CN110680927B - 一种zif-8纳米球同时负载Au NPs和Fe3O4 NPs的方法 - Google Patents
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Abstract
本发明公开了一种zif‑8纳米球同时负载Au NPs和Fe3O4 NPs的方法。具体步骤如下:(1)柠檬酸钠还原法制备13nm金纳米粒子,用聚乙二醇mPEG‑SH稳固;(2)铁(III)乙酰丙酮(Fe(acac)3)与油酸‑乙醇反应制备12nm油酸稳定的Fe3O4 NPs,用聚乙二醇mPEG‑COOH稳固;(3)将(1)与(2)同时加入到硝酸锌中,搅拌均匀,再加入二甲基咪唑,反应制备zif‑8同时负载Au NPs和Fe3O4 NPs的纳米球。通过本发明制备的zif‑8纳米球具有光热性能和磁共振成像作用,可以用于生物探针、磁靶向等多种用途,尤其适用于癌症的磁靶向给药和细胞内光热治疗。该方法获得的包埋两种纳米粒子于zif‑8中的技术易于控制载入的Au NPs和Fe3O4 NPs的量,产率高,可实现大规模制备。
Description
技术领域
本发明涉及新型材料领域,具体涉及一种zif-8纳米球同时负载Au NPs和Fe3O4NPs的方法。
背景技术
金属有机骨架(MOF)具有其较大的内表面积、均匀可调的纳米腔和稳定的形貌,广泛用于气体存储、催化、光热、纳滤膜以及药物输送。近年来,纳米尺寸 MOF(nanoMOF)的制备为其应用提供了更广阔的应用空间,尤其是药物递送领域的研究。研究发现,小尺寸的刚性纳米颗粒可以吸附在nanoMOF的表面上或嵌入nanoMOF的空腔中,从而产生具有新颖化学和物理特性的混合晶体,赋予它们光热特性或生物成像应用,例如超顺磁性γ-Fe2O3@MOF用于靶向药物递送和成像,磁性Fe3O4@IRMOF-3用于成像和MRI造影剂,极低频交变磁场Fe3O4/Gd2O3@ZIF-90用于MRI跟踪药物递送,Fe3O4@UiO-66-DOX用于磁共振(MR)成像,用于基因治疗的DNAzyme加载MOF,用于癌症成像的三峰 Fe3O4@PAAAuNCs/ZIF-8NPs。
在这里,我们报告了一种zif-8纳米球同时负载Au NPs和Fe3O4 NPs的方法,没有公开关于如何通过zif-8纳米球同时负载Au NPs和Fe3O4 NPs的方法的相关研究。
发明内容
针对上述现有技术,本发明的目的是提供一种zif-8纳米球同时负载Au NPs和Fe3O4 NPs的方法。通过本发明制备的zif-8纳米球具有光热性能和磁共振成像作用,可以用于生物探针、磁靶向等多种用途,尤其适用于癌症的磁靶向给药和细胞内光热治疗。该方法获得的包埋两种纳米粒子于zif-8中的技术易于控制载入的Au NPs和Fe3O4 NPs的量,产率高,可实现大规模制备。
为实现上述目的,本发明采用如下技术方案:
(1)利用文献描述的经典方法柠檬酸钠还原法合成13nmAu NPs,简单的,将0.01%,300mL氯金酸至于带有回流冷凝管的500mL圆底烧瓶中,剧烈沸腾后开始搅拌加入1%,9mL柠檬酸三钠水溶液,反应20min,直到溶液变成红色,将所得Au NPs溶液迅速冰水冷却,备用;
(2)取(1)中Au NPs,加入聚乙二醇mPEG-SH,反应2h,16000rpm离心收集沉淀,并用去离子水分散洗涤3次,分散在甲醇中,获得聚乙二醇稳定的Au NPs;
