本文主要研究内容
作者田文慧（2019）在《无机半导体/聚合物复合纳米材料的制备及催化性能研究》一文中研究指出：在过去的几十年中,光催化作为一种绿色安全的技术,引起了许多学者的关注,已在太阳能转换和环境净化领域被广泛的应用。在光催化反应中,传统的半导体材料如ZnO和TiO2作为光催化剂已被深入的研究。然而,这些半导体材料由于其宽带隙的特性只能吸收紫外光,降低了其在太阳光下的光催化效率。为此,研究者们通常将半导体材料与其他材料进行复合改性,改性后的复合材料拓宽了光吸收范围,且产生的电子和空穴更易分离这在很大程度上增强了半导体的光催化效率。另外从实际应用的角度出发,能否重复循环使用是半导体复合材料面临的挑战。本文以Ag-Ag3PO4/PAN和SnS2/PANI为研究对象,针对材料的可见光利用率低与电子和空穴易复合光催化效率低,不易回收等问题进行研究,具体研究成果如下:在本研究中,通过沉淀法和还原法制备了基于电纺聚丙烯腈（PAN）纳米纤维的Ag-Ag3PO4网状纳米结构。将所制得的材料进行X射线衍射和X射线光电子能谱分析可以得出成功获得了Ag-Ag3PO4/PAN材料。通过扫描电镜可以清晰地观察出复合纳米材料的微观结构。紫外-可见漫反射光谱分析表明,Ag-Ag3PO4/PAN复合纳米材料的可见光吸收能力高于Ag/PAN和Ag3PO4/PAN材料。将所制备的Ag-Ag3PO4/PAN复合纳米材料对革兰氏阴性菌E.coli和革兰氏阳性菌S.aureus进行灭菌。结果表明,在可见光和黑暗条件下Ag-Ag3PO4/PAN复合纳米材料对E.coli和S.aureus的灭菌活性优于Ag/PAN和Ag3PO4/PAN。这是由于Ag-Ag3PO4/PAN这个体系降低了电子空穴的复合机率,提高了可见光的光催化效率。在可见光条件下Ag-Ag3PO4/PAN在90 min内完全灭活E.coli细胞,150 min内完全灭活S.aureus。复合纳米材料回收重复使用四次后光催化杀菌效率仍不低于90%。此外,PAN纳米纤维具有大的连续网状结构使Ag-Ag3PO4/PAN复合纳米材料更易从溶液中分离。通过溶剂热-氧化聚合方法制备SnS2/PANI复合纳米材料。经过XRD、SEM、XPS等表征验证出已经成功的获得了SnS2/PANI复合纳米材料。将所制备的SnS2/PANI复合纳米材料对染料MB溶液进行降解来验证其光催化能力。通过改变不同的工艺参数,如:苯胺负载量、MB溶液的初始pH值、MB溶液的初始浓度、催化剂用量。证明SnS2/PANI的可见光催化能力优于纯的SnS2。SnS2是一种稳定的可见光催化剂,但是电子和空穴易复合。当与具有良好电荷传输能力的导电聚合物PANI复合后,由于PANI和SnS2具有匹配的电子能带,有利于SnS2的电子和空穴分离和转移,提高了光催化活性。SnS2/PANI复合纳米材料回收重复使用四次后,其光催化效果仍不低于90%。通过以上研究可以得出所制备的SnS2/PANI纳米复合材料具有高效,可以重复使用等优良性能。
Abstract
zai guo qu de ji shi nian zhong ,guang cui hua zuo wei yi chong lu se an quan de ji shu ,yin qi le hu duo xue zhe de guan zhu ,yi zai tai yang neng zhuai huan he huan jing jing hua ling yu bei an fan de ying yong 。zai guang cui hua fan ying zhong ,chuan tong de ban dao ti cai liao ru ZnOhe TiO2zuo wei guang cui hua ji yi bei shen ru de yan jiu 。ran er ,zhe xie ban dao ti cai liao you yu ji kuan dai xi de te xing zhi neng xi shou zi wai guang ,jiang di le ji zai tai yang guang xia de guang cui hua xiao lv 。wei ci ,yan jiu zhe men tong chang jiang ban dao ti cai liao yu ji ta cai liao jin hang fu ge gai xing ,gai xing hou de fu ge cai liao ta kuan le guang xi shou fan wei ,ju chan sheng de dian zi he kong xue geng yi fen li zhe zai hen da cheng du shang zeng jiang le ban dao ti de guang cui hua xiao lv 。ling wai cong shi ji ying yong de jiao du chu fa ,neng fou chong fu xun huan shi yong shi ban dao ti fu ge cai liao mian lin de tiao zhan 。ben wen yi Ag-Ag3PO4/PANhe SnS2/PANIwei yan jiu dui xiang ,zhen dui cai liao de ke jian guang li yong lv di yu dian zi he kong xue yi fu ge guang cui hua xiao lv di ,bu yi hui shou deng wen ti jin hang yan jiu ,ju ti yan jiu cheng guo ru xia :zai ben yan jiu zhong ,tong guo chen dian fa he hai yuan fa zhi bei le ji yu dian fang ju bing xi jing （PAN）na mi qian wei de Ag-Ag3PO4wang zhuang na mi jie gou 。