本文主要研究内容
作者吴腾腾(2019)在《MOFs及其衍生物在电催化和类酶催化方面的应用》一文中研究指出:金属有机框架(Metal organic frameworks,MOFs)因为具有多孔性、大的比表面积、易修饰和大量暴露的活性位点等特点被广泛应用于多种领域。目前对MOFs进行改性并充分发挥其优势引起了科研界的极大关注。一些碳化后的MOFs其稳定性、导电性以及催化活性都有很大地提高,在电催化方面也表现出令人满意的结果。同时,利用MOFs的多孔性和刚性结构,可用作载体与其它功能性材料结合制备以MOFs为基础的复合材料。复合材料不但兼具主体和客体材料的优点,还可以由二者的协同作用产生新的性能,大大扩展了MOFs的应用。本文在总结近期MOFs及其衍生物研究进展的基础上,对几种MOFs进行改性得到具有新功能的复合材料并探究MOFs在类酶催化和电催化的初步应用。具体内容如下:1.制备了HKUST-1,并利用HKUST-1作为电催化剂,在环境条件下可将N2转化为NH3,在–0.75 V vs.RHE产氨速率高达46.63μg h–1mg–1cat,法拉第效率是2.45%。而且HKUST-1在N2还原反应(NRR)中表现出很强的稳定性,重复使用性,以及优异的选择性。该方法可以克服传统的Haber-Bosch法在合成氨的过程中具有高耗能和大量二氧化碳释放的缺点,即可在温和的条件下进行电催化NRR合成氨。该方法拓展了MOFs材料在电催化产氨领域的应用。2.将FeCo合金包裹进ZIF-8中并进一步碳化得到新型铁钴纳米粒子掺杂的多孔碳纳米笼(FeCo NPs@PNC)。由于FeCo NPs和多孔碳纳米笼(PNC)之间的协同催化作用,FeCo NPs@PNC具有增强的类氧化酶活性。不加H2O2时,FeCo NPs@PNC催化3,3’,5,5’-四甲基联苯胺(TMB)的氧化导致溶液由无色变成蓝色,并在652 nm处具有最大紫外吸收值。而抗坏血酸(AA)可以还原蓝色溶液褪色。因此,构建了一种新型的比色生物传感平台定量检测AA,检测范围是0.5–28μM,最低检测限为0.38μM。碱性磷酸酶(ALP)可以催化L-抗坏血酸-2-磷酸盐(AAP)水解成AA。因此也可以用上述方法定量ALP活性,检测ALP的线性范围是0.6–10 U·L–1,最低检测限是0.49 U·L–1。FeCo NPs@PNC还表现出很高的稳定性和可循环使用性。3.直接碳化FeCo-ZIF得到FeCo共掺杂的碳球(FeCo@C),具有类氧化酶和类过氧化物酶两种催化活性,并且通过合适的方法可调节双酶活性避免相互间的干扰并实现双功能比色检测。在pH 3.6和催化时间为6分钟时,FeCo@C具有强的类氧化酶催化活性;然而,随着将pH增至4.4,催化时间为3分钟,FeCo@C的类氧化酶活性显著降低,而类过氧化物酶活性仍然很高。控制上述不同反应条件,基于类氧化酶性质构建比色传感器检测对苯二酚(HQ),线性范围为1–30μM,最低检出限为0.8μM;基于类过氧化物酶性质采用比色法检测H2O2,线性范围为1–240μM,最低检出限为1μM。且已制备的FeCo@C具有较高的稳定性和循环使用性。
Abstract
jin shu you ji kuang jia (Metal organic frameworks,MOFs)yin wei ju you duo kong xing 、da de bi biao mian ji 、yi xiu shi he da liang bao lou de huo xing wei dian deng te dian bei an fan ying yong yu duo chong ling yu 。mu qian dui MOFsjin hang gai xing bing chong fen fa hui ji you shi yin qi le ke yan jie de ji da guan zhu 。yi xie tan hua hou de MOFsji wen ding xing 、dao dian xing yi ji cui hua huo xing dou you hen da de di gao ,zai dian cui hua fang mian ye biao xian chu ling ren man yi de jie guo 。tong shi ,li yong MOFsde duo kong xing he gang xing jie gou ,ke yong zuo zai ti yu ji ta gong neng xing cai liao jie ge zhi bei yi MOFswei ji chu de fu ge cai liao 。fu ge cai liao bu dan jian ju zhu ti he ke ti cai liao de you dian ,hai ke yi you er zhe de xie tong zuo yong chan sheng xin de xing neng ,da da kuo zhan le MOFsde ying yong 。ben wen zai zong jie jin ji MOFsji ji yan sheng wu yan jiu jin zhan de ji chu shang ,dui ji chong MOFsjin hang gai xing de dao ju you xin gong neng de fu ge cai liao bing tan jiu MOFszai lei mei cui hua he dian cui hua de chu bu ying yong 。ju ti nei rong ru xia :1.zhi bei le HKUST-1,bing li yong HKUST-1zuo wei dian cui hua ji ,zai huan jing tiao jian xia ke jiang N2zhuai hua wei NH3,zai –0.75 V vs.RHEchan an su lv gao da 46.63μg h–1mg–1cat,fa la di xiao lv shi 2.45%。er ju HKUST-1zai N2hai yuan fan ying (NRR)zhong biao xian chu hen jiang de wen ding xing ,chong fu shi yong xing ,yi ji you yi de shua ze xing 。