(3)配置油酸-乙醇溶液,油酸与乙醇的体积比为3:47,另取适量Fe(acac)3加入油酸-乙醇溶液,混合搅拌10min,转移至钢衬的高压反应釜中,180摄氏度反应12h,待反应结束,将反应釜冷却至室温,取出沉淀物,10000rpm离心收集沉淀,并用乙醇多次洗涤,获得油酸稳定的Fe3O4 NPs;
(4)取(3)中油酸稳定的Fe3O4 NPs,加入聚乙二醇mPEG-COOH,反应6h, 10000rpm离心收集沉淀,甲醇多次洗涤,分散在甲醇中,获得聚乙二醇稳定的 Fe3O4 NPs;
(5)取硝酸锌和二甲基咪唑分别溶于甲醇中,另取(2)中聚乙二醇稳定的Au NPs和(4)中聚乙二醇稳定的Fe3O4 NPs分散在硝酸锌-甲醇溶液中,机械搅拌60s,然后加入二甲基咪唑-甲醇溶液,待反应结束,8000rpm离心收集沉淀,用甲醇反复洗涤去除未反应组分,获得zif-8同时负载Au NPs和Fe3O4 NPs的纳米球。优选的,步骤(1)中制备的Au NPs溶液的浓度为3-4nmol/L。
优选的,步骤(2)中聚乙二醇mPEG-SH的浓度为5-20μmol/L。
优选的,步骤(3)中Fe(acac)3-油酸-乙醇溶液浓度为0.01-0.05mmol/mL。
优选的,步骤(3)中油酸稳定的Fe3O4 NPs溶液的浓度为5μmol/L。
优选的,步骤(4)中聚乙二醇mPEG-COOH的浓度为5-20μmol/L。
优选的,步骤(5)中硝酸锌与二甲基咪唑的摩尔比为1:8。
更优选的,zif-8纳米球同时负载Au NPs和Fe3O4 NPs。
优选的,zif-8负载的两种纳米粒子制备的纳米球具有光热性能和磁共振成像作用。
优选的,zif-8负载的两种纳米粒子制备的纳米球可用于生物探针、磁靶向等多种用途,尤其适用于癌症的磁靶向给药和细胞内光热治疗。
本发明的有益效果:
1、本发明解决了现有技术的单一负载,同时负载两种不同功能的纳米粒子有利于更多功能化的设计及利用。
2、本发明的纳米粒子产率高,Au NPs和Fe3O4 NPs的负载量高,粒径均匀稳定,制备过程安全无毒。
3、zif-8同时负载Au NPs和Fe3O4 NPs的反应过程受反应时间影响,zif-8纳米粒子的粒径增大,负载量也增加,根据不同的实验设计可以选择不同的反应时间。
4.本发明zif-8同时负载Au NPs和Fe3O4 NPs的过程对设备要求低,高效,有很广阔的应用前景。
附图说明
图1为本发明zif-8纳米粒子的透射电镜形貌图;
图2为本发明zif-8纳米球同时负载Au NPs和Fe3O4 NPs的透射电镜形貌图;
图3为本发明zif-8纳米球同时负载Au NPs和Fe3O4 NPs的扫描电镜形貌图;
图4为本发明zif-8纳米球同时负载Au NPs和Fe3O4 NPs的BET图;
图5为本发明zif-8纳米球同时负载Au NPs和Fe3O4 NPs的孔径分布图;
图6为本发明zif-8纳米球同时负载Au NPs和Fe3O4 NPs的XRD图;
图7为本发明zif-8纳米球同时负载Au NPs和Fe3O4 NPs的TGA图。
具体实施方式
实施例一
(1)利用文献描述的经典方法柠檬酸钠还原法合成13nmAu NPs,简单的,将0.01%,300mL氯金酸至于带有回流冷凝管的500mL圆底烧瓶中,剧烈沸腾后开始搅拌加入1%,9mL柠檬酸三钠水溶液,反应20min,直到溶液变成红色,将所得Au NPs溶液迅速冰水冷却,备用;
(2)取(1)中Au NPs,加入50mL聚乙二醇mPEG-SH,反应2h,16000rpm 离心收集沉淀,并用去离子水分散洗涤3次,分散在甲醇中,获得聚乙二醇稳定的Au NPs;