jiang suo zhi de de cai liao jin hang Xshe xian yan she he Xshe xian guang dian zi neng pu fen xi ke yi de chu cheng gong huo de le Ag-Ag3PO4/PANcai liao 。tong guo sao miao dian jing ke yi qing xi de guan cha chu fu ge na mi cai liao de wei guan jie gou 。zi wai -ke jian man fan she guang pu fen xi biao ming ,Ag-Ag3PO4/PANfu ge na mi cai liao de ke jian guang xi shou neng li gao yu Ag/PANhe Ag3PO4/PANcai liao 。jiang suo zhi bei de Ag-Ag3PO4/PANfu ge na mi cai liao dui ge lan shi yin xing jun E.colihe ge lan shi yang xing jun S.aureusjin hang mie jun 。jie guo biao ming ,zai ke jian guang he hei an tiao jian xia Ag-Ag3PO4/PANfu ge na mi cai liao dui E.colihe S.aureusde mie jun huo xing you yu Ag/PANhe Ag3PO4/PAN。zhe shi you yu Ag-Ag3PO4/PANzhe ge ti ji jiang di le dian zi kong xue de fu ge ji lv ,di gao le ke jian guang de guang cui hua xiao lv 。zai ke jian guang tiao jian xia Ag-Ag3PO4/PANzai 90 minnei wan quan mie huo E.colixi bao ,150 minnei wan quan mie huo S.aureus。fu ge na mi cai liao hui shou chong fu shi yong si ci hou guang cui hua sha jun xiao lv reng bu di yu 90%。ci wai ,PANna mi qian wei ju you da de lian xu wang zhuang jie gou shi Ag-Ag3PO4/PANfu ge na mi cai liao geng yi cong rong ye zhong fen li 。tong guo rong ji re -yang hua ju ge fang fa zhi bei SnS2/PANIfu ge na mi cai liao 。jing guo XRD、SEM、XPSdeng biao zheng yan zheng chu yi jing cheng gong de huo de le SnS2/PANIfu ge na mi cai liao 。jiang suo zhi bei de SnS2/PANIfu ge na mi cai liao dui ran liao MBrong ye jin hang jiang jie lai yan zheng ji guang cui hua neng li 。tong guo gai bian bu tong de gong yi can shu ,ru :ben an fu zai liang 、MBrong ye de chu shi pHzhi 、MBrong ye de chu shi nong du 、cui hua ji yong liang 。zheng ming SnS2/PANIde ke jian guang cui hua neng li you yu chun de SnS2。SnS2shi yi chong wen ding de ke jian guang cui hua ji ,dan shi dian zi he kong xue yi fu ge 。dang yu ju you liang hao dian he chuan shu neng li de dao dian ju ge wu PANIfu ge hou ,you yu PANIhe SnS2ju you pi pei de dian zi neng dai ,you li yu SnS2de dian zi he kong xue fen li he zhuai yi ,di gao le guang cui hua huo xing 。SnS2/PANIfu ge na mi cai liao hui shou chong fu shi yong si ci hou ,ji guang cui hua xiao guo reng bu di yu 90%。tong guo yi shang yan jiu ke yi de chu suo zhi bei de SnS2/PANIna mi fu ge cai liao ju you gao xiao ,ke yi chong fu shi yong deng you liang xing neng 。
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论文作者分别是来自长春工业大学的田文慧，发表于刊物长春工业大学2019-09-04论文，是一篇关于光催化论文,抗菌论文,复合纳米材料论文,长春工业大学2019-09-04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，资料来自长春工业大学2019-09-04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：光催化论文; 抗菌论文; 复合纳米材料论文; 长春工业大学2019-09-04论文;