热处理对<strong>Ag-ZnO</strong>异质结构光催化性能的影响

doi:10.11901/1005.3093.2020.132

材料研究学报

2020, Vol. 34

Issue (10): 770-776 DOI: 10.11901/1005.3093.2020.132

研究论文

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热处理对Ag-ZnO异质结构光催化性能的影响

朱晓东¹, 王娟¹, 马洋¹, 罗建军², 喻林², 冯威¹(

)

1.成都大学机械工程学院成都 610106
2.四川一然新材料科技有限公司成都 610105

Influence of Heat Treatment on Photocatalytic Activity of Ag-ZnO Heterostructure

ZHU Xiaodong¹, WANG Juan¹, MA Yang¹, LUO Jianjun², YU Lin², FENG Wei¹(

)

1. School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
2. Sichuan Yiran New Material Technology Co. Ltd. , Chengdu 610105, China

引用本文:

朱晓东, 王娟, 马洋, 罗建军, 喻林, 冯威. 热处理对Ag-ZnO异质结构光催化性能的影响[J]. 材料研究学报, 2020, 34(10): 770-776.
Xiaodong ZHU, Juan WANG, Yang MA, Jianjun LUO, Lin YU, Wei FENG. Influence of Heat Treatment on Photocatalytic Activity of Ag-ZnO Heterostructure[J]. Chinese Journal of Materials Research, 2020, 34(10): 770-776.

全文: PDF(10098 KB) HTML

摘要:

用溶胶-凝胶法制备纯ZnO和Ag修饰ZnO复合光催化剂，并分别对其进行了400℃、450℃、500℃保温2 h的热处理。使用XRD、SEM、TEM、XPS、PL、BET等手段对其进行了表征。结果表明，纯ZnO和Ag修饰ZnO均为六方纤锌矿晶型，Ag颗粒沉积在ZnO表面形成了Ag-ZnO异质结构。以罗丹明B为目标污染物研究了样品的光催化活性。结果表明，热处理温度对纯ZnO的光催化性能的影响较大，在450℃热处理后光催化效果最佳；热处理温度对Ag修饰ZnO的光催化性能没有显著的影响；Ag修饰ZnO比纯ZnO的光催化活性均有所提高，因为Ag修饰提高了ZnO表面羟基的含量并抑制了光生电子与空穴的复合。在500℃热处理后Ag修饰ZnO对罗丹明B的60 min降解率达到98%，其反应速率常数为0.063 min^-1。

关键词 ：复合材料, ZnO, Ag修饰, 光催化活性, 溶胶-凝胶法

Abstract：

The pure ZnO and Ag-modified ZnO composite photocatalysts were prepared by sol-gel method and subsequently heat treated at 400℃, 450℃ and 500℃ respectively for 2 h. The samples were characterized by XRD, SEM, TEM, XPS, PL and BET, respectively. The results show that both pure ZnO and Ag-ZnO are hexagonal wurtzite crystal structures. Ag particles deposit on the surface of ZnO, forming Ag-ZnO heterostructure. The photocatalytic activity of samples was assessed through the degradation of Rhodamine B. The results show that the heat treatment temperature has a great influence on the photocatalytic performance of pure ZnO, while the pure ZnO annealed at 450℃ exhibits the best photocatalytic activity. However, the annealing temperature has negligible impact on the photocatalytic activity of Ag-ZnO and all of the Ag-ZnO samples show better photocatalytic activity than that of the pure ZnO. The enhancement in photocatalytic activity of Ag-ZnO can be attributed to the effect of suppressing the recombination of photogenerated pairs and the increase of surface hydroxyl content. The degradation rate of RhB for the Ag-ZnO annealed at 500℃ is 98% after 60 min and the reaction rate constant is 0.063 min^-1.