(3)配置100mL油酸-乙醇溶液,油酸与乙醇的体积比为3:47,另取5mmol Fe(acac)3加入油酸-乙醇溶液,混合搅拌10min,转移至200mL钢衬的高压反应釜中,180摄氏度反应12h,待反应结束,将反应釜冷却至室温,取出沉淀物, 10000rpm离心收集沉淀,并用乙醇多次洗涤,获得油酸稳定的Fe3O4 NPs;
(4)取(3)中油酸稳定的Fe3O4 NPs,加入20mL聚乙二醇mPEG-COOH,反应6h,10000rpm离心收集沉淀,甲醇多次洗涤,分散在甲醇中,获得聚乙二醇稳定的Fe3O4 NPs;
(5)取硝酸锌和二甲基咪唑分别溶于甲醇中,另取(2)中聚乙二醇稳定的Au NPs和(4)中聚乙二醇稳定的Fe3O4 NPs分散在5mL硝酸锌-甲醇溶液中,机械搅拌60s,然后加入5mL二甲基咪唑-甲醇溶液,待反应结束,8000rpm离心收集沉淀,用甲醇反复洗涤去除未反应组分,获得zif-8同时负载Au NPs和Fe3O4 NPs 的纳米球。
实施例二
(1)利用文献描述的经典方法柠檬酸钠还原法合成13nmAu NPs,简单的,将0.01%,300mL氯金酸至于带有回流冷凝管的500mL圆底烧瓶中,剧烈沸腾后开始搅拌加入1%,9mL柠檬酸三钠水溶液,反应20min,直到溶液变成红色,将所得Au NPs溶液迅速冰水冷却,备用;
(2)取(1)中Au NPs,加入50mL聚乙二醇mPEG-SH,反应2h,16000rpm 离心收集沉淀,并用去离子水分散洗涤3次,分散在甲醇中,获得聚乙二醇稳定的Au NPs;
(3)配置100mL油酸-乙醇溶液,油酸与乙醇的体积比为3:47,另取1mmol Fe(acac)3加入油酸-乙醇溶液,混合搅拌10min,转移至200mL钢衬的高压反应釜中,180摄氏度反应12h,待反应结束,将反应釜冷却至室温,取出沉淀物, 10000rpm离心收集沉淀,并用乙醇多次洗涤,获得油酸稳定的Fe3O4 NPs;
(4)取(3)中油酸稳定的Fe3O4 NPs,加入50mL聚乙二醇mPEG-COOH,反应6h,10000rpm离心收集沉淀,甲醇多次洗涤,分散在甲醇中,获得聚乙二醇稳定的Fe3O4 NPs;
(5)取硝酸锌和二甲基咪唑分别溶于甲醇中,另取(2)中聚乙二醇稳定的Au NPs和(4)中聚乙二醇稳定的Fe3O4 NPs分散在10mL硝酸锌-甲醇溶液中,机械搅拌60s,然后加入10mL二甲基咪唑-甲醇溶液,待反应结束,8000rpm离心收集沉淀,用甲醇反复洗涤去除未反应组分,获得zif-8同时负载Au NPs和Fe3O4 NPs的纳米球。
实施例三
(1)利用文献描述的经典方法柠檬酸钠还原法合成13nmAu NPs,简单的,将0.01%,300mL氯金酸至于带有回流冷凝管的500mL圆底烧瓶中,剧烈沸腾后开始搅拌加入1%,9mL柠檬酸三钠水溶液,反应20min,直到溶液变成红色,将所得Au NPs溶液迅速冰水冷却,备用;
(2)取(1)中Au NPs,加入50mL聚乙二醇mPEG-SH,反应2h,16000rpm 离心收集沉淀,并用去离子水分散洗涤3次,分散在甲醇中,获得聚乙二醇稳定的Au NPs;
(3)配置100mL油酸-乙醇溶液,油酸与乙醇的体积比为3:47,另取3mmol Fe(acac)3加入油酸-乙醇溶液,混合搅拌10min,转移至200mL钢衬的高压反应釜中,180摄氏度反应12h,待反应结束,将反应釜冷却至室温,取出沉淀物, 10000rpm离心收集沉淀,并用乙醇多次洗涤,获得油酸稳定的Fe3O4 NPs;
