(2):166-172.
[19] ZHANG J,SUN L,LIAO C,et al.A simple route towards tubular ZnO [J].Chemical Communications,2002(3):262-263.
[20] ZHANG H,YANG D,MA X,et al.Synthesis of flower-like ZnO nanostructures by an organic-free hydrothermal process [J].Nanotechnology,2004,15(5):622-626.
[21] 宋国利.纳米ZnO和稀土离子掺杂ZnO发光材料制备与发光机制 [M].北京: 中国科学技术出版社.2018.
[22] 宋国利,梁红,孙凯霞.纳米晶ZnO可见发射机制的研究 [J].光子学报,2004,33(4):485-488.
[23] 于富成,南冬梅,王博龙,等.Ag纳米颗粒修饰对La掺杂ZnO纳米棒光催化性能的影响 [J].兰州理工大学学报,2021,47(1):28-35.
[24] 陈艳敏,钟晶,陈锋,等.氟掺杂纳米TiO₂薄膜的低温制备及其光催化性能 [J].催化学报,2010,31(1):120-125.
[25] SUN S D,KONG C C,YOU H J,et al.Facet-selective growth of Cu-Cu₂O heterogeneous architectures [J].Cryst Eng Comm,2012(1):40-43.