gai fang fa ke yi ke fu chuan tong de Haber-Boschfa zai ge cheng an de guo cheng zhong ju you gao hao neng he da liang er yang hua tan shi fang de que dian ,ji ke zai wen he de tiao jian xia jin hang dian cui hua NRRge cheng an 。gai fang fa ta zhan le MOFscai liao zai dian cui hua chan an ling yu de ying yong 。2.jiang FeCoge jin bao guo jin ZIF-8zhong bing jin yi bu tan hua de dao xin xing tie gu na mi li zi can za de duo kong tan na mi long (FeCo NPs@PNC)。you yu FeCo NPshe duo kong tan na mi long (PNC)zhi jian de xie tong cui hua zuo yong ,FeCo NPs@PNCju you zeng jiang de lei yang hua mei huo xing 。bu jia H2O2shi ,FeCo NPs@PNCcui hua 3,3’,5,5’-si jia ji lian ben an (TMB)de yang hua dao zhi rong ye you mo se bian cheng lan se ,bing zai 652 nmchu ju you zui da zi wai xi shou zhi 。er kang huai xie suan (AA)ke yi hai yuan lan se rong ye tui se 。yin ci ,gou jian le yi chong xin xing de bi se sheng wu chuan gan ping tai ding liang jian ce AA,jian ce fan wei shi 0.5–28μM,zui di jian ce xian wei 0.38μM。jian xing lin suan mei (ALP)ke yi cui hua L-kang huai xie suan -2-lin suan yan (AAP)shui jie cheng AA。yin ci ye ke yi yong shang shu fang fa ding liang ALPhuo xing ,jian ce ALPde xian xing fan wei shi 0.6–10 U·L–1,zui di jian ce xian shi 0.49 U·L–1。FeCo NPs@PNChai biao xian chu hen gao de wen ding xing he ke xun huan shi yong xing 。3.zhi jie tan hua FeCo-ZIFde dao FeCogong can za de tan qiu (FeCo@C),ju you lei yang hua mei he lei guo yang hua wu mei liang chong cui hua huo xing ,bing ju tong guo ge kuo de fang fa ke diao jie shuang mei huo xing bi mian xiang hu jian de gan rao bing shi xian shuang gong neng bi se jian ce 。zai pH 3.6he cui hua shi jian wei 6fen zhong shi ,FeCo@Cju you jiang de lei yang hua mei cui hua huo xing ;ran er ,sui zhao jiang pHzeng zhi 4.4,cui hua shi jian wei 3fen zhong ,FeCo@Cde lei yang hua mei huo xing xian zhe jiang di ,er lei guo yang hua wu mei huo xing reng ran hen gao 。kong zhi shang shu bu tong fan ying tiao jian ,ji yu lei yang hua mei xing zhi gou jian bi se chuan gan qi jian ce dui ben er fen (HQ),xian xing fan wei wei 1–30μM,zui di jian chu xian wei 0.8μM;ji yu lei guo yang hua wu mei xing zhi cai yong bi se fa jian ce H2O2,xian xing fan wei wei 1–240μM,zui di jian chu xian wei 1μM。ju yi zhi bei de FeCo@Cju you jiao gao de wen ding xing he xun huan shi yong xing 。
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论文详细介绍
论文作者分别是来自湖南师范大学的吴腾腾,发表于刊物湖南师范大学2019-10-31论文,是一篇关于金属有机框架论文,电催化论文,氮还原反应论文,类酶催化论文,比色生物传感器论文,湖南师范大学2019-10-31论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自湖南师范大学2019-10-31论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:金属有机框架论文; 电催化论文; 氮还原反应论文; 类酶催化论文; 比色生物传感器论文; 湖南师范大学2019-10-31论文;