没食子酸修饰Au@Ag纳米颗粒的制备和催化活性研究
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摘要
采用没食子酸修饰Au@Ag纳米颗粒,并利用紫外可见光吸收光谱对不同条件(金/银摩尔比、保护剂用量、反应温度、反应时间)制备所得纳米颗粒进行表征,最佳工艺条件为:金/银摩尔比1∶5,加入0.06%的三聚磷酸钠作保护剂,反应温度控制在60℃,反应时间15分钟。透射电镜结果表明该产物为类球形,平均直径21.7nm,分散性好。实验表明Au@Ag纳米颗粒具有类过氧化物酶催化活性,对比单纯Au、Ag纳米颗粒,其催化活性更强,其催化效果在浓度为10mmol·L~(-1),过氧化氢浓度为0.5%,pH值约为9时最优。
Gallic acid(GA)was successfully applied to modify Au@Ag nanoparticles.The structure of Au@Ag nanoparticles under different conditions(Au/Ag mole ratio,dosage of protective agent,reaction temperature,reaction time)were characterized by UV absorption spectrum.The optimal technological process--Au/Ag mole ratio=1:5;dosage of Na_5P_3O_(10) as protective agent=0.06%;reaction temperature=60℃;reaction time=15 minutes.The results of TEM showed that the nanoparticles were spherical and the average diameter were 21 nm.The experiments show that Au@Ag nanoparticles have the catalytic activity.Compared to pure Au and Ag nanoparticles,the catalytic activity of Au@Ag nanoparticlesare better and its optimal concentration are 10 mmol·L~(-1).Optimal concentration of H_2O_2 and best pH value is 0.5%and 9 respectively.
Gallic acid(GA)was successfully applied to modify Au@Ag nanoparticles.The structure of Au@Ag nanoparticles under different conditions(Au/Ag mole ratio,dosage of protective agent,reaction temperature,reaction time)were characterized by UV absorption spectrum.The optimal technological process--Au/Ag mole ratio=1:5;dosage of Na_5P_3O_(10) as protective agent=0.06%;reaction temperature=60℃;reaction time=15 minutes.The results of TEM showed that the nanoparticles were spherical and the average diameter were 21 nm.The experiments show that Au@Ag nanoparticles have the catalytic activity.Compared to pure Au and Ag nanoparticles,the catalytic activity of Au@Ag nanoparticlesare better and its optimal concentration are 10 mmol·L~(-1).Optimal concentration of H_2O_2 and best pH value is 0.5%and 9 respectively.
引文
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[3]王晨,古宏晨.金、银纳米粒子包覆核壳结构微球的制备与研究进展[J].材料科学与工程学报,2011(06):958-964.
[4]吴青松.金、银纳米颗粒及其纳米壳层的制备、形成机理与光学性能研究[D].辽宁:东北大学,2006.
[5]纪小会,王连英,袁航,等.Au/Ag核-壳结构复合纳米粒子形成机制的研究[J].化学学报,2003(10):1556-1560.
[6]闫仕农,王永昌,郝丽梅,等.Au/Ag芯-壳复合结构纳米颗粒的制备和表征[J].功能材料,2005(03):425-426.
[7]刘健,郝倩云,李云涛,等.金-银合金纳米溶胶对血清SERS增强活性研究[J].应用激光,2017(05):722-726.
[8]王春阳,曾依,沈爱国,等.基于壳聚糖功能化的Au@Ag纳米颗粒高灵敏SERS检测双酚A[C].广东:中国物理学会光散射专业委员会十九届会议论文集,2017:301-301.
[9]周侠,张莉,王红艳,等.Au@Ag致密单层膜的组装及对农药残留的SERS检测[J].环境工程学报,2018:1-8.
[10]王利华,王佳慧,韩艳云,等.Au@Ag纳米粒子表面增强拉曼光谱法高灵敏检测孔雀石绿[J].武汉工程大学学报,2018(01):40-45.
[11]王瑞娟.EGCG为还原剂的银纳米材料绿色制备与应用[D],江苏:扬州大学,2011.
[12]王瑞娟,李敏,郑红梅,等.Au@Ag纳米粒子的绿色合成及SERS研究[C].中国化学会会议论文集,山西:2011:338-338.
[13]王小英,蔡济海.金银纳米合金在木聚糖中的绿色合成及其催化性能[C].中国化学会会议论文集.辽宁:2016.
[14]Saikia I,Hazarika M,Yunus S,et al.Green synthesis of Au-Ag-In-rGO nanocomposites and its α-glucosidase inhibition and cytotoxicity effects[J].Materials Letters,2018,211:48-50.
[15]Hazarika M,Sonowal S,Saikia I,et al.Biogenic synthesis of Au-Ag-In decorated on rGO nanosheet and its antioxidant and biological activities[J].Materials Research Express,2017,4(9).
[16]Devi T B,Ahmaruzzaman M.Bioinspired Green and Facile Fabrication of Au@Ag@AgCl Hybrid Nanoparticles and Their Catalytic and Antimicrobial Properties[J].Chemistry select,2017,2(21).
[17]张雅丽.五倍子没食子酸的制备、抑菌作用及机理研究[D].陕西:陕西师范大学,2013.
[18]张云竹,代凯,施利毅,等.纳米银粒子的制备及其表征[J].化工新型材料,2006(07):31-32.
[19]Stremsdoerfer G,Perrot H,Martin J R,et al.Autocatalytic deposition of gold and palladium onto n ‐ GaAs in acidic media[J].Journal of The Electrochemical Society,1988,135(11):2881-2886.
[20]Brown K R,Walter D G,Natan M J,et al.Seeding of colloidal au nanoparticle solutions.2.improved control of particle size and shape[J].Chemistry of Materials,2000,12(2):306-313.
[21]Henglein A.Physicochemical properties of small metal particles in solution:"microelectrode"reactions,chemisorption,composite metal particles,and the atom-to-metal transition[J].The Journal of Physical Chemistry,1993,97(21):5457-5471.
[22]Belloni J,Mostafavi M,Remita H,et al.Radiation-induced synthesis of mono-and multi-metallic clusters and nanocolloids[J].New Journal of Chemistry,1998,22(11):1239-1255.
[23]Wei H,Wang E.Fe3O4 Magnetic nanoparticles as peroxidase mimetics and their applications in H2O2 and glucose detection[J].Anal Chem,2008(80):2250-2254.
[24]Han L,Li C,Zhang T,et al.Au@Ag Heterogeneous nanorods as nanozyme interfaces with peroxidase-like activity and their application for one-pot analysis of glucose at nearly neutral pH[J].ACS Applied Materials&Interfaces,2015,7(26):14463-14470.
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