(4)取(3)中油酸稳定的Fe3O4 NPs,加入20mL聚乙二醇mPEG-COOH,反应6h,10000rpm离心收集沉淀,甲醇多次洗涤,分散在甲醇中,获得聚乙二醇稳定的Fe3O4 NPs;
(5)取硝酸锌和二甲基咪唑分别溶于甲醇中,另取(2)中聚乙二醇稳定的Au NPs和(4)中聚乙二醇稳定的Fe3O4 NPs分散在50mL硝酸锌-甲醇溶液中,机械搅拌60s,然后加入50mL二甲基咪唑-甲醇溶液,待反应结束,8000rpm离心收集沉淀,用甲醇反复洗涤去除未反应组分,获得zif-8同时负载Au NPs和Fe3O4 NPs的纳米球。
Claims (7)
1.一种zif-8纳米球同时负载Au NPs和Fe3O4 NPs的方法,其特征在于,由如下方法制备而成:
(1)利用柠檬酸钠还原法合成13nmAu NPs,将0.01%,300mL氯金酸置于 带有回流冷凝管的500mL圆底烧瓶中,剧烈沸腾后开始搅拌加入1%,9mL柠檬酸三钠水溶液,反应20min,直到溶液变成红色,将所得Au NPs溶液迅速冰水冷却,备用;
(2)取(1)中Au NPs,加入聚乙二醇mPEG-SH,反应2h,16000rpm离心收集沉淀,并用去离子水分散洗涤3次,分散在甲醇中,获得聚乙二醇稳定的Au NPs;
(3)配置油酸-乙醇溶液,油酸与乙醇的体积比为3:47,另取适量Fe(acac)3加入油酸-乙醇溶液,混合搅拌10min,转移至钢衬的高压反应釜中,180摄氏度反应12h,待反应结束,将反应釜冷却至室温,取出沉淀物,10000rpm离心收集沉淀,并用乙醇多次洗涤,获得油酸稳定的Fe3O4 NPs;
(4)取(3)中油酸稳定的Fe3O4 NPs,加入聚乙二醇mPEG-COOH,反应6h,10000rpm离心收集沉淀,甲醇多次洗涤,分散在甲醇中,获得聚乙二醇稳定的Fe3O4 NPs;
(5)取硝酸锌和二甲基咪唑分别溶于甲醇中,另取(2)中聚乙二醇稳定的Au NPs和(4)中聚乙二醇稳定的Fe3O4 NPs分散在硝酸锌-甲醇溶液中,机械搅拌60s,然后加入二甲基咪唑-甲醇溶液,待反应结束,8000rpm离心收集沉淀,用甲醇反复洗涤去除未反应组分,获得zif-8同时负载Au NPs和Fe3O4 NPs的纳米球。
2.根据权利要求1所述的一种zif-8纳米球同时负载Au NPs和Fe3O4 NPs的方法,其特征在于,步骤(1)中制备的Au NPs溶液的浓度为3-4nmol/L。
3.根据权利要求1所述的一种zif-8纳米球同时负载Au NPs和Fe3O4 NPs的方法,其特征在于,步骤(2)中聚乙二醇mPEG-SH的浓度为5-20μmol/L。
4.根据权利要求1所述的一种zif-8纳米球同时负载Au NPs和Fe3O4 NPs的方法,其特征在于,步骤(3)中Fe(acac)3-油酸-乙醇溶液浓度为0.01-0.05mmol/mL。
5.根据权利要求1所述的一种zif-8纳米球同时负载Au NPs和Fe3O4 NPs的方法,其特征在于,步骤(4)中聚乙二醇mPEG-COOH的浓度为5-20μmol/L。
6.根据权利要求1所述的一种zif-8纳米球同时负载Au NPs和Fe3O4 NPs的方法,其特征在于,步骤(5)中硝酸锌与二甲基咪唑的摩尔比为1:8。
7.根据权利要求1所述的一种zif-8纳米球同时负载Au NPs和Fe3O4 NPs的方法,其特征在于,zif-8纳米球同时负载Au NPs和Fe3O4 NPs。
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