Key words： composite ZnO Ag modification photocatalytic activity sol-gel method

收稿日期: 2020-04-20

ZTFLH:

TB34

基金资助:四川省科技厅应用基础研究(19YJ0664);四川省科技厅应用基础研究(2018JY0062);2020成都大学大学生创新计划(CDU-CX-2020028);2020成都大学大学生创新计划(CDU-CX-2020034)

作者简介: 朱晓东，男，1984年生，副教授

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https://www.cjmr.org/CN/10.11901/1005.3093.2020.132 或 https://www.cjmr.org/CN/Y2020/V34/I10/770

图1 纯ZnO和Ag-ZnO的XRD图谱

图2 在500℃热处理后纯ZnO 和Ag-ZnO的SEM照片

图3 在500℃热处理后 Ag-ZnO 的TEM照片和HRTEM照片

图4 在500℃热处理后纯ZnO和Ag-ZnO的 XPS图谱

图5 纯ZnO和Ag-ZnO对RhB的降解率曲线

图6 纯ZnO和Ag-ZnO对RhB的光降解动力学曲线

图7 纯ZnO和Ag-ZnO 的PL光谱

图8 Ag-ZnO的光催化降解RhB示意图

[1]	Lu J, Wang H H, Dong S J, et al. Effect of Ag shapes and surface compositions on the photocatalytic performance of Ag/ZnO nanorods [J]. J. Alloys Compd., 2014, 617: 869 doi: 10.1016/j.jallcom.2014.08.096
[2]	Xie L, Wang P, Li Z Fet al. Hydrothermal synthesis and photocatalytic activity of CuO/ZnO composite photocatalyst [J]. Chin. J. Mater. Res., 2019, 33(10): 728
[2]	谢亮, 王平, 李之锋等. CuO/ZnO复合光催化剂的制备和性能 [J]. 材料研究学报, 2019, 33(10): 728
[3]	Yu Y, Yao B H, Yang F, et al. Preparation and photocatalytic properties of TiO₂-ZnO composite hollow microspheres [J]. Acta Mater. Compos. Sin., 2019, 36(1): 200
[3]	于艳, 姚秉华, 杨帆等. TiO₂-ZnO复合中空微球的制备及光催化性能 [J]. 复合材料学报, 2019, 36(1): 200
[4]	Chang Y C, Guo J Y. ZnO/Pt core-shell nanorods on the cotton threads with high enhanced photocatalytic properties [J]. Mater. Chem. Phys., 2016, 180: 9 doi: 10.1016/j.matchemphys.2016.06.013
[5]	Guy N, Ozacar M. The influence of noble metals on photocatalytic activity of ZnO for Congo red degradation International [J]. Int.J. Hydrogen Energ., 2016, 41: 20100
[6]	Jung H J, Koutavarapu R, Lee S K, et al. Enhanced photocatalytic activity of Au-doped Au@ZnO core-shell flower-like nanocomposites [J]. J. Alloys Compd., 2018, 735: 2058 doi: 10.1016/j.jallcom.2017.11.378
[7]	Yang W S, Jian S J, Zuo T, et al. Preparation of Ag/ ZnO composite hollow material and photocatalytic degradation for Rhodamine B [J]. New Chem. Mater., 2018, 46(1): 140
[7]	杨为森, 简绍菊, 左甜等. Ag/ZnO复合中空材料的制备及光催化降解罗丹明B [J]. 化工新型材料, 2018, 46(1): 140
[8]	Jia Z G, Peng K K, Li Y H, et al. Preparation and photocatalytic performance of porous ZnO microrods loaded with Ag [J]. Trans. Nonferrous Met. Soc. China, 2012, 22: 873 doi: 10.1016/S1003-6326(11)61259-4
[9]	Dong Y Y,Jiao Y Q,Jiang B J, et al. Commercial ZnO and its hybrid with Ag nanoparticles: Photocatalytic performance and relationship with structure [J]. Chem. Phys. Lett., 2017, 679: 137
[10]	Muñoz-Fernandez L, Sierra-Fernandez A, Miloševic´ O, et al. Solvothermal synthesis of Ag/ZnO and Pt/ZnO nanocomposites and comparison of their photocatalytic behaviors on dyes degradation [J]. Adv. Powder Technol., 2016, 27: 983
[11]	Zhao X H, Su S, Wu G L, et al. Facile synthesis of the flower-like ternary heterostructure of Ag/ZnO encapsulating carbon spheres with enhanced photocatalytic performance [J]. Appl. Surf. Sci., 2017, 406: 254
[12]	Bouzid H, Faisal M, Harraz F A, et al. Synthesis of mesoporous Ag/ZnO nanocrystals with enhanced photocatalytic activity [J]. Catal. Today, 2015, 252: 20
[13]	Meng A, Li X J, Wang X L, et al. Preparation, photocatalytic properties and mechanism of Fe or N-doped Ag/ZnO nanocomposites [J]. Ceram. Int., 2014, 40: 9303
[14]	Liu Y S, Gao W, Zhang C. In situ formation of Ag/ZnO heterostructure arrays during synergistic photocatalytic process for SERS and photocatalysis [J]. J. Taiwan Inst. Chem. E., 2018, 88: 277
[15]	Liu H R, Hu Y C, Zhang Z X, et al. Synthesis of spherical Ag/ZnO heterostructural composites with excellent photocatalytic activity under visible light and UV irradiation [J]. Appl. Surf. Sci., 2015, 355: 644
[16]	Intarasuwan K, Amornpitoksuk P, Suwanboon S, et al. Effect of Ag loading on activated carbon doped ZnO for bisphenol A degradation under visible light [J]. Adv. Powder Technol., 2018, 29: 2608
[17]	Zhang L L, Zhu D, He H X, et al. Enhanced piezo/solar-photocatalytic activity of Ag/ZnO nanotetrapods arising from the coupling of surface plasmon resonance and piezophototronic effect [J]. J. Phys. Chem. Solids, 2017, 102: 27
[18]	Demirci S, Dikici T, Yurddaskal M, et al. Synthesis and characterization of Ag doped TiO₂ heterojunction films and their photocatalytic performances [J]. Appl. Surf. Sci., 2016, 390: 591
[19]	Jiang H Q, Liu Y D, Li J S, et al.Synergetic effects of lanthanum, nitrogen and phosphorus tri-doping on visible-light photoactivity of TiO₂ fabricated by microwave-hydrothermal process [J]. J. Rare Earth., 2016, 34(6): 604
[20]	Jaramillo-Páez C, Navío J A, Hidalgo M C, et al. High UV-photocatalytic activity of ZnO and Ag/ZnO synthesized by a facile method [J]. Catal. Today, 2017, 284: 121
[21]	Chen F, Tang Y Z, Liu C B, et al. Synthesis of porous structured ZnO/Ag composite fibers with enhanced photocatalytic performance under visible irradiation [J]. Ceram. Int., 2017, 43: 14525
[22]	Wang M, Xu J Y, Sun T M, et al.Facile photochemical synthesis of hierarchical cake-like ZnO/Ag composites with enhanced visible-light photocatalytic activities [J]. Mater. Lett., 2018, 219: 236
[23]	Sampaio M J, Lima M J,Baptista D L, et al. Ag-loaded ZnO materials for photocatalytic water treatment [J]. Chem. Eng. J., 2017, 318: 95
[24]	Yang Y Q, Li H X, Hou F L, et al. Facile synthesis of ZnO/Ag nanocomposites with enhanced　photocatalytic properties under visible light [J]. Mater. Lett., 2016, 180: 97
[25]	Hossein F, Kasaeian A, Pourfayaz F, et al. Novel ZnO-Ag/MWCNT nanocomposite for the photocatalytic degradation of phenol [J]. Mater. Sci. Semicon. Proc., 2018, 83: 175
[26]	Rajaboopathi S, Thambidurai S. Enhanced photocatalytic activity of Ag-ZnO nanoparticles synthesized by using Padina gymnospora seaweed extract [J]. J. Mol. Liq., 2018, 262: 148 doi: 10.1016/j.molliq.2018.04.073
[27]	Georgekutty R, Seery M K, Pillai S C. A highly efficient Ag-ZnO photocatalyst: synthesis, properties, and mechanism [J]. J. Phys. Chem. C, 2008, 112: 